CN111339709B - Method and system for checking strength of offshore fixed type fan foundation and electronic equipment - Google Patents
Method and system for checking strength of offshore fixed type fan foundation and electronic equipment Download PDFInfo
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Abstract
The invention discloses a method and a system for checking strength of an offshore fixed type wind turbine foundation and electronic equipment, wherein the method comprises the following steps: acquiring environment data of the whole machine, and generating a plurality of design working conditions; according to a modeling command, a complete machine model which comprises a fan, a tower and a foundation which are integrally arranged is created, and a finite element file of the foundation is obtained; calculating according to the finite element file and a plurality of design working conditions to obtain a basic superunit file under each design working condition; establishing a half-model comprising the fan and the tower, and performing complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation; and analyzing the strength of the foundation according to each load file and the corresponding design working condition. The invention reduces the development cost of offshore wind power.
Description
Technical Field
The invention belongs to the technical field of wind power, and particularly relates to a strength checking method and system for an offshore fixed type wind turbine foundation and electronic equipment.
Background
24.5.2019, the national development and improvement committee issues a notice about perfecting the policy of wind power on-line electricity price, which means that offshore wind power 'bidding' on-line is inevitable. This puts higher demands on developers and equipment manufacturers, and new technical approaches are actively sought in the design of offshore wind power to eliminate technical costs. In the cost of offshore wind power, the unit purchase usually accounts for 30-40%, the basic purchase accounts for about 20-25%, and the construction cost usually exceeds 30%. Therefore, the cost of the foundation is reduced through technical innovation, and the method is an important way for reducing the power cost of offshore wind power.
The offshore fixed type fan consists of a fan, a tower and a foundation. Wherein, the foundation mainly comprises a gravity type, a single pile, a jacket, a high pile cap and the like. In the current domestic offshore wind power engineering design, the design of the offshore wind turbine foundation is usually carried out by adopting an independent step-by-step iterative design method. In the design method of independent step iteration, the foundation and the tower are separated at an interface, and when the ultimate strength of the foundation is checked, the wave load of the foundation is calculated by adopting a design wave method, and the wave load is directly added with the maximum wind load at the interface to obtain the stress response of the foundation. When checking the fatigue of the foundation, respectively calculating the fatigue damage caused by the equivalent fatigue wind load and the wave load at the interface, and superposing the equivalent fatigue wind load and the wave load to be used as the final fatigue damage of the foundation. The design method of independent step iteration ignores the simultaneity of wind, wave and flow loads, and the design result is too conservative, so that the design weight of the foundation is higher than the real actual required weight, and the development cost of offshore wind power is increased.
Disclosure of Invention
The invention aims to provide a strength checking method, a system and electronic equipment for an offshore fixed type wind turbine foundation, which are used for solving the problems that the design weight of the foundation is higher than the real actual required weight and the development cost of offshore wind power is increased due to the fact that the simultaneity of wind, wave and flow loads is neglected by adopting an independent step-by-step iteration design method in the prior art and the design result is too conservative.
In order to solve the problems, the invention is realized by the following technical scheme:
a strength checking method for an offshore fixed type wind turbine foundation comprises the following steps: and acquiring environment data of the whole machine, and generating a plurality of design working conditions. And according to the modeling command, creating a complete machine model integrally comprising the fan, the tower and the foundation to obtain a finite element file of the foundation. And calculating according to the finite element file and a plurality of design working conditions to obtain the basic superunit file under each design working condition. And establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation. And analyzing the strength of the foundation according to each load file and the corresponding design working condition.
Preferably, the method further comprises: acquiring key information for modeling the whole machine, and generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data.
Preferably, the environmental data comprises load data of wind load, wave load and ocean current load of the wind farm.
Preferably, the number of the basic superunit files is the same as the number of the design conditions.
Preferably, the number of the load files is the same as that of the design working conditions.
Preferably, the intensity analysis comprises: ultimate strength analysis and fatigue analysis of the basis.
On the other hand, the invention also provides a strength checking system of the offshore fixed type wind turbine foundation, which comprises the following components: and the data preprocessing module is used for acquiring the environmental data of the whole machine and generating a plurality of design working conditions.
The foundation superunit module is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to a modeling command to obtain a finite element file of the foundation; and calculating according to the finite element file and the plurality of design working conditions to obtain the basic superunit file under each design working condition. And the integrated load calculation module is used for establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the design working condition to obtain a plurality of load files at the interface of the tower and the foundation. And the basic strength checking module is used for analyzing the strength of the foundation according to each load file and the corresponding design working condition.
Preferably, the data preprocessing module is further configured to obtain key information for performing whole machine modeling; generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data.
Preferably, the environmental data comprises load data of wind load, wave load and ocean current load of the wind farm.
Preferably, the intensity analysis comprises: ultimate strength analysis and fatigue analysis of the basis.
In another aspect, the present invention further provides a method for calculating a load of an offshore fixed wind turbine foundation, including: and acquiring environment data of the whole machine, and generating a plurality of design working conditions. And according to the modeling command, creating a complete machine model integrally comprising the fan, the tower and the foundation to obtain a finite element file of the foundation. And calculating according to the finite element file and the plurality of design working conditions to obtain the basic superunit file under each design working condition. And establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation.
In other aspects, the present invention further provides a load calculating device for an offshore fixed wind turbine foundation, comprising:
the data preprocessing module is used for acquiring environment data of the whole machine and generating a plurality of design working conditions;
the foundation superunit module is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to a modeling command to obtain a finite element file of the foundation; and
calculating according to the finite element file and the plurality of design working conditions to obtain a basic superunit file under each design working condition;
and the integrated load calculation module is used for establishing a half-model comprising the fan and the tower, and performing complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation.
The invention further provides an electronic device, which comprises a processor and a memory, wherein the memory stores an SESAM software program, and when the SESAM software program is executed by the processor, the strength checking method of the marine fixed fan foundation is realized.
The invention also provides a readable storage medium, wherein an SESAM software program is stored in the readable storage medium, and when the SESAM software program is executed by a processor, the strength checking method of the marine fixed fan foundation is realized.
Compared with the prior art, the invention has at least one of the following advantages:
1) the invention can carry out integrated rapid modeling of the whole machine, generates a large number of calculation working conditions in batches, has high calculation efficiency and saves the cost of manpower and material resources.
2) The invention adopts integrated load simulation to calculate the load at the interface of the tower and the foundation, directly analyzes the strength of the foundation, considers the simultaneity of environmental data such as wind, wave, flow load and the like, can reduce the uncertainty of the offshore fixed type wind turbine foundation design and reduce the development cost of the offshore wind turbine.
3) Based on the ultimate strength analysis and fatigue analysis of the basis of the SESAM software program, the strength analysis and fatigue analysis of the basic rod piece and the basic node can be carried out by using methods given by international specifications such as DNV (digital hierarchy analysis) and API (application program interface) and the like built in the program, the calculation efficiency is high, and the result is reliable.
4) The calculation method provided by the invention considers the simultaneity of environmental data such as wind, wave, flow load and the like, and reduces the load at the interface of the foundation and the tower during design. Meanwhile, the load simulation time of the whole machine can be reduced.
Drawings
Fig. 1 is a flowchart of a strength checking method for an offshore fixed wind turbine foundation according to an embodiment of the present invention;
fig. 2 is a block diagram of a strength checking system of an offshore fixed wind turbine foundation according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The method, system, electronic device and storage medium for checking the strength of the marine fixed wind turbine foundation according to the present invention will be described in detail with reference to fig. 1 to 3 and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Under the combined action of wind, waves and currents, the load borne by the foundation comprises wind load, wave load and ocean current load transmitted by the top fan through the tower. The loads are random and jointly act on the foundation all the time, so when the foundation is designed, the wind turbine, the tower and the foundation are integrally modeled, the integrated load calculation is carried out, and the strength analysis is directly carried out on the foundation by utilizing the coupled wind load, wave load and ocean current load. Research shows that the engineering quantity can be reduced by 10-15% by adopting an integrated design scheme compared with the traditional design.
Specifically, as shown in fig. 1, the strength checking method for the marine fixed wind turbine foundation provided in this embodiment includes:
and step S1, acquiring environment data of the whole machine, and generating a plurality of design conditions according to preset design standards.
Preferably, in this embodiment, the environmental data includes load data of wind, waves and ocean currents of the wind farm. The preset design standard is IEC61400-3 design specification. The operating condition parameters of each design operating condition can comprise: wind parameters, wave parameters, fan state parameters, fan control parameters, and the like.
And S2, according to the modeling command, creating a complete machine model integrally comprising a fan, a tower and a foundation, and performing pile-soil linearization processing on the complete machine model to obtain a finite element file of the foundation.
Specifically, fan + tower + foundation integrated modeling is performed on the GeniE module according to the modeling command to obtain the complete machine model, pile-soil linearization is performed on the complete machine model after the integrated modeling is completed, and a finite element file of the foundation is derived.
Preferably, step S2 further includes: acquiring key information for modeling the whole machine, and generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data. Specifically, the modeling command which can be read by the GeniE module in the SESAM software is generated according to the key information.
And step S3, calculating according to the finite element file and the plurality of design conditions to obtain the basic superelement file under each design condition.
Preferably, in this embodiment, the number of the basic superunit files is the same as the number of the design conditions, and each basic superunit file includes a structure file and a payload file.
Specifically, the finite element files and all the design conditions generated in step S1 are imported into a Fatigue Manager module in SESAM software for calculation, and the basic superunit files under each design condition are output, including the basic structure file and the basic load file, where the structure file is a mat format file and the basic load file is a mat format file.
Step S4, establishing a half-model comprising the fan and the tower, and performing complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation.
Preferably, in this embodiment, the number of load files at the interface between the tower and the foundation is the same as the number of design conditions.
Specifically, a half-model of a fan plus a tower is built in blanked software according to wind turbine generator data and tower data, the basic superunit file is imported into the blanked software, wind, wave and ocean current integrated load simulation of the whole machine is carried out according to the design working condition, and after the integrated load simulation is completed, a load file at an interface between the tower and the base is output.
And S5, calculating the time domain dynamic response of the foundation according to each load file and the corresponding design working condition thereof, and finally analyzing the strength of the foundation according to the design specification.
Preferably, in the embodiment, the design specification is the DNV-OS-J101-2014 specification. The intensity analysis comprises: ultimate strength analysis and fatigue analysis of the basis.
Specifically, all the load files are imported into the Fatigue manager module, time domain dynamic response calculation of the foundation under each design condition is carried out, and finally, ultimate strength analysis and Fatigue analysis of the foundation are carried out according to the DNV-OS-J101-2014 design specifications.
The present invention is not limited to the specific sequence of steps S1 to S5, and for example, steps S1 and S2 may be reversed.
The main idea of a preferred embodiment of the invention is: firstly, carrying out integrated modeling on a fan, a tower, a foundation and soil in SESAM software, and generating a finite element file of the foundation after pile soil linearization is completed; secondly, importing the finite element file into a Fatigue Manager module of the SESAM software for calculation, and outputting basic superunit data; thirdly, establishing a fan and tower model in the Bladed software, inputting basic superunit data, performing wind, wave and flow load integrated calculation, outputting a load file at an interface of the tower and the foundation, guiding all the load files into a Fatigue manager module, performing time domain dynamic response calculation of the foundation under each design working condition, and finally performing ultimate strength analysis and Fatigue analysis of the foundation.
On the other hand, as shown in fig. 2, based on the same inventive concept, the invention further provides a strength checking system of an offshore fixed wind turbine foundation, comprising:
and the data preprocessing module 100 is used for acquiring the environment data of the whole machine and generating a plurality of design working conditions according to the design standard.
Specifically, the data preprocessing module 100 includes a calculation condition generation module 102; the calculation condition generation module 102 is configured to obtain environment data of the whole machine, and generate a plurality of design conditions according to a design standard.
Preferably, the data preprocessing module 100 is further configured to obtain key information for performing whole machine modeling; and generating a modeling command according to the key information.
Specifically, the data preprocessing module 100 further includes a modeling preprocessing module 101, where the modeling preprocessing module 101 is configured to obtain key information for performing whole machine modeling; and generating the modeling command according to the key information. Preferably, in this embodiment, the key information includes, but is not limited to, wind farm site water depth data, wind turbine data, tower data, foundation data, soil data, marine life data, and hydrodynamic coefficient data. Specifically, the modeling command which can be read by the GeniE module in the SESAM software is generated according to the key information.
The foundation superunit module 110 is configured to create a complete machine model integrally including a fan, a tower and a foundation according to a modeling command, and perform pile-soil linearization processing on the complete machine model to obtain a finite element file of the foundation; and calculating according to the finite element file and the plurality of design working conditions to obtain the basic superunit file under each design working condition.
Specifically, the basic superunit module 110 includes: the integrated modeling module 111 is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to the modeling command, and performing pile-soil linearization processing on the complete machine model to obtain the finite element file.
The superunit output module 112 is configured to perform calculation according to the finite element file of the foundation and the plurality of design conditions, so as to obtain a superunit file of the foundation under each of the plurality of design conditions.
Preferably, in this embodiment, the environmental data includes load data of wind, wave and flow of the wind farm. The design standard is IEC61400-3 design specification.
And the integrated load calculation module 120 is configured to establish a half-model including the wind turbine and the tower, and perform complete machine load simulation by combining the half-model, all the superunit files, and the plurality of design conditions to obtain a plurality of load files at an interface between the tower and the foundation.
The integrated load calculation module 120 includes: a fan tower modeling module 121 and a tower bottom load output module 122; the wind turbine tower modeling module 121 is configured to establish a half-model including the wind turbine and the tower, and specifically, is configured to establish a half-model of the wind turbine and the tower in Bladed software according to wind turbine generator data and tower data.
The tower bottom load output module 122 is configured to perform complete machine load simulation by combining the half-model, all the superunit files, and all the design conditions, and obtain a plurality of load files at an interface between the tower and the foundation.
And a basic strength checking module 130, configured to perform time-domain dynamic response calculation on the basis corresponding to each load file under the design condition according to the load file, and finally perform strength analysis on the basis according to a design specification.
The basic strength checking module 130 comprises a dynamic response calculating module 131 and a basic strength checking module 132; the dynamic response calculating module 131 is configured to import the load files generated by the tower bottom load output module 122 into the superunit output module 112 in batch for creating a Fatigue Manager working area, and perform basic time domain dynamic response calculation under each working condition.
The basic strength checking module 132 is configured to perform basic ultimate strength analysis and fatigue analysis according to, for example, DNV-OS-J101-2014 specifications, using the basic time-domain dynamic response result calculated by the dynamic response calculating module 131.
Therefore, the integrated rapid modeling of the whole machine can be carried out, a large number of design working conditions are generated in batches according to relevant design standards, the data files can be automatically transmitted, the calculation efficiency is high, and the labor and material cost are saved. The method provided by the embodiment adopts an integrated load simulation method of wind, wave and flow load data coupling to calculate the basic load of the foundation, and directly performs ultimate strength analysis (check) and fatigue analysis (check) on the foundation, so that the simultaneity of environmental data such as wind, wave and flow loads is considered, the uncertainty of the marine fixed fan basic design can be reduced, and the development cost of the marine fan is reduced. The method provided by the embodiment adopts the superunit file to perform data exchange between the SESAM software module and the Bladed module, so that the load simulation time of the Bladed module can be saved, and the confidentiality of data among different design units can be ensured. The ultimate strength analysis and fatigue analysis based on the basis of the SESAM software program can be used for carrying out the ultra-strength analysis and fatigue analysis of the rod piece and the node which are arranged on the basis by using methods given by international specifications such as DNV (digital hierarchy analysis) and API (application programming interface) and the like which are built in the program, and the calculation efficiency is high and the result is reliable.
Based on the same inventive concept, an embodiment of the present invention further provides a load calculation method for an offshore fixed wind turbine foundation, including:
acquiring environment data of the whole machine, and generating a plurality of design working conditions;
according to a modeling command, a complete machine model which comprises a fan, a tower and a foundation which are integrally arranged is created, and a finite element file of the foundation is obtained;
calculating according to the finite element file and the plurality of design working conditions to obtain a basic superunit file under each design working condition;
and establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation.
It can be seen that the present embodiment takes into account the simultaneity of environmental data, reducing the loads at the foundation-tower interface at design time. Meanwhile, the load simulation time of the whole machine can be reduced.
The invention also provides a load calculating device of the offshore fixed type wind turbine foundation, which comprises:
the data preprocessing module is used for acquiring environment data of the whole machine and generating a plurality of design working conditions;
the foundation superunit generation module is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to a modeling command to obtain a finite element file of the foundation;
the integrated load calculation module is used for calculating according to the finite element file of the foundation and the plurality of design working conditions to obtain the superunit file of the foundation under each design working condition;
and the basic strength checking module is used for establishing a half-machine model comprising the fan and the tower, and carrying out complete-machine load simulation by combining the half-machine model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation.
In still another aspect, based on the same inventive concept, the present invention further provides an electronic device, as shown in fig. 3, where the electronic device includes a processor 301 and a memory 303, and the memory 303 stores a computer program, and when the computer program is executed by the processor 301, the method for checking the strength of the marine fixed wind turbine foundation is implemented.
The electronic equipment provided by the embodiment can solve the problem that the design result is too conservative due to the fact that the simultaneity of wind, wave and flow loads is neglected by adopting an independent step-by-step iteration design method in the prior art, so that the basic design weight is higher than the real actual required weight, and the development cost of offshore wind power is increased.
With continued reference to fig. 3, the electronic device further comprises a communication interface 302 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 are communicated with each other through the communication bus 304. The communication bus 304 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus 304 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface 302 is used for communication between the electronic device and other devices.
The Processor 301 in this embodiment may be a Central Processing Unit (CPU), other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and so on. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 301 is the control center of the electronic device and connects the various parts of the whole electronic device by various interfaces and lines.
The memory 303 may be used for storing the computer program, and the processor 301 implements various functions of the electronic device by running or executing the computer program stored in the memory 303 and calling data stored in the memory 303.
The memory 303 may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
In other aspects, based on the same inventive concept, the present invention further provides a readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, can implement the strength checking method for the marine fixed wind turbine foundation as described above.
The readable storage medium provided by the embodiment can solve the problem that the design result is too conservative due to the fact that the simultaneity of wind, wave and flow loads is neglected by adopting an independent step-by-step iteration design method in the prior art, so that the basic design weight is higher than the real actual required weight, and the development cost of offshore wind power is increased.
The readable storage medium provided by this embodiment may take any combination of one or more computer-readable media. The readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this context, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
In this embodiment, computer program code for carrying out operations for embodiments may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It should be noted that the apparatuses and methods disclosed in the embodiments herein can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments herein. In this regard, each block in the flowchart or block diagrams may represent a module, a program, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments herein may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In summary, the present invention has at least one of the following advantages:
1) the invention can carry out integrated rapid modeling of the whole machine, generates a large number of calculation working conditions in batches, has high calculation efficiency and saves the cost of manpower and material resources.
2) The invention adopts integrated load simulation to calculate the load at the interface of the tower and the foundation, directly analyzes the strength of the foundation, considers the simultaneity of environmental data such as wind, wave, flow load and the like, can reduce the uncertainty of the offshore fixed type wind turbine foundation design and reduce the development cost of the offshore wind turbine.
3) Based on the ultimate strength analysis and fatigue analysis of the basis of the SESAM software program, the strength analysis and fatigue analysis of the basic rod piece and the basic node can be carried out by using methods given by international specifications such as DNV (digital hierarchy analysis) and API (application program interface) and the like built in the program, the calculation efficiency is high, and the result is reliable.
4) The calculation method provided by the invention considers the simultaneity of environmental data such as wind, wave, flow load and the like, and reduces the load at the interface of the foundation and the tower during design. Meanwhile, the load simulation time of the whole machine can be reduced.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A strength checking method for an offshore fixed type wind turbine foundation is characterized by comprising the following steps:
acquiring environment data of the whole machine, and generating a plurality of design working conditions;
according to a modeling command, a complete machine model which comprises a fan, a tower and a foundation which are integrally arranged is created, and a finite element file of the foundation is obtained;
calculating according to the finite element file and a plurality of design working conditions to obtain a basic superunit file under each design working condition; each design working condition corresponds to one basic superunit file;
establishing a half-model comprising the fan and the tower, and performing complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation; analyzing the strength of the foundation according to each load file and the corresponding design working condition;
the method further comprises the following steps: acquiring key information for modeling the whole machine, and generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data; the environmental data comprises load data of wind load, wave load and ocean current load of the wind power plant.
2. The method for strength verification of an offshore fixed wind turbine foundation of claim 1, wherein the number of superunit files of the foundation is the same as the number of design conditions.
3. The method for strength verification of an offshore fixed wind turbine foundation of claim 2, wherein the number of load files is the same as the number of design conditions.
4. A method for checking the strength of an offshore fixed wind turbine foundation according to any of claims 1 to 3, wherein the strength analysis comprises: ultimate strength analysis and fatigue analysis of the basis.
5. The utility model provides a system is checked to fixed fan foundation's intensity on sea which characterized in that includes:
the data preprocessing module is used for acquiring environment data of the whole machine and generating a plurality of design working conditions;
the foundation superunit module is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to a modeling command to obtain a finite element file of the foundation; calculating according to the finite element file and the plurality of design working conditions to obtain the basic superunit file under each design working condition; each design working condition corresponds to one basic superunit file;
the integrated load calculation module is used for establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the design working condition to obtain a plurality of load files at the interface of the tower and the foundation;
the basic strength checking module is used for analyzing the strength of the foundation according to each load file and the corresponding design working condition;
the data preprocessing module is also used for acquiring key information for modeling the whole machine; generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data; the environmental data comprises load data of wind load, wave load and ocean current load of the wind power plant.
6. The strength verification system for an offshore fixed wind turbine foundation of claim 5, wherein the strength analysis comprises: ultimate strength analysis and fatigue analysis of the basis.
7. A load calculation method for an offshore fixed type wind turbine foundation is characterized by comprising the following steps:
acquiring environment data of the whole machine, and generating a plurality of design working conditions; the environmental data comprises load data of wind load, wave load and ocean current load of the wind power plant;
according to a modeling command, a complete machine model which comprises a fan, a tower and a foundation which are integrally arranged is created, and a finite element file of the foundation is obtained; acquiring key information for modeling a whole machine; generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data;
calculating according to the finite element file and the plurality of design working conditions to obtain a basic superunit file under each design working condition; each design working condition corresponds to one basic superunit file;
establishing a half-model comprising the fan and the tower, and carrying out complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation;
and analyzing the strength of the foundation according to each load file and the corresponding design working condition.
8. A load calculation device for an offshore fixed wind turbine foundation, comprising:
the data preprocessing module is used for acquiring environment data of the whole machine and generating a plurality of design working conditions; the environmental data comprises load data of wind load, wave load and ocean current load of the wind power plant;
the foundation superunit module is used for creating a complete machine model integrally comprising a fan, a tower and a foundation according to a modeling command to obtain a finite element file of the foundation; the basic superunit module acquires key information for modeling the whole machine; generating the modeling command according to the key information; the key information comprises wind power plant site water depth data, wind turbine generator set data, tower data, basic data, soil data, marine organism data and hydrodynamic coefficient data; and
calculating according to the finite element file and the plurality of design working conditions to obtain a basic superunit file under each design working condition; each design working condition corresponds to one basic superunit file;
and the integrated load calculation module is used for establishing a half-model comprising the fan and the tower, performing complete machine load simulation by combining the half-model, all the superunit files and the plurality of design working conditions to obtain a plurality of load files at the interface of the tower and the foundation, and performing strength analysis on the foundation according to each load file and the corresponding design working condition thereof.
9. An electronic device comprising a processor and a memory, said memory having stored thereon a SESAM software program which, when executed by said processor, implements the method of any of claims 1 to 4.
10. A readable storage medium, characterized in that a SESAM software program is stored in the readable storage medium, which when executed by a processor, implements the method of any of claims 1 to 4.
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