CN112027018A - Large-scale target model experimental apparatus of nuclear explosion under water - Google Patents

Abstract

The invention provides an experimental device for a large underwater nuclear explosion target model, which comprises: the device comprises two buoys, four buoys, a damping plate, a connecting column, a cable, a target plate, a back empty water tank, transverse stabilizing plates and explosive, wherein the two buoys are fixed by the four transverse stabilizing plates; the damping plates are vertically arranged below the floating cylinder at a certain interval and are connected by connecting columns, and the damping plates are used for reducing the vertical swing amplitude of the floating cylinder when the floating cylinder is subjected to underwater nuclear explosion impact; the back empty water tank is positioned below the floating cylinder, and the lifting lugs of the floating cylinder and the target holder are connected by utilizing a lifting ring in the mooring rope; the target plate is positioned on the target holder, and the target plate and the target holder are fixed by using bolts; the explosive is arranged between the target plate and the buoy and in the four cables. The invention aims to research the impact damage of large pulse width shock waves generated by underwater explosion on a target plate, and further solve the problem of the damage characteristic of a ship structure caused by load under the action of large pulse width shock of underwater nuclear explosion on a ship.

Description

An underwater nuclear explosion large-scale target model experimental device

technical field

The invention relates to an experimental device, in particular to an underwater nuclear explosion large-scale target model experimental device, which belongs to the technical field of model experiment target cabin design experiments and testing.

Background technique

Accurate ship damage characteristics can provide accurate theoretical and numerical calculations for the study of ship anti-knock, anti-shock design and optimization. Although a large number of scholars have carried out research on the impact damage of ships by underwater explosions, and obtained a lot of results. However, there are still few studies on the damage characteristics of ships in terms of underwater nuclear explosions.

Due to the high construction cost of ships, it is impossible to conduct a large number of physical experiments on ships. Therefore, a large number of scholars have conducted scale experiments on ships to study the mechanism of impact damage to the hull of underwater explosions. However, simple model experiments cannot accurately reflect the structural characteristics and damage characteristics of actual ships. Therefore, there is a need for a model technology and device that accurately reflects the characteristics of actual ships to conduct experimental research on the damage characteristics of ships in underwater nuclear explosions.

As mentioned above, an accurate and effective model method is in urgent need of research. At the same time, the model device is used to study the damage of the plate frame structure by the large pulse width shock wave of the underwater explosion, and then accurately obtain the underwater nuclear explosion. The characteristics of the real damage caused by large pulse width shock waves to ships.

SUMMARY OF THE INVENTION

Aiming at the problem of the damage characteristics of underwater nuclear explosion large pulse width shock waves to ships, the invention proposes a large underwater nuclear explosion target model experimental device, which is used to study the simulation of underwater nuclear explosion large pulse width shock waves to the plate frame structure Damage characteristics, designed to solve the problem of true-scale damage characteristics when ships are subjected to underwater nuclear explosions.

The purpose of the present invention is achieved in this way: including two buoys connected by a lateral stabilization plate, a back empty tank, a target holder fixed on the back water tank, a target plate arranged on the target holder, and used for connecting the back empty water tank The rope with the buoy, the explosive placed between the target plate and the floating body, the target plate is a double-layer hybrid skeleton target plate, a single-layer longitudinal skeleton target plate or a single-layer hybrid skeleton target plate.

The present invention also includes such structural features:

1. At least three layers of damping plates are respectively arranged below both ends of each buoy, and the damping plates and between the damping plates and the buoy are connected by connecting columns.

2. The rope used to connect the back empty water tank and the buoy means: there are two lifting lugs under each buoy, and four hanging lugs are respectively set on the four corners of the target bracket on the back empty water tank. There are four lugs, and the ropes are vertically connected between the corresponding lifting lugs.

3. The back empty water tank includes a gravel compartment and a back empty compartment. The back empty compartment and the gravel compartment are separated by a middle plate, and the walls of the gravel compartment, the back empty compartment and the middle plate are all provided with T-beam stiffeners.

4. The inner surface of each buoy is provided with T-beam stiffeners.

5. During the experiment, the experimental device is placed in the water, the two buoys float on the water surface, and the other components are located underwater according to the positional relationship. The distance between the back empty tank and the buoy is adjusted according to the length of the cable, and the target plate is The experiment requires the selection of different types of plates; the large-pulse-width shock wave generated by the explosion of explosives will impact the load on the target plate, thereby obtaining the damage characteristics of the target plate. The target plate and the back empty water tank together form the structure and environment model of the cabin. The damage characteristics of the target plate can obtain the damage characteristics of the real scale of the ship structure.

Compared with the prior art, the beneficial effects of the present invention are: the present invention can obtain accurate and effective damage characteristics of the underwater nuclear explosion to the ship structure, and the present invention has carried out a scale design according to the frame structure of the real plate of the ship hull. . Multiple damping plates at both ends of the buoy are formed by connecting columns to form a damping plate group. Its function is to increase the additional mass force, which can effectively reduce the up and down swing of the buoy, control the rigid body movement and displacement of the entire device, and reduce the impact of shock waves on the device. The cable is made of flexible material, and its flexible characteristics are used to reduce the impact of the instantaneous explosion on the buoy. The back empty tank in the back empty water tank provides the air environment for the target board, and accurately simulates the environmental state of the ship in the ocean. The gravel silo in the back empty water tank provides counterweight for the back empty water tank, which has the effect of economy and convenience. Compared with the direct uniform steel counterweight or concrete structure counterweight, it can prevent spalling caused by stress waves. effect.

Description of drawings

Figure 1(a) is the positional relationship between the buoy, damping plate and connecting column; Figure 1(b) is the sectional view of the buoy;

Figure 2 is a schematic diagram of a cable and a hoisting ring;

Figure 3(a) is the external structure diagram of the double-layer target plate; Figure 3(b) is the cross-sectional view of the internal structure of the double-layer target plate;

Figure 3(c) is a single-layer longitudinal skeleton target plate; Figure 3(d) is a single-layer mixed skeleton target plate;

Figure 4(a) is an overall schematic diagram of the back empty water tank; Figure 4(b) is a cross-sectional view of the internal structure of the back empty water tank;

Figure 5 is a schematic structural diagram of a lateral stabilization plate;

6 is a schematic diagram of the working position of the present invention; the device is placed in the water, the buoy floats on the water surface, and the other devices are underwater;

FIG. 7 is a schematic diagram of the overall structure of the present invention.

In the picture: 1 buoy; 101 lifting lug; 102T type stiffener; 3 damping plate; 4 connecting column; 5 cable; 501 lifting ring; 6 target plate; 6-1 double-layer hybrid skeleton target plate; 6-2 single layer longitudinal Frame target plate; 6-3 single-layer hybrid frame target plate; 601 target plate bolt holes; 602 longitudinal frame; 603T stiffener; 604 reinforced rigid frame frame; 701 target bracket; 701-1 target bracket lifting lug; 702 back empty compartment side plate; 702-1T stiffener; 703 gravel compartment plate; 703-1 middle plate; 8 lateral stability plate; 9 dynamite.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

With reference to the accompanying drawings 1 to 7, an underwater nuclear explosion large-scale target model experimental device of the present invention, the specific structure of the device, the measurement process and the method are as follows:

1. The specific structure of the device

The present invention includes a buoy 1, a buoy 2 (the structures of the two buoys are exactly the same), a damping plate 3, a connecting column 4, a cable 5, a target plate 6, a back empty water tank 7, a lateral stabilization plate 8, and an explosive 9 in order from top to bottom. . The position between the buoy 1 and the buoy 2 is fixed by four lateral stabilizing plates 8 , and there are four connecting columns 4 under the two ends of each buoy. The connecting columns 4 are mainly used for spacing the damping plate 3 and constraining its freedom. There are two lifting lugs 101 at the abdomen of each buoy. The two buoys form four lifting positions. The lifting lugs 101 at both ends of the cable 5 are connected to the four lifting lugs 701-1 on the back empty tank 7. The target plate 6 is located on the target holder 701 of the back empty water tank 7 . The target plate and target holder are fixed with bolts. The explosive 9 is placed between the target plate 6 and the buoys 1 and 2, within the four cables 5, and the relative position with the back empty water tank 7 can be adjusted according to different experimental requirements.

The buoy 1 and the buoy 2 are connected by four lateral stabilizing plates 8 and the position between them is fixed, and its function (1) can provide four hanging positions for the lower back empty water tank 7, and the back empty water tank can be stably suspended on the back of the water tank. in water. (2) Provide enough buoyancy to better simulate the environment of the ship. (3) There are T-beam stiffeners 102 on the four inner walls of the buoy, and there are no stiffeners at both ends, the purpose of which is to improve the strength and stability of the buoy, as shown in Figure 1(b).

As shown in Fig. 1(a), there are four connecting columns 4 below both ends of each buoy. The connecting columns 4 are mainly used to space the damping plate 3 and constrain its degrees of freedom. The function of the damping plate is to increase the additional mass force, which can effectively reduce the up and down swing of the buoy, control the rigid body movement and displacement of the entire device, and reduce the impact of shock waves on the device. There are two lifting lugs 101 at the abdomen of each buoy. The two buoys form four lifting positions. The lifting lugs 101 at both ends of the cable 5 are connected to the four lifting lugs 701-1 on the back empty tank 7. The lifting lugs 701-1 are welded at the four corners between the target bracket 701 and the side plate 702 of the back empty water tank.

The target plate 6 is located on the target holder 701 of the back empty water tank 7, and the target plate and the target holder are rigidly fixed by bolts. There are three types of target plates of the device of the present invention, which are the double-layer hybrid skeleton target plate 6-1, as shown in Figures 3(a) and (b); the single-layer longitudinal skeleton target plate 6-2, as shown in Figure 3 ( c); the single-layer hybrid frame target plate 6-3, as shown in Figure 3(d); the longitudinal frame 602 on the target plate and the T-beam reinforcement 603 have the same structure. The purpose of reinforcing ribs and longitudinal skeleton is to improve the blast resistance of the target plate. The double-layer hybrid skeleton target plate 6-1 includes a target plate and a reinforced rigid frame 604, and the target plate bolt holes 601 are set on it, and in order to connect with the target bracket in the back empty water tank, and do not replace it for multiple tests The purpose of the target plate is to add a reinforced rigid frame around the target plate. The reinforced rigid frame 604 can increase the number of internal horizontal and vertical frames and T-beam reinforcing bars of the upper and lower panel walls according to the experimental strength requirements.

As shown in Figures 4(a) and (b), the back empty water tank 7 is composed of a back empty tank 7-1, a crushed stone warehouse 7-2 and a target bracket 701, and T-beams are added to the inner wall of each part The reinforcing rib 702-1 has the same structure and size, and its purpose is to improve the blast resistance strength of the back empty water tank. The back space 7-1 is composed of four back space side panels 702, which provide an air environment for the target board, which truly simulates the environment of the ship in seawater. The crushed stone cabin 7-2 is composed of five crushed stone cabin plates 703, which provide counterweight to the back empty cabin, which has the effect of economy and convenience, and can prevent stress compared with direct uniform steel counterweight or concrete structure counterweight Wave-induced spalling effect. In order to avoid interfering with the experiment, the back empty cabin 7-1 and the gravel cabin 7-2 are separated by a middle plate 703-1, and there are T-beam stiffeners 702-1 on the upper and lower sides.

As shown in FIG. 5 , the purpose of the lateral stabilization plate 8 is to fix the position between the two buoys and constrain the rotational freedom of the buoys, so as to prevent the buoys from turning over when they are subjected to an explosion impact. Two sets of T-beam stiffeners are added to one side of the lateral stabilization plate 8 to improve its anti-explosion strength.

In order to avoid the impact of the bubbles generated during the explosion on the target plate, the explosive 9 is placed between the target plate 6 and the buoys 1, 2, within the four cables 5, and the relative position between the back empty tank 7 can be determined according to Different experimental requirements can be adjusted, as shown in Figure 6.

2. Measurement process

As shown in Figure 6, during the experiment, the device of the present invention was placed in the water, the two buoys floated on the water surface, and other components such as the target plate were located underwater according to the positional relationship, and the distance between the back empty tank and the buoy was based on The length of the cable can be adjusted. The target plate selects different types of plates according to the experimental requirements.

The large pulse-width shock wave generated by the explosion of the explosive has a load impact on the target plate, so as to obtain the damage characteristics of the target plate. The target board and the back empty water tank together form the structure and environment model of the ship cabin. According to the damage characteristics of the target board, the damage characteristics of the ship structure can be obtained at the real scale.

To sum up, the present invention relates to a large-scale target model experimental device for underwater nuclear explosion. This device simulates the structure and environment of ships and explosion fields, and is mainly used for experimental research on the damage characteristics of ship hull structures caused by large pulse width shock waves generated by underwater nuclear explosions. The device of the present invention is mainly composed of: buoy 1, buoy 2, damping plate 3, connecting column 4, cable 5, target plate 6, back empty water tank 7, lateral stabilization plate 8 and explosive 9. The position between the buoy 1 and the buoy 2 is fixed by four lateral stabilizing plates 8; the damping plate 3 hangs down below the buoy at a certain distance, and is connected with the connecting column 4, which is used to reduce the impact of the buoy when the buoy is subjected to an underwater nuclear explosion. The up and down swing of the small buoys 1 and 2; the back empty water tank 7 is located under the buoy, and the lifting ring in the cable 5 is used to connect the buoy and the lifting lug of the target bracket 701; Fixing between the brackets; in order to avoid the influence of the bubbles generated by the explosion on the target plate during the experiment, the explosive 9 is placed between the target plate and the buoys 1 and 2, and within the four cables 5. The invention proposes a large-scale target model experiment technology and device for underwater nuclear explosion, aiming to study the impact damage to the target plate caused by the large-pulse-width shock wave generated by the underwater explosion, so as to solve the problem that the ship is subjected to the large-pulse-width underwater nuclear explosion. The damage characteristics of the hull structure caused by the load under impact.

Claims (10)

1. an underwater nuclear explosion large-scale target model experimental device, is characterized in that: comprise two buoys connected by lateral stabilization plate, back empty water tank, the target holder fixed on the back water tank, the target that is arranged on the target holder Plates, ropes used to connect the back empty water tank and the buoy, and explosives placed between the target plate and the floating body, the target plate is a double-layer hybrid frame target plate, a single-layer longitudinal frame target plate or a single-layer hybrid target plate Skeleton target plate. 2. a kind of underwater nuclear explosion large-scale target model experimental device according to claim 1, is characterized in that: the bottom of each buoy two ends is respectively provided with at least three layers of damping plates, between the damping plates, the damping plate and the buoy connected by connecting rods. 3. a kind of underwater nuclear explosion large-scale target model experimental device according to claim 1 and 2, is characterized in that: the rope that is used to connect back empty water tank and buoy means: be provided with below each buoy Two lifting ears, four lifting ears are respectively arranged on the four corners of the target holder on the back empty water tank, and there are four pulling ropes which are respectively vertically connected between the corresponding lifting ears. 4. a kind of underwater nuclear explosion large-scale target model experimental device according to claim 1 and 2, it is characterized in that: described back empty water tank comprises gravel chamber, back void, the back void and gravel chamber are between. The rooms are separated by an intermediate plate, and T-beam reinforcements are arranged on the walls of the gravel cabin, the back void, and the intermediate plate. 5. a kind of underwater nuclear explosion large-scale target model experimental device according to claim 3, is characterized in that: described back empty water tank comprises gravel compartment, back empty The middle plates are separated, and T-beam reinforcing bars are arranged on the walls of the gravel chamber, the back void and the middle plate partition. 6 . An underwater nuclear explosion large-scale target model experimental device according to claim 5 , wherein the inner surface of each buoy is provided with a T-beam reinforcing rib. 7 . 7. A kind of underwater nuclear explosion large-scale target model experimental device according to claim 1 or 2, is characterized in that: during experiment, the experimental device is placed in water, two buoys float on the water surface, and other parts are based on position The relationship is located underwater, the distance between the back empty water tank and the buoy is adjusted according to the length of the cable, and the target plate selects different types of plates according to the experimental requirements; Thereby, the damage characteristics of the target plate can be obtained. The target plate and the back empty water tank together form the structure and environment model of the cabin. According to the damage characteristics of the target plate, the damage characteristics of the real scale of the ship structure can be obtained. 8. a kind of underwater nuclear explosion large-scale target model experimental device according to claim 3, is characterized in that: when carrying out experiment, the experimental device is placed in water, two buoys float on the water surface, and other parts are based on positional relationship Located underwater, the distance between the back empty water tank and the buoy is adjusted according to the length of the cable, and the target plate is selected according to the experimental requirements. The damage characteristics of the target plate are obtained. The target plate and the back empty water tank together form the structure and environment model of the ship cabin. According to the damage characteristics of the target plate, the damage characteristics of the real scale of the ship structure can be obtained. 9. A kind of underwater nuclear explosion large-scale target model experimental device according to claim 4, it is characterized in that: when carrying out the experiment, the experimental device is placed in water, two buoys float on the water surface, and other parts are based on positional relationship Located underwater, the distance between the back empty water tank and the buoy is adjusted according to the length of the cable, and the target plate is selected according to the experimental requirements. The damage characteristics of the target plate are obtained. The target plate and the back empty water tank together form the structure and environment model of the ship cabin. According to the damage characteristics of the target plate, the damage characteristics of the real scale of the ship structure can be obtained. 10. A kind of underwater nuclear explosion large-scale target model experimental device according to claim 5, it is characterized in that: when carrying out the experiment, the experimental device is placed in the water, two buoys float on the water surface, and other parts are based on the positional relationship Located underwater, the distance between the back empty water tank and the buoy is adjusted according to the length of the cable, and the target plate is selected according to the experimental requirements. The damage characteristics of the target plate are obtained. The target plate and the back empty water tank together form the structure and environment model of the ship cabin. According to the damage characteristics of the target plate, the damage characteristics of the real scale of the ship structure can be obtained.

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