Valencia Conf
Valencia Conf
Valencia Conf
Manoeuvring Interaction
effects
calculations
Based on these studies
the
following
conclusions are drawn:
1. The studies give a
good idea about the
moored ship motion due
to the hydrodynamic
interaction induced by
the passage of another
ship in its proximity and
the consequent mooring
line forces.
2. The linear mooring
system considered here
predicts a higher force
than the interaction
force for a stiff mooring
system.
The
augmentation can be
due to the ship motion
dynamics. A further
stiffer system resulted in
a lower mooring force,
where the excursions are
expected to be small and
hence the ship motion
dynamics.
3. Based on the above
conclusion, one should
be careful when using
synthetic
ropes
for
mooring purposes. As
these ropes are less
stiff, the ship motion
dynamics
will
be
higher and hence the
mooring line forces
may go beyond the
expected level.
The
models
for
interaction effects will
be included in the
TOHPIC
simulator
tool.
Model testing
The
manoeuvring
characteristics for HSC
in shallow waters are
not well known. Since
this is very important
when docking it was
found
to
be
an
important shortage to
overcome. Therefore
manoeuvring tests have
been performed in deep
and shallow water for a
fast catamaran and for
a fast single hull and
mooring
tests
in
irregular waves for the
vessels lying along a
quay in deep and
models
will
be
implemented in the
TOHPIC
simulator
tool.
TOHPIC
Simulator tool
The software tool
developed in TOHPIC
is a ship manoeuvring
simulator
where
different interfaces and
port
layouts
are
implemented.
Scenarios of proposed
improvements
and
design ideas will be
simulated by use of
visual ship
and
mathematical models.
The tool will be used to
optimise circumstances
for a port and a ship
with respect to its
special conditions.
The methodology and
functionality will be
tested in three case
studies: Port of Dublin,
Nice and Barcelona.
The three scenario case
studies have been
visualised and the first
versions
of
the
software tool have been
tested by consortium
end-users.
S h ip
mathematical
models
The tests will serve as a
basis
for
the
development of two
advance mathematical
TOHPIC
project
information
Port Interface
Stena Line has a very
advanced High Speed
Craft terminal in Dun
Laoghaire that in many
respects forms a base
in the TOHPIC studies.
The
terminal
is
specialised for HSC
and are leading with
respect to
Safety aspects
Passengers facilities
Short turn around
time (only about 20
minutes for the
complete turn around)
Efficient mooring
device
Efficient flow of
vehicles
In order to develop
general solutions a
toolbox has been
accomplished.
The
toolbox will enable the
port to develop generic
berth constructions.
A matrix with different
types and limitations of
the present equipment
has been produced and
a survey of ships to
identify the variations
in positions of doors,
bollards and other
limiting measures has
been done. Ship-Shore
interface
equipment
has been designed and
standards that fit a
large number of ship
types are defined. The
next step in the
TOHPIC project is the
optimisation of the
physical
flow
of
objects, the terminal
layout and the general
port infrastructure as
Mooring/Unmooring,
Refuelling, Catering,
Loading/
Unloading
and logistics flow. A
high-lightened result is
the importance of
separating
foot
passengers transfer and
goods flow in order to
reduce accidents.
It is worthwhile to
point out that the
benefits gained by the
proposed
solutions
have to be compared
with the costs for their
implementation.
Future views
We will now switch to
more general views out
of the scope of the
TOHPIC project. A
statement that is very
well established is that
big ships effectively
handle big transport
volumes and weight. In
this case sea transport
is very successful. On
the other side how can
the possibilities of
coastal and inland sea
transports be extended?
This will often be in
combination with other
transport modes but
also in competition.
We believe that in this
case the actors have to
meet two fundamental
transport needs that
are: higher transport
frequencies and many
connecting points.
DC 10-30
100
Truck
75 metre
RORO
1.
Use
smaller
transport
units
1000
High speed
craft
condition is to build
lightweight
ship
constructions.
Our answers to the
question of how to
improve coastal and
inland ship transport
market share are:
Freight train
10
1
340 metre VLCC
0
10
100
1000
Km / hour
A fuel consumption /
performance
comparison
between
different
transport
modes are shown in
Fig. 4. Very Large
4.
Develop
an
intermodal
port
where sea meets road
and rail on one flat
surface.
5. Direct the seatrucks on demand
basis from a centralised
00
10
20
30
40
50
60
control
Infrastructure
Capital & maintenance
1,5
1,0
33 %
Fuel
Saving
70 %
50 %
Crew cost
100%
0,5
0,0
RoRo 5000
Seatruck 200
Truck 10 ton