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The input is user friendly. The program makes use of an user
interface with an graphical user interface.
The application of this program mainly lies in the
calculation of the tanker movements in a certain environment
when moored to an offloading station. These offloading
stations can have the following configurations; Single Point
Mooring (SPM), Multi Buoy Mooring (MBM) or a Jetty.
Postprocessor output:
The program delivers the output in a binary code. A data
processing package is provided to obtain graphs and plots of
the ships’ movement. Also via an graphical interface the
validity of the model can be checked and to check at an
early stage the input errors.
Modelling:
- The
vessel is modeled with use of the OCIMF tanker database.
In this database the hydrodynamic data is stored for
several tankers. On basis of the dimensions of the
tanker considered the hydrodynamic coefficients are
derived.
-
Three
types of mooring systems are available; SPM, MBM an
Jetty.
-
SPM:
This is modeled with a conventional calm buoy which
is moored tot the seabed with anchor chains, the
tanker is moored tot the buoy via an hawser. The
hawser can be made of synthetic materials, for this
a database is included in the program
-
MBM:
The anchor legs can be modeled as anchor chains,
chain-buoy steel wire or chain-buoy synthetic rope.
-
Jetty: The Jetty consists of a fender and mooring
legs. Six types of fenders are available and the
mooring legs can be modeled as steel wire, synthetic
rope or a combination.
-
The
program makes use of an OCIMF diffraction date
containing several results of different tanker
configurations.
-
An intact and damaged situation can be simulated.
Loading:
- The
environment is modeled via different spectra
formulations. The wind field can be modeled as steady or
irregular, the waves and swell are irregular and from
different directions, the current is steady and the
water depth is arbitrary. The wind and current data are
obtained from an OCIMF database.
Summary:
TERMSIM is a time domain simulation program that simulates
moored tankers subjected to wind current and waves in
shallow water. The mooring systems that can be simulated are
Single Point Mooring systems (SPM), a Multi Buoy Mooring
system (MBM) or a Jetty terminal. The program calculates the
mooring loads and vessel motions in an environment subjected
to wind, waves and current. For doing this use is made of
several databases in order to evaluate every possible
scenario.
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