Termsim        

Manufacturer: Marin research institute

Website: www.marin.nl

 

Data Input:

The input is user friendly. The program makes use of an user interface with an graphical user interface.

 

Applications:

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.

 

Solution:
  • Tanker motions
  • Mooring loads
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.