BMT Mooring & SPM 

              

 

Manufacturer: BMT Fluid Mechanics Limited

Website: http://www.bmtfm.com/  

 

Data Input:

  • Mooring line properties: every line can have different characteristics

  • Slope of the seabed

  • Friction of seabed

  • Forces and moments in vessel environment

  • Thruster forces and moments

  • Mooring system up to 12 lines

  • Floater or sinker attached to line segments

  • DP-control system characteristics.
Users:

not available at this time

Computer systems:

not available at this time

Postprocessor output:
  • Time-history of vessel motions

  • Time history of mooring and surge line tensions

  • Time history of DP-thruster forces

  • In order to obtain spectra and statistics etc, standard time-series analysis programs can be used.
Solution:
  • Quasi-static determination of equilibrium position and excursions

  • Dynamic simulation of momentary motion after line failure

  • Complex catenary analysis

  • Non-linear time-domain simulation of the motions of each moored floating body and of the resultant forces in the moorings or DP-thrusters

  • At each time step the following forces are recalculated: current forces, wind forces, wave frequency forces, wave drift forces, mooring forces and  DP forces.

  • Analyse general, open-water station-keeping
Modelling:
  • Quasi-static analysis

  • Dynamic response to sudden line failure

  • Quasi-static analysis of DP-thrusters

  • Mean wind and wind gust spectra

  • Wave fequency forces

  • Mean and slowly-varying wave drift forces
Loading:
  • Environmental forces and moments like current, wind, waves and drift

  • Seabed friction

  • DP-thruster forces and moments

  • Viscous drag forces and damping with relative motion terms
Summary:

 

Mooring is a quasi static mooring analysis program. There is also a feature that can analyse the dynamic response of a vessel to line failure. It can deal with conentional or complex catenary mooring systems, risers, gangway connections and other types of links and sub-surface or surface buoys. In addition, thrusters of DP-ships can be can be modelled and analysed in a quasi-static way.

 

BMTSPM (BMT Single Point Mooring) has been upgraded to a computer program to dynamically model the motions of moored and Dynamically Positioned offshore structures. It can carry out analyses in the non-linear time-domain and moreover DP-characteristics can be taken into account.

It can model simultaneously several buoys and vessels connected through several links and mooring lines.