Edit Menu - Seakeeping Calculations Related Options

Strip theory seakeeping calculations can now be performed within Hydrostatics, the functionality having been incorporated from the old Hydro module.

Up to 50 transverse sections are automatically generated and the added mass and damping coefficients calculated at these sections for a range of frequency parameters.

These coefficients are then integrated along the length of the vessel, and combined with speed correction terms to calculate the total added mass and damping coefficients.

The wave excitation forces are then calculated (based on one of two formulations) and these are used to solve the coupled equations of motions to obtain the vessel RAO's.

Once these have been calculated, the RAO's can be combined with a wave energy spectrum to obtain RMS's of the six motions, and combined together to give motions, velocities and accelerations at various predefined locations of interest.

Finally, by applying a voyage over various sea areas, a long term index may be produced for the vessel.

Results of these calculations is supplied in tabular and graphical form, with seakeeping polar diagrams produced for comparing motions against limiting criteria values.