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Strip theory has been added in Motions

Posted on September 7, 2021

Earlier this year we announced that we had added a new module to PIAS: Motions. With this module the seakeeping behavior of a monohull vessel can be analyzed. While at launch only a simple empirical model was available, we are happy to announce that the module has been extended with a strip theory based method.

This method is capable of computing the transfer functions for all six ship motions (surge, sway, heave, roll, pitch and yaw), and will be able to calculate the motion, velocity and acceleration of any point on the vessel. The operation of the software has been explained in the manual.

The strip theory is the fastest way to obtain a first reliable impression of all six ship motions. It gives an answer in a few minutes, depending on the number of headings, wave frequencies and the amount of frames specified in the PIAS model.

Output example