Forward speed effects in the equations of ship motion
Abstract
The explicit speed dependency of the coefficients in the linear equations of ship motion is determined from an energy formulation of the problem as opposed to the usual striptheory formulation. For a completely symmetrical (longitudinal and lateral) ship, the crosscoupled damping coefficients resulting from the energy approach are shown to satisfy the Timman and Newman symmetry theorem identically. For ships possessing lateral symmetry only, a different form of symmetry among the crosscoupled damping coefficient is found to exist. The results of the energy approach are found to agree quite well with the results of three striptheory formulations regarding the speed dependency of the coefficients in the heave and pitch equations.
 Publication:

Journal of Sound Vibration
 Pub Date:
 December 1982
 DOI:
 10.1016/0022460X(82)902565
 Bibcode:
 1982JSV....85..303M