TIME DOMAIN ANALYSIS OF SHIP MOTIONS AND SEA LOADS IN IRREGULAR HEAD SEAS

Authors
  1. Hsiung, C.C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Technical Univ of Nova Scotia, Halifax NS (CAN) Centre for Marine Vessel Design and Research
Abstract
Theoretical formulation of a time domain solution of ship motions and sea loads in irregular head seas has been developed and presented in this report. After a literature review of the recent development in the time domain hydrodynamics, some available methods have been discussed. The causes that may affect the accuracy of ship motion prediction are analyzed, such as the free surface condition and the body surface boundary condition. Appropriate expressions for radiation forces, diffraction forces and sea loads are derived with the consideration of the efficiency of computation. The present solution method is able to incorporate nonlinear effects due to the nonlinear restoring force, nonlinear Froude-Krylov force and slamming force. It can be applied to the studies of the green water on the deck, stability in waves and capsizing as the large amplitude ship motion will be solved from the Eulerian equation of motion. TRUNCATED
Report Number
DREA-CR-91-420 — Contractor Report (Final)
Date of publication
15 Apr 1991
Number of Pages
47
DSTKIM No
91-04024
CANDIS No
71212
Format(s):
Hardcopy;Originator's fiche received by DSIS

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