Dynamic behavior of high speed craft under irregular wave conditions

In the high speed craft, the study of dynamic behavior is important issue. Always, stability and performance improvements are the main principles of design of the high speed craft in sea wave conditions. The complexity of the equations of motion will be increased by increasing boat velocity under wave force. In this paper, the boats behavior with planing form is investigated against irregular wave conditions. Due to nonlinearity and complexity of dynamic behavior under wave excitations, many limitations are imported in the analytical and numerical calculations. For this purpose, in this study, the behaviors of high speed craft are discussed by given the assumption to simplify the problem. Therefore, at first the equations of motion are modeled in regular waves, and then these equations will be developed for irregular waves so that nonlinear nature of motions has been maintained.