The Research On Longitudinal Motion Of Planing Hull In Wave

The research of the hydrodynamics of the high performance marine vehicle is the hotspot for quite a long time. As a kind of the high performance marine vehicle, the research of the planing hull has been paid a lot of attention by the researchers.The hydrodynamics computation of the planing hull in the state of planing with a high speed is a hard problem in the field of hydrodynamics calculation of marine vehicle. This dissertation aims at the elementary research of the prediction of longitudinal motion performance of a planing hull which is planing forward with a constant high speed in waves and also search and basis for the accurate prediction method for seakeeping theory.The 2D strip method is adopted to numerically calculate the longitudinal motion performance of planing hull in regular waves of the paper.The hydrodynamic coefficients of every sections of the planing hull are calculated by source/dipole mixed-distribution method which is based on potential theory. The 2D strip method is used to predict the longitudinal motion performance of the planing hull. Put the hydrodynamic coefficients which is calculated by the potential theory into the ships'longitudinal motion equations ,and then we can get the results of the planing hull's longitudinal motionThe paper introduces experiment of the planing hull in the water tank and the spectral analysis method is used to analysis the seakeeping performance, then, deals with the experimental data for getting the curve of the corresponding of longitudinal motion.In this dissertation, the numerical results is compared with the experiments results from water tank, the feasibility of the numerical method which is used in the dissertation is verified and tested. and the direction for the depth research in the future is lied the foundation.