船体非线性波浪载荷的水弹性分析

HYDROELASTIC ANALYSIS OF NONLINEAR WAVE-INDUCED LOADS OF SHIP HULL

本文采用水弹性分析方法研究船舶在规则波及不规则波中迎浪航行时的结构动力响应（运动、剪力和弯矩等）。确定流体载荷时应用了扩展的切片理论，其中计及由于船体的非直舷、剖面吃水的瞬时变化和船体振荡的非简谐特性所导致的非线性，同时还考虑了波浪冲击、出水和上浪的影响。运动方程是在时域内步进求解。数值计算结果与规则波中的模型试验相比较，符合程度令人满意。

The hydroelastic analysis method is applied to investigate the structural responses (motions, shearing forces, bending moments etc. ) of ships travelling in regular and irregular head waves. A modified strip theory is proposed to describe the hydrodynamic forces,in which the non-linear effects arising from the non-vertical bow flare, the instantaneous variation of draft and the non-harmonic behaviour of sectional motions are included. The effects due to wave impact, bow emergence, and deck wetness are also considered. The equations of motion are solved in time domain by the st-y -step approach. The numerical predictions are compared with the model tests in regular waves. Satisfactory agreement is achieved.