船舶在波浪中脉动压力预报的三维方法

船体表面的脉动压力预报对于船体结构有限元分析和可靠性分析是十分重要的。预报船舶运动响应、水动压力和剖面载荷的传统做法是采用切片理论，该理论对常规细长船舶的运动响应和剖面波浪载荷能给出较好的预报结果，但对船体表面脉动压力的预报，却因没有充分考虑三维效应而与船模试验结果出入较大。本文通过引入“高频低速”假定，基于三维线性势流理论，用三维源汇分布法在频域内求解非定常流场，进而计算船舶在规则波中运动、波浪载荷和脉动压力响应。对集装箱船FLOKSTRA的计算结果表明：与切片法相比，本方法计算的脉动压力响应与船模试验结果符合较好。

Three_dimensional Method for Prediction of Oscillating Pressure on Ship in Waves

Prediction of oscillating pressure on a ship surface is very important for Finite Element analysis and Reliability Analysis of ship structures. The traditional way of predicting ship motion , pressure and wave loads is the use of Strip Theory to give better motion responses and wave loads for conventional slender ships. But the predicted pressure is not quite in agreement with the experiment results obtained with model ships for neglecting the three-dimensional effect.The motion responses,wave loads and pressure of ships in waves are obtained by assuming high encouter frequency and low forward speed,and solving the unsteady fluid field by using a 3D theory in the frequency domain. The results of computation for Flokstra container ship show that the 3D method proposed gives better pressure distribution than the Strip Theory.