浅水低频长波对海洋核动力平台动力响应的影响分析

Effect of Low Frequency Long Waves in Shallow Water on Dynamic Responses of the Marine Nuclear Power Platform

基于数值模拟和水池试验两种方法得到了波浪谱,采用短期预报方法,分析了平台在纵荡、垂荡和纵摇三个自由度上的波浪力和运动响应。对比计算结果表明,浅水低频长波对纵荡二阶波浪慢漂力和一阶运动响应,以及垂荡一阶波浪力和一阶运动响应影响较大,在水动力预报时需要重点考虑浅水低频长波对平台波浪力和运动响应造成的影响。该研究结果可为其他同类型船体计及浅水低频长波时提供参考。

The wave force and motion response of platform in three degrees of freedom,including surge,heave and pitch,were analyzed based on wave spectrum derived from numerical simulation and tank test and by adopting short-term forecasting method.Comparing the calculating results,it shows that the low frequency long waves play a great influence on the second order wave slow drift force and first order motion response in surge direction as well as the first order wave force and motion response in heave direction,which means that it should pay more attention to the effect of low frequency long waves in shallow water on the wave force and motion response in the process of hydrodynamic prediction.This article can provide a helpful reference for the same type ships when considering the low frequency long waves in shallow water.