摘要
基于Wu建立的带航速三维水弹性理论,采用考虑自由液面效应的理想可压流体Green函数,提出了带航速和考虑自由液面的声介质中三维水弹性结构声辐射计算方法。对THAFTS三维水弹性计算程序进行修改,得到声介质中三维水弹性计算程序。针对无限大流体中的静态弹性球壳结构声辐射模型进行一系列数值计算,通过与解析结果的比较,验证了该计算方法和计算程序的正确性。进一步计算不同潜深、不同航速下弹性球壳的结构声辐射,以此为基础对该计算方法和计算程序进行进一步考核,同时分析了航速和自由液面对水下结构声辐射的影响。
Based on Wu theory on 3-D hydroelasticity of floating bodies with forward speed, the structural- acoustic radiation calculated method of 3-D hydroelasticity with free surface is proposed by utilizing Green function in ideal compressible fluid related to free surface. The existent 3-D hydroelasticity programme, THAFTS, is renewed. The validity of the calculated method and programme is checked by comparing with analytic results, based on a number of numerical calculation about structural-acoustic model of a static elastic spheric shell in infinite fluid domain. The structural-acoustic radiation of spheric shell under conditions of different dived depths and different forward speeds are calculated further. On that basis, the further verification of the calculated method and programme, and the analysis of the effects of forward speed and free surface on underwater structural acoustic radiation are made.
出处
《船舶力学》
EI
北大核心
2010年第11期1304-1311,共8页
Journal of Ship Mechanics
关键词
水弹性力学
声介质
自由液面
航速
球壳
hydroelasticity
acoustic medium
free surface
forward speed
spheric shell
