组合柱壳在流场中受冲击载荷作用动响应分析

基于水弹性理论和广义变分原理建立流固耦合系统动响应方程．用双渐近法建立流固耦合边界积分方程．采用结构有限元和流体边界元计算了组合柱壳在流场中受冲击载荷作用下的动响应．

The Dynamic Response of Combination Cylindrical Shell in Fluid Field Subjected to Impulsive loads

An analytical study on dynamic response of a finite, stiffened combination cylindrical shell in fluid field subjected to impulsive loads is presented. The stiffened combination cylindrical shell is frequently encountered in aerospace architecture and ocean engineering structure. Under the action of driving force applied in radial, tangential or longitudinal direction on the shell, vibration and noise are excited, about which scholars of mechanics are concerned. The dynamic response equation of the fluid structure interaction system is derived based on the hydroelasticity theory of shell and principle of generalized variation. The boundary integral equation of the fluid structure interaction system is carried out by doubly asymptotic approximation. The dynamic response of a combination cylindrical shell in fluid field subjected to impulsive loads is investigated with the structure finite element and fluid boundary element. Finally the results of calculation are discussed.