摘要
本文用结构有限元与流体边界元方法研究了空间复合材料加筋板结构的流固耦合自由振动，推导了用于结构分析的分项插值型复合材料八节点板单元和三节点梁单元，以及用于流场分析的线性边界单元。用修正的RIRZ向量法与波前法相结合的方法求解特征值问题，避免了因附连水质量引起的结构质量矩阵为满阵的内存困难和非对称矩阵方程约化困难。算例表明，附连水质量对复合材料结构的动力特性影响要比各向同性材料严重得多。
The fluid-structure coupled vibmtion of stiffened laminated composite plates is investigated by using finite element and boundary element methods-.The isoparametric composite plate and beam elements are formulated. The modified RITZ vector approach, which isefficient for investigating fluid-structure coupled vibration problems, is employed to calculate eigenvalues and eigenvectors. The numerical results obtained indicilte that the added mass has more significant effect on dynamic characteristics of composite structures than that of isotropic structures.
出处
《中国造船》
EI
CSCD
北大核心
1994年第3期50-59,共10页
Shipbuilding of China
基金
船舶工业国防科技应用基础研究基金
关键词
复合材料
增强结构
流固耦合振动
Composite reinforced structure, Fluid-structure coupled vibration, Finite element method, Boundary element method
