摘要
水下结构的自振特性不仅受流体动压力的影响 ,还受不同水深下的静水压力的影响。本文假设水为无粘、不可压、无旋流体 ,通过附连水质量解耦 ,用考虑初应力刚度的有限元方法计算了圆柱壳在不同水深下的自振特性 ,初步揭示了这种影响 。
The vibration characteristics of submarine structures are influenced not only by fluid dynamic pressure but also by static water pressure corresponding to different depth. In this paper, water is assumed to be irrotational, non-viscous and uncompressible. The fluid-solid Interaction equations are uncoupled via added water matrix. In terms of initial stress stiffness, the vibration characteristics of a cylindrical shell model under different water depth are calculated by FEM, and the effects of water depth are primarily uncovered. The results and method are of some reference values to the studies on fluid-solid interaction.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2001年第3期344-346,361,共4页
Journal of Mechanical Strength
基金
航天部资助项目 (971 0 32 4 5)~~
关键词
水下结构
流固耦合
自由振动
附连水质量
初应力刚度
圆柱壳
静水压力
Submarine structures
Fluid solid interaction
Free vibration
Added water mass
Initial stress stiffness
Cylindrical shell
