摘要
研究置于不可压缩、理想流体液面上无限长圆柱壳在受水下冲击载荷作用下的塑性动力屈曲问题．根据流固耦合条件，导出了圆环大挠度动力屈曲控制方程，并由广义Ｌａｇｒａｎｇｅ方程得到在液流场作用下的大挠度基本内凹运动方程．采用四阶Ｒｕｎｇｅ－Ｋｕｔａ方法求解方程，按Ｌｉｎｄｂｅｒｇ初缺陷放大准则进行模态分析．最后得到主屈曲模态数和临界冲击速度．
This paper is concerned in the dynamic plastic buckling of infinite length cylindrical shell which is rested on incompressible ideal fluid and subjected to underwater impulsive loads. The dynamic buckling governing equation of rings with finite deformation is derived from the fluid solid coupling motion and the basic equation for inward radial motion with the effect of potential fluid field is derived from the extended Lagrange equation. The equations are solved by fourth order Runge Kutta integration method, and the buckling mode analysis is made in terms of Lindberg's initial imperfect amplification criterion. Finally, the dominant buckling mode number and the critical velocity of cylindrical shells are obtained.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
1996年第10期86-91,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金
关键词
圆柱壳
冲击载荷
流固耦合
塑性动力屈曲
cylindrical shell
impulsive loading
fluid solid coupling
dynamic plastic buckling
