圆柱壳轴向冲击屈曲数值仿真及其应力波效应分析  

Numerrical Simulation on Dynamic Buckling of Cylindrical Shells Subjected to Axial Impact and the Analysis of the Stress Wave Effect

作　　者：杨卫奇[1] 张善元[1] 路国运[1] 刘志芳[1] 

机构地区：[1]太原理工大学应用力学与生物医学工程研究所,太原030024

出　　处：《科学技术与工程》2008年第23期6204-6208,6223,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(10772129)资助

摘　　要：采用LS-DYNA对刚体质量轴向撞击圆柱壳动力屈曲全过程进行了数值模拟,给出了不同时刻的屈曲模态、应变分布和撞击力时程曲线,分析了壳的几何物理参数及撞击加载条件对屈曲行为的影响,同时分析了屈曲过程中的横向惯性效应和应力波效应。Whole process for the axisymmetric buckling of elastic-plastic cylindrical shells subujected to axial impact is numerically studied using LS-DYNA computer code. The buckling shape and strain distribution in different time and force-time history in different loading condition are given. It is found that the development of the buckling shape depends on the material property and the geometry of the shell and impact condition. Particular attention is paid to the influence of stress wave propagation and transverse inertia of the shell on initiation of buckling.

关 键 词：弹塑性圆柱壳 动力塑性屈曲 动力渐进屈曲 应力波效应 

分 类 号：O344.3[理学—固体力学]