一定初缺陷杆在轴向冲击下弹塑性动态屈曲有限元计算  

FINITE ELEMENT CALCULATION ON ELASTIC-PLASTIC DYNAMIC BUCKLING OF A BAR WITH FINITE INITIAL IMPERFECTION UNDER AXIAL IMPACT

作　　者：揭敏[1] 

机构地区：[1]华中理工大学

出　　处：《爆炸与冲击》1991年第2期153-160,共8页Explosion and Shock Waves

摘　　要：本文用有限元方法分析了一定初缺陷杆受轴向冲击的弹塑性动态屈曲。由变形功相关的屈曲判据求出屈曲时间,计算了初缺陷及冲击载荷形状和大小对屈曲时间的影响。Using the finite element method, the dynamic buckling of a bar with finite initial imperfection under axial impact is analyzed in this paper. The buckling time is solved through a deformation work dependence buckling criterion. The effects of the shape and magnitude of initial imperfection and impact load on the bucklling time are also calculated.

关 键 词：杆 冲击 弹塑性 动态屈曲 有限元 

分 类 号：TU323.01[建筑科学—结构工程]