Dynamic Response of Stepped Beams Under Impulsive Loading  

阶梯梁在脉冲载荷作用下的动态响应(英文)

作　　者：孙韬[1] 冯顺山[1] 

机构地区：[1]北京理工大学机电工程系,北京100081

出　　处：《Journal of Beijing Institute of Technology》1998年第3期233-239,共7页北京理工大学学报（英文版）

摘　　要：Aim To analyze dynamic failure of aerospace strutures subjected lateral impulsive loading. Methods Structures were modeled as rigid-perfectly plastic free-free stepped beams. Basic equations of motion un set up for analysis. Results Final pat deformation and rigid motion solutions were determined for a uniform impulsive loading. The critical rupture conditions for a space shuttle and a missile were obtained. Conclusion Failure is possible for aerospace structures under a uniform impulsive loading, but it is mere difficult in space.目的对空间结构在侧向脉冲载荷下的塑性破坏进行分析．方法将结构简化成刚塑性自由阶梯形梁，建立基本运动方程用以对结构进行分析．结果得到梁对应于均匀分布动载下的残余塑性变形及刚体运动解，给出航天飞机和某导弹临界断裂破坏的条件．结论自由梁形的空间结构在均布载荷下的破坏是可能的，但在空间要困难得多．

关 键 词：free-free stepped beam dynamic pulse plastic response 

分 类 号：TB12[理学—工程力学]