爆炸荷载作用下多排钢管结构的大变形响应  

Large Deformation Response of Multirow Steel Tubes Subjected to Blast Wave

作　　者：吴云泉[1] 许金余[1] 顾红军[2] 姚侃[1] 

机构地区：[1]西北工业大学,西安710072 [2]西安建筑科技大学,西安710055

出　　处：《应用力学学报》2006年第4期653-657,共5页Chinese Journal of Applied Mechanics

基　　金：空军重点科研资助项目

摘　　要：采用八塑性铰变形模态,对爆炸荷载作用下多排钢管的压扁运动场进行了描述。基于虚速度原理,建立了多排钢管动力压扁模态解方程。由拉格朗日第二类方程确立初始条件,用差分法求解出各层钢管结构的传递荷载和压扁量大变形响应。计及应变率效应和材料硬化效应,计算值与试验结果相符。结果表明,采用模态法求解多排钢管的大变形动响应是可行的。To investigate the plastic large deformation characteristics of multirow steel tubes subjected to blast wave,the eight-plastic-hinge framework is established and the displacement and velocity fields are described.Based on the virtual velocity principle,a modal method is employed to obtain a large deformation dynamic response.45g TNT exploding tests are carried out.The results coincide with the theoretical ones in view of the dynamic strain rate and strain hardening of material.

关 键 词：多排钢管 大变形响应 模态法 爆炸荷载 八塑性铰机构 

分 类 号：O347.1[理学—固体力学]