冲击载荷形状对阻尼介质中结构最终塑性变形的影响

分析了在阻尼介质中当保持相关参量相同时，冲击载荷形状对简支刚塑性圆板和圆柱薄壳的最终塑性变形的影响。在结构物高载阶段的运动中，考虑了阻尼介质对塑性铰区移行的影响。结果表明:在阻尼介质中，文献［６］中相关参量的概念仍然可以沿用，但结构的最终塑性变形与相关参量的关系式Ｗ＿ｏｆ＝Ｉ￣２＿ｅＧ（Ｐ＿ｅ）应由更一般的表达式来代替。

EFFECTS OF THE PULSE SHAPE ON THE FINAL PLASTIC DEFORMATIONS OF BLAST LOADED STRUCTURES IN DAMPING MEDIUM

A theoretical model is developed for discussing the imfluence of blast characteris-tics on the final plastic deformation of structures in damping medium. The influences of dampingmedium on the motion of plastic hinge zone are considered in structural moving stage under highloading.It shows that the relationship between maximum final deformation of structures andYoungdahl's correlation parameters of loading[6],does not exist when dampingeffects are considered. However,the two parameters may still be used to eliminate the pulseshape effects for structures in damping medium.