近爆荷载作用下固支水背方板的变形挠度研究

摘要

将水背板在近爆荷载下的响应过程分为3个阶段,基于动量守恒原理,在一定简化条件的基础上推导了近爆荷载作用下固支水背方板的挠度近似计算方法.通过数值仿真方法,研究了板后液体对变形挠度的影响,结果表明,板后液体的存在减小了板的最大挠度,使板的变形呈现明显的局部效应.进一步对水背板在不同装药形状和爆距下的变形响应进行了仿真分析,将近似计算结果和仿真值进行了比较,结果在爆距较小的情况下,两者吻合较好.%The response process of clamped square plates subjected to a close-range explosion was divided into three stages.On the basis of a certain simplified conditions, an approximate calculation method for the deflection of clamped square plates subjected to the close-range explosion was given based on the principle of momentum conservation.Based on the numerical simulation method, the influence of water at the back of plate on the plate deflection was disscussed.The results show that, under the effect of water, the deflections of plates become smaller and the deformations of plates exhibit significant local effect.Further, the effects of charge shape and charge distance on the deflections of water back plates were also studied by the simulation method.The comparison results show that the approximate calculation results are in good agreement with the simulation's when the charge distance is small.