弹塑性球形薄壳在冲击载荷作用下的动力分析

通过曲面弯曲的等度量变换，给出了受冲击球壳的变形模态；接着，分别假定材料力弹性或刚塑性，基地能量守恒，得到了壳本和撞击体在运动过程中控制方程；最后，对所得到的控制方程进行了数值求工与实验数据作了比较，发展二者具有较好的一致性。

DYNAMIC ANALYSIS OF ELASTIC PLASTIC THIN SPHERICAL SHELLS UNDER IMPACT

This paper presents a theoretical analysis of dynamic process of elastic plastic thin sphcrical shell under impact. Firstly, the deformation model of the impacted spherical shell is given by introducing the isometrical transformation of surface bending. Secondly, based on the conservation of energy, the correponding governing equation of motion for the shell and the missile is obtained by assuming the material of the shell is linear elastic or rigid plastic. Finally, the governing equaitons are solved by numerical method, and a comparion made between the theoretical results and the experimental ones indicates that the two groups of results are in better conformity with each other. The results of this paper are of important value referrred to engineering design.