金属圆柱壳参数变化对缓冲吸能的影响

Influence of Parameters Variation of Metallic Cylindrical Shell on Its Buffering-absorption Effect

根据能量守恒以及角度增量叠缩法研究得到了圆柱壳在采用不同的材料以及不同几何参数时的冲击块的速度位移曲线、圆柱壳的载荷以及瞬时载荷位移历程曲线,计算结果说明改变圆柱壳的材料以及几何参数可以确定合理的平均载荷以及瞬时载荷位移历程曲线,还可以通过增加圆柱壳的数量减少圆柱壳在塑性变形叠缩过程中的垂直位移。

Using energy conservation law and the increment method of angle fold, the velocity-displacement curve of the impacting body, mean load-displacement curve and the instantaneous load-displacement curve of a metallic cylindrical shell in impact process were obtained for different materials and different geometrical parameters of the shell structures. Computation results show that the reasonable mean load-displacement curve and the instantaneous load-displacement curve can be determined by adjusting the material and the geometrical parameters of the cylindrical shell, and the vertical fold displacement in the impact process can be reduced by increasing the number of the cylindrical shells.