圆柱壳在水下爆炸载荷作用下的动响应分析

摘要

主要研究了在无限水域中两端简支的圆柱壳受球形炸药爆炸冲击载荷作用下的动响应特性.首先,计及流-固耦合作用的影响,文中由Hamilton变分原理推导出了圆柱壳受爆炸载荷作用的控制方程.然后分别将位移函数的Fourier形式代入方程中,运用迦辽金方法进行化简,最后在时间域上使用四阶经典龙格-库塔方法,圆柱壳在某一时刻的动响应就可以得到.通过将计算结果与有限元计算软件MSC.DYTRAN的计算结果进行比较,可以证明文中计算结果的正确性和可靠性.%The dynamic response characteristic of a simply supported cylindrical shell which is located in the infinite water region subjected to underwater explosive loading induced by spherical charges is investigated in this paper. The equation of the cylindrical shell subjected to underwater explosion shock wave is derived from Hamilton variation principle, considering the fluid-structure interaction. Then the equation is expanded in Fourier series respectively, the dynamic response can be obtained using Galerkin method after being dispersed in time domain using 4-steps classical Ronge-Kutta technique. The computational results are proven to be reliable and correct by comparing with the solutions computed by the code MSC.DYTRAN.