摘要
研究了无限域流场中两端简支圆柱壳受球形炸药爆炸冲击载荷作用的响应特性。运用Hamilton变分原理,推导出了考虑流固耦合作用圆柱壳受水下爆炸冲击载荷作用的运动方程,并分别展开成Fourier级数的形式,最后在时域上差分离散,用Galerkin方法求解,得到了在水下爆炸冲击载荷下圆柱壳的响应分析。文章着重就圆柱壳在迎爆面和背爆面的不同位置的变形位移和变形速度进行了对比分析,同时还比较了流体动压力对结构响应的影响。并将分析结果与有限元计算软件MSC.DYTRAN计算结果比较,验证了算法的可靠性。
The dynamic response characteristics of a simply supported cylindrical shell which is located in the infinite water region subject to underwater explosive loading induced by spherical charges is investigated.The dynamic equations of the cylindrical shell subject to underwater explosion shock wave are derived using Hamilton variational principle,the fluid-structure interaction is taken into account.The equations are expressed using Fourier series form and discreted with finite difference in time domain,the dynamic responses are obtained using Galerkin method.Comparison between the response velocities and displacements at different points of the shell are performed in detail.Meanwhile,the effect of hydrodynamic pressure on the responses of the shell is discussed.The analysis results show the reliability of the proposed method compared with the solutions calculated with the finite element code MSC.DYTRAN.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第7期125-128,共4页
Journal of Vibration and Shock
