水下爆炸对船底结构毁伤效应的数值仿真

水下爆炸是毁伤舰船等水中航行器的一条重要途径,但是水下爆炸对船舶毁伤效应的试验操作复杂,理论分析也难于进行,因此应用数值仿真手段研究水下爆炸对目标的毁伤效应具有实际意义。大中型船舶均采用双层船底结构,在给定的装药量的作用下双层船底结构的破坏程度就成为了一个关注的重要问题。采用非线性动力学分析软件AUTODYN-3D研究了薄板在水下非接触爆炸作用下的力学响应并与实验进行了对比,验证了计算的合理有效。对舰船典型的双层船底结构建模,进行了水下爆炸对双层船底结构毁伤效应的数值仿真研究,给出不同的船底结构在水下爆炸作用下的响应特点。

Numerical simulation of damage effect to bottom construction subjected to underwater explosion

Underwater explosion is an important way to damage ships,but both experimentation and theory analysis to underwater explosion are difficult to carry, all these make numerical simulation a powerful tool to research underwater explosion effect. Given the mass of explosive, damage effect to the double bottom construction, which is always adopted in large ships, is deserved attention. Interactive non-linear dynamical analysis software AUTODYN-3D is employed to research dynamic response of thin plates subjected to underwater explosion. The results of simulation and experiments are compared to ensure the validity of simulation. Numerical simulation of damage effect to double bottom construction by underwater explosion is carried to research damage characteristics.