水下爆炸冲击平台数值仿真设计研究

Research on Numerical Simulations Design of Shock Resistance Flatform

摘要:

为研制水下爆炸冲击平台,初步设计平台隔振系统和两种船体结构,运用有限元分析软件ABAQUS,对安装隔振系统前后平台在爆炸载荷作用下的冲击响应进行计算分析,预估平台抗冲隔振效果。采用声固耦合方法,考虑空化效应和材料应变率的影响。仿真结果表明,在水下爆炸载荷作用下,采用加强的船体结构,平台船体底部的塑性变形显著减小,平台的垂向加速度峰值衰减率超过95%。经海上爆炸试验验证,数值仿真结果与试验值吻合良好,仿真设计方法合理。

Abstract:

In order to develop UNDEX shock resistance flatform, it was predesigned that the isolation system and two hull structure. Used the finite element analysis software ABAQUS to simulate the impulsion response of the flatform subjected to the explosion loading before and after vibration, predict of the anti-shock vibration isolation performance of flatform. This paper adopts acoustic structure coupling method, considering the influence of cavitation effects and material strain rate strengthen effect. Simulation results show that: the plastic deformation of hull bottom is significantly reduced and vertical acceleration peak decrement of hull above 95% in UNDEX via adopting the strengthen hull structure. The result of offshore explosion test verifies that the coincidence numerical simulations with test value is good, the simulation design is rational.