水下接触爆炸作用下加筋板的动态响应分析

Research on Dynamic Responses of Stiffened-plate under Underwater Osculatory Explosion

主要仿真模拟计算了加筋板结构在水下接触爆炸荷载作用下的动力响应。以加筋板模型为研究对象,建立了平板、井字加筋板、十字加筋板三种模型。利用非线性有限元程序LS-DYNA,分别模拟计算出它们在水下接触爆炸荷载作用下的动力响应。分析了各个模型计算结果,对比了位移、等效应力、压力等变量,得出结论:加筋板具有分散爆炸冲击波的作用,加筋板抵抗爆炸冲击波冲击的能力更强,结构更偏于安全。

Dynamic responses of stiffened-plate under the underwater osculatory explosion were mainly discussed. Three different models of plate were created including a fiat plate model and two stiffened-plate models. Dynamic responses of the three models under the underwater osculatory explosion were calculated by the nonlinear finite element program LS-DYNA. By analyzing the calculated results and contrasting some variables such as displacement, equivalent stress and pressure, it is concluded the stiffened-plate can effectively disperse the shockwave of the explosion and also has better capacity of resisting explosion. The stiffened-plate structure is safer. Key words： stiffened-plate; underwater osculatory explosion; dynamic response; numerical simulation