敷设覆盖层圆板水下爆炸响应理论计算方法研究

为研究敷设覆盖层圆板水下爆炸响应,提出一种理论计算方法。敷设覆盖层对圆板水下爆炸响应影响包括两方面:一为对冲击载荷的影响,二为在冲击载荷作用下对响应的影响。该理论计算方法运用波在多层介质传播理论得到湿表面压力,并积分得到冲量,运用等效均一化理论得到覆盖层与钢板整体结构的等效参数,根据圆板振动理论得到圆板真空振动方程,通过考虑水附加质量的影响修正圆板振动频率,最后根据初始条件得到圆板的响应。将理论方法的结果与有限元结果通过实例进行对比,证明该理论计算方法可以很好地预测圆板振动的位移响应。

An Analytical Method for Response Prediction of Coated Circular Plates to Underwater Explosion

An analytical method is proposed to calculate the response of the coated circular plate subjected to underwater explosion. There are two effects on the response of the circular plate when the coating is laid. One is the effect on the impact load, the other is the effect on the response under the impact load. The analytical method employs the method of the wave propagating through multilayer mediums to calculate the pressure on the wetted surface and integrate the pressure to obtain the impulse. Then effective parameters of the system of the coating and the steel plate are obtained by the homogenization process. Finally, the response of the system is obtained given the initial conditions. Comparisons between the results obtained by the analytical method and the Finite element method indicate that the analytical method gives good approximations of the displacement response of the circular plate.