水下爆炸冲击波载荷作用下船底板架的塑性动力响应

为研究水面舰船结构抗水下爆炸的能力,建立了典型水面舰艇底部板架结构在水下爆炸冲击波作用下的塑性动力响应计算模型.模型以能量法为基础,将底部板架的响应过程分成整体变形和局部变形2个部分,根据两者的不同特点,分别采用骨架梁模型和固支矩形板模型进行计算,并引入能量分配机制,对两者所吸收的能量进行分配.为验证理论模型,建立了船底板板架的有限元模型,采用MSC.Dytran进行数值模拟,结果吻合较好.该计算模型可为水面舰艇船体典型结构抗冲击性能评估提供一定的依据.

Plastic dynamic response of ship hull grillage to underwater blast loading

To investigate the anti-shock capacity of warships,a plastic dynamic response model of ship hull grillage subjected to underwater blast loading was established using the energy method.The response of hull grillage was divided into two parts: total deformation and local deformation.To calculate the maximum deflection of hull grillage,a framework beam model and a clamped squared plate model were derived separately,and an energy distribution mechanism was also introduced.To verify this method,an FEM model for ship hull grillage was built,and a numerical solution derived using MSC.Dytran software.Simulation results agreed well with theoretical predictions,showing that this method is feasible and can be used to evaluate the anti-shock capacity of warships.