近距非接触水下爆炸舰船动态响应的数值模拟

运用通用有限元程序ABAQUS对某型水面舰艇在水下爆炸冲击波作用下的动态响应进行了数值模拟,有效地解决了ABAQUS计算近场水下爆炸时单元破损和单元失效等问题,计算出了某型舰艇水下爆炸的冲击响应结果,获得了船体的应力响应、局部变形、加速度响应和速度响应4个方面的响应规律,并得出以下结论:在全船范围内,加速度和速度总是由下至上逐渐减小,离爆点最近的区域差距最为明显;船体上离爆点最近的区域应力是最大的,不同甲板在相同位置处的应力是不同的。数值模拟所得的舰艇在水下爆炸作用下的响应规律与实际分析规律相符,为舰艇抗爆、抗冲击的结构设计提供了依据。

THE NUMERICAL SIMULATION OF DYNAMIC RESPONSE OF WARSHIP BY NON-CONTACT UNDERWATER EXPLOSION IN CLOSE DISTANCE

The dynamic response of a warship has been simulated by the general finite element program ABAQUS,the problems such as element damaged and failure were effectively solved by ABAQUS when the underwater explosion was in close distance,the results of the response were obtained.The laws of stress response of the hull,local deformation,the acceleration response and the speed response of the hull were revealed.In conclusion,acceleration and velocity were always gradually decreasing from the bottom up,and the disparity of that in the nearest area from explosion point was the most obvious.The stress of the nearest area from explosion point of the ship was maximal,and the stress on the same place of different decks was different.The calculation results from numerical simulation corresponded to actual analysis,and it could provide evidence for warship structure design.