水下非接触爆炸冲击下舱段模型的仿真分析

摘要

The local structures of warship may yield plastic deformation or get damaged subjected to underwater explo-sion (UNDEX) shock waves. In this paper, based on a cabin model, three new cabins are designed by separately increasing the thickness of bottom plate and the number of main frame and bottom keel. Numerical simulations of the four cabins sub-jected to UNDEX are carried out. The deformation of side plate and bottom plate, the maximum stress and acceleration of in-ner-bottom and decks are compared between four cabins. Simulation results indicate that on load case of this paper, increas-ing main frame number could decrease side plate deformation;increasing the thickness of bottom plate could enhance the protective performance of the cabin;increasing keel number could decrease bottom plate deformation, but increase deforma-tion of side plate, stress and acceleration of the upper decks.%水下非接触爆炸冲击波容易引起舰船局部结构的大变形或破损。本文以舱段模型为基础，分别修改外底板板厚、增加强肋骨和龙骨数量得到了3种新的舱段结构模型。使用ABAQUS软件对各舱段水下非接触爆炸冲击下的动态响应进行仿真计算，对外板塑性变形、内底及各层甲板应力和加速度峰值进行分析和对比。结果表明：在本文的工况下，增加强肋骨数量能明显减小舷侧塑性变形；增加外底板厚度能提高舱段底部抗冲击性能；增加龙骨数量能减少船底板变形，但会增加舷侧变形及各甲板应力和加速度。