舰艇舱室内爆毁伤的建模与仿真分析

Modeling and Simulation of Damage Effect of Ship Cabin Subject to Internal Explosion

半穿甲反舰导弹战斗部在舰艇舱室内部爆炸具有高效的毁伤能力。通过对舱室结构特性的分析,结合内爆热辐射和焊接对材料性能的影响,应用温度相关和应变率效应材料模型,采用流固耦合方法对舰艇舱室在爆炸荷载下的动态响应过程进行了数值模拟,分析了舱室内部的流场变化和内壁面爆炸荷载的分布情况,得到了舰艇舱室在爆炸冲击波作用下的响应特性和破坏机理。结果表明,舱内爆炸下,加筋结构的破坏方式为沿加筋部位发生局部剪切破坏,不会看到结构整体大变形;角隅部位是舰艇毁伤的薄弱部位,在爆炸荷载作用下舱室容易沿焊接影响部位发生撕裂。

Internal explosions make a great step forward in cabin damage efficiency with regard to semi-armor-piercing anti-ship missile warheads. Through analyzing of the characteristics of cabin structure and the influence of thermal radiation and welding, both temperature-dependent material properties and strain rate sensitivity were included in the numerical model. Fluid-solid coupled method was used to simulate the dynamic response of ship cabin subject to blast load. Explosion flowfields inside a cabin and blast load contour of panel were illustrated and dynamic response characteristic and failure mechanism of ship cabin under blast load was predicted. The results show that failure mode of stiffened plate localizes shear failure without large deformations along stiffener edges under explosion inside a cabin. The corners of cabin panels easy tear along welding area under blast load.