聚能射流对舰船舷侧结构的破坏毁伤研究

Damage research of shaped charge jet on warship broadside

本文基于AUTODYN软件的耦合欧拉-拉格朗日算法,模拟聚能装药起爆后形成聚能射流及侵彻舰船舷侧防护结构的过程。首先将聚能射流侵彻靶板的数值模拟结果和试验结果进行比较,以验证数值方法的有效性。在此基础上对聚能射流的形成及其对舷侧结构的毁伤过程进行模拟,并探讨液舱外板厚度及宽度对舷侧结构防护性能的影响。研究表明:聚能射流对舷侧防护结构的毁伤主要表现为舷侧外板的大面积塑性凹陷和内部舱壁的小尺寸破口,且增大液舱宽度会使聚能射流速度得到衰减。研究结果可为聚能射流载荷下舰船舷侧结构的防护设计提供参考。

Based on the algorithm of Coupled Eulerian Lagrangian(CEL), the processes of a shaped charge jet formation after the shaped charge explosion and its penetration into the warship broadside protective structure were simulated by AUTODYN. The numerical results were compared with the experimental results to validate the numerical method. The influence of the outer plate thickness and width of the liquid cabin on the protective performance was discussed. The numerical results show that the defensive bulkhead has the strongest defense capability against metal jet, and the defense capability of a liquid cabin is much better than that of a vacant cabin. Increasing the width of the liquid cabin can make the velocity of metal jet attenuate. The results can provide a reference for the design of the protective structure of warship broadside subjected to underwater explosion loading.