舰船舷侧防护结构水下接触爆炸动响应分析研究

Analysis on Dynamic Response of Shipboard Protective Structure Subjected to Underwater Contact Explosion

舰船舷侧防护结构在接触爆炸载荷作用下的动响应问题是舰船抗爆抗冲击设计的重要组成部分。根据国外水面舰船防护结构形式,在某单层舷侧舰船模型基础上增设舷侧防护隔壁结构,并应用国际上通用的动力有限元程序ABAQUS对其进行水下接触爆炸系列数值仿真实验,考核舷侧防护结构对舰船抗爆抗冲击性能的影响。通过结果的对比分析发现,增设舷侧防护结构后较明显改善了船体外板的损伤情况,且防护隔壁仅发生了少量的塑性变形没有产生破口,从而达到了保护内部机舱等重要舱室的目的,并以防护结构双层隔舱内填充液体抗冲击性能最佳。

The dynamic response of shipboard protective structure subjected to contact explosion load is one of the important issues in the anti-detonation and anti-shock design of ship.Considering various protective structural configurations of foreign surface ships,a numerical simulation was carried out on the shipboard protective structure with additional bulkhead based on a mono hull ship model,utilizing the finite element package ABAQUS commonly used for dynamic analysis,and the impacts of the shipboard protective structure on the anti-detonation and anti-shock performance were investigated.The comparison results and analysis showed that the anti-shock performance of outer plate of hull with additional protection was significantly improved,in which no crevasses were found other than a few of plastic deformations occurred in the structure.This design can fulfill the protection requirement of the important inner spaces such as engine room from explosion loading,and it shows that the liquid-filled protective structure of double hull is the optimal configuration for anti-shock performance.