战斗部近炸下防护液舱破坏机理分析

Analysis of failure mechanism on protective liquid cabin under warhead close explosion

为研究大型舰船水下舷侧防护液舱的破坏机理,根据液舱的承载特性,设计制作缩尺战斗部模型和敞口、密闭两种液舱结构模型,开展两种姿态战斗部近炸下高速破片和冲击波对防护液舱的联合毁伤试验。根据试验后液舱模型的破损情况分析液舱前、后板在典型载荷下的破坏机理,总结分析液舱结构整体的破坏模式和破坏机理。结果表明:高速破片是防护液舱结构的主要防御对象,破片开坑和空化阶段是液舱结构变形破坏的主要阶段,破片群侵彻液舱形成的激波载荷和空化效应引起的挤压载荷是使结构产生变形破坏的主要冲击载荷。

In order to study the failure mechanism of large warship broadside protective liquid cabin,the scaled model of warhead and two kinds of liquid cabin structure,including exposure model and airtight model,were designed based on the bearing characteristics of the liquid cabin. The combined damage experiment of high-velocity fragment and shock wave under warhead close explosion,including two kinds of posture,were performed. According to the damage of liquid cabin model after test,the failure mechanism of front plate and back plate of liquid cabin under typical load was analyzed,and the failure mode and mechanism of liquid cabin structure was summarized and analyzed. The result shows that the high-velocity fragment is the main defensive object of protective liquid cabin,the drag and cavitation of fragment are the main stage of liquid cabin deformation and fracture,and the shock wave and cavitation squeezing pressure caused by penetration of fragment cluster into liquid cabin structure are the major load,which make structure deform and damage.