水下爆炸气泡射流对壳板毁伤的计算方法  

Research on calculation method about damage of plate subjected to underwater explosion bubble jet

作　　者：岳永威[1] 孙龙泉[1] 王超[1] 崔杰[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《舰船科学技术》2012年第10期3-8,共6页Ship Science and Technology

基　　金：国家自然科学基金(51009035);国家自然科学基金(50939002);国家自然科学基金委员会-中国工程物理研究院联合基金(10976008);第十二届霍英东教育基金(121073);新世纪优秀人才支持计划(NCET-10-0054)资助项目

摘　　要：导出气泡射流速度及其与壁面作用周期的计算公式,并对舰船典型舱段进行了水下爆炸试验,探究典型工况下气泡射流对船体板架的毁伤效应与适用于工程计算的方法。结果表明,水下爆炸产生的气泡射流在船体局部产生的毁伤比冲击波更强,并且射流驻压是导致结构破坏的主要原因。导出的射流作用周期以及将射流载荷按正弦波形式处理的方法,具有一定的工程计算精度。数值计算与试验结果对比,估得典型工况下射流峰压值的量级,它与经验公式计算值相吻合。该方法可为相关的水下爆炸试验提供参考。Underwater explosion tests near a typical warship section are carried out with the load value and the period of fluid-structure interaction between bubble jet and the rigid wall deduced based on the empirical formula.Under typical conditions the jet impact is estimated by the proposed approach which is applicable for engineering projects.Result shows that the bubble jet can cause greater damage than the shock wave and the jet standing pressure is the main reason causing damage.In addition,the proposed approach is used to calculate interaction period and jet impact which is regarded as a sine-wave input and can meet the precision requirement of the engineering calculation about the underwater explosion.By the comparison of numerical calculation with experimental results,it shows that under typical conditions the measured value of jet peak pressure is accordant with that of through the calculation empirical formula,and this approach can provide a reference for the underwater explosion research.

关 键 词：水下爆炸 气泡射流 塑性变形 船体壳板 

分 类 号：U661.44[交通运输工程—船舶及航道工程]