舰船近场爆炸反射波对气泡射流特性影响  

Characteristics of a bubble jet under a near-ship field explosion reflected shockwave

作　　者：倪宝玉[1] 张阿漫[1] 朱枫[1] 吴巧瑞[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：《哈尔滨工程大学学报》2011年第8期976-983,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金-中国工程物理研究院联合基金资助项目(10976008);国家自然科学基金重点资助项目(50939002);黑龙江省自然科学基金资助项目(A200901;E201047)

摘　　要：水下爆炸冲击波遇到物面(如船底表面、海底等)将产生反射冲击波,对于近场爆炸,由于爆炸形成的气泡距离物面较近,气泡在运动过程中将遭遇物面反射冲击波.为了探讨反射冲击波对水下爆炸气泡特性的影响,假设冲击前期惯性力起主要作用,依据理想流体势流理论,建立了反射波作用下气泡运动模型,并采用边界积分法求解.在此基础上,给出了舰船近场爆炸反射波作用下气泡的射流特性.研究表明:反射波对气泡动态特性影响不大,在舰船冲击响应分析载荷输入时,可单独考虑冲击波载荷和气泡载荷对舰艇结构的耦合损伤作用,而无需考虑二者之间的相互作用.An underwater explosion shockwave will be reflected when it encounters a body surface such as the seabed or a hull bottom during its propagation.In this way,the underwater explosion bubble will be affected by the reflected shockwave in its motion for a near-ship field explosion.In order to study this influence,the dynamic response of a bubble to an underwater reflected shockwave was simulated by using the boundary integral method with the assumption that the early response was mainly inertia controlled.Based on the potential flow theory,a dynamic model of the bubble was established,the boundary integral method was applied for solution.On basis of this,the jet characteristics of bubble under the action of the reflected shockwave were studied.Through study,it was found that the influence of a reflected shockwave on bubble dynamics is so weak that only two separate shockwaves and bubble loads,without interaction,need to be provided as input for warship shock response analysis.

关 键 词：水下爆炸 反射波 气泡射流 边界积分法 

分 类 号：U661.6[交通运输工程—船舶及航道工程] O382.1[交通运输工程—船舶与海洋工程]