水面浮体结构底部水下爆炸气泡崩溃射流试验研究  

Experimental investigation on water-jets resulting from bubble collapse of underwater explosion under surface floating structures

作　　者：汪俊[1,2] 王海坤 唐家炜[1,2] 张国平 徐良浩 伍星星[1,2] WANG Jun;WANG Hai-kun;TANG Jia-wei;ZHANG Guo-ping;XU Liang-hao;WU Xing-xing(China Ship Scientific Research Center,Wuxi 214082,China;Taihu Laboratory of Deepsea Technological Science,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室,江苏无锡214082

出　　处：《船舶力学》2022年第9期1395-1407,共13页Journal of Ship Mechanics

基　　金：国防基础科研项目(B0820132045);军科委某重点项目。

摘　　要：本文通过开展不同尺度的水面浮体结构水下爆炸气泡射流试验,研究水面浮体结构尺寸与底部方位爆炸时发生水射流的关系,开展细长型水面浮体结构底部爆炸时,距径比(爆距与气泡的最大半径之比)在0.2~1.4范围内冲击波、气泡脉动及水射流载荷下结构的加速度、应变响应研究,并采用高速摄像机观测爆炸气泡与结构的相互作用过程,同时采用粒子图像测速仪(PIV)测量得到了典型工况下水射流产生的速度。试验结果表明,底部方向产生射流的条件不仅与距径比相关,而且还与水面浮体结构排水体积的等效半径与爆炸气泡的最大半径的比值相关。Experiments of different sizes of floating structures subject to underwater explosions were presented in this paper.The acceleration and strain response of structures under the loading of shock wave,bubble pulse and water jet were investigated withγs(the ratio of distance between bubble center and structure to the bubble maximum radius)varying from 0.2 to 1.4.High-speed video camera was employed for observation of the interaction between the bubble and structures,and PIV method was also used to measure the speed of water jet for typical cases.The results show that the condition of water jet occurrence is related not only to the distance parameter,but also to the ratio of the structure displacement equivalent radius to the max radius of the explosion bubble.

关 键 词：水下爆炸 浮体结构 气泡崩溃 水射流 PIV技术 

分 类 号：U663.2[交通运输工程—船舶及航道工程]