壁面与自由面边界联合作用下的水下爆炸冲击空化特性研究  

Investigation of Underwater Explosion Shock Wave and Cavitation Characteristics under Combined Action of Rigid Wall and Free Surface

作　　者：武文斌 廉朝旭 雷云涛 WU Wenbin;LIAN Zhaoxu;LEI Yuntao(College of Engineering,Ocean University of China,Qingdao 266404,China;College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]中国海洋大学工程学院,青岛266404 [2]北京大学工学院,北京100871

出　　处：《中国造船》2024年第5期233-247,共15页Shipbuilding of China

基　　金：国家自然科学基金项目(52471304);山东省泰山学者(青年专家)项目(tsqn202306110)。

摘　　要：水下爆炸载荷包含冲击波、气泡和空化等多种形式,其特性受边界条件影响,相关机理尚未完全揭示。论文针对倾斜壁面近水面流域的水下爆炸问题,建立了二维流域间断伽辽金冲击载荷计算模型,分析入射冲击载荷在倾斜壁面与自由面交界流域中反射波的特性,定性研究壁面倾角对爆炸载荷和空化的影响。研究表明,在壁面与自由面边界联合作用下,入射冲击波在壁面处形成的反射波会使自由面片空化区域迅速坍塌,在坍塌阶段呈现间断的形态特征。The underwater explosion loading includes various types,such as shock waves,bubbles,cavitation,etc.However,the related mechanisms have not been well understood.A two-dimensional discontinuous Galerkin model is established for the underwater explosion near the inclined wall and free surface,The reflection waves are analyzed under the combined action of the wall and free surface.The influence of the inclined angle of the wall on the explosion loading and cavitation characteristics is investigated qualitatively.The results show that under the combined action of the wall and free surface,the pressure wave reflected by the wall makes the whole bulk cavitation zone split into smaller zones rapidly.The cavitation zone appears discontinuous morphological features during the collapse phase.

关 键 词：水下爆炸 间断伽辽金方法 壁面与自由面联合作用 冲击载荷 空化特性 

分 类 号：U661.1[交通运输工程—船舶及航道工程]