摘要
水下爆炸冲击波会使自由液面和结构附近的水域产生空化效应,引起的空化区域在闭合溃灭时会对结构产生较大的二次加载现象。文章理论分析了空化区域的形成,并用ABAQUS模拟计算了水下爆炸冲击波产生的空化区域的膨胀扩大、收缩溃灭过程,将模拟结果与实验值进行比较,结果表明,ABAQUS可以很好地模拟水下爆炸冲击波引起的空化现象,并验证了空化溃灭时对结构的二次加载作用是不可以忽略的。
Cavitation can occur in water area near the free surface and structure subjected to underwater shock. A high reloading pressure is generated when the cavitation region collapses. In this paper, the for-mation of cavitation region is analyzed in theory. The evolution and closure of cavitation region are numer-ically simulated by ABAQUS and compared with experimental values. The results show that cavitation can be simulated very well by ABAQUS and the secondary pressure produced in the fluid near the cavitation closure point is proved to be non-ignorable.
出处
《船舶力学》
EI
CSCD
北大核心
2014年第4期385-394,共10页
Journal of Ship Mechanics
基金
国家自然科学基金资助(50921001)
国家重点基础研究发展规划(973计划)(2010CB832704)
高技术船舶科研项目:半滑行复合前三体关键技术研究
辽宁省博士科研启动基金(20091012)
关键词
水下爆炸
数值模拟
空化效应
二次加载
underwater explosion
numerical simulation
cavitation
reloading
