圆形舭部附近气泡与自由面非线性耦合研究  

Interaction between the bubbles and the free surface near the round bilge

作　　者：田昭丽[1,2] 刘云龙[1] 高利峰 

机构地区：[1]哈尔滨工程大学,哈尔滨150001 [2]武汉第二船舶设计研究所,武汉430205 [3]上海外高桥造船海洋工程设计有限公司,上海200137

出　　处：《振动与冲击》2016年第6期127-131,173,共6页Journal of Vibration and Shock

摘　　要：用气泡动力学边界元模型分析圆形舭部附近气泡与自由面非线性耦合作用。基于不可压缩势流理论建立水下爆炸气泡动力学数值模型;针对自由面与壁面交界点须同时满足壁面边界条件、自由面边界条件的过约束问题,采用节点拆分方法结合交界处约束条件对传统数值模型进行改进;用所建数值模型对已有研究成果进行拓展,分析攻角、爆距对气泡与自由面动态特性影响规律,初步讨论浮力影响,以期为舰船抗冲击设计、研究提供参考。The nonlinear interaction between the underwater explosion bubbles and the free surface near the round bilge was studied by using the bubble dynamics model based on the Boundary Element Method. Firstly, a numerical underwater explosion bubble dynamics model with the ideal and incompressible assumption was developed. Then, for the over-constrained problem caused by the intersection between the rigid wall and the free surface, the traditional numerical model was improved by using the double-node method to split each intersection node up to 2 parts while considering the continuity conditions. With the present model, the studies on the interaction between the bubbles and complex boundaries were extended. The influences of the attack angle, the initial distance of the charge, and the buoyancy of the dynamics of the bubbles and the free surface were analyzed, respectively. This work can serve as a reference to the anti-shock research and design of the warships.

关 键 词：水下爆炸 气泡动力学 圆形舭部 自由面 边界元 

分 类 号：O352[理学—流体力学]