圆形舭部附近气泡与自由面非线性耦合研究
田昭丽1,2,高利峰3,刘云龙1
1.武汉第二船舶设计研究所,武汉 430205;
2.上海外高桥造船海洋工程设计有限公司,上海 200137
Study on the interaction betweenthe bubble and the free surface nearby the round bilge
TIAN Zhao-li1,2,GAO Li-feng3,LIU Yun-long1
1.Wuhan 2nd Ship Research and Design Institute, Wuhan 430205, China;
2.Shanghai Waigaoqiao Shipbuilding & Offshore Engineering design Co., Ltd.,Shanghai 200137, China
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。
关键词 :
水下爆炸 ,
气泡动力学 ,
圆形舭部 ,
自由面 ,
边界元
Abstract :The nonlinear interaction between the underwater explosion bubble and the free surface nearby the round bilge is studied with the bubble dynamics model based on Boundary Element Method. Firstly, the numerical bubble dynamics model under the ideal and incompressible assumption is established in this paper. Then for the overconstrain problem caused by the intersection between the rigid wall and the free surface, the traditional numerical model is improved by introducing the double nodes method to split each intersection node up to2 parts and considering the continuity conditions. With the present model, the researches on the interaction between the bubble and complex boundaries are extended. The influences of the attack angle, the initial distance of the charge and the buoyancy on the bubble and free surface dynamics are analyzed respectively. The conclusion can provide references for the anti-shock research and design of the warships.
Key words :
underwater explosion
bubble dynamics
round bilge
free surface
boundary element method
收稿日期: 2015-01-13
出版日期: 2016-03-15
引用本文:
田昭丽1,2,高利峰3,刘云龙1. 圆形舭部附近气泡与自由面非线性耦合研究[J]. 振动与冲击, 2016, 35(6): 127-131.
TIAN Zhao-li1,2,GAO Li-feng3,LIU Yun-long1. Study on the interaction betweenthe bubble and the free surface nearby the round bilge. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(6): 127-131.
链接本文:
http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I6/127
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