Dynamic Response of Floating Body Subjected to Underwater Explosion Bubble and Generated Waves with 2D Numerical Model
Dynamic Response of Floating Body Subjected to Underwater Explosion Bubble and Generated Waves with 2D Numerical Model
复制标题
浮体对水下爆炸气泡和产生的波浪的动态响应二维数值模型
DOI：
10.31614/cmes.2019.04419
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Kang Youwei
中科院分区：
文献类型：
--
作者：
Tian Zhaoli;Liu Yunlong;Wang Shiping;Zhang A Man;Kang Youwei
水下爆炸气泡的低频载荷和产生的波浪会引起船舶的显著刚性运动，威胁其稳性。为了定性地研究流固耦合作用，基于势流理论，建立了二维水下爆炸气泡动力学模型，并采用双涡模型对气泡进行了双连通动力学模拟，气泡表现出与三维域相似的动力学特性。采用振型分解法建立了考虑浮体刚性运动的完全非线性流固耦合模型。通过模拟浮体在静水中的自由横摇运动，对模型进行了收敛试验。基于该模型对水下爆炸气泡、产生的波浪和浮体的相互作用进行了模拟，讨论了浮力参数和距离参数的影响。结果表明，近自由面水下爆炸气泡对浮体的冲击载荷可分为气泡脉动载荷、射流冲击载荷和产生的波浪冲击载荷3个分量，各分量的强度随浮力参数的变化呈非线性变化。气泡脉动载荷随水平距离的增加而衰减。然而，产生的波浪产生的冲击载荷并不随距离单调。在特定距离阈值内，它会随着距离的增加而增加，但之后会衰减。
The low frequency load of an underwater explosion bubble and the generated waves can cause significant rigid motion of a ship that threaten its stability. In order to study the fluid-structure interaction qualitatively, a two-dimensional underwater explosion bubble dynamics model, based on the potential flow theory, is established with a double-vortex model for the doubly connected bubble dynamics simulation, and the bubble shows similar dynamics to that in 3-dimensional domain. A fully nonlinear fluid-structure interaction model is established considering the rigid motion of the floating body using the mode-decomposition method. Convergence test of the model is implemented by simulating the free rolling motion of a floating body in still water. Through the simulation of the interaction of the underwater explosion bubble, the generated waves and the floating body based on the presented model, the influences of the buoyancy parameter and the distance parameter are discussed. It is found that the impact loads on floating body caused by underwater explosion bubble near the free surface can be divided into 3 components: bubble pulsation, jet impact, and slamming load of the generated waves, and the intensity of each component changes nonlinearly with the buoyance parameter. The bubble pulsation load decays with the increase in the horizontal distance. However, the impact load from the generated waves is not monotonous to distance. It increases with the distance within a particular distance threshold, but decays thereafter.
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影响因子：
3.4
作者：
Q. X. Wang;K. S. Yeo;B. Khoo;K. Lam
通讯作者：
Q. X. Wang;K. S. Yeo;B. Khoo;K. Lam
影响因子：
4.6
作者：
Liu Y. L.;Wang S. P.;Zhang A. M.
通讯作者：
Zhang A. M.
影响因子：
4.6
作者：
Q. Wang
通讯作者：
Q. Wang
影响因子：
2.8
作者：
C. Wang;B. Khoo;K. Yeo
通讯作者：
C. Wang;B. Khoo;K. Yeo
DOI：
10.1016/j.jcp.2015.03.049
发表时间：
2015-08
期刊：
J. Comput. Phys.
影响因子：
--
作者：
A. Zhang;Y. Liu
通讯作者：
A. Zhang;Y. Liu