Fully nonlinear 3D interaction of bubble dynamics and a submerged or floating structure |
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| Institution: | 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116023, China;2. School of Naval Architecture, Dalian University of Technology, Dalian 116023, China;1. Marine Design & Research Institute of China, Shanghai, China;2. Harbin Engineering University, Harbin, China;1. Department of Marine Mechanical Engineering, ROC Naval Academy, Taiwan, ROC;2. Department of Mechanical and Automation Engineering, Da-Yeh University, Changhua, Taiwan, ROC;3. Hsiuping University of Science and Technology, Taichung, Taiwan, ROC;1. Department of Aerospace and System Engineering, Gyeongsang National University, Jinju 660701, South Korea;2. Department of Mechanical Engineering, Urmia University of Technology, 5716693187 Urmia, Iran;3. Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada;1. College of Shipbuilding and Engineering, Harbin Engineering University, Harbin 150001, China;2. Wuhan 2nd Ship Design and Research Institute, Wuhan 430064, China |
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| Abstract: | This paper is concerned with the interaction of bubbles, a submerged or floating structure, and free surface waves. A three-dimensional fully nonlinear model has been developed based on the coupling of the boundary integral method (BIM) for bubble dynamics and free surface waves and the finite element method for structure deformation. The present method is well validated by comparing the numerical results with the experimental data. Three structure characteristics, including fixed, rigidly moving and flexible, are investigated separately to determine their influence on bubble dynamics. For a free-floating structure, the free surface causes not only a larger reduction in peak pressure for a rigid structure compared with a fixed body but also the modification of the bubble period and structural response. The interaction between a bubble and a flexible structure, in the absence of a free surface, is simulated. Both the rigid motion and the deformation at the local structure appear in the simulation. The effect of the structural thickness on the reduction in peak pressure is also considered. |
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| Keywords: | Submerged or floating structure Fully coupled fluid–structure modelling Boundary integral method |
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