| NING Dezhi,SU Xiaojie,ZHAO Ming,TENG Bin. 2015. Numerical study of resonance induced by wave action on multiple rectangular boxes with narrow gaps. Acta Oceanologica Sinica, 34(5):92－102 |
| Numerical study of resonance induced by wave action on multiple rectangular boxes with narrow gaps |
| 波浪与带窄缝方箱作用共振现象的数值模拟 |
| Received:June 22, 2014 Revised:January 07, 2015 |
| DOI：10.1007/s13131-015-0672-1 |
| Key words:narrow gap resonance higher-order boundary element nonlinear numerical wave flume |
| 中文关键词: 窄缝 流体共振 高阶边界元 波浪数值水槽 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 51179028, 51222902 and 51221961; the New Century Excellent Talents in University of China under contract No. NCET-13-0076. |
| Author Name | Affiliation | E-mail | | NING Dezhi | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | dzning@dlut.edu.cn | | SU Xiaojie | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | | | ZHAO Ming | School of Computing, Engineering and Mathematics, University of Western Sydney, Penrith NSW 2751, Australia | | | TENG Bin | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China | |
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| Abstract: |
| By introducing a source term into the Laplace equation, a two-dimensional fully nonlinear time-domain numerical wave flume (NWF) is developed to investigate the resonance induced by the interaction between waves and multiple objects with narrow gaps. In the numerical model, the fully nonlinear kinematic and dynamic boundary conditions are satisfied on the instantaneous free surface and the constant artificial damping is employed in the gaps to approximate the viscous dissipation due to vortex motion and flow separation. The computational domain is discretized using a higher-order boundary element method (HOBEM). The proposed model is firstly validated against the published experimental data and numerical results of the wave height in the narrow gap between two boxes, the wave heights in the two gaps of three boxes, and wave loads on the boxes. Then, the extensive numerical experiments are performed to study the influences of the number of the boxes and the gap spacing on the resonant frequency, reflected and transmitted wave heights and wave loads on the boxes. |
| 中文摘要: |
| 针对波浪与带有窄缝多直角箱体结构作用产生的流体共振问题, 建立了基于域内源造波技术的二维时域完全非线性数值水槽。模型自由水面满足完全非线性运动学和动力学边界条件, 窄缝内引入常数人工阻尼模拟由于涡旋运动和流动分离引起的粘性耗散, 计算域采用高阶边界元方法进行离散。通过模拟双箱单缝, 三箱双缝的波面变化以及箱体所受波浪荷载, 并与已发表的实验和数值结果对比, 验证了本模型的准确性。同时通过大量的数值计算, 分析了箱体数量和窄缝位置对共振频率、波高以及反射波高、透射波高和箱体所受波浪荷载的影响。 |
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