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Simulation of Fully Nonlinear 3-D Numerical Wave Tank
作者姓名:张晓兔  滕斌  宁德志
作者单位:StateKeyLaboratoryofCoastalandOffshoreEngineering,DaliartUniversityofTechnology,Dalian116024,China
基金项目:ThisprojectissupportedbytheNationalNaturalScienceFoundationofChinaforDistinguishedYoungScholars(GrantNo .5 0 0 2 5 92 4 )andChinaPostdoctoralScienceFoundation (GrantNo .2 0 0 30 3435 9)
摘    要:A fully nonlinear numerical wave tank (NWT) has been simulated by use of a three-dimensional higher order bouodary element method (HOBEM) in the time domain. Within the frame of potential flow and the adoption of simply Rankine source, the resulting boundary integral equation is repeatedly solved at each time step and the fully nonlinear free surface boundary conditions are integrated with time to update its position and boundary values. A smooth technique is also adopted in order to eliminate the possible saw-tooth numerical instabilities. The incident wave at the uptank is given as theoretical wave in this paper. The outgoing waves are absorbed inside a damping zone by spatially varying artificial damping on the free surface at the wave tank end. The numerical results show that the NWT developed by these approaches has a high accuracy and good numerical stability.

关 键 词:仿真  数字模型  三维空间  积分方程  波动理论  阻尼  空间变换

Simulation of Fully Nonlinear 3-D Numerical Wave Tank
ZHANG Xiao-tu,TENG Bin and NING De-zhi State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian ,China.Simulation of Fully Nonlinear 3-D Numerical Wave Tank[J].China Ocean Engineering,2004,18(1):59-68.
Authors:ZHANG Xiao-tu  TENG Bin and NING De-zhi State Key Laboratory of Coastal and Offshore Engineering  Dalian University of Technology  Dalian  China
Institution:ZHANG Xiao-tu,TENG Bin 1 and NING De-zhi State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China
Abstract:A fully nonlinear numerical wave tank (NWT) has been simulated by use of a three-dimensional higher order boundary element method (HOBEM) in the time domain. Within the frame of potential flow and the adoption of simply Rankine source, the resulting boundary integral equation is repeatedly solved at each time step and the fully nonlinear free surface boundary conditions are integrated with time to update its position and boundary values. A smooth technique is also adopted in order to eliminate the possible saw-tooth numerical instabilities. The incident wave at the uptank is given as theoretical wave in this paper. The outgoing waves are absorbed inside a damping zone by spatially varying artificial damping on the free surface at the wave tank end. The numerical results show that the NWT developed by these approaches has a high accuracy and good numerical stability.
Keywords:numerical wave tank  full nonlinearity  higher order boundary element method  three-dimensional time domain  
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