WAVE-CURRENT INTERACTIONS WITH THREE-DIMENSIONAL FLOATING BODIES  

作　　者：LIU Zhen TENG Bin NING De-zhi GOU Ying 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024,China [2]State Key Laboratory of Satellite Ocean Environment Dyamics, Hangzhou 310012, China

出　　处：《Journal of Hydrodynamics》2010年第2期229-240,共12页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10772040, 50709005 and 5092100);the Important National Science and Technology Specific Projects of China (Grant No. 2008ZX05026-02);the Open Fund of Stabe Key Laboratory of Sabllite Ocean Environment Dynamics (Grant No. SOED1002)

摘　　要：A Time-domain Higher-Order Boundary Element Method（THOBEM） is developed for simulating wave-current interactions with 3-D floating bodies.Through a Taylor series expansion and a perturbation procedure,the model is formulated to the first-order in the wave steepness and in the current velocity,respectively.The boundary value problem is decomposed into a steady double-body flow problem and an unsteady wave problem.Higher-order boundary integral equation methods are then used to solve the proposed problems with a fourth-order Runge-Kutta method for the time marching.An artificial damping layer is adopted to dissipate the scattering waves.Different from the other time-domain numerical models,which are often focused on the wave-current interaction with restrained bodies,the present model deals with a floating hemisphere.The numerical results of wave forces,wave run-up and body response are all in a close agreement with those obtained by frequency-domain methods.The proposed numerical model is further applied to investigate wave-current interactions with a floating body of complicated geometry.In this work,the regular and focused wave combined with current interacting with a truss-spar platform is investigated.A Time-domain Higher-Order Boundary Element Method（THOBEM） is developed for simulating wave-current interactions with 3-D floating bodies.Through a Taylor series expansion and a perturbation procedure,the model is formulated to the first-order in the wave steepness and in the current velocity,respectively.The boundary value problem is decomposed into a steady double-body flow problem and an unsteady wave problem.Higher-order boundary integral equation methods are then used to solve the proposed problems with a fourth-order Runge-Kutta method for the time marching.An artificial damping layer is adopted to dissipate the scattering waves.Different from the other time-domain numerical models,which are often focused on the wave-current interaction with restrained bodies,the present model deals with a floating hemisphere.The numerical results of wave forces,wave run-up and body response are all in a close agreement with those obtained by frequency-domain methods.The proposed numerical model is further applied to investigate wave-current interactions with a floating body of complicated geometry.In this work,the regular and focused wave combined with current interacting with a truss-spar platform is investigated.

关 键 词：wave-current interaction floating bodies time-domain simulation Time-domain Higher-Order Boundary Element Method（THOBEM） 

分 类 号：P315.3[天文地球—地震学] TM933[天文地球—固体地球物理学]