Frequency Response Analysis of Truss Spar by Considering the Viscous Damping
A calculation model for Truss Spars motion response is established under the wave action by combing the potential flow theory and the modified Morison equation. The high order boundary element method is used to acquire the wave exciting force and the relevant hydrodynamic information. By numerical simulation, the surge, heave and pitch RAOs are obtained, and the parameter analysis for influence of Morison drag coefficient on responses are conducted. The calculated results indicate that the surge and pitch motions are only sensitivity to the drag coefficient in the low frequency range, and consequently the viscous damping would play an important role when the platform undergoes 2nd order wave slow drift force. For the heave response, the heave plates installed on the Truss Spar provide large vertical viscous damping which distinctly affects the heave RAO.
Truss Spar Motion Frequency domain Wave Viscous damping
Gang Jun Zhai Xiao Jie Song Wei Diao Bin Bin Li
Dalian University of Technology,Dalian,116024,China Harbin Institute of Technology,Harbin,150090,China
国际会议
上海
英文
208-215
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）