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中文摘要：
通过数值模拟的方法研究Spar平台两自由度涡激运动,建立考虑流固耦合时Spar平台涡激运动时域数值模型,采用Matlab软件编程计算了Spar平台在不同流速下的两自由度涡激运动响应,并比较了Spar平台涡激运动时非线性阻尼对于结构的影响。通过对数值模型模拟结果的比较发现,非线性阻尼能降低Spar平台两向涡激运动响应的计算结果,尤其是当平台发生共振时,这个影响更为显著。
英文摘要：
The vortex-induced motion in two directions of Spar was investigated through numerical simulation.Different time-domain numerical models of Spar＇s vortex-induced motion considering the fluid-structure interaction were established.The responses,in two directions,of Spar＇s vortex-induced motion were calculated using Matlab.In addition,the effect of nonlinear damping caused by vortex-induced motion was discussed.Through comparing the calculated results from different models,it can be concluded that the nonlinear damping can reduce the calculated responses of vortex-induced motion in two directions,especially when the resonance occurs.
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