浮式风机平台风浪流载荷动态响应研究

Dynamic research on the platform of floating wind turbine with wind wave current loads

为探究漂浮式风力机平台的动态响应,建立基于ITI Energy Barge平台的NREL 5MW漂浮式风力机模型。通过辐射衍射理论并结合有限元方法,考虑风、浪、流环境载荷的联合作用,对平台的动态响应进行数值模拟分析,得到了波激力和漂移力随波浪频率的变化及平台在纵荡、垂荡和纵摇方向上的动态响应。结果表明:平台在低频波浪时容易出现较大响应;波激力在数量级上远大于漂移力,且各自由度波浪力在低频波浪部分响应较大;极端海况下,驳船式平台在纵荡、垂荡和纵摇方向响应非常剧烈。

To research the dynamic response of floating wind turbine of the Barge platform,the machine models for ITI Energy Barge platform supporting the NREL 5MW wind turbine were built. By radiation / diffraction theory combined with the finite element method,considering the joint effects of wind,wave and flow,the numerical simulation analysis was carried out on the dynamic response of the platform to identify the change of wave exciting forces and drift force acting on the platform in the surge,heave and pitch direction on the dynamic response. The results showed that the platform was easy to appear larger response in low-frequency waves; the magnitude of wave exciting forces was much larger than that of drift force,low-frequency wave forces in degree of freedom was large; on the extreme offshore environment the Barge platform’s RAOs in the direction of surging,heaving and pitching were large.