普通和恶劣海况下漂浮式风电场概念设计及平台动态响应

Concept Design and Dynamic Response of Floating Wind Turbine Platforms Under Normal and Severe Sea Conditions

为研究风、波浪、海流联合作用下漂浮式风电场平台的动态响应,建立了基于Barge平台的2×2阵列漂浮式风电场模型,根据辐射/绕射理论结合有限元方法,对比研究了单平台和多平台在普通海况和恶劣海况下的时频响应特性。结果表明:在普通海况下,多平台动态响应以低频为主;多平台在纵荡、垂荡和纵摇方向上的稳定性均高于单平台;在恶劣海况下,多平台运动响应主要集中在波频区;多平台在纵荡和纵摇方向上的稳定性较好,且越远离迎风浪侧,风电场平台的纵荡位移和纵摇角度越小。

To study the dynamic response of offshore floating wind turbine platforms under the combined disturbance of wind,wave and ocean currents,a model of 2×2 array floating wind farm was established based on the Barge platform,following which,the time-frequency response of the floating wind farm with a single platform or multi platforms was comparatively studied using radiation/diffraction theory and finite element method,under normal and severe sea conditions.Results show that the dynamic response of a multi-platform structure is mainly of the low frequency kind under normal sea condition.The multi-platform structure has a higher stability than the single-platform structure in surge,heave and pitch direction.Under severe sea conditions,the dynamic response of a multi-platform structure is mainly concentrated in the wave frequency region.For the multi-platform structure,the greater the distance away from the windward side,the smaller the surge and pitch angle will be.