环境荷载联合作用下近海单桩风机振动特性研究  

Investigation on Dynamic Responses of Offshore Wind Turbines with Single Pile Subjected to Environmental Loading

作　　者：张慧敏 孔凡 陈波[1] ZHANG Hui-ming;KONG Fan;CHEN Bo(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;School of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《武汉理工大学学报》2022年第4期57-63,共7页Journal of Wuhan University of Technology

摘　　要：以美国国家可再生能源实验室(National Renewable Energy Laboratory,NREL)的5MW海上单桩风力发电机为研究对象,研究了环境荷载作用下近海单桩风机的振动特性问题。首先基于Jonswap谱分析法建立了海上风机所受的随机波浪力模型。采用Morison方程计算近海单桩风力机的波浪力,利用谱表现法模拟出满足相应波谱的波浪时程样本。基于Kaimal湍流谱模型模拟了风机的脉动风荷载,利用叶素动量理论确定了风机气动荷载。考虑了风机所受的土壤作用力并给出了土壤效应的分析计算方法。结果表明,环境荷载作用下近海单桩风机动力响应复杂,必须充分考虑风、浪、土壤等多种效应的影响。The 5-MW baseline wind turbine model proposed by the National Renewable Energy Laboratory(NREL)was taken as an example to investigate the vibrant characteristics of wind turbines under environmental loads.Firstly,the model of the random wave forces of wind turbines were established based on Jonswap spectrum and the Morison equation was used to compute the wave force.The time histories of waves agreeing with the wave spectrum were numerically simulated by spectral representation method.The Kaimal spectrum was used to simulate the fluctuating wind loading and the blade element momentum theory was adopted to determine the aerodynamic loading acting on the rotating blades.The effects of soil on the wind turbine were considered and the analytical method for the soil effects was proposed.The results indicate that the dynamic responses of offshore wind turbine are quite complicated and the influences of wind,wave and soil should be taken into consideration.

关 键 词：近海风机 波浪荷载 莫里森(Morison)方程 土壤效应 

分 类 号：O328[理学—一般力学与力学基础] P751[理学—力学]