永磁直驱风力发电机组机舱强度及模态分析
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摘要
根据德国劳埃德风电机组认证规范,基于动量-叶素理论在BLADE软件中提取直驱风电机组在各个工况下的极限载荷,采用非线性有限元方法,联合HYPERMESH和Ansys软件对机舱进行极限强度分析.结合直驱风电机组的工作原理,对偏航制动器及偏航驱动电机作用在机舱上的载荷进行分配,提出可以有效模拟机舱真实受载的方法,且基于分析结果对机舱结构进行优化.优化后的模型分析结果显示极限强度满足要求,安全系数为1.5,且质量减轻7.46%.模态分析结果显示机舱固有频率避开了叶轮转动的1P和3P频率,不会出现共振现象.
According to GL Guideline for the Certification of Wind Turbines,extracted the ultimate load of direct-drive wind turbine in the BLADE software.Based on the nonlinear finite element method,the ultimate strength was performed by using HYPERMESH and Ansys software.Analyzed the operating principle of direct-drive wind turbine,distributed the load for the effect of yaw brakes and yaw drives on nacelle,provided a load applying method to simulate the actual stress of nacelle effectively,and optimized the nacelle structure based on the analysis results.Analysis results of the optimized model indicated that the nacelle had sufficient ultimate strength,the safety factor was 1.5.Mode analysis results revealed the natural frequency of the nacelle evaded the driving frequency of the wind wheel,and the resonance phenomenon did not occur.
According to GL Guideline for the Certification of Wind Turbines,extracted the ultimate load of direct-drive wind turbine in the BLADE software.Based on the nonlinear finite element method,the ultimate strength was performed by using HYPERMESH and Ansys software.Analyzed the operating principle of direct-drive wind turbine,distributed the load for the effect of yaw brakes and yaw drives on nacelle,provided a load applying method to simulate the actual stress of nacelle effectively,and optimized the nacelle structure based on the analysis results.Analysis results of the optimized model indicated that the nacelle had sufficient ultimate strength,the safety factor was 1.5.Mode analysis results revealed the natural frequency of the nacelle evaded the driving frequency of the wind wheel,and the resonance phenomenon did not occur.
引文
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[12]Germanischer Lloyd Wind Engergie GmbH.Guideline for the certification of wind turbines[EB/OS].(2012-02-14)[2018-06-06].https://www.docin.com/p-341913071.html.
[2]王美,谭阳红,何怡刚,等.永磁直驱风电系统变流器开路故障诊断新方法[J].太阳能学报,2017,38(12):3392-3398.WANG M,TAN Y H,HE Y G,et al.Novel diagnostic method for open-circuit fault of converter in permanent magnet direct drive wind turbine system[J].Acta Energine Solaris Sinica,2017,38(12):3392-3398.
[3]CHINCHILLA M,ARNALTES S,BURGOS L.Control of permanent-magnet generators applied to variable-speed windenergy systems connected to the grid[J].IEEE Transactions on Energy Conversion,2006,21(1):130-135.
[4]何章涛.MW级风力发电机组主机架系统结构分析及优化设计[D].重庆:重庆大学,2011.HE Z T.Structural of MW graded wind turbine mainframe system and optimization design[D].Chongqing:Chongqing University,2011.
[5]沈凤亚,陈伟梁,唐超利,等.大型风力发电机组机舱座极限强度计算方法与应用[J].水电能源科学,2012,30(9):184-187.SHEN F Y,CHEN W L,TANG C L,et al.Ultimate strength calculation method of large wind turbine support frame and its application[J].International Journal Hydroelectric Energy,2012,30(9):184-187.
[6]ISLAM M R,GUO Y G,ZHU J G.A review of offshore wind turbine nacelle:technical challenges,and research and developmental trends[J].Renewable and Sustainable Energy Reviews,2014,33(5):161-176.
[7]常慧英.风力发电机组主机架结构分析[D].重庆:重庆大学,2010.CHANG H Y.Structural analysis of wind turbine mainframe[D].Chongqing:Chongqing University,2010.
[8]吴斌,董礼,廖明夫,等.水平轴风力机气动计算的叶素动量修正法[J].机械科学与技术,2011,30(12):2124-2134.WU B,DONG L,LIAO M F,et al.Amended BEM method for aerodynamic analysis of wind turbine[J].Mechanical Science and Technology,2011,30(12):2124-2134.
[9]何玉林,曾纯亮,常慧英.永磁直驱风力发电机组主机架强度分析[J].机械设计与制造,2011(9):185-188.HE Y L,ZENG C L,CHANG H Y.Strength analysis of permanent-magnet direct drive wind turbine mainframe[J].Machinery Design and Manufacture,2011(9):185-188.
[10]赵海波,李建功,张忠海.兆瓦级风力发电机铸造弯头支座的强度分析[J].中国机械,2014(4):215-216.ZHAO H B,LI J G,ZHANG Z H.Strength analysis of MW wind turbine elbow support[J].Machine China,2014(4):215-216.
[11]孙红梅,韩雪,张明.风电机组主机架结构优化研究[J].风能,2015(6):64-67.SUN H M,HAN X,ZHANG M.Research on structural analysis of wind turbine mainframe[J].Wind Energy,2015(6):64-67.
[12]Germanischer Lloyd Wind Engergie GmbH.Guideline for the certification of wind turbines[EB/OS].(2012-02-14)[2018-06-06].https://www.docin.com/p-341913071.html.