风力发电机组塔架底部地震剪力、弯矩计算方法研究
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摘要
计算在地震作用下风力发电机组塔架底部的剪力和弯矩,一般需要对完整的有限元模型进行分析,计算较为复杂。当风力发电机组质量、刚度分布不详时,无法建立有限元模型,可采用本文所述推导公式进行计算,也可建立单自由度或两自由度简化模型,按照底部剪力法进行计算。误差分析表明,用底部剪力法进行风力发电机组地震作用计算,结果具有较好的精度。
The base shear and moment of wind turbines under the earthquake are usually calculated through finite element analysis,which is complicated. When the mass and stiffness distribution of wind turbines are unknown,the finite element model can not be established. In this case,the formula referred in this paper can be applied to calculate the base shear and moment. Besides,the single or two degrees of freedom simplified model can be formed and the result is calculated by the base shear method. The error analysis shows that this seismic calculation of wind turbines by the base shear method yields a satisfying accuracy.
The base shear and moment of wind turbines under the earthquake are usually calculated through finite element analysis,which is complicated. When the mass and stiffness distribution of wind turbines are unknown,the finite element model can not be established. In this case,the formula referred in this paper can be applied to calculate the base shear and moment. Besides,the single or two degrees of freedom simplified model can be formed and the result is calculated by the base shear method. The error analysis shows that this seismic calculation of wind turbines by the base shear method yields a satisfying accuracy.
引文
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[14]季亮,祝磊,叶桢翔.风力发电机组基本自振周期的经验公式[J].风能,2012(8):54-59(Ji Liang,Zhu Lei,Ye Zhenxiang.Empirical formula of the natural period for wind turbines[J].Wind Energy,2012(8):54-59(in Chinese))
[2]Global Wind Energy Council.Global wind energy outlook2010[R].Global Wind Energy Council,2010
[3]祝磊.风电机组结构抗震研究现状[J].风能,2010,4:58-59
[4]季亮,祝磊.风力发电机组抗震研究综述[C]//2011可再生能源学术年会.北京,2011
[5]Zhu Lei,Wang Yuanqing,ShiYongjiu.Seismic load analysis of wind turbines by response spectrum approach[C]//The2nd International Conference on Energy and Environment Technology.Changsha,China,2010:1706-1709
[6]Zhu Lei.Seismic response of wind turbine in the parked and operating conditions[D].Tokyo:University of Tokyo,2007
[7]季亮,祝磊.5MW风力发电机组频域和时域地震分析[M].钢结构,2012(增):596-600(Ji Liang,Zhu Lei.Seismic analysis of a 5MW wind turbine in frequency domain and time domain[M].Steel Construction,2012(S):596-600(in Chinese))
[8]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011—2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[9]祝磊,姚小芹,王元清,等.600kW风力发电机组地震反应谱分析[J].太阳能学报,2012,33(10):1672-1675(Zhu Lei,Yao Xiaoqin,Wang Yuanqing,et al.Seismic response spectrum analysis of a 600kW wind turbine[J].Acta Energiae Solaris Sinica,2012,33(10):1672-1675(in Chinese))
[10]GB 50051—2002烟囱设计规范[S].北京:中国计划出版社,2003(GB 50051—2002 Code for design of chimneys[S].Beijing:China Architecture&Building Press,2003(in Chinese))
[11]IEC61400-1 Wind turbines-Part 1:design requirements[S].International Electrotechnical Commission,2003
[12]Lavassas I,Nikolaidis G,Zervas P,et al.Analysis and design of the prototype of a steel 1-MW wind turbine tower[J].Engineering Structures,2003,25(8):1097-1106
[13]贺广零.风力发电高塔系统风致随机动力响应分析与抗风可靠度研究[D].上海:同济大学,2009(He Guangling.Stochastic dynamic response and reliability analysis of wind turbine systems under wind loading[D].Shanghai:Tongji University,2009(in Chinese))
[14]季亮,祝磊,叶桢翔.风力发电机组基本自振周期的经验公式[J].风能,2012(8):54-59(Ji Liang,Zhu Lei,Ye Zhenxiang.Empirical formula of the natural period for wind turbines[J].Wind Energy,2012(8):54-59(in Chinese))
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