600kW风力发电机组地震反应谱分析
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摘要
对一台600kW风力发电机组进行地震反应谱分析,以评价其地震危险性。风机原型基于实际安装的风机,采用有限元软件SAP2000建立模型并进行反应谱计算。使用中国地震反应谱,考虑不同地震烈度、场地类别和阻尼比,计算塔架弯矩及最大正应力。探讨了叶片方位角对风机模态特性的影响,发现其影响很小。但是,叶片地震反应可能变化较大。由于缺乏叶片的模型,该现象在以往研究中通常被忽略。
A seismic response spectrum analysis of a 600kW wind turbine was performed to evaluate its seismic hazard,since a great amount of wind turbines had been planted in China and many of them were located in seismic active regions.The prototype was based on a real wind turbine assembled in China.The finite element software SAP2000 was applied to simulate the wind turbine and the response spectrum calculation was executed.The Chinese response spectrum was used,and the seismic fortification intensity,soil type and damping ratio were considered.The maximum normal stress of the tower was calculated.The influence of the blade azimuth on the mode characteristics of the wind turbine was investigated.It is found that the influena is minor.However,the seismic response of the blades may be significantly changed.This phenomenon was usually ignored in previous research due to the absence of the modeling for the blades.
A seismic response spectrum analysis of a 600kW wind turbine was performed to evaluate its seismic hazard,since a great amount of wind turbines had been planted in China and many of them were located in seismic active regions.The prototype was based on a real wind turbine assembled in China.The finite element software SAP2000 was applied to simulate the wind turbine and the response spectrum calculation was executed.The Chinese response spectrum was used,and the seismic fortification intensity,soil type and damping ratio were considered.The maximum normal stress of the tower was calculated.The influence of the blade azimuth on the mode characteristics of the wind turbine was investigated.It is found that the influena is minor.However,the seismic response of the blades may be significantly changed.This phenomenon was usually ignored in previous research due to the absence of the modeling for the blades.
引文
[1]Lavassas I,Nikolaidis G,Zervas P,et al.Analysis anddesign of the prototype of a steel 1-MW wind turbine tower[J].Engineering Structures,2003,25(8):1097—1106.
[2]贺广零,周勇,李杰.风力发电高塔系统地震动力响应分析[J].工程力学,2009,26(7):72—77.[2]He Guangling,Zhou Yong,Li Jie.Seimic analysis ofwind turbine system[J].Engineerring Mechonics,2009,26(7):72—77.
[3]GB50011—2001,建筑抗震设计规范[S].
[4]GB50051—2002,烟囱设计规范[S].
[2]贺广零,周勇,李杰.风力发电高塔系统地震动力响应分析[J].工程力学,2009,26(7):72—77.[2]He Guangling,Zhou Yong,Li Jie.Seimic analysis ofwind turbine system[J].Engineerring Mechonics,2009,26(7):72—77.
[3]GB50011—2001,建筑抗震设计规范[S].
[4]GB50051—2002,烟囱设计规范[S].
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