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8 MW风机塔筒振动响应分析 预览

Vibration Response Analysis of 8 MW Wind Turbine Towers
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摘要 为获取8MW风机塔筒的振动响应特性,建立了塔筒的有限元分析模型,对塔筒开展了模态分析、谐响应分析和瞬态响应分析。模态分析结果表明,塔筒的前四阶模态振型均为弯曲振动,风机工作在额定转速时,塔筒不会发生共振。谐响应分析结果表明,当载荷频率为0-2Hz时,塔筒频域响应曲线存在2个共振频率,分别对应塔筒的第一阶模态频率、第三阶模态频率;塔筒发生三阶共振时,塔筒顶部Z向的位移超过4.5m,已处于非安全工作状态,在工作中要避免出现。瞬态响应分析结果表明,在允许的工作风速范围内,塔筒的最大位移和最大应力变化不明显;在极限载荷工况下,塔筒的最大位移和最大应力显著增加,塔筒不会发生强度失效。 A finite element analysis model of 8 MW wind turbine towers has been established to obtain the vibration response characteristics, followed by the modal analysis, harmonic response analysis and transient response analysis of wind turbine towers. The results of modal analysis show that the vibration shape of first four modes of the tower are all bending vibration, under which condition the tower barrel will not resonate with the fan working at rated speed. The results of harmonic response analysis show that, with the load frequency between 0~2 Hz, there are two resonant frequencies in the frequency domain response curve of tower, corresponding to the first mode frequency and the third mode frequency of the tower respectively. When the third order resonance of the tower occurs, the displacement of tower top in Z direction exceeds 4.5 m, which is in unsafe working state. The results of transient response analysis show that the maximum displacement and stress of the tower undergo no significant change within the allowable operating wind speed range. Under extreme loading condition, the maximum displacement and stress of the tower increase significantly, without the strength failure of the tower barrel occurring.
作者 黄中华 许欣 田湘龙 李亚超 谢雅 HUANG Zhonghua;XU Xin;TIAN Xianglong;LI Yachao;XIE Ya(College of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan Hunan 411104,China;XEMC Windpower Co., Ltd.,Xiangtan Hunan 411102,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)
出处 《湖南工业大学学报》 2019年第4期36-41,共6页 Journal of Hnnnan University of Technology
基金 湖南省重点研发计划基金资助项目(2018GK2073) 湖南省自然科学基金资助项目(2018JJ4043) 国家自然科学基金资助项目(51875193).
关键词 风机塔筒 振动响应 动力学分析 模态分析 塔筒设计 wind turbine tower vibration response dynamic analysis modal analysis tower design
作者简介 黄中华(1979-),男,湖南娄底人,湖南工程学院教授,主要从事机械动力学方面的教学与研究,E-mail:csu707@163.com;通信作者:谢雅(1982-),女,湖南常德人,湖南工程学院副教授,主要从事计算机仿真与控制方面的教学与研究,E-mail:csu_xieya@126.com.
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