摘要
为分析风-震共同作用下风力机塔架的动力响应,基于Wolf方法建立了土-构耦合模型,通过开源软件Fast预留数据接口开发了地震载荷模块,研究了在不同土质下塔架的振动特性和响应幅值。结果表明:地震载荷极大地加剧了塔架振动,尤其是塔架一阶固有频率和二阶固有频率的振动幅值明显增大;设防烈度为8度时,塔顶振动的主要激励为地震载荷,气动载荷对塔顶振动的影响很小,可忽略不计;由于阻尼和地震反应谱特征周期不同,在不同土质下塔架的响应幅值和振动特性差异较大;与无地震相比,在额定风况下硬黏土、岩土和软土3种不同场地土质发生地震时,塔顶侧向位移分别增大了316%、242%和265%。
To analyze the dynamic response of a wind turbine tower under combined wind-earthquake actions,a soil-structure interaction model was established based on Wolf method,following which a seismic load module was developed by using open source software Fast,so as to study the vibration characteristics and response amplitude of the tower in different soils.Results show that the seismic load greatly intensifies the vibration of the tower,with obviously increased amplitude of vibration at the first-and second-order natural frequency.At the fortification intensity of 8,the vibration of tower top is mainly excited by seismic load,slightly influenced by aerodynamic load.Due to different characteristics of damping and seismic response spectrum,the response amplitude and vibration characteristics are quite different for the tower in different soils.Under rated wind conditions,the lateral displacement of tower top has an increase of 316%,242%,and 265% respectively for the tower in still clay soil,rock still soil and soft soil,compared with the condition without earthquake.
作者
刘中胜
杨阳
李春
邹锦华
LIU Zhongsheng;YANG Yang;LI Chun;ZOU Jinhua(School of Energy and Power Engineering,University Shanghai 200093,China;Shanghai Key Laboratory in Power Engineering,Shanghai of Shanghai for Science and Technology,of Multiphase Flow and Heat Transfer 200093,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第7期587-593,共7页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51676131
51176129)
上海市科委资助项目(13DZ2260900)
关键词
风力机
地震
土-构耦合
土质
动力响应
wind turbine
earthquake
soil-structure interaction
soil
dynamic response
