风力发电塔筒极端动力荷载作用下破坏的对比研究  

Failure of a wind turbine tower under extreme dynamic loads

作　　者：戴靠山 赵志[2] 毛振西 DAI Kaoshan;ZHAO Zhi;MAO Zhenxi(Department of Civil Engineering,Sichuan University,Chengdu 610065,China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]四川大学土木工程系,成都610065 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《振动与冲击》2019年第15期252-257,272,共7页Journal of Vibration and Shock

基　　金：科技部“政府间国际科技创新合作”重点专项(2016YFE0105600);上海市国际合作项目(16510711300);国家自然科学基金(51878426);四川省国际合作项目(18GJHZ0111)

摘　　要：为了研究和对比风力发电塔筒在极端动力荷载作用(风和地震)下的破坏模式,对于某典型风电塔通过ABAQUS建立考虑土-结构相互作用和叶片建模的精细有限元模型,开展了一系列非线性时程分析。风场由Turbsim软件人工生成,风荷载由风机设计软件FAST计算得到;地震选用适用于硬土场地的典型记录。分析结果表明,塑性铰大部分出现在塔筒几何非连续处,一旦局部全截面塑性铰稳定出现,即面临倒塌。在强风下,风速的能量在风电塔低频分布较高,塔筒受基本模态控制,在底部出现全截面塑性铰和倒塌;在强震下,地震动的能量在风电塔高频也分布较高,塔筒受高阶模态影响,虽然塑性铰首先在底部出现,但全截面塑性铰与倒塌位置在中部或上部,并且不同的天然地震动可能导致不同的倒塌位置。In order to study and compare failure modes of a wind turbine tower under extreme dynamic loads including wind and seismic loads, a series of nonlinear dynamic time history analyses were performed using a precision finite element model of a typical wind turbine tower built with the software ABAQUS and considering soil-structure interaction and blade modelling. Wind fields were generated using the software Turbsim and wind loads were calculated using the software FAST. The typical ground motion records were selected to be suitable for sites of hard soil. Analysis results showed that most plastic hinges occur at its geometric discontinuous points and the tower faces collapse once a local full-section plastic hinge stably appears;under strong wind, wind energy is concentrated in a lower frequency band, the tower is controlled by its fundamental mode and collapse occurs at its bottom;under strong earthquakes, ground motion energy is concentrated in a higher frequency band, the tower is affected by its higher modes;although plastic hinges firstly appear at its bottom, full-section plastic hinge and collapse are located at the tower’s middle or upper part, and different natural ground motions may cause different collapse positions.

关 键 词：风力发电塔筒 极端荷载 非线性时程分析 倒塌模拟 

分 类 号：TU33[建筑科学—结构工程]