风力发电塔近、远场地震动响应减震效果分析

为分析风力发电塔结构在近、远场地震荷载作用下的动力响应及应对措施,以某2.5MW风力发电塔结构为原型,通过通用有限元分析软件ABAQUS建立该风力发电塔结构的有限元模型。选取1994年美国Northridge地震各台站记录到的近、远场地震动记录各12条,对比分析该风力发电塔结构在近、远场地震荷载作用下的动力响应。研究表明:近场地震动对风力发电塔结构的动力响应有重要影响,采用黏滞流体阻尼器可以较明显地减小风力发电塔结构在地震荷载作用下的动力响应。

In order to analyze the dynamic response and countermeasures of wind power tower structure under near-field and far-field seismic loads,taking a 2.5MW wind power tower structure as a prototype,the finite element model of the wind power tower structure is established by the general finite element analysis software ABAQUS.12 near-field and far-field vibration records from each station of the 1994 Northridge earthquake in the United States were selected to compare and analyze the dynamic response of the wind power tower under near-field and far-field seismic loads.The study shows that the near-site vibration has an important influence on the dynamic response of the wind power tower structure.