【摘要】 建立了输电塔–线耦联体系的空间模型,利用Davenport谱模拟了目标场地风场,采用线性弹簧模型与Maxwell模型相结合模拟调谐质量阻尼器(tunedmassdamper,TMD),采用考虑导线几何刚度时变性的非线性直接积分方法对有无TMD的单塔、塔–线体系风致响应时程分析,进行TMD调频参数优化控制计算,并比较了单塔与塔–线体系时程反应。分析结果表明,对单塔和塔–线体系优化控制,均可根据单塔模态分析得到的频率计算TMD优化参数;由于背景反应的增加,使得塔–线体系总反应比单塔有较大幅度增长。更多还原

【Abstract】 A three-dimension coupled model of transmission tower-line system is established. Then, wind speed histories of the given field are generated using Davenport spectrum. In addition, a method to simulate tuned mass damper (TMD) is presented and proposed by combining linear spring model and Maxwell model. A nonlinear direct integration method considering conducting wire time-varying geometric stiffness is adopted to calculate wind-induced dynamic response of single tower and tower-line system. Moreover, control effectiveness of different optimization parameters of TMD is compared. The results of this study show that it is acceptable for both single tower and tower-line system to count optimization parameters of TMD according to the frequency computed from single tower modal analysis, and it is due to the increase of background response that make the total response of tower-line system be greater than those of single tower.更多还原