输电塔塔线体系风振响应分析

谢华平;何敏娟

振动与冲击 ›› 2011, Vol. 30 ›› Issue (7) : 45-51.

PDF(2076 KB)
PDF(2076 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (7) : 45-51.
论文

输电塔塔线体系风振响应分析

  • 谢华平1,2; 何敏娟2
作者信息 +

Analysis on wind-induced dynamic response of transmission line systems

  • XIE Hua-ping1,2; HE Min-juan2
Author information +
文章历史 +

摘要

基于风洞试验得到的输电塔线性一阶广义荷载谱,推导了一般性的输电塔顺风向、横风向脉动风荷载功率谱公式。利用此功率谱,模拟了塔线体系顺风向、横风向脉动风荷载。对输电塔线体系及单塔的动力特性进行了分析,分析表明,在远低于单塔同阶振型的自振频率时,塔线体系中的输电塔平面外振型就会与导地线振动耦合。对单塔及输电塔-线体系进行非线性动力时程分析,得到了位移、加速度和内力等响应的时程,对比了有、无横风向脉动风荷载的风振响应,并分析了风振响应的功率谱。

Abstract

Power spectra expressions of along-wind and cross-wind fluctuating wind load acting on transmission tower were deduced based on the fundamental linear mode generalized force spectra obtained through a wind tunnel test.Time histories of along-wind and cross-wind fluctuating wind load were simulated based on these spectra. Dynamic characteristics of single tower and the coupling system were analyzed. The results show that The out-plane vibration modes of tower in the system are most likely to occur coupling with cables, even the frequency is far below the same order natural frequency of single tower. Time histories of displacement, acceleration and internal force et al were obtained based on nonlinear dynamic time-history analyses of the transmission towers-line system and single tower. The wind-induced response spectra and diffences between the case applying across-wind loads and the case not applying were analyzed.

关键词

风工程 / 输电塔线体系 / 动力特性 / 风振响应

Key words

wind engineering / transmission tower-line system / dynamic characteristies / wind-induced response

引用本文

导出引用
谢华平;何敏娟. 输电塔塔线体系风振响应分析[J]. 振动与冲击, 2011, 30(7): 45-51
XIE Hua-ping; HE Min-juan . Analysis on wind-induced dynamic response of transmission line systems[J]. Journal of Vibration and Shock, 2011, 30(7): 45-51

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