大跨越输电塔-线体系覆冰断线模型试验研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (24) : 41-47.

论文

大跨越输电塔-线体系覆冰断线模型试验研究

刘春城1，2 毛绪坤1 刘法栋1 李霞辉1

作者信息 +

Model Test Study on Line Disconnection of Icing Long Spanned Transmission Tower-line System

Liu Chun-cheng1,2，Mao Xu-kun1，Liu Fa-dong1，Li Xia-hui1

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文章历史 +

摘要

为了准确有效研究大跨越输电塔-线体系中杆塔结构在覆冰断线工况下的动力响应，以晋东南-南阳-荆门1000kV特高压输变电工程中的黄河大跨越段为原型，进行了模拟覆冰条件下五塔四线塔-线体系模型的断线冲击响应试验。试验测得了输电塔薄弱位置杆件的应变时程曲线，研究了塔-线体系在不同断线工况下杆塔的动力响应。通过分析得出了输电杆塔的最不利断线工况，找出了输电塔在断线冲击作用下的最不利位置，为输电塔结构抗冰灾设计提供了有价值的参考。通过进一步研究发现，当断线位置在导、地线悬挂点附近时，输电塔的测点应变突变值与覆冰厚度成近似的一元二次函数关系。

Abstract

In order to study the dynamic response of tower structure on line disconnection of icing long spanned transmission tower-line system accurately and efficiently, taking 1000kV transmission lines of an ultra high voltage(UHV) transmission project as the prototype, a line disconnection test on icing aeroelastic model was carried out to find out the dynamic response of tower structure under different conditions of tower-line system. The time-history curves of strain at weak location of transmission tower were observed in the test. By analysis the dynamic response of tower structure on line disconnection, the most unfavorable line disconnection conditions and position of tower was investigated, the results can provide a scientific basis for anti-ice disaster of tower structure. Further studies show that the relation between the dynamic response of each measuring point on the tower and the ice thickness was subject to approximate parabolic function.

导出引用

刘春城; 毛绪坤刘法栋李霞辉. 大跨越输电塔-线体系覆冰断线模型试验研究[J]. 振动与冲击, 2012, 31(24): 41-47

Liu Chun-cheng;Mao Xu-kun;Liu Fa-dong;Li Xia-hui . Model Test Study on Line Disconnection of Icing Long Spanned Transmission Tower-line System[J]. Journal of Vibration and Shock, 2012, 31(24): 41-47