输电塔线体系导线舞动过程中的振幅和张力

发布时间：2018-05-27 18:54

本文选题：输电塔线体系 + 舞动幅值　；参考：《中国电力》2014年10期

【摘要】：建立3条四分裂线路段塔线耦合体系有限元模型,利用ABAQUS有限元软件对导线舞动过程进行数值模拟,得到各档各相导线舞动过程中的振动幅值和张力变化,将数值模拟结果与现有理论简化公式和经验公式的计算结果进行比较分析。结果表明:导线舞动过程中耐张档的舞动幅值明显大于直线档的舞动幅值,并且认为理论简化公式适用于耐张档的舞动幅值估算。以往所提出的经验公式适用于直线档的舞动幅值估算,以及提出的简化公式可以用于估算导线舞动过程中动张力的变化。此外,导线舞动过程中耐张塔的应力远大于直线塔的应力,特定风速下导线和耐张塔上的最大应力超过其许用应力,可能造成断线和杆塔破坏。
[Abstract]:The finite element model of the coupled system of tower and line in three four-splitting lines is established. The vibration amplitude and tension change during the galloping process of each phase wire are obtained by using the ABAQUS finite element software to simulate the galloping process of the conductor. The numerical simulation results are compared with those of the existing theoretical simplified formulas and empirical formulas. The results show that the galloping amplitude of tensioning is obviously larger than that of straight line during wire galloping, and it is considered that the simplified formula can be used to estimate the galloping amplitude of tensioning. The empirical formulas proposed in the past can be used to estimate the galloping amplitude of a straight line and the simplified formula can be used to estimate the variation of dynamic tension during wire galloping. In addition, the stress of the tension tower is much greater than that of the linear tower during the wire galloping, and the maximum stress of the wire and the tension tower exceeds its allowable stress under the specific wind speed, which may lead to the breakage and the failure of the tower.
【作者单位】：重庆大学航空航天学院;重庆大学土木工程学院;中国电力工程顾问集团西南电力设计院;
【基金】：国家自然科学基金资助项目(51277186)~~
【分类号】：TM753

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