输电塔线体系断线非线性动力分析

发布时间：2018-07-12 21:33

本文选题：输电塔 + 导线断线　；参考：《振动与冲击》2017年07期

【摘要】：以某500 k V高压输电线路为研究对象,建立三塔四线输电塔-线体系精细化有限元模型,在考虑跌落导(地)线与地面碰撞接触基础上,对其进行了不同断线位置以及不同断线根数的隐式非线性动力分析。结果表明:断线点位置对断线瞬间的冲击作用影响较小;断线后断线一侧张力衰减系数随着导线挂点位置增高而单调递减;未断线一侧张力衰减系数随着挂点位置增高先减小后增大;耐张塔张拉作用系数远大于直线塔;耐张塔的断线动力放大系数在1.1~1.5。在断多根线的最不利工况下研究了耐张塔的扭转破坏和弯曲破坏两种失效模式。
[Abstract]:Taking a 500kV high voltage transmission line as an object of study, a fine finite element model of three-tower and four-wire transmission tower and line system is established, on the basis of considering the contact between the falling conductance (ground) line and the ground, the finite element model of the three-tower and four-wire transmission tower system is established. The implicit nonlinear dynamic analysis of different breakline positions and root numbers is carried out. The results show that the location of the breakpoint has little effect on the impact of the breaking moment, and the attenuation coefficient of tension on one side of the broken line decreases monotonously with the increase of the location of the conductor. The tension attenuation coefficient on the unbroken side decreases first and then increases with the increase of the hanging point, the tension coefficient of the tension tower is much larger than that of the straight line tower, and the dynamic magnification factor of the tension tower is 1.1 卤1.5. Two failure modes of torsional failure and bending failure of tension tower are studied under the most unfavorable condition of breaking multiple lines.
【作者单位】：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室;青岛腾远设计事务所有限公司;
【基金】：国家自然科学青年基金(51508054) 中央高校基本科研业务费(CDJZR12200010)
【分类号】：TM753

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