在风力负荷下,对覆盖冰层传输导体的冲动反应进行分析
Shuang Wu1, Haiqing Liu1,2, Yunlong Wang1
1School of Civil Engineering, Liaoning Technical University, Fuxin, China.
PloS one
|October 31, 2025
概括
对电网构成重大威胁的导体冲刺被研究,使用一种新的动态模型对冰层捆绑导体进行了研究. 关节间隔条被发现有效抑制这种振动现象.
科学领域:
- 电力系统工程 电力系统工程
- 航空航天和机械工程
- 应用物理 应用物理
背景情况:
- 导体冲是一种危险的低频,大振幅振动在输电线路.
- 冰块积累和风力负荷是导体冲刺的主要触发因素,威胁到电网安全.
研究的目的:
- 开发一种非线性动态模型,用于分析冰层捆绑导体中的飞行.
- 为了研究各种冰形状,唤醒效应和风的攻击角度对空气动力学力的影响.
- 为了评估间隔条在减轻导体的有效性.
主要方法:
- 为非线性动态模型开发了基于弹性连锁理论的应变-移位关系.
- 采用D形,风扇形和半月形的冰形状为捆束导体.
- 研究了对空气动力学特征和负载的效应和风攻击角度.
- 使用计算的空气动力学负载进行了冲反应分析.
- 采用三维数值模型进行增强的空气动力力计算.
主要成果:
- 拟议的方法有效地分析了冰积累的传输导体中的狂奔幅度.
- 三维数值模型显著提高了捆束导体空气动力计算的准确性.
- 冰层导体周围的流场周期性受效应,风角度,冰体几何,冰厚和风速的影响.
- 关节间隔条在抑制导体冲方面表现出卓越的有效性.
结论:
- 开发的模型提供了一种高效和准确的方法来分析导体冲.
- 了解空气动力学力和流场动力学对于预测和减轻跳跃至关重要.
- 间隔棒的设计,特别是有关节连接的设计,是抑制导体的关键因素.
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