无阻尼架空导线在风振作用下的疲劳损伤评价

IF 3.8 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Shaoqi Yang;Luc Chouinard;Sébastien Langlois;Pierre Van Dyke;Josée Paradis
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引用次数: 0

摘要

由于风振引起的架空输电线路的微动疲劳是一种随着基础设施使用寿命的增加而增加的危险。本文的目的是介绍一个全面的框架来评估铝导体钢增强(ACSR)导体的剩余寿命,以支持最佳的风险知情决策,以规划其检查,维修或更换。利用来自450米无阻尼测试线的风和振动数据,开发了一个三步方法。第一步是在指定的非仪器位置估计风速和风向的分布。然后根据分布估计风湍流强度,同时考虑当地地面特征。接下来,通过使用提出的能量平衡原理(EBP)方法,开发了一个模型来估计振动的振幅和周期数作为线和风特性的函数。最后,通过ACSR的应力-寿命(S-N)模型对预测振动分布的卷积估计了微动疲劳失效的概率作为时间的函数。采用Weibull S-N模型对微动疲劳抗力的不确定性进行建模,采用基于等效损伤和Miner定律的损伤累积来定义极限状态函数。虽然该方法最初是为ACSR Bersfort导线开发的,但它适用于其他ACSR导线类型和线路配置。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of Fatigue Damage for Undamped Overhead Conductors Under Aeolian Vibration
The fretting fatigue of overhead transmission lines due to aeolian vibrations is a hazard that increases with the service life of such infrastructure. The aim of the paper is to introduce a comprehensive framework for assessing the residual life of Aluminum Conductor Steel Reinforced (ACSR) conductors to support optimal risk-informed decisions for planning their inspection, repair, or replacement. Utilizing wind and vibration data from a 450-meter undamped test line, a three-step methodology is developed. The first step is the estimation of the distribution of wind speed and direction at a specified non-instrumented location. The wind turbulence intensity is then estimated from the distribution while also considering local land surface characteristics. Next, a model is developed to estimate the amplitude and number of cycles of vibrations as a function of line and wind characteristics by using a proposed Energy Balance Principle (EBP) methodology. Finally, the probability of failure in fretting fatigue as a function of time is estimated by convolution of the distribution of predicted vibrations with the ACSR's Stress-Life (S-N) model. The Weibull S-N model is used to model the uncertainty in fretting fatigue resistance, and damage accumulation based on equivalent damage and Miner's law is used to define the limit state function. While the methodology is initially developed for ACSR Bersfort conductors, it is adaptable to other ACSR conductor types and line configurations.
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来源期刊
IEEE Transactions on Power Delivery
IEEE Transactions on Power Delivery 工程技术-工程:电子与电气
CiteScore
9.00
自引率
13.60%
发文量
513
审稿时长
6 months
期刊介绍: The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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