风对架空输电线路影响的现场测量和频谱分析

IF 0.9 Q4 ACOUSTICS
M. Dutkiewicz, M. Machado
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引用次数: 10

摘要

本文分析了输电线路在实际条件下的振动问题。本文作者在进行此类研究时,考虑了传输线上使用的电缆的横截面。对跨度213.0 m的现代ACSR高压输电线路进行了分析。调查的目的是分析输电线在自然环境中的振动,并与数值模拟结果进行比较。对自然振动和风激振动进行了分析。采用谱元法建立了数值模型。在频谱模型中,对刚度、阻尼和拉力等参数进行了系统响应校核,并与现场测量得到的加速度结果进行了比较。计算频率响应函数(FRF)。通过比较FRF函数的图形图和表示加速度幅值(MSG)、相角差值(PSG)以及加速度和相角总值(CSG)差异的数值,对模型的可信度进行了评估。特别注意了滞回阻尼分析。分析了波数对拉索张力和截面积变化的敏感性。构成本文目的的下一个方面是介绍利用谱元方法对细长导体进行建模和模拟的广泛可能性。所得结果在实验测量和仿真分析范围内均具有较高的精度。本文强调导体的灵敏度及其对谱网格划分密度、电缆截面、抗拉强度或材料阻尼变化的响应可以很容易地进行研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Measurements in Situ and Spectral Analysis of Wind Flow Effects on Overhead Transmission Lines
In the paper an important issue of vibrations of the transmission line in real conditions was analyzed. Such research was carried out by the authors of this paper taking into account the cross-section of the cable being in use on the transmission line. Analysis was performed for the modern ACSR high voltage transmission line with span of 213.0 m. The purpose of the investigation was to analyze the vibrations of the power transmission line in the natural environment and compare with the results obtained in the numerical simulations. Analysis was performed for natural and wind excited vibrations. The numerical model was made using the Spectral Element Method. In the spectral model, for various parameters of stiffness, damping and tension force, the system response was checked and compared with the results of the accelerations obtained in the situ measurements. A frequency response functions (FRF) were calculated. The credibility of the model was assessed through a validation process carried out by comparing graphical plots of FRF functions and numerical values expressing differences in acceleration amplitude (MSG), phase angle differences (PSG) and differences in acceleration and phase angle total (CSG) values. Particular attention was paid to the hysteretic damping analysis. Sensitivity of the wave number was performed for changing of the tension force and section area of the cable. The next aspect constituting the purpose of this paper was to present the wide possibilities of modelling and simulation of slender conductors using the Spectral Element Method. The obtained results show very good accuracy in the range of both experimental measurements as well as simulation analysis. The paper emphasizes the ease with which the sensitivity of the conductor and its response to changes in density of spectral mesh division, cable cross-section, tensile strength or material damping can be studied.
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来源期刊
Sound and Vibration
Sound and Vibration 物理-工程:机械
CiteScore
1.50
自引率
33.30%
发文量
33
审稿时长
>12 weeks
期刊介绍: Sound & Vibration is a journal intended for individuals with broad-based interests in noise and vibration, dynamic measurements, structural analysis, computer-aided engineering, machinery reliability, and dynamic testing. The journal strives to publish referred papers reflecting the interests of research and practical engineering on any aspects of sound and vibration. Of particular interest are papers that report analytical, numerical and experimental methods of more relevance to practical applications. Papers are sought that contribute to the following general topics: -broad-based interests in noise and vibration- dynamic measurements- structural analysis- computer-aided engineering- machinery reliability- dynamic testing
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