基于MEMS惯性测量的输电导线振动损伤分析

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摘要为了有效地分析输电导线振动引起的损伤，提出一种基于MEMS惯性测量的振动损伤度量方法。首先利用MEMS惯性测量输电线运动的三轴加速度和角速度，为精准提取输电导线运动特征，通过滤波和分段进行预处理，再进行积分与FFT变换得到输电导线平动/转动的幅值和频率；然后从损伤耗能的角度，利用幅值和频率参数构造振动耗能函数，度量输电导线振动中材料损伤所消耗的能量；然后根据振动损伤与振动耗能函数之间的关系，建立振动损伤函数模型，计算输电导线的损伤程度；最后设计输电导线振动损伤模拟试验进行验证。结果表明建立的振动损伤函数模型能够准确判断输电导线的损伤程度，说明所提出的输电导线振动损伤度量分析方法是有效的。

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关键词 ：惯性测量, 线路平动/转动, 幅值和频率, 损伤耗能, 振动损伤模型

Abstract：In order to effectively analyze damage caused by vibration of transmission lines, a vibration damage measurement method based on MEMS inertial measurement was proposed. Firstly, MEMS inertial measurement was used to measure 3-axis accelerations and angular velocities of a transmission line’s motion. To accurately extract motion characteristics of the transmission line, pre-processing these signals was performed through filtering and segmentation, and integration and FFT transform were done for the pre-processed signals to obtain amplitude and frequency of the transmission line translation/rotation. Then, from the perspective of damage energy dissipation, vibration energy dissipation function was constructed by using amplitude and frequency parameters to measure the energy dissipated by material damage in transmission line vibration. Based on the relationship between vibration damage and vibration energy dissipation function, the vibration damage function model was established to calculate damage degree of transmission line. Finally, simulation tests for transmission line vibration damage was designed and performed. Results showed that the established vibration damage function model can accurately reflect damage degree of transmission line; the proposed transmission line’s vibration damage measurement analysis method is effective.

Key words： inertial measurement lines translation/rotation amplitude and frequency damage energy dissipation vibration damage model

收稿日期: 2019-05-09 出版日期: 2020-08-28

引用本文:

基于MEMS惯性测量的输电导线振动损伤分析. 基于MEMS惯性测量的输电导线振动损伤分析[J]. 振动与冲击, 2020, 39(17): 261-267.
YANG Jinxian1, WANG Mengmeng1, LIU Yipeng2, WANG Yaping1, LI Mingqi1. Vibration damage analysis of transmission line based on MEMS inertial measurement. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(17): 261-267.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I17/261

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