防振锤非线性阻抗的实验研究及参数识别

PDF(1337 KB)

振动与冲击 ›› 2013, Vol. 32 ›› Issue (11) : 182-185.

论文

防振锤非线性阻抗的实验研究及参数识别

罗啸宇 1，张宜生 1，谢书鸿 2，李新春 2，徐志磊 2，刘丽君 2

作者信息 +

Experiment Study on Nonlinear Impedance of Vibration Damper and Parameter Identification

Luo Xiaoyu 1, Zhang Yisheng 1, Xie Shuhong 2, Li Xinchu 2, Xu Zhilei 2, Liu Lijun 2

Author information +

文章历史 +

摘要

防振锤被广泛用于减轻架空输电线微风振动，阻抗是评价其减振性能的重要指标。针对防振锤所具有的非线性特性，设计了一套利用正弦扫频测试阻抗的方案，通过测量防振锤在不同的激振速度下的阻抗谱，识别防振锤在不同振动速度下的的固有频率和阻抗，并计算出每一阶固有频率所对应的阻尼比。分析了振动速度对防振锤振动参数的影响。最后，通过对比防振锤阻抗谱的实验结果和计算结果，指出了现有防振锤线性力学模型的局限性。

Abstract

Vibration damper is widely used in overhead transmission lines to alleviate aeoline vibration. Impedance is important evaluation criteria. Aiming at studying its nonlinear characteristics, an impedance measurement method using sine frequency sweep was developed. By measuring impedance spectrum for vibration damper under different excitation velocity, mode frequencies and impedance for different velocity were identified, as well damping ratio for each mode frequency was calculated. Relationship between velocity and the vibration parameter was analyzed. At last, limitation of the existing linear mechanical model of the vibration damper was pointed out, by comparing the results of experiment and calculation.

导出引用

罗啸宇;张宜生;谢书鸿;李新春;徐志磊;刘丽君 . 防振锤非线性阻抗的实验研究及参数识别[J]. 振动与冲击, 2013, 32(11): 182-185

Luo Xiaoyu;Zhang Yisheng;Xie Shuhong;Li Xinchu;Xu Zhilei;Liu Lijun . Experiment Study on Nonlinear Impedance of Vibration Damper and Parameter Identification[J]. Journal of Vibration and Shock, 2013, 32(11): 182-185