基于磁流变阻尼器的结构损伤模拟试验研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (7) : 147-152.

论文

基于磁流变阻尼器的结构损伤模拟试验研究

林友新1 , 贾子光2，任亮2，李宏男2，成明涛1张鹏2

作者信息 +

Experimental Study of Structural Damage Simulation based on MR Damper

Lin Youxin1, Jia Ziguang2， Ren Liang2，Li Hongnan2，Cheng Mingtao1, Zhang Peng2

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文章历史 +

摘要

本文提出了一种利用磁流变阻尼器模拟受压构件刚度折减的试验方法。通过改变磁流变阻尼器通电电流来调整受压构件的抗压刚度的大小。在输电塔桁架截断动力模型试验中，利用该方法模拟受压构件刚度的瞬时折减。结合短时傅里叶变换方法，对构件发生刚度折减的时间进行损伤识别。试验结果验证了该方法的有效性。

Abstract

This paper presents an experimental method to simulate stiffness reduction of compressed member using magneto-rheological damper (MR damper). The compressional stiffness is changed by current regulation of MR damper. In a transmission tower partial truss model dynamic experiment, simulation of instantaneous compressional stiffness reduction is carried out based on this approach. The dynamic response is processed by joint time frequency analysis, through which the damage time is to be figured out precisely. The result shows that this method is effective in model experiment.

导出引用

林友新;贾子光;任亮;李宏男;成明涛张鹏. 基于磁流变阻尼器的结构损伤模拟试验研究[J]. 振动与冲击, 2014, 33(7): 147-152

Lin Youxin;Jia Ziguang;Ren Liang;Li Hongnan;Cheng Mingtao;Zhang Peng. Experimental Study of Structural Damage Simulation based on MR Damper[J]. Journal of Vibration and Shock, 2014, 33(7): 147-152