| 基于磁流变阻尼器的结构损伤模拟试验研究 |
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| 引用本文： | 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 |
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| 作者姓名： | 林友新 贾子光 任亮 李宏男 成明涛张鹏 |
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| 作者单位： | 1. 广东电网公司 电力科学研究院, 广州 510080; 2. 大连理工大学 建设工程学部, 大连 116024 |
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| 基金项目： | 国家自然科学基金委创新研究群体基金(51121005);广东电网公司项目和高等学校学科创新引智计划(B08014) |
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| 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。
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| 关 键 词： | 磁流变阻尼器 损伤识别 短时傅里叶变换 |
| 收稿时间： | 2013-03-25 |
| 修稿时间： | 2013-05-03 |
Experimental Study of Structural Damage Simulation based on MR Damper |
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| 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 |
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| Authors: | Lin Youxin Jia Ziguang Ren Liang Li Hongnan Cheng Mingtao Zhang Peng |
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| Affiliation: | 1. Electric Power Research Institute, Guangdong Power Grid Corporation, Guangzhou 510080, China; 2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024,China |
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| 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. |
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| Keywords: | magneto-rheological damperdamage identificationshort-time Fourier transform |
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