| 结构损伤检测的实验模态分析 |
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| 引用本文： | 张向东,王志华. 结构损伤检测的实验模态分析[J]. 北京石油化工学院学报, 2005, 13(1): 34-37 |
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| 作者姓名： | 张向东 王志华 |
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| 作者单位： | 1. 北京石油化工学院机械工程系,北京,102617
2. 太原理工大学应用力学研究所,太原,030024 |
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| 摘 要： | 阐述了实验模态分析的理论依据，选用工程上常见的矩形截面悬臂梁，通过实验模态分析对结构损伤引起的模态频率移动进行了研究。相对于位移曲率模态，提出了应变曲率模态的方法，并对该方法的有效性进行了实验验证，并就它们在实际应用中的不足之处进行了讨论。比较了位移模态和应变模态的不同响应结果，指出应变模态对局部损伤更加敏感。
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| 关 键 词： | 结构损伤检测 曲率模态 应变模态 位移 矩形截面 局部损伤 悬臂梁 对局 实验模态分析 实际 |
| 修稿时间： | 2004-10-11 |
Analysis of Experimental Modal in Structural Damage Detection |
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| Zhang Xiangdong,Wang Zhihua. Analysis of Experimental Modal in Structural Damage Detection[J]. Journal of Beijing Institute of Petro-Chemical Technology, 2005, 13(1): 34-37 |
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| Authors: | Zhang Xiangdong Wang Zhihua |
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| Abstract: | In this paper, the theory of experimental modal analysis is discussed and a cantilever beam is chose to provide data for the analysis. The shift of modal frequency caused by structural damage is studied based on the experimental modal analysis. A new method of strain curvature mode is proposed relative to the displacement mode, and principal shortcomings of this method are discussed. The displacement mode is compared with the strain mode, and the results indicate that the strain signature is more sensitive to damage. |
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| Keywords: | experimental modal analysis damage detection displace mode strain mode |
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