| 通过频率改变率进行损伤定位的方法研究 |
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| 引用本文： | 刘文峰,柳春图,应怀樵.通过频率改变率进行损伤定位的方法研究[J].振动与冲击,2004,23(2):28-30,17. |
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| 作者姓名： | 刘文峰 柳春图 应怀樵 |
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| 作者单位： | 1. 中国科学院力学研究所,北京,100080
2. 东方振动和噪声技术研究所,北京,100085 |
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| 摘 要： | 本文基于频率法进行损伤识别的基础，从理论上推导了损伤导致某阶频率降低与损伤位置的关系和该阶曲率模态／应变模态的振型变化相近。并通过数值仿真的结果验证了理论分析的结果。在此基础上给出了损伤状态下通过不同阶模态频率改变率比值来进行损伤定位的新方法，并将其应用于实际钢梁的分析中，得到了较好的结果。最后文中阐述了通过频率法进行损伤识别的优点和局限性。
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| 关 键 词： | 损伤定位 频率法 损伤识别 仿真 钢梁 曲率模态振型 |
Research on Damage Orientation by Change of Eigenfrequency |
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| liu Wenfeng,Liu Chuntu,Ying Huaiqiao.Research on Damage Orientation by Change of Eigenfrequency[J].Journal of Vibration and Shock,2004,23(2):28-30,17. |
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| Authors: | liu Wenfeng Liu Chuntu Ying Huaiqiao |
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| Affiliation: | liu Wenfeng 1 Liu Chuntu 1 Ying Huaiqiao 2 |
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| Abstract: | By virtue of damage identification in frequency domain,the relationship between the structural eigenfrequency and damage location is deduced theorelically.It is like an identification method in accordance with the change of curvature modal shape or strain modal shape.The procedure is verified by numerical simulations.On this basis,a new method of damage positioning is presented based on the change inspection of multiple orders of modal frequencies calculation results.It shows good effect when applying the method on a real steel beam.Virtues and limitations of the method are also discussed. |
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| Keywords: | eigenfrequency curve modal shape damage orientation |
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