| 线性结构振动亏损系统的实验模态分析 |
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| 引用本文： | 时国勤,诸德超.线性结构振动亏损系统的实验模态分析[J].振动工程学报,1993,6(1):20-28. |
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| 作者姓名： | 时国勤 诸德超 |
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| 作者单位： | 北方交通大学土建系，北京航空航天大学固体力学研究所，北京航空航天大学固体力学研究所 北京，100044，北京，100083，北京，100083 |
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| 摘 要： | 本文设计了一个用速度反馈实现粘性阻尼的结构振动系统并进行了实验和模态参数识别，实验模态分析结果表明，具有非比例阻尼的结构振动系统，在欠阻尼范围内，系统是可以成为亏损的；对于亏损系统，其频响特性只有用广义模态理论才能正确地描述。
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| 关 键 词： | 亏损系统 振动实验 广义模态 模态分析 |
The Experimental Modal Analysis of the Linear Structural Vibration Defective Systems |
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| Shi Guoqin Dept. of Civil Engr.,Northern Jiaotong University Beijing, Zhu Dechao, Wang Junkui Institute of Soil Mechanics,Beijing University of Aeronautics and Astronautics Beijing.The Experimental Modal Analysis of the Linear Structural Vibration Defective Systems[J].Journal of Vibration Engineering,1993,6(1):20-28. |
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| Authors: | Shi Guoqin Dept of Civil Engr Northern Jiaotong University Beijing Zhu Dechao Wang Junkui Institute of Soil Mechanics Beijing University of Aeronautics and Astronautics Beijing |
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| Affiliation: | Shi Guoqin Dept. of Civil Engr.,Northern Jiaotong University Beijing,100044 Zhu Dechao, Wang Junkui Institute of Soil Mechanics,Beijing University of Aeronautics and Astronautics Beijing,100083 |
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| Abstract: | In the present paper, a structural vibration system with viscous damping which is simulated by a velocity fecdback is designed, the dynamical experiments and the modal parameter identifications are performed. The results of the experiments and the identifications show that the structural vibration system with non-proportional damping may become a defective system within underdamped case and frequency-response properties of a defective system can be correctly expressed only by the generalized mode theory. |
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| Keywords: | : defective system dynamical experiment generalized mode parameter identification |
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