| ERA法识别大型结构损伤与定位 |
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| 引用本文： | 张枢文,嵇春艳,吴立人.ERA法识别大型结构损伤与定位[J].江苏科技大学学报(社会科学版),2007,21(3):17-21. |
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| 作者姓名： | 张枢文 嵇春艳 吴立人 |
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| 作者单位： | 江苏科技大学船舶与海洋工程学院 江苏镇江212003 |
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| 摘 要： | 大型结构物的重要性不言而喻,一旦结构物发生损伤,如何对结构进行实时损伤监测,是一个有价值的研究方向。特征系统算法(ERA)是近年来出现的时域模态参数识别技术。本文阐述了该算法的基本原理和具体实现方法,采用一典型的数值算例考核了ERA方法的可行性及其抗噪能力,实施了结构模型的模态参数辨识。计算结果表明该方法能够对结构物在发生质量和刚度的损伤时,实时有效的损伤识别与定位。
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| 关 键 词： | 参数识别 脉冲响应 模态频率 损伤 |
| 文章编号： | 1673-4807（2007）03-0017-05 |
| 修稿时间： | 2006-09-30 |
Identification and Orientation of Structural Damage with ERA Method |
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| ZHANG Shuwen,JI Chunyan,WU Liren.Identification and Orientation of Structural Damage with ERA Method[J].Journal of Jiangsu University of Science and Technology:Natural Science Edition,2007,21(3):17-21. |
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| Authors: | ZHANG Shuwen JI Chunyan WU Liren |
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| Institution: | School of Naval Architecture and Ocean Eng. , Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, China |
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| Abstract: | Due to the importance of the safety of huge structures,it is necessary to inspect the structural damage in real time.The ERA(eigensystem realization algorithm) is a method for modal parameter identification in time domain.The basic theory and the particular method of the ERA are given.A typical numerical example is adopted to investigate the feasibility of the ERA program with its anti-noise ability.The method can be successfully used in the identification of the structural modal parameters.The numerical results indicate that the location of the damage can be detected effectively when the change of the mass and the rigidity of the system occurs. |
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| Keywords: | parameter identification impulse response mode frequency structural damage |
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