| An Improved Damage Identification Method Based on Mode Information |
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| 作者姓名： | YANG Fengyan YANG Yongchun |
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| 作者单位： | Engineering College, Ocean University of China, Qingdao 266071, P. R. China |
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| 摘 要： | This paper presents a new algorithm to predict locations and severities of damage in structures by changing modal parameters. An existing algorithm of damage detection is reviewed and the new algorithm is formulated to improve the accuracy of damage locating and severity estimation by eliminating the ＂erratic assumptions and limits in the existing algorithm. The damage prediction accuracy is numerically assessed for each algorithm when applied to a two-dimensional frame structure for which pre-damage and post-damage modal parameters are available for only a few modes of vibration. The analysis results illustrate the improved accuracy of the new algorithm when compared to the existing algorithm.
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| 关 键 词： | 非破坏性检测 损伤识别 模型参数 结构损伤 海洋工程 |
| 收稿时间： | 2005-09-07 |
| 修稿时间： | 2006-03-27 |
An improved damage identification method based on mode information |
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| YANG Fengyan YANG Yongchun.An Improved Damage Identification Method Based on Mode Information[J].Journal of Ocean University of China,2006,5(3):273-277. |
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| Authors: | Yang Fengyan Yang Yongchun |
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| Institution: | Engineering College, Ocean University of China, Qingdao 266071, P.R.China |
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| Abstract: | This paper presents a new algorithm to predict locations and severities of damage in structures by changing modal parameters. An existing algorithm of damage detection is reviewed and the new algorithm is formulated to improve the accuracy of damage locating and severity estimation by eliminating the erratic assumptions and limits in the existing algorithm. The damage prediction accuracy is numerically assessed for each algorithm when applied to a two-dimensional frame structure for which pre-damage and post-damage modal parameters are available for only a few modes of vibration. The analysis results illustrate the improved accuracy of the new algorithm when compared to the existing algorithm. |
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| Keywords: | structural damage nondestructive detection damage identification modal analysis |
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