Suppressing damage identification errors from selected natural frequencies and mode shape points
Suppressing damage identification errors from selected natural frequencies and mode shape points
复制标题
抑制所选固有频率和模态振型点的损伤识别错误
DOI:
10.1080/17415977.2011.589902
复制
发表时间:
2012-10
影响因子:
1.3
通讯作者:
Longqi Wang
中科院分区:
文献类型:
--
作者:
Zhihai Xiang;Masheng Zhou;Longqi Wang
This article presents a damage identification method based on structural natural frequencies and mode shape points. According to the well-posedness analysis of this method, an algorithm is proposed to find the optimal combination of natural frequencies and mode shape points. Then, an integrated scheme that consists of the optimal point selection, the damage identification and the measurement noise updating is presented. In such a way, the damage identification errors due to measurement noises can be greatly suppressed. Numerical examples demonstrate that although structural damage parameters are very sensitive to the measurement noises, especially the noises in natural frequencies, they can be reliably identified if the natural frequencies and mode shape points are properly selected using the proposed method.
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DOI:
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