Damage detection method of multi-DOF structure based on duffing oscillator and response sensitivity

被引：0

作者：

Liu, Liu ^{[1
]}

Yan, Yunju ^{[1
]}

Chang, Xiaotong ^{[1
]}

Xi, Zhuyou ^{[1
,2
]}

机构：

[1] School of Mechanics, Civil and Architecture, Northwestern Polytechnical University, Xi'an, 710072, China

[2] School of Science, Liaoning University of Technology, Jinzhou, 121000, China

来源：

Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | 2014年 / 34卷 / 03期

关键词：

Oscillators (mechanical) - Structural analysis - Location;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Chaos characteristics of the Holmes Duffing equation are described, and the mechanism of its application on detecting a weak signal from strong background noise is elaborated. As for the problem of identifying structural damage in a strong noise environment, a damage location method based on the Holmes Duffing equation and the response sensitivity method is proposed. A set of specific parameters is selected for the extraction of a response signal, thus avoiding the cumbersome process of the traditional Duffing oscillator parameters selection. A higher noise level is also considered, and the noise calculation result is less under the same noise level. This method is applied to the three-dimensional structure model, and the results show that this method can effectively detect the location of structural damage under strong background noise, which can provide a better methodology for structural damage identification.

引用

页码：473 / 478