Structural damage alarming by novelty detection technique based on modal flexibility

被引：0
|
作者：
Sun, ZG [1 ]
机构：
[1] Dalian Maritime Univ, Dalian, Liaoning, Peoples R China
来源：
PROCEEDINGS OF THE FIFTEENTH (2005) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4 | 2005年
关键词：
damage alarming; neural network; novelty detection; modal flexibility;
D O I：
暂无
中图分类号：
U6 [水路运输]; P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Structural damage alarming is explored by using novelty detection technique. Based on the changes of modal flexibilities, a novelty index to alarm damage is generated by a feed-forward BP neural network. A total of 12 potential damage cases in a cable-stayed bridge are simulated. Modal flexibilities are evaluated using noisy 'measured' modal parameters. The results show that the novelty index based on flexibility has a high sensitivity to damage and a good tolerance to the noise. In this technique, no structural model is needed. Only a few of low-order modal parameters at several locations are to be measured.
引用
收藏
页码：419 / 423
页数：5
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