Three-Step Damage Identification Method Based on Dynamic Characteristics

A three-step damage identification method based on dynamic characteristics is proposed to improve the structure reliability and security and avoid serious accident. In the proposed method, the frequency and difference of modal curvature （DMC） are used as damage indexes. Firstly, the detection of the...

Full description

Saved in:
Bibliographic Details
Published in:Transactions of Tianjin University 2014-10, Vol.20 (5), p.379-384
Main Author: 孙国帅 柳春光 张士博 郝二通
Format: Article
Language:English
Subjects:
Engineering
Humanities and Social Sciences
Mechanical Engineering
multidisciplinary
Science
严重事故
动态特性
损伤位置
损伤因子
损伤指标
模态曲率
识别方法
频率变化
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A three-step damage identification method based on dynamic characteristics is proposed to improve the structure reliability and security and avoid serious accident. In the proposed method, the frequency and difference of modal curvature （DMC） are used as damage indexes. Firstly, the detection of the occurrence of damage is addressed by the frequency or the square of frequency change. Then the damage location inside the structure is measured by the DMC. Finally, with the stiffness reduction rate as a damage factor, the amount of damage is estimated by the optimization algorithm. The three-step damage identification method has been validated by conducting the simulation on a cantilever beam and the shaking table test on a submerged bridge. The results show that the method proposed in this paper can effectively solve the damage identification problem in theory and engineering practice.
ISSN:1006-4982
1995-8196
DOI:10.1007/s12209-014-2115-z