基于结构模态参数的两种损伤识别方法的比较  

The Comparison of Two Kinds of Damage Identification Methods Based on Structural Modal Parameters

作　　者：韦健 徐典[2] 张威[3] 万雨田 

机构地区：[1]洛阳市规划建筑设计研究院有限公司西南分公司,重庆400030 [2]重庆科技学院建筑工程学院,重庆401331 [3]天津市地质工程勘察院,天津300191 [4]苏州立诚建筑设计院有限公司,江苏昆山215300

出　　处：《工程建设与设计》2015年第4期36-38,共3页Construction & Design for Engineering

摘　　要：对结构的损伤识别方法进行了研究,以最容易获得的结构动态参数频率为基础。研究采用柔度差作为识别指标,对结构的损伤进行判断定位。以一简支梁为例,通过有限元数值模拟了不同程度的损伤,分别提取结构损伤前后的低阶频率。然后分别采用一阶振型指标和柔度差指标进行损伤定位。结果表明,柔度差指标优于一阶振型指标能够更好地进行损伤定位。Studied the structure damage identification methods, with the most easy to obtain frequency based on the structural dynamic parameters. It has been studied that fiexibility differecnce using as identification index for damage localization. Take a simple beam as example, Through the finite element numerical simulation of the different degrees of damage, and get respectively low-order modal of the structure before and after damage. Then using the first-order vibration mode and fiexibility differecnce as identification index to locate damage, the result shows that fiexibility differecnce index is superior to the first-order vibration mode index

关 键 词：结构损伤 识别指标 一阶振型 柔度差 

分 类 号：TU375.1[建筑科学—结构工程]