基于模态参数进行连续梁损伤诊断的数值研究  

A NUMERICAL STUDY ON DAMAGE DIAGNOSIS OF A CONTINUOUS BEAM USING MODAL PARAMETERS

作　　者：郭国会[1] 易伟建[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《振动与冲击》2001年第1期72-75,共4页Journal of Vibration and Shock

摘　　要：以一矩形等截面二跨梁有限元模型为研究对象 ,通过数值模拟 ,利用梁损伤前后一阶振型的改变率、前四阶振型曲率的绝对差值以及两个特征参数 ,分别实现了连续梁的损伤诊断。In the paper, a finite element model of a uniform cross sectional two-spam continuous beam is chosen to be studied. Through numerical simulation, beam damage diagnosis is realized by computing the first order modal shape change ratio, the absolute difference between the curvature mode shapes and two other eigenparameters of the intact and the damaged beam respectively.

关 键 词：振型曲率 特征参数 损伤诊断 改变率 连续梁 振动信号分析 

分 类 号：TU312.3[建筑科学—结构工程] TU311.3