基于模态分析的结构损伤检测方法研究  

Damage Detection in Structures by Modal Analysis

作　　者：高芳清[1] 金建明[1] 高淑英[1] 

机构地区：[1]西南交通大学应用力学与工程系

出　　处：《西南交通大学学报》1998年第1期108-113,共6页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金

摘　　要：为探讨基于振动模态分析的结构无损检验技术，把“频率变化平方比”应用于钢桁架这样的复杂结构，从理论上验证了该参数的变化是结构损伤程度和位置的函数。通过数值模拟证明了利用该参数对判断钢桁架结构的微小损伤效果显著，使发展新的、有效和简便的大型桁架结构的损伤检测方法成为可能。A nondestructive　testing technique based on modal analysis is discussed in order to develop a new, efficient and simple damage detection method for large structures. The “frequency change ratio” is applied as a parameter to complex structures such as trusses. It is verified theoretically that this parameter is a function of the severity of deterioration and the location of the damage in a structure. It is also shown, through a simulation, that this parameter could be used to detect small damages in trusses efficiently.

关 键 词：模态分析 无损检测 桁架 损伤 结构 

分 类 号：TU323.401[建筑科学—结构工程]