改进的模态曲率改变率损伤识别方法研究  

Damage identification based on improved modal curvature index

作　　者：刘玲玉 熊峰[2] 李拨[3] 

机构地区：[1]成都市人防建筑设计研究院,四川成都610015 [2]四川大学建筑与环境学院,四川成都610065 [3]成都建筑材料工业设计研究院,四川成都610021

出　　处：《四川建筑科学研究》2010年第1期76-79,共4页Sichuan Building Science

摘　　要：研究了适用于简支梁和连续梁结构的改进的模态曲率改变率的损伤识别方法,比较了改进的模态曲率改变率法与模态曲率改变率法。对简支梁和连续梁不同损伤位置损伤程度的数值计算表明,改进的模态曲率改变率法可以准确地判断损伤位置,定性地判断同一位置处的损伤程度。A damage identification approach applied to simple beams and continuous beams, named improved modal curvature index was studied. Improved modal curvature index and modal curvature index were compared. The damage of various position and degree in simple beams and continuous beams was computed. A simulated experiment illustrated that this method would detect crack location preferably and give a qualitative description for the damage degree.

关 键 词：损伤检测 曲率模态 无损探伤 振动特性 

分 类 号：TU375.1[建筑科学—结构工程]