基于动力特性的结构损伤识别方法
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摘要
介绍了一种基于结构动力特性变化的损伤识别方法.通过引入一个损伤分布函数,讨论了均质等截面BernoulliEuler梁的动力响应,构造出“损伤影响矩阵”.该矩阵反映了结构由于损伤所引起的振型耦合,最后介绍了基于损伤影响矩阵的结构损伤定位和评估方法.
A structural dynamic properties-based damage identification method was proposed. The dynamic response of the uniform Bernoulli-Euler beam was discussed by introducing a damage distribution function, and a “damage influence matrix(DIM)" was constructed, which can show the structural modal coupling induced by damage. The method of structural damage location and assessment based on DIM was also introduced.
A structural dynamic properties-based damage identification method was proposed. The dynamic response of the uniform Bernoulli-Euler beam was discussed by introducing a damage distribution function, and a “damage influence matrix(DIM)" was constructed, which can show the structural modal coupling induced by damage. The method of structural damage location and assessment based on DIM was also introduced.
引文
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2 SalawuOS.Detectionofstructuraldamagethrough changesinfrequency.Areview.EngngStruct,1997,19(9):718～723.
3 PandeyAK,BiswasM.Damagedetectionfromchangesin curvaturemodeshapes.Journalofsoundandvibration,1991,145:321～332.
4 UsikLee,JinhoShin.Afrequencyresponsefunction basedstructuraldamageidentificationmethod.Computers andstructures,2002,80:117～132.
5 李国强等.弯剪型悬臂结构损伤识别的柔度法.地震工程与工程振动.1999,19(1):31～37(LiGuoqiang,Hao Kunchao.Adeflectionapproachfordamageidentification ofcantilever typestructureswithbendingandsheardefor mation.EarthquakeEngineeringandEngineeringVibra tion,1999,19(1):31～37(inChinese)).