基于自振频率的悬臂梁损伤识别方法  

Application of Eigenfrequency for Damage Detection and Location for Cantilever Beam

作　　者：田玉滨[1] 闫维明[2] 高振闯[1] 胡世强[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [2]北京工业大学建筑工程学院,北京100022

出　　处：《结构工程师》2011年第B01期300-305,共6页Structural Engineers

基　　金：城市与工程安全减灾教育部重点实验室开放基金(EESR2009-07)

摘　　要：梁的损伤识别是损伤检测理论中最基本、最具有代表性意义的工作。寻找基于频率的结构损伤识别和定位的参数,并证明这些参数仅与损伤的位置有关,而与结构损伤程度无关。然后建立悬臂梁损伤定位通用频率指纹库,并通过数值算例和具体试验验证该频率指标用于悬臂梁损伤定位的有效性、实用性及其准确性。最终找到一种比较实用的悬臂梁损伤定位方法,从而为结构损伤识别理论在工程实际的应用提供方便。Damage detection of beams is the most essential and representative work in damage identification of structures. The parameters on the basis of eigenfrequency are determined and it is also proved that those pa- rameters are only related to the damage location instead of the damage state. Then a general frequency data warehouse for the damage location of cantilever beams is established. After that, numerical examples and specific experiments are taken to testify the effectiveness, validity and accuracy of the frequency index for damage detection of cantilever beam. Finally, this practical theory would provide convenience in practical engineering application.

关 键 词：损伤识别 悬臂梁 损伤定位 自振频率 

分 类 号：TU317[建筑科学—结构工程]