结构敏感频段的提取及其在损伤识别中的应用  

Structure Sensitive Frequency Band Dividing Method and its Application in Damage Identification

作　　者：冉志红[1] 缪升[1] 屈俊童[1] 

机构地区：[1]云南大学城市建设与管理学院,云南昆明650091

出　　处：《公路工程》2010年第1期67-71,共5页Highway Engineering

基　　金：云南大学校立基金(2007Q011B);云南省科技厅计划项目(2008CD078)

摘　　要：对于某一特定的结构来说,通过危险性分析,能够找到最可能发生损伤的构件。结构损伤识别可以只对这些构件进行研究分析,进而滤去那些不必要的识别变量,减小损伤识别数值计算的规模。由于特定构件的损伤只引起某些特定频段振动特性的改变,因此可以从全频段时程数据中提取出这些对危险构件较为敏感的频段数据进行单独分析。最后提出了结构敏感频段的提取方法,介绍了敏感频段在结构损伤识别中的应用。The dangerous members can be found by analyzing some structure＇ s characteristic. It only researched on the dangerous members with structure damage identification, and reduced numerical calculation complexity through ignoring a large number of variables which need be identified. Because the damage of specifically members caused changes of specifically frequency band, the sensitive frequency band for these dangerous members can be divided for these data of full frequency band. In this paper, the method for dividing the sensitive frequency band was brought forward, and was intruded into structure damage identification.

关 键 词：工程结构 损伤识别 敏感频段 小波包 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]