噪声与振动控制

噪声与振动控制 ›› 2013, Vol. 33 ›› Issue (3): 226-230.DOI: 10.3969/j.issn.1006-1335.2013.03.051

• 6.信号处理与故障诊断 • 上一篇    下一篇

频率变化平方比向量确定结构损伤位置

董五安，杨世浩   

  1. （ 中国地质大学(武汉)  工程学院，  武汉  430074 ）
  • 收稿日期:2012-07-26 修回日期:2012-09-14 出版日期:2013-06-18 发布日期:2013-06-18
  • 通讯作者: 董五安

Identification of Structure Damage Positioning Using     Frequency-change Square Ratio Vector

  • Received:2012-07-26 Revised:2012-09-14 Online:2013-06-18 Published:2013-06-18

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摘要： 损伤定位在结构损伤检测中处于基础和关键的地位。能否准确找出损伤位置，决定了损伤识别的成败。因此，提出频率变化平方比向量置信准则。该方法仿照模态置信准则（MAC）的建立方式，以频率变化平方比是损伤位置的函数这一理论而建立的。分别计算实际测试或者理论的频率变化平方比向量和相应频率下单元变形为基础的频率变化平方比向量。按照置信准则，计算两个向量的相关性。以相关性来判定损伤是否发生在该单元。

关键词: 振动与波, 损伤位置, 频率变化, 置信准则, 相关性

Abstract: Positioning damage in key positon in the course of damage detection of structures.To find out whether accurate damage location determine the success or failure of damage identification.Therefore based on the concept that frequency change square ratio is the function of damage loction and the theory of modal assurance criterion(MAC),estabished the concept of frequency change squrae ratio vector assurance criterion . Calculated the frequency change squre ratio by the actual test or computing frequency and by the element deformation .According to the assurance criterion calculated the correlation of two vector.Make use of the correlation to determine the damage loction.

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