基于动静测试融合灵敏度的结构损伤识别方法
首发时间:2012-12-17
摘要:基于静力位移和固有频率灵敏度矩阵,提出利用两种动静测试数据的融合灵敏度结构损伤识别方法。利用位移响应对局部损伤敏感效应与固有频率对全部结构振动特性整体度量,将两种不同类型的响应数据在灵敏度级别进行融合,实现灵敏度矩阵更加灵敏,并提出融合准则DIFC(Damage Identification Fusion Criterion)。本文给出了融合灵敏度结构损伤识别方法详细的分析步骤。利用数值算例对所提方法进行验证,并将识别结果与两种单工况灵敏度方法计算相比较。结果表明所提方法是合理可行的。
关键词: 损伤识别 灵敏度矩阵 静力位移 固有频率 信息融合
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Structure Damage Identification Method Based on Fusion Sensitivity with Dynamic and Static Test
Abstract:Based on the displacement and frequency sensitivity matrix, this paper presented a structure damage identification method by using two kinds of dynamic and static test data. Take advantage of the sensitive effects of local damage by the displacement responses and the whole measurements of structural vibration characteristics by natural frequencies , this method make a fusion of two different types of response data in the level of sensitivity. It can make sensitivity matrix more sensitive. This paper also proposes a fusion Criterion: DIFC (Damage Identification Fusion Criterion). The detail analysis of the steps of the fusion sensitivity structural damage identification method was given. The proposed approach is demonstrated and compared with the two single load cases sensitivity method on one numerical example, and the results can prove the proposed method veracity and practicability.
Keywords: damage identification sensitivity matrix displacement frequency information fusion
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