A Step-by-Step Damage Identification Method Based on Frequency Response Function and Cross Signature Assurance Criterion

Sensors

Mohammad Siahkouhi¹  Fei Zhang¹  Jiawang Zhan¹ 

[1] School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;

关键词: structural health monitoring;    damage identification;    frequency response function (FRF);    model updating;    simply supported beam;    cross-signature assurance criterion (CSAC);   

DOI  :  10.3390/s21041029

来源: DOAJ

【 摘 要 】

This paper aims to present a method for quantitative damage identification of a simply supported beam, which integrates the frequency response function (FRF) and model updating. The objective function is established using the cross-signature assurance criterion (CSAC) indices of the FRFs between the measurement points and the natural frequency. The CSAC index in the frequency range between the first two frequencies is found to be sensitive to damage. The proposed identification procedure is tried to identify the single and multiple damages. To verify the effectiveness of the method, numerical simulation and laboratory testing were conducted on some model steel beams with simulated damage by cross-cut sections, and the identification results were compared with the real ones. The analysis results show that the proposed damage evaluation method is insensitive to the systematic test errors and is able to locate and quantify the damage within the beam structures step by step.

【 授权许可】

Unknown