DETECTION OF DAMAGE LOCATION IN BEAMS USING DISCRETE WAVELET ANALYSIS | ||||
| The Egyptian International Journal of Engineering Sciences and Technology | ||||
| Article 4, Volume 26, EIJEST, Vol. 26, 2018, November 2018, Page 29-37 PDF (1.17 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eijest.2018.97262 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A Bakry* 1; S Mourad2; S Selmy3 | ||||
| 1Professor of structural analysis, Zagazig University, Egypt | ||||
| 2Professor of steel structures, Cairo University, Egypt | ||||
| 3Ph.D Student, Structural Eng.Dept.Cairo. | ||||
| Abstract | ||||
| Damage detection in structures using vibration analysis has been a subject of intensive investigation for the last two decades. In this paper, a method for damage detection using wavelet analysis is presented. MATLAB program is prepared to simulate a beam, calculate its mode shapes and analyze the first mode shape by discrete wavelet analysis. The first mode shapes of damaged and undamaged beams are transformed to the wavelet domain. The difference of the detail coefficients of damaged and undamaged mode shapes displays accurately the damage location. A detailed parametric study was conducted by changing the damage location, intensity as well as the boundary conditions and wavelet families. These studies have indicated that discrete wavelet transform accurately predicts the damage location (single or multi damages) from analyzing the first mode shape. | ||||
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