A new damage detection indicator for beams based on mode shape data

Yazdanpanah, Omid; Seyedpoor, S. M.; Bengar, Habib Akbarzadeh

doi:10.12989/sem.2015.53.4.725

Cited by 48 publications

(30 citation statements)

References 16 publications

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“…Another damage indicator based on the mode shape and its derivatives (MSDBI) 1 is suggested in [18] to identify the location of structural damage in beams. The MSDBI is defined as follows…”

Section: Mode Shape Derivatives-based Damage Detection Methodsmentioning

confidence: 99%

“…Also, Φ (q,i) and Φ (q,i) define the mode shape curvature and the mode shape slope of the beam, respectively. The normalized form of this index (nMSDBI) which is introduced in [18] is used for detecting the damage positions in this research:…”

Section: Mode Shape Derivatives-based Damage Detection Methodsmentioning

confidence: 99%

“…Damage identification in plate-like structure using mode shape derivatives Fig. 4 The result of damage identification using: a Wavelet transform modulus using rbio5.5 wavelet based on experimental data [16], b nMSDBI (noise free) [18], c the proposed damage index (noise free), d the proposed damage index (1 % noise), e the proposed damage index (3 % noise) Figure 4 compares the ability of the proposed damaged index in detecting the above mentioned damage scenario in comparison with that of the two-dimensional continuous wavelet transform (which was based on experimental data) and also, the result of the normalized form of the damage index proposed by [18] (nMSDBI) which was described previously at the end of Sect. 2 (Fig.…”

Section: Validation Of the Proposed Damage Methods By Experimental Studymentioning

confidence: 99%

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Damage identification in plate-like structure using mode shape derivatives

et al. 2015

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In this paper, a new damage indicator based on modal data, such as mode shapes and its derivatives, is presented for damage identification in plate-like structures. The proposed indicator is determined using modal analysis information extracted from a finite element code in MATLAB. After obtaining the mode shapes, the slope and curvature of the plate in each mode are calculated based on central finite difference methods. A numerical example with and without noise is considered to evaluate the exact location of different damage scenarios. In order to validate the proposed indicator for structural damage detection, the obtained results have been compared with another study which was based on experimental data. Moreover, in order to better assess the performance of the proposed indicator, a comparison has been made between the proposed indicator and two well-known indicators found in the literature. The results indicate that the proposed damaged indicator is able to detect precisely the location of single and multiple damage cases having different characteristics in plate-like structures.

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“…Another damage indicator based on the mode shape and its derivatives (MSDBI) 1 is suggested in [18] to identify the location of structural damage in beams. The MSDBI is defined as follows…”

Section: Mode Shape Derivatives-based Damage Detection Methodsmentioning

confidence: 99%

Section: Mode Shape Derivatives-based Damage Detection Methodsmentioning

confidence: 99%

Section: Validation Of the Proposed Damage Methods By Experimental Studymentioning

confidence: 99%

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Damage identification in plate-like structure using mode shape derivatives

et al. 2015

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“…Therefore, the authors proposed to improve the curvature with wavelet transform and a Teager energy operator. Further, in order to improve the results of damage detection, Yazdanpanah et al [12] proposed utilizing both the mode shape slope and mode shape curvature. Rucevskis et al [13,14] demonstrated that the data of the intact structure have a smooth surface.…”

Section: Introductionmentioning

confidence: 99%

Crack Detection through the Change in the Normalized Frequency Shape

Dahak¹,

Touat²,

Benkedjouh³

2018

Vibration

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Abstract:The objective of this work is to use natural frequencies for the localization and quantification of cracks in beams. First, to study the effect of the crack on natural frequencies, a finite element model of Euler-Bernoulli is presented. Concerning the damaged element, the stiffness matrix is calculated by the theory of fracture mechanics, by inverting the flexibility matrix. Then, in order to detect damage, we are going to show that the shape given by the change in the natural frequencies is as function of the damage position only. Thus, the crack is located by the correlation between the shape of the measured frequencies and those obtained by the finite elements, where the position that gives the calculated shape which is the most similar to the measured one, indicates the crack position. After the localization, an inverse method will be applied to quantify the damage. Finally, an experimental application is presented to show the real applicability of the method, in which the crack is introduced by using an Electrical Discharge Machining. The results confirm the applicability of the method for the localization and the quantification of cracks.

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“…The damage indicator using mode shape data to identify damage in beam-like structures has been studied [6]. Xiang et al [7], in their work, have presented the most exciting damage detection methods using modal curvature and investigated the changes of the damage indicator between the intact and damaged state.…”

Section: Introductionmentioning

confidence: 99%