Crack detection in beams using experimental modal data and finite element model

Nahvi, Hassan; Jabbari, Majid

doi:10.1016/j.ijmecsci.2005.06.008

Cited by 156 publications

(77 citation statements)

References 14 publications

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“…Agarwalla et al 4 have experimentally analysed effect of an open crack on the modal parameters of the cantilever beam subjected to free vibrations and compared with results obtained from the numerical method. Nahy and Jabbari 5 have established an analytical as well as experimental approach for crack detection in cantilever beams by vibration analysis. An experimental setup was designed in which a cracked cantilever beam is excited by a hammer and the response is obtained by an accelerometer attached to the beam.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigations on Effect of Notch on Performance Evaluation of Cantilever Beams

Gawande¹,

More²

2017

IJAV

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It is required that any structure must work properly during its service life time. However, due to the internal damage of structures, there may be a chance of breakdown. Therefore, structures require regular costly inspection. During the last few decades, vibration-based fault detection methods are mostly used due to their simplicity for implementation. During operation, all structures are subjected to degenerative effects that may cause initiation of structural fault such as cracks or notch that lead to the disastrous failure or collapse of the structure. It is seen that as crack or notch starts generating, there is a change in natural frequencies. This research work focuses on the examination of these changes, which is useful for identification of notch position. In this paper, the detailed analysis of cantilever beam with and without notch has been done using finite element method with the help of ANSYS and using modern national instruments LabVIEW software. This method provides the information regarding the detection, location, and characterization of the damage in the structure. This paper includes the study of dynamic properties of cantilever beams subjected to free vibration under the influence of notch at different positions along the length.

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Section: Literature Reviewmentioning

confidence: 99%

Investigations on Effect of Notch on Performance Evaluation of Cantilever Beams

Gawande¹,

More²

2017

IJAV

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“…그 중 Lee, Y. S. 는 고유진동수를 이용하 여 크랙을 탐지하는 방법에 대하여 연구하여 왔고 있다. 이 방법은 두 가지 이상의 진동 특성치를 필요로 한다 [2][3][4] .…”

Section: 서 론unclassified

Vibration Characteristics of Cantilever Beam with a Crack

Kim¹,

Jo²,

Yoon³

2014

Journal of the Korean Society of Manufacturing Technology Engin

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ARTICLE INFO ABSTRACTArticle history:In this paper, the natural frequency and damping ratio are analyzed with the acceleration signal of an Euler-Bernoulli beam using the impact hammer test. The results are presented according to crack depth and position using the recursive least squares method. The results are compared and investigated with FEM analysis of CATIA. Both methods agree well with each other regarding the natural mode characteristics. The captured acceleration can be used for the calculation of the natural frequency and damping ratio using time series methods that are based on the measured acceleration. Using these data, a recursive time series model with the acceleration signal was configured and the behaviors of the natural frequency and damping ratio were investigated and analyzed. Finally, the results can be used for the prediction of crack position and depth under different crack conditions for an Euler-Bernoulli beam.

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“…When the changing rates of the mth step natural frequencies are known, the linear equation can be expressed in Equation 29 (Nahvi and Jabbari, 2005 …”

Section: Theory Model Of Wavelet Analysismentioning

confidence: 99%

Identification of Multi-Cracks in the Gate Rotor Shaft Based on the Wavelet Finite Element Method

Zhao¹

2013

American Journal of Engineering and Applied Sciences

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In order to have fault identification for the gate rotor shaft with multiple cracks effectively, the quantity identification method of the gate rotor shaft with multiple cracks based on wavelet finite element method is established and the frequency test of the gate rotor shaft based on blind source separation algorithm is analyzed. Firstly the wavelet finite element was established by combining the Daubechies wavelet theory and the traditional finite element theory and then the vibration equations of intact and cracked wavelet finite element were obtained, which were applied to compute the changing rate of the natural frequencies for the cracked gate rotor shaft. Then natural frequencies fitting curve surface of the cracked gate rotor shaft with were acquired based on the wavelet finite element method and the identification procedure of the cracks was confirmed and the gate rotor shaft with two different cracks was analyzed and the results showed that the wavelet finite element could predict the multi-cracks correctly.

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Crack detection in beams using experimental modal data and finite element model

Cited by 156 publications

References 14 publications

Investigations on Effect of Notch on Performance Evaluation of Cantilever Beams

Investigations on Effect of Notch on Performance Evaluation of Cantilever Beams

Vibration Characteristics of Cantilever Beam with a Crack

Identification of Multi-Cracks in the Gate Rotor Shaft Based on the Wavelet Finite Element Method

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