Non-linearities in the vibrations of elastic structures with a closing crack: A state of the art review

Bovsunovsky, A.; Surace, Cecilia

doi:10.1016/j.ymssp.2015.01.021

Cited by 157 publications

(81 citation statements)

References 117 publications

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“…The second case study concerns the spar of a prototype wing, the linear and nonlinear dynamics of which have been investigated in recent studies [62,63]. Importantly, the prototype skin is supposed to completely transfer the aerodynamic loads to the spar, making the structural behaviour of the latter a good approximation of the dynamical response of the whole spar-skin ensemble.…”

Section: High Aspect Ratio Flexible Wingmentioning

confidence: 99%

The Teager-Kaiser Energy Cepstral Coefficients as an Effective Structural Health Monitoring Tool

et al. 2019

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Recently, features and techniques from speech processing have started to gain increasing attention in the Structural Health Monitoring (SHM) community, in the context of vibration analysis. In particular, the Cepstral Coefficients (CCs) proved to be apt in discerning the response of a damaged structure with respect to a given undamaged baseline. Previous works relied on the Mel-Frequency Cepstral Coefficients (MFCCs). This approach, while efficient and still very common in applications, such as speech and speaker recognition, has been followed by other more advanced and competitive techniques for the same aims. The Teager-Kaiser Energy Cepstral Coefficients (TECCs) is one of these alternatives. These features are very closely related to MFCCs, but provide interesting and useful additional values, such as e.g., improved robustness with respect to noise. The goal of this paper is to introduce the use of TECCs for damage detection purposes, by highlighting their competitiveness with closely related features. Promising results from both numerical and experimental data were obtained.

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Section: High Aspect Ratio Flexible Wingmentioning

confidence: 99%

The Teager-Kaiser Energy Cepstral Coefficients as an Effective Structural Health Monitoring Tool

et al. 2019

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“…The relationship between crack parameters and 2× amplitudes at 1/3 critical speed can be written as: Y = f(l, d) = f(x), where, l and d are vectors for crack locations and crack depths respectively and x is the crack parameters set. Specifically, the relationships for measurement points A and B are Y 1…”

Section: Construction Of the Crack Kriging Surrogate Modelmentioning

confidence: 99%

“…Because of these, a cracked rotor possesses complex dynamic characteristics. Much work on the dynamic behavior of cracked rotors has been performed to identify cracks in rotors, and a number of reviews on this topic [1][2][3][4][5][6][7] have been published. From the literature, vibration-based crack identification methods can be broadly classified as model-based Based on the above short review, there is a trend to transform the crack identification problem into an optimization problem, and through updating iterations to find the crack parameters minimizing the difference between measured features and calculated features, which can be classified as model updating method [36].…”

Section: Introductionmentioning

confidence: 99%

A Super-Harmonic Feature Based Updating Method for Crack Identification in Rotors Using a Kriging Surrogate Model

Ouyang

2019

Applied Sciences

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Dynamic model updating based on finite element method (FEM) has been widely investigated for structural damage identification, especially for static structures. Despite the substantial advances in this method, the key issue still needs to be addressed to boost its efficiency in practical applications. This paper introduces the updating idea into crack identification for rotating rotors, which has been rarely addressed in the literature. To address the problem, a novel Kriging surrogate model-based FEM updating method is proposed for the breathing crack identification of rotors by using the super-harmonic nonlinear characteristics. In this method, the breathing crack induced nonlinear characteristics from two locations of the rotors are harnessed instead of the traditional linear damage features for more sensitive and accurate breathing crack identification. Moreover, a FEM of a two-disc rotor-bearing system with a response-dependent breathing crack is established, which is partly validated by experiments. In addition, the associated breathing crack induced nonlinear characteristics are investigated and used to construct the objective function of Kriging surrogate model. Finally, the feasibility and the effectiveness of the proposed method are verified by numerical experiments with Gaussian white noise contamination. Results demonstrate that the proposed method is effective, accurate, and robust for breathing crack identification in rotors and is promising for practical engineering applications.

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“…So, crack monitoring for rotors is very important, which includes four levels: crack detection, crack localization, crack severity assessment and remaining service life prediction. Many studies have been carried out based on vibration signature in the past few decades, which has been well documented in the review papers . However, most research focus on crack detection, that is, to determine if any cracks exist in a rotor.…”

Section: Introductionmentioning

confidence: 99%

Localization of breathing cracks in stepped rotors using super‐harmonic characteristic deflection shapes based on singular value decomposition in frequency domain

Dong

Ouyang

et al. 2017

Fatigue Fract Eng Mat Struct

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An output‐only multiple‐crack localization method is proposed in this paper to detect and localize breathing cracks in a stepped rotor, which utilizes the crack‐induced local shape distortions in super‐harmonic characteristic deflection shapes (SCDSs). To minimize the noise effects on SCDSs and improve the accuracy of SCDS‐based crack localization, singular value decomposition is adopted to estimate the SCDS as the dominant singular vector of output power spectral density matrix at a super‐harmonic frequency. Then, in order to better reveal shape distortions in the SCDSs, an after‐treatment technique called gapped smoothing method is applied to derive a damage index. Numerical experiments are carried out to investigate the performance of the proposed method based on a two‐disc stepped rotor‐bearing system with breathing cracks established by the finite element method. Results show that the method is effective for single and multiple crack localization in stepped rotors and interference of steps can be excluded. Furthermore, the method is robust to noise. Influences of crack depths and rotating speeds are also investigated, and how to choose the rotating speed for better crack localization is discussed.

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Non-linearities in the vibrations of elastic structures with a closing crack: A state of the art review

Cited by 157 publications

References 117 publications

The Teager-Kaiser Energy Cepstral Coefficients as an Effective Structural Health Monitoring Tool

The Teager-Kaiser Energy Cepstral Coefficients as an Effective Structural Health Monitoring Tool

A Super-Harmonic Feature Based Updating Method for Crack Identification in Rotors Using a Kriging Surrogate Model

Localization of breathing cracks in stepped rotors using super‐harmonic characteristic deflection shapes based on singular value decomposition in frequency domain

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