A robust damage detection method based on multi-modal analysis in variable temperature conditions

Gillich, Gilbert-Rainer; Furdui, Horia; Wahab, Magd Abdel; Korka, Zoltan-Iosif

doi:10.1016/j.ymssp.2018.05.037

Cited by 90 publications

(52 citation statements)

References 21 publications

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“…Cantilever aluminium plates of dimension 0.35×0.23×0.003 m 3 with Young's modulus E=69 GPa, Poisson's ratio ν=0.35 and mass density ρ=2700 kg m −3 are studied. Based on the Mindlin plate theory, the plates are modelled in MATLAB by using the four-node quadrilateral shell elements.…”

Section: Numerical Studiesmentioning

confidence: 99%

“…The plates are clamped on the left and discretized into 140×92 equal-sized elements of 0.0025×0.0025×0.003 m 3 . Two damage scenarios are studied and the damage is introduced by reducing the thickness of the associated FE elements, as shown in The purposes of numerical studies are twofold.…”

Section: Numerical Studiesmentioning

confidence: 99%

“…Vibration-based damage identification plays an important role in structural health monitoring and has experienced a rapid development in the past several decades [1][2][3][4]. The basic principle of vibration-based techniques consists in examining damage-induced changes in the vibration signatures under various operational and environmental conditions [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive damage localization based on locally perturbed dynamic equilibrium and hierarchical clustering

Cao

Ouyang

Cheng

2019

Smart Mater. Struct.

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Pseudo-excitation (PE) method is a recently developed damage identification method for flexible structures containing components like beams, plates and shells. Characterized by the high-order spatial derivatives, the approach has been shown to feature a high sensitivity to local damage. However, two major issues, i.e. susceptibility to measurement noise and unknown material/ structural properties, hamper its practical applications. To tackle these problems, an adaptive damage localization method is proposed for plate-type structures, which combines the PE method with hierarchical clustering. In the proposed method, a general dynamic equilibrium model, involving unknown material/structural properties, is statistically identified and further used for damage localization. Moreover, noise-induced effects are quantified by using a hierarchical clustering for performance assessment of damage localization and process optimization of spatial derivative estimation to achieve more accurate damage localization. Meanwhile, a data fusion scheme is developed to avoid blind inspection zones, thus enhancing the capability of damage localization. Both numerical and experimental studies of cantilever plates containing two damage zones are conducted to validate the feasibility and the effectiveness of the proposed adaptive damage localization method. Results demonstrate that the proposed method outperforms the traditional PE method in terms of detection accuracy and robustness.

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Section: Numerical Studiesmentioning

confidence: 99%

Section: Numerical Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptive damage localization based on locally perturbed dynamic equilibrium and hierarchical clustering

Cao

Ouyang

Cheng

2019

Smart Mater. Struct.

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“…Damage detection techniques that use these modal parameters are available [1][2][3][4][5]. There are also techniques that consider the axial forces manifested in the beam that appear due to environmental conditions [6] or operational loads [7][8][9]. All the methods that use the vibrations are based on the deterministic link between the changes of the beam geometry and its modal parameters.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for frequency-based prediction of cracks in open cross-section beams

Barbinta¹,

Tufiși²,

Hamat³

et al. 2019

Vib. proced.

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The paper presents a study dedicated to analyzing the sensitivity of structures with open contours to cracks. For this purpose, we analyze the particular case of the I-beam made by welding, for which we want to see how the frequencies of different modes of vibration change when a crack occurs in the weld joint between the web and the flange. The research is done using numerical simulations performed with the ANSYS program, from which the natural frequencies are obtained depending on the depth and extent of the crack. A large number of vibration modes and two types of boundary conditions are taken into account. We found that the frequency changes are small but still detectable and depend on the beam fixation mode. This makes it possible to detect cracks in the weld joint if the vibration modes where the decrease in frequency is significant are analyzed.

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“…The stiffness loss reduces the capacity of a structure to store energy, and it directly depends on the position [1][2][3][4], respectively on the shape and depth of the crack [5][6][7][8]. The theory was also developed for changing environment [9][10][11], variable beam cross-section [12] and multiple cracks [13,14].…”

Section: Introductionmentioning

confidence: 99%

Numerical study on complex shaped cracks in cantilever beams concerning frequency and stiffness changes

Tufiși¹,

Gillich²,

Nedelcu³

et al. 2018

Vib. proced.

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The paper presents a mathematical relation to express the effects of a T-shaped crack on beam-like structures. The study is performed by using the finite element method (FEM) and contrived analytical formulas for proving the existing correlation between deflection, strain energy, and natural frequency changes. The damaged beam static and dynamic behaviors are analyzed by means of the FEM. The frequency shift for the first mode of vibration derived directly was compared with the frequency alteration calculated involving the change in the beam deflection for several scenarios of the T-shaped crack. The frequency shift is derived using the relations between deflection and natural frequency. As the final step in the research, we compared the outcomes for the same crack with the results achieved from a beam suffering a loss of stiffness.

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A robust damage detection method based on multi-modal analysis in variable temperature conditions

Cited by 90 publications

References 21 publications

Adaptive damage localization based on locally perturbed dynamic equilibrium and hierarchical clustering

Adaptive damage localization based on locally perturbed dynamic equilibrium and hierarchical clustering

Sensitivity analysis for frequency-based prediction of cracks in open cross-section beams

Numerical study on complex shaped cracks in cantilever beams concerning frequency and stiffness changes

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