Frequency response function shape-based methods for structural damage localisation

Liu, X.; Lieven, Nicholas A J; Escamilla-Ambrosio, Ponciano Jorge

doi:10.1016/j.ymssp.2008.10.002

Cited by 105 publications

(56 citation statements)

References 10 publications

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“…This means that the IFS index at each natural frequency is closely related to its modal flexibility form. Therefore the damage location can be described by IFS index, which in turn supports the validity of the method in [6]. Inspired by ULS and IFS index, here a novel index is proposed as { } (10) in which ωq and ωs limited the frequency range, consisting of m natural frequencies.…”

Section: Construction Of Damage Localization Indexmentioning

confidence: 56%

“…Some researchers extended mode shape-based index to broadband frequency ranges using FRF shape information. Liu et al [6] …”

Section: Construction Of Damage Localization Indexmentioning

confidence: 99%

“…Another advantage is that FRF provides a wide range of frequencies and gives more information related to structural dynamical characteristics. Liu et al [6] proposed a non-modal scheme including some significant modifications such as using the imaginary parts of FRF shapes (IFS) and normalized FRF shapes (NFS) before comparison to detect the fault in a single damaged beam. The damage can be easily found by using IFS index.…”

Section: Introductionmentioning

confidence: 99%

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Multi-damage localization in plate structure using frequency response function-based indices

Gao

Guo

Ouyang

et al. 2015

J. Phys.: Conf. Ser.

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Abstract. Vibration signal and its derivative have shown some promise in structural damage detection in previous research. However, the theoretical and practical difficulties of multi-damage detection in plate structures based on dynamic responses remain. In this paper, an efficient damage localization index based on frequency response function (FRF) is presented.The imaginary part of FRF (IFRF) is extracted to derive the new localization index due to its relation to modal flexibility. For avoiding the finite element model error, two-dimensional gapped smoothing method (GSM) is employed without the need for baseline data from a presumably undamaged structure. Experimental studies on a steel plate with two localized defects in different boundary conditions are performed. The results are compared with some typical damage indices in the literature, such as mode shapes, uniform load surface and IFRF.In order to mitigate the inherent disadvantages of GSM in anti-noise ability, a simple statistical treatment based on Thompson outlier analysis is finally used for noise suppression. The effect of damage level and boundary condition on the detection results is also investigated.

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Section: Construction Of Damage Localization Indexmentioning

confidence: 56%

“…Some researchers extended mode shape-based index to broadband frequency ranges using FRF shape information. Liu et al [6] …”

Section: Construction Of Damage Localization Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-damage localization in plate structure using frequency response function-based indices

Gao

Guo

Ouyang

et al. 2015

J. Phys.: Conf. Ser.

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“…Meanwhile, the direct use of FRF shapes has been studied by many researchers. For example, Liu et al [65] made use of the residual imaginary parts of FRF shapes to locate the structural damage and the abnormality caused by damage in a cantilever beam. Salehi et al [66] presented a damage detection technique based on both the real and imaginary parts of measured FRF shape.…”

Section: Frequency Domain Methodsmentioning

confidence: 99%

The State-of-the-Art on Framework of Vibration-Based Structural Damage Identification for Decision Making

2017

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Abstract:Research on detecting structural damage at the earliest possible stage has been an interesting topic for decades. Among them, the vibration-based damage detection method as a global technique is especially pervasive. The present study reviewed the state-of-the-art on the framework of vibration-based damage identification in different levels including the prediction of the remaining useful life of structures and the decision making for proper actions. This framework consists of several major parts including the detection of damage occurrence using response-based methods, building reasonable structural models, selecting damage parameters and constructing objective functions with sensitivity analysis, adopting optimization techniques to solve the problem, predicting the remaining useful life of structures, and making decisions for the next actions. For each part, the commonly used methods were reviewed and the merits and drawbacks were summarized to give recommendations. This framework is aimed to guide the researchers and engineers to implement step by step the structure damage identification using vibration measurements. Finally, the future research work in this field is recommended.

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“…Not considering just the FRFs in the low-frequency range, Friswell [10] gives an overview of the usage of inverse methods in damage detection and location, by measured vibration data. Liu et al [11] used the imaginary part of FRF shapes and normalized FRF shapes for damage localization. Their method was illustrated by a numerical example of a cantilever beam.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Some Methods for Structural Damage Detection

2017

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In principal, a proper analysis of the dynamic response of a structure can provide general indicators of its operational conditions. When the dynamic response changes due to a variation of the physical properties of a structure, then one may conclude that some kind of damages has occurred. This paper presents investigation of the robustness and comparison of four simple methodologies to both identify and quantify the damages in structures, based on the use of Frequency Response Functions (FRF) signals, Principal Component Analysis technique (PCA) and Transmissibility. A steel beam with constant rectangular crosssection is used to compare the proposed approaches. At first, nine damaged scenarios are created and for each of them numerical examples are discussed; a database of FRFs is measured using modal testing. Then, PCA theory is applied to the FRF matrix and global damage detection and quantification indices are defined by using the first 3 Principal Components; Hotelling's T-squared distribution is also applied and by using transmissibility two other indicators, Transmissibility Damage Indicator and Weighted Damage Indicator, are computed for the assessment of damage. The reported examples show that all proposed methods are able to detect and quantify damages at the initial stage.

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Frequency response function shape-based methods for structural damage localisation

Cited by 105 publications

References 10 publications

Multi-damage localization in plate structure using frequency response function-based indices

Multi-damage localization in plate structure using frequency response function-based indices

The State-of-the-Art on Framework of Vibration-Based Structural Damage Identification for Decision Making

A Comparison of Some Methods for Structural Damage Detection

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