A damage identification approach for plate structures based on frequency measurements

Yang, Zhibo; Chen, Xuefeng; Yu, Jie; Liu, Rui; Liu, Zhonghua; He, Zhengjia

doi:10.1080/10589759.2013.801472

Cited by 33 publications

(12 citation statements)

References 48 publications

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“…where diag is the diagonal matrix,Φ is the modal shape, is the damping ratio, and is the natural frequency. According to (35), we can obtain Substituting (36) into (34), we can obtain…”

Section: Load Identificationmentioning

confidence: 99%

See 1 more Smart Citation

Hermitian Mindlin Plate Wavelet Finite Element Method for Load Identification

Xue

Chen

Zhang

et al. 2016

Shock and Vibration

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A new Hermitian Mindlin plate wavelet element is proposed. The two-dimensional Hermitian cubic spline interpolation wavelet is substituted into finite element functions to construct frequency response function (FRF). It uses a system’s FRF and response spectrums to calculate load spectrums and then derives loads in the time domain via the inverse fast Fourier transform. By simulating different excitation cases, Hermitian cubic spline wavelets on the interval (HCSWI) finite elements are used to reverse load identification in the Mindlin plate. The singular value decomposition (SVD) method is adopted to solve the ill-posed inverse problem. Compared with ANSYS results, HCSWI Mindlin plate element can accurately identify the applied load. Numerical results show that the algorithm of HCSWI Mindlin plate element is effective. The accuracy of HCSWI can be verified by comparing the FRF of HCSWI and ANSYS elements with the experiment data. The experiment proves that the load identification of HCSWI Mindlin plate is effective and precise by using the FRF and response spectrums to calculate the loads.

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“…where diag is the diagonal matrix,Φ is the modal shape, is the damping ratio, and is the natural frequency. According to (35), we can obtain Substituting (36) into (34), we can obtain…”

Section: Load Identificationmentioning

confidence: 99%

“…One can correct the elastic moduli; those are deduced from the characteristic value of the Mindlin plate [35][36][37][38]. The corresponding elastic modulus value ( = 1, 2, .…”

Section: Experimental Verificationmentioning

confidence: 99%

Hermitian Mindlin Plate Wavelet Finite Element Method for Load Identification

Xue

Chen

Zhang

et al. 2016

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

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“…Some other output-only methods in the frequency domain are developed based on auto/cross-spectral densities, such as the peak picking method, the frequency domain decomposition techniques (FDD) and the enhanced technique [80]. In addition, Yang et al [81] proposed a frequency contour lines method to identify damage in plate-type structure and the Fourier spectrum-based strain energy damage detection method for beam-like structures in noisy conditions [82]. Cao and Ouyang [83] combined the joint approximate diagonalization (JAD) technique and gapped smoothing method (GSM) to form a sensitive and robust damage index in frequency domain.…”

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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“…Usually it is done via a FEM updating procedure driven by changes in natural frequencies and/or mode shapes. On the other hand, model-free damage detection methods are most often based on signal processing techniques and utilize, for example, changes in natural frequencies [3]- [5], modal flexibility [6], modal curvature [7] and modal strain energy [8].…”

Section: Introductionmentioning

confidence: 99%

Damage Detection in Structures – Examples

Duvnjak

Damjanović

Sabourova

et al. 2019

IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management

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Damage assessment of structures includes estimation of location and severity of damage. Quite often it is done by using changes of dynamic properties, such as natural frequencies, mode shapes and damping ratios, determined on undamaged and damaged structures. The basic principle is to use dynamic properties of a structure as indicators of any change of its stiffness and/or mass. In this paper, two new methods for damage detection are presented and compared. The first method is based on comparison of normalised modal shape vectors determined before and after damage. The second method uses so-called 1-norm regularized finite element model updating. Some important properties of these methods are demonstrated using simulations on a Kirchhoff plate. The pros and cons of the two methods are discussed. Unique aspects of the methods are highlighted.

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A damage identification approach for plate structures based on frequency measurements

Cited by 33 publications

References 48 publications

Hermitian Mindlin Plate Wavelet Finite Element Method for Load Identification

Hermitian Mindlin Plate Wavelet Finite Element Method for Load Identification

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

Damage Detection in Structures – Examples

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