A Dynamic Equilibrium–Based Damage Identification Method Free of Structural Baseline Parameters: Experimental Validation in a Two-Dimensional Plane Structure

Xu, Hao; Zhou, Qi; Cao, Maosen; Su, Zhongqing; Wu, Zhen

doi:10.1061/(asce)as.1943-5525.0000895

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…1. Because the LPF reflects the damage-caused perturbation in equilibrium of a structural element, structural damage identification approaches using LPFs have been widely reported [38][39][40][41][42][43][44][45][46][47][48][49]: Eq. ( 4)…”

Section: Linear Pseudo-forcementioning

confidence: 99%

Nonlinear pseudo-force in a breathing crack to generate harmonics

Radzieński

et al. 2021

Journal of Sound and Vibration

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Section: Linear Pseudo-forcementioning

confidence: 99%

Nonlinear pseudo-force in a breathing crack to generate harmonics

Radzieński

et al. 2021

Journal of Sound and Vibration

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“…From Equations (16) and (17), it can be seen that the transverse vibration of a damaged beam component is equivalent to its corresponding pristine counterpart subjected to a pseudo-excitation force [ 25 , 30 ]. Consequently, the damage-induced local pseudo-excitation force can be harnessed for damage detection, localization and quantification.…”

Section: Damage Localization Based On the Improved Pe Methodsmentioning

confidence: 99%

“…Firstly, some material or structural properties in the equation of local motion, such as stiffness and cross-sectional area, may be inaccurately described or even unknown a priori [ 29 ]. Secondly, a local dynamic equilibrium with the assumption of no damping effects is typically adopted, which is limited to non-resonant frequencies [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Robust Baseline-Free Damage Localization by Using Locally Perturbed Dynamic Equilibrium and Data Fusion Technique

Cao

Ouyang

2020

Sensors

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Mode shape-based structural damage identification methods have been widely investigated due to their good performances in damage localization. Nevertheless, the evaluation of mode shapes is severely affected by the measurement noise. Moreover, the conventional mode shape-based damage localization methods are normally proposed based on a certain mode and not effective for multi-damage localization. To tackle these problems, a novel damage localization approach is proposed based on locally perturbed dynamic equilibrium and data fusion approach. The main contributions cover three aspects. Firstly, a joint singular value decomposition technique is proposed to simultaneously decompose several power spectral density transmissibility matrices for robust mode shape estimation, which statistically deals better with the measurement noise than the traditional transmissibility-based methods. Secondly, with the identified mode shapes, an improved pseudo-excitation method is proposed to construct a baseline-free damage localization index by quantifying the locally damage perturbed dynamic equilibrium without the knowledge of material/structural properties. Thirdly, to circumvent the conflicting damage information in different modes and integrate it for robust damage localization, a data fusion scheme is developed, which performs better than the Bayesian fusion approach. Both numerical and experimental studies of cantilever beams with two cracks were conducted to validate the feasibility and effectiveness of the proposed damage localization method. It was found that the proposed method outperforms the traditional transmissibility-based methods in terms of localization accuracy and robustness.

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“…The concept of extracting damage-induced perturbations from the dynamic equations and irregularities from the mode shapes using WT, or other filtering methods [67], garnered interest from other researchers. The dynamic equilibrium-based technique was later expanded for application in plate-like structures [102,103]. In a similar wavelet-aided research, Bai et al [23] conducted numerical and experimental examinations to identify delamination in composite plates under noisy conditions, showcasing improvements in the accuracy of damage detection in both beam-like and plate-like structures due to the use of WT in the response analysis.…”

Section: Review Of Space Domain-based Techniques Using Wavelet Transf...mentioning

confidence: 99%

Reference-Free Vibration-Based Damage Identification Techniques for Bridge Structural Health Monitoring—A Critical Review and Perspective

Moravvej,

El-Badry

2024

Sensors

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Bridges are designed and built to be safe against failure and perform satisfactorily over their service life. Bridge structural health monitoring (BSHM) systems are therefore essential to ensure the safety and serviceability of such critical transportation infrastructure. Identification of structural damage at the earliest time possible is a major goal of BSHM processes. Among many developed damage identification techniques (DITs), vibration-based techniques have shown great potential to be implemented in BSHM systems. In a vibration-based DIT, the response of a bridge is measured and analyzed in either time or space domain for the purpose of detecting damage-induced changes in the extracted dynamic properties of the bridge. This approach usually requires a comparison between two structural states of the bridge—the current state and a reference (intact/undamaged) state. In most in-situ cases, however, data on the bridge structural response in the reference state are not available. Therefore, researchers have been recently working on the development of DITs that eliminate the need for a prior knowledge of the reference state. This paper thoroughly explains why and how the reference state can be excluded from the damage identification process. It then reviews the state-of-the-art reference-free vibration-based DITs and summarizes their merits and shortcomings to give guidance on their applicability to BSHM systems. Finally, some recommendations are given for further research.

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A Dynamic Equilibrium–Based Damage Identification Method Free of Structural Baseline Parameters: Experimental Validation in a Two-Dimensional Plane Structure

Cited by 8 publications

References 25 publications

Nonlinear pseudo-force in a breathing crack to generate harmonics

Nonlinear pseudo-force in a breathing crack to generate harmonics

Robust Baseline-Free Damage Localization by Using Locally Perturbed Dynamic Equilibrium and Data Fusion Technique

Reference-Free Vibration-Based Damage Identification Techniques for Bridge Structural Health Monitoring—A Critical Review and Perspective

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