Reconstruction and Analysis of Impact Forces on a Steel-Beam-Reinforced Concrete Deck

Kalhori, Hamed; Ye, Lin; Mustapha, Samir; Li, J.; Li, B.

doi:10.1007/s11340-016-0188-4

Cited by 23 publications

(22 citation statements)

References 29 publications

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“…Regarding the reconstruction problem, the unknowns are the parameters of the selected load history model. Instead of identifying the load history at each sample time [3,4,6,7,27], the proposed approach consists in capturing specific impact parameters. However, the selected load history model should correctly represent the applied load history.…”

Section: Computational Efficiencymentioning

confidence: 99%

“…Mainly three regularization approaches have been developed, in time or frequency domain, to get a robust and accurate estimate of the solution. Firstly, the Truncated Singular Values Decomposition (TSVD) consists in removing the small singular values of the transfer matrix [3,4]. Leclère et al [3] used the TSVD to reconstruct dynamic loads acting in an operating diesel engine.…”

Section: Introductionmentioning

confidence: 99%

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Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes

Goutaudier

Gendre

Kehr-Candille³

et al. 2020

Mechanical Systems and Signal Processing

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This study presents a novel strategy for identifying an impact event on a structure from vibration measurements. Compared to triangulation techniques that require at least three sensors on a plate-like structure, only one sensor is used in this work for localizing the impact point. The proposed approach consists in extracting specific modal ponderations as a signature of impact location. The force reconstruction problem is simultaneously addressed by fitting a parametric law. The proposed procedure captures the main load history parameters such as the impact time, its duration and its intensity. An impact test campaign is performed on a metallic plate, equipped with one accelerometer only, to confirm the validity of the proposed single-sensor approach. The methodology is efficient for accurately localizing impacts that are applied anywhere on the plate and for quickly estimating the main load history parameters.

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Section: Computational Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes

Goutaudier

Gendre

Kehr-Candille³

et al. 2020

Mechanical Systems and Signal Processing

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show abstract

“…To generate the transfer function between each potential impact location (8 locations) and a PZT sensor, a set of known impact forces were first applied at each impact location and the resultant dynamic strains were collected by a single piezoceramic sensor. A complete procedure for establishing the transfer function can be found in previous studies [29,[35][36][37]. An impact force with unknown amplitude and location was then applied at one of the potential locations.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

Automated algorithm for impact force identification using cosine similarity searching

Kalhori

Alamdari

2018

Measurement

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A similarity searching technique is adopted to identify the impact force applied on a rectangular carbon fibre-epoxy honeycomb composite panel. The purpose of this study is to simultaneously identify both the location and magnitude of an unknown impact using the measured dynamic response collected by only a single piezoelectric sensor. The algorithm assumes that a set of impact forces are concurrently applied on a set of pre-defined locations. However, the magnitude of all the impact forces except one is considered to be zero. The impact force at all potential locations is then reconstructed through an l2-norm-based regularisation via two strategies: even-determined approach and under-determined approach. In an evendetermined approach, the reconstruction process is performed independently for each pair of sensor and potential impact location. However, in an under-determined approach, the captured vibration signal is the superposition of the responses of the simultaneous 'assumed' impacts at the potential locations. Using either approach, a reconstructed impact force is obtained for each potential impact location. The reconstructed impact forces at spurious locations are expected to have zero magnitude as no impact has actually occurred at these locations. However, there might

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“…Tikhonov regularization [8] is also commonly employed to regularize the reconstruction problem. Khalori et al [9] used the L-curve method [10] to determine the optimal Tikhonov regularization parameter. They experimentally validated this technique to reconstruct impact loads applied on a steel-beam-reinforced concrete deck.…”

Section: Introductionmentioning

confidence: 99%

Impulse identification technique by estimating specific modal ponderations from vibration measurements

Goutaudier

Gendre

Kehr-Candille³

et al. 2020

Journal of Sound and Vibration

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Impact identification is a major concern in structural health monitoring. It consists in localizing the impact point and in reconstructing the applied load history from indirect measurements. However, it is well-known that this double inverse problem is ill-posed. In this paper, a single-sensor approach for quickly localizing a Dirac-like impact and for estimating its intensity from vibration measurements is proposed. It is proved that the relative proportions of specific modal ponderations are a signature of impact location. Rules are provided to select the appropriate vibration modes in the analysis and to position the sensor. The identification process is robust if the vibration modes kept in the analysis are weakly damped and if their natural frequencies are well separated. Experiments are conducted on a metallic plate to validate this singlesensor approach on a 2D structure. The success rate for localizing impacted cells is 100% when appropriate method parameters are selected.

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Reconstruction and Analysis of Impact Forces on a Steel-Beam-Reinforced Concrete Deck

Cited by 23 publications

References 29 publications

Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes

Single-sensor approach for impact localization and force reconstruction by using discriminating vibration modes

Automated algorithm for impact force identification using cosine similarity searching

Impulse identification technique by estimating specific modal ponderations from vibration measurements

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