Impact energy identification on a composite plate using basis vectors

Wu, Zhen; Xu, Lin; Wang, Yishou; Cai, Yongchao

doi:10.1088/0964-1726/24/9/095007

Cited by 12 publications

(12 citation statements)

References 28 publications

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“…An impact event with higher energy results in more significant responses. In this way, Wu et al 12 developed a linear relationship between the impact energy and response signals to assess the impact energy:…”

Section: Impact Force Reconstructionmentioning

confidence: 99%

“…[8][9][10][11] This work mainly involves two steps: impact localization and impact force reconstruction. 12 Moreover, the study published by Wu et al also estimated the impact energy to assess the remaining life of the structure system. 12 In the case of impact localization, the time of fight (ToF) or time of arrival (ToA) of transducers are effective indicators for locating the impact position.…”

Section: Introductionmentioning

confidence: 99%

“…12 Moreover, the study published by Wu et al also estimated the impact energy to assess the remaining life of the structure system. 12 In the case of impact localization, the time of fight (ToF) or time of arrival (ToA) of transducers are effective indicators for locating the impact position. 13 This strategy utilizes the velocity of waves induced by the impact and coordinates of sensors to detect the impact source geometrically.…”

Section: Introductionmentioning

confidence: 99%

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Impact localization and force reconstruction for composite plates based on virtual time reversal processing with time-domain spectral finite element method

Zheng

Sun

et al. 2023

Structural Health Monitoring

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Composite structures are widely used in different industries as important load-carrying components due to their excellent performance. These structures are prone to be damaged under low-velocity impacts with invisible cracks. Hence, impact identification is a critical part of composite structural health monitoring. In this paper, an approach is developed, which is based on time-reversal (T-R) processing and time-domain spectral finite element method. The spatial and temporal focusing properties of T-R are utilized to locate the impact source and restore the impact force, respectively. Moreover, the impact energy is evaluated by establishing the function of impact force and kinetic energy at the impact moment. The proposed method is validated experimentally for different scenarios. The influences of the signal length and accuracy of the numerical model on the proposed method are discussed in detail. The results demonstrate that the proposed method can correctly locate the impact source in composite structures, and the identified impact force can reproduce the impact event efficiently. The impact localization is essentially independent of the effect of signal length while it is vulnerable to the mesh grid. Besides, the developed method has consistent results in the case of data perturbation of material properties in the numerical model, which shows its good robustness.

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Section: Impact Force Reconstructionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact localization and force reconstruction for composite plates based on virtual time reversal processing with time-domain spectral finite element method

Zheng

Sun

et al. 2023

Structural Health Monitoring

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show abstract

“…e second approach is data-driven, in which a known set of features of the impact signal are generally mapped to the impact locations using a training algorithm. Such methods include database matching [22,23] and machinelearning-based methods [24,25]. e database matching method requires impact testing at different locations on the structure surface in advance to build a characteristics database of elastic waves generated at different impact points.…”

Section: Introductionmentioning

confidence: 99%

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Peng

Cui

Huang

et al. 2022

Shock and Vibration

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Flat plates and cylindrical shells are commonly used in large equipment. To locate the low-velocity impact points in these structures, this study proposes an error-index-based algorithm for impact localization. The time of arrival of an impact-generated A0 Lamb waves was first estimated based on the energy of the signal. Equations for calculating the error indices were proposed for flat-plate and cylindrical shell structures, and the probability distribution functions of the impact points are constructed for visual localization. The impact test results on a flat plate and cylindrical shell indicated that, compared to the Morlet wavelet method, the proposed algorithm improved the mean relative error of impact point localization on the flat plate by 0.22%, 15.64%, and 15.26% under three different noise conditions, respectively (i.e., no noise, and SNR = 5 and 0 dB). For the cylindrical shell, the mean relative error of impact localization improved by 1.8%, 3.97%, and 28.12% under the three conditions, respectively. The results indicated that the proposed localization algorithm can accurately locate the impact points on a flat plate and cylindrical shell, even under strong background noise conditions, providing a reference for future research on locating low-velocity impact points in large equipment.

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“…Yuan (20) proposed a near-field multiple signal classification-based impact localisation method, noting that the velocity of the signal should be used in the method. Wu (21) used basis vectors to identify the impact location and impact energy on composite plate. The basis-vector-based method is widely used in other areas of research, such as the matching pursuit method (22) , building the fuzzy model (23) , the least squares support vector machine (24) , the location determination in the communications (25) and so on.…”

Section: Introductionmentioning

confidence: 99%

Determination of impact events on a plate-like composite structure

Wang

Cai

et al. 2016

Aeronaut. j.

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Composite materials have been increasingly used in aircraft structures. However, these composite structures are susceptible to damage from external low-velocity impacts. In this paper, an impact identification algorithm is proposed to estimate the impact location and force time history simultaneously. A localisation method based on basis vectors is proposed, and the impact force time history is reconstructed by simplified transfer functions. The basis vector stands for the relationship between the impact location and the sensor signals, and the transfer function shows the relationship of the sensor signal and the force time history. An experiment is conducted on a flat glass fibre-epoxy matrix composite plate to verify the developed algorithm using only four sensors. The soft impactor and hard impactor are two typical impactors for impact events; therefore, the impact experiment is performed by the rubber and the steel impactors, respectively. The experimental results indicate that the proposed algorithm is feasible for the identification of impact events on plate-like composite structures.

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Impact energy identification on a composite plate using basis vectors

Cited by 12 publications

References 28 publications

Impact localization and force reconstruction for composite plates based on virtual time reversal processing with time-domain spectral finite element method

Impact localization and force reconstruction for composite plates based on virtual time reversal processing with time-domain spectral finite element method

Error-Index-Based Algorithm for Low-Velocity Impact Localization

Determination of impact events on a plate-like composite structure

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