A Method for Determining the Locations of Impacts in a Composite Material Using Fiber Optical Acoustic Emission Sensors

Bochkova, Sofya D.; Volkovsky, S. A.; Efimov, Mikhail E.; Deineka, I. G.; Smirnov, Daniil; Litvinov, E.V.

doi:10.1134/s0020441220040235

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…[6]. Современные исследования в этой области посвящены способам определения места ударного воз-действия в пластинах из композитов [7][8][9][10][11][12], пластинах с вырезами [13][14][15], различных балках [16], элементах аэрокосмических конструкций [17][18][19][20], а также в деталях строительных конструкций из железобетона, таких как корпус реактора [21], фермы [22], колонны [23; 24], плиты [25; 26].…”

Section: Introductionunclassified

Identification of the Impact Position in a Reinforced Concrete Structure Based on the Analysis of the Response of Vibration Sensors

Tsvetkov¹,

Шардаков²,

Glot³

et al. 2022

PNRPU Mechanics Bulletin

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The article presents the results of an experiment to study the vibration response of a large-scale reinforced concrete model structure to an impulse load. The load was a series of impacts along the normal to the surface of the element and was applied to all the main structural ele-ments (columns, crossbars and floor slabs). The vibration response was recorded by a system of sensors-accelerometers distributed over the structural elements and synchronized with the accelerometer mounted on the striker. The results of measurements of acceleration vibrograms were saved as digital files. An array of vibrograms recorded by the entire complex of sensors in response to test impacts on the main structural elements made up a vibration portrait of the structure. As a result of processing this information, an array of data was obtained on the propa-gation time of the vibration signal from each signal source to each of the sensors of the registra-tion system (basic array of responses).Key words: Impact localization, accelerometer, The data obtained were used to solve the problem of determining the location of an arbi-trary impact on a structure. To do this, the vibration response recorded by the sensor system during an arbitrary impact was compared with the base array of responses. The comparison was made on the basis of the calculation of the pair correlation coefficients. The resulting spatial distribution of the correlation coefficients made it possible to identify the position of the shock load application. It corresponds to the structural element that has the maximum value of the correlation coefficient. The proposed algorithm was demonstrated on an example where one of the test shocks that participated in the FORMATION of the basic vibration portrait was used as an unknown load. In a numerical experiment using the proposed algorithm, it was found that the accuracy of the impact site identification corresponds to the characteristic step of the structural elements. It is shown that the accuracy correlates with the number of sensors of the registration system and their distribution throughout the structure. The developed algorithm for identifying the place of impact load application can be effec-tively used in the development of automated systems for deformation monitoring.

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Section: Introductionunclassified

Identification of the Impact Position in a Reinforced Concrete Structure Based on the Analysis of the Response of Vibration Sensors

Tsvetkov¹,

Шардаков²,

Glot³

et al. 2022

PNRPU Mechanics Bulletin

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“…Spatial selection requires localization of acoustic emission sources with an acceptable error, which in the case of composite materials has proven to be a rather complex problem [14][15][16][17]. Parametric selection is effective when the maximum amplitude of the acoustic emission pulses is, on average, at least 5 dB higher than the amplitude of the noise component.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Extracting Damage Induced AE Signals from Different Type Noise-Like Backgrounds for Carbon-Fibre Reinforced Polymers

2021

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This paper presents an algorithm for isolating a useful acoustic signal (corresponding to damage accumulation) against the background of a signal used to model the performance of an industrial rotary equipment. Acoustic emission signals induced by deformation and fracture were studied using a uniaxial tensile test on woven laminate samples cut along the fiber and weft directions. The background signal is a random composition of acoustic pulses used to model the performance of an industrial rotary equipment. A comparison of useful and noise signals enables us to develop two algorithms based on frequency filtering of a signal and its decomposition into empirical modes. These algorithms can be used to isolate useful AE pulses against the background of all signal intensities under consideration.

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Research on high precision optical fiber acoustic emission system for weak damage location on concrete

Miao

Gao

Tong

et al. 2022

Construction and Building Materials

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A Method for Determining the Locations of Impacts in a Composite Material Using Fiber Optical Acoustic Emission Sensors

Cited by 10 publications

References 6 publications

Identification of the Impact Position in a Reinforced Concrete Structure Based on the Analysis of the Response of Vibration Sensors

Identification of the Impact Position in a Reinforced Concrete Structure Based on the Analysis of the Response of Vibration Sensors

Strategies for Extracting Damage Induced AE Signals from Different Type Noise-Like Backgrounds for Carbon-Fibre Reinforced Polymers

Research on high precision optical fiber acoustic emission system for weak damage location on concrete

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