Experimental Study of Impactor Motion in a Sandy Medium by a Contactless Method

Герасимов, С. И.; Zubankov, A. V.; Ерофеев, В. И.; Kikeev, V. A.; Trepalov, N. A.; Kalmykov, A. P.; Kapinos, S. A.; Sirotkina, A. G.

doi:10.1134/s002189442101017x

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…In form, it is a kind of exercise combining Chinese traditional martial arts with Western modern sports. In content, it has national and traditional culture, and in form, it is modern and common between China and the West [ 2 ]. With the continuous communication between Chinese and Western cultures, the continuous updating of training methods and methods, the continuous improvement of athletes' physical strength and skills, and the continuous improvement of wushu competition rules, wushu routine has formed a rich content, diverse forms, and a wide range of popular traditional sports in China.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Alleviating Sports Injury through Data Screening of Functional Motor Biological Images

Rao

2021

Journal of Healthcare Engineering

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In order to better reduce sports injury, a method based on functional motion biological image data is proposed. Through performing functional motion screening test on wushu athletes, including 7 items of test, each athlete is given a score according to the test standard. This paper summarizes the mistakes and deficiencies of common movement patterns of athletes and makes different intervention plans to improve the effect of sports injury screening. The results show that, at P > 0.001 , there was a significant difference, and the experimental group FMS total score (15.02 ± 3.7) was lower than the control group FMS total score (18.51 ± 1.45). The recognition rate of the system is higher than that of the system based on single feature, and the recognition performance is better than that of the standard SVM and KNN recognition methods. It is proved that the design of the system is feasible, reliable, and effective.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Alleviating Sports Injury through Data Screening of Functional Motor Biological Images

Rao

2021

Journal of Healthcare Engineering

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“…Initially, the digital image correlation method was used primarily for the analysis of velocity fields in the digital tracer anemometry (Particle Iimage Velocimetry -PIV) method [1]. Further, this image processing method was used to analyze images of high-speed gas-plasma and liquid flows [2], to visualize the flow structure in a water drop [3], to visualize perturbations of the sandy medium [4,5], as well as to visualize displacements and deformations [6,7].…”

Section: Introductionmentioning

confidence: 99%

Registration of Displacement and Visualization of the Deformation Field of a Cylindrical Shell under its Shock-Wave Loading

Герасимов¹,

Totyshev²,

Trepalov³

et al. 2021

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This paper discusses and demonstrates the approach to the registration of the elastic deformations and vibrations of the barrel of a light-gas gun based on high-speed video recording and the subsequent processing of the obtained images by a cross-correlation algorithm. The use of high-speed video recording of the cylindrical shell surface and crosscorrelation analysis of the obtained images allows determining the space-time dependencies of the movement of the recorded surface and visualizing the deformation field. The approach is demonstrated by the example of high-speed video recording of a fragment of the barrel of a light-gas gun LGG-5,6 in the process of firing. Vibrations of the barrel in the vertical and horizontal directions were recorded, the maximum amplitude value of which was 5 mm. We also visualize for analysis the field of longitudinal elastic deformations of the barrel caused by the passage of the striker through the barrel channel.

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“…Определение закономерностей процессов проникания твердых тел в грунтовые среды актуально, но затруднено по ряду объективных причин [1][2][3][4][5][6][7][8][9][10]. Для расчета большое значение имеют экспериментальные зависимости, которые используются для тестирования или верификации применяемых подходов и моделей для описания процессов проникания [11][12][13][14][15][16][17][18][19][20].…”

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Mechanical Wear of the Penetrator Body During Its Movement in the Ground

Borisov

Gerasimov²,

Ryzhov

et al. 2023

PSP

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One of the most important parameters when choosing the design of the reactor is the contours of the cavitator – its head part and the nature of the material entrainment. During the tests of penetrating elements when embedded in soil barriers, the effect of abrasive wear of the material on the cavitating surface caused by the scratching effect of soil particles was detected. Moreover, the scale of abrasive wear strongly depends on the shape of the head part, for example, a penetrating element with a cavitator with a flat end shows slight wear of the side edges, and a conical cavitator noticeably changes its geometric shape. To estimate the wear of penetrating elements with a conical cavitator, it is proposed to use the J. Archard abrasive wear model. The main difficulty in applying this model leads to the experimental determination of the value of the coefficient characterizing the dependence of the wear rate on the speed. Inside the penetrators, onboard measuring complexes were located that recorded the dependence of acceleration on time on the terradynamic section of the trajectory. After the experiments, the penetrators were removed from the shaft and their residual length was measured. To assess the effect of wear on the terradynamic characteristics of the penetrators, a series of calculations of the parameters of the process of their penetration into the soil barrier for a flat, ogive and conical shape of the tip was carried out. According to the results obtained, taking into account the wear process of the cavitating tip leads to a decrease in the depth and to a more intensive penetration of the penetrator, which is the result of a decrease in the mass of the penetrator during the insertion process and an increase in the diameter of the cavitating cone. As expected, the penetration parameters change most noticeably at a high initial penetration rate.

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Experimental Study of Impactor Motion in a Sandy Medium by a Contactless Method

Cited by 3 publications

References 3 publications

Experimental Study on Alleviating Sports Injury through Data Screening of Functional Motor Biological Images

Experimental Study on Alleviating Sports Injury through Data Screening of Functional Motor Biological Images

Registration of Displacement and Visualization of the Deformation Field of a Cylindrical Shell under its Shock-Wave Loading

Mechanical Wear of the Penetrator Body During Its Movement in the Ground

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