Abstract
This study investigated the shoulder force and recoil displacement of machine guns and analyzed the influence of mounting and ground conditions. Distributed thin-film sensors were used to simultaneously measure the surface pressure at the shoulder area of the gun butt and the recoil displacement of the firearms. High-speed photography was used for the measurements. The shoulder force curve and the recoil displacement curve of the machine gun under different boundary conditions were obtained. The characteristics of the shoulder force and recoil displacement were analyzed by considering the “sliding” effect of recoil. Then, the influences of mounting and ground conditions were compared. An equivalent model for establishing the relationship between the shoulder force and the recoil displacement was constructed. The obtained results were compared with the experimental data. The experimental results indicate that the proposed method can simultaneously measure the shoulder force and recoil displacement. The shoulder force and recoil displacement are greater in the bipod condition than in the tripod condition; they are also greater in the cemented floor condition than in the sandbag-on-the-floor condition. The calculation results of the shoulder force–recoil displacement equivalent model agree well with the experimental results.
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References
Editorial Committee of the Ordnance Industry Science and Technology Dictionary, Dictionary of Science and Technology in the Ordnance Industry, National Defense Industry Press, China (1992) 174–189.
Y. Yao, Research on system evaluation method of weapon recoil, Journal of North University of China (Natural Science Edition), 33 (4) (2012) 387–391+407.
C. Wang, W. Xu and C. Xu, Research on assessment method for sensible gun recoil, Acta Armamentarii, 35 (11) (2014) 1743–1749.
G. Gu, H. Song and X. Ma, Research on recoil technology of electromagnetic rail launcher, Journal of Nanjing University of Science and Technology, 44 (6) (2020) 759–764, DOI:https://doi.org/10.14177/j.cnki.32-1397n.2020.44.06.017.
P. Zhao, Y. Li and J. Dong, The optimized design of muzzle brake for a sniper grenade launcher, Journal of Gun Launch & Control, 41 (2) (2020) 59–63, DOI:https://doi.org/10.19323/j.issn.1673-6524.2020.02.012.
Y. Lu, K. Zhou, L. He, J. Li and X. Huang, Research on the floating performance of a novel large caliber machine gun based on the floating principle with complicated boundary conditions, Defence Technology, 15 (4) (2019) 607–614, https://doi.org/10.1016/j.dt.2019.05.001.
Z. Zhao, Y. Li and K. Wang, Research on recoil optimization of front-shooting platform based on virtual prototype, Computer Simulation, 36 (10) (2019) 20–24.
Y. Yang, Y. Wang and C. Xu, Rifle-human musculoskeletal model and its inverse dynamic simulation, Journal of Vibration and Shock, 37 (9) (2018) 100–105, DOI:https://doi.org/10.13465/j.cnki.jvs.2018.09.016.
M. Taraszewski and J. Ewertowski, Complex experimental analysis of rifle-shooter interaction, Defence Technology, 13 (5) (2017) 346–352, https://doi.org/10.1016/j.dt.2017.05.021.
R. Trebinski, Z. Leciejewski, J. Kijewski, D. Gozdzik and D. Szupienko, Investigations on influence of rifle automatics system action on values of energetic efficiency coefficient of muzzle brakes, Defence Technology, 18 (10) (2022) 1741–1747, https://doi.org/10.1016/j.dt.2021.06.003.
T. Tan, Analysis of dynamic characteristics of a new low recoil automaton, Master’s Thesis, Nanjing University of Science and Technology, China (2020) DOI:https://doi.org/10.27241/d.cnki.gnjgu.2019.000881.
D. Sun, H. Sun and Y. Li, Statistical analysis of shoulder force based on standing shooting, Journal of Vibration, Measurement & Diagnosis (4) (1998) 33–36+74, DOI:https://doi.org/10.16450/j.cnki.issn.1004-6801.1998.04.007.
T. Liu, X. Xia and P. Lu, Testing of recoil caused by airdrop pneumatic launching of UUV, Proceedings of the 2021 Academic Conference of the Testing Technology Group of the Ship Mechanics Academic Committee of the China Shipbuilding Engineering Society, 6 (2021) DOI:https://doi.org/10.26914/c.cnkihy.2021.062023.
F. Wang, J. Lu and D. Li, The influence of support stiffness on the accuracy of weapon recoil force testing, Journal of Vibration, Measurement & Diagnosis (3) (1992) 33–37, DOI:https://doi.org/10.16450/j.cnki.issn.1004-6801.1992.03.007.
Y. Zhang, Method research for energy measurement of recoil testing technology, Journal of North University of China (Natural Science Edition) (3) (2005) 219–221.
J. Chen, F. Yin and X. Guo, Research on measure method of recoil force for handheld firearms, Journal of Ordnance Equipment Engineering, 42 (6) (2021) 75–78.
J. Bao, C. Wang and D. Kong, Mechanical admittance measurement and analysis of gun-shoulder system of standing nonrest automatic weapon, Acta Armamentarii (6) (2006) 1095–1098.
S. lv, Research on the recoil force testing technology scheme for high-speed automatic weapons, Master’s Thesis, North University of China, China (2011).
Y. Yao, Study on the measure technology of recoil force for mounted weapon, Journal of Test and Measurement Technology, 24 (2) (2010) 124–127.
Z. Jin and G. Ballistics, Gun Internal Ballistics, Beijing University of Technology Press, Beijing, China (2004).
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This work is supported by Research Program supported by the National Natural Science Foundation of China (No. 52275256).
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Hengsha Liu is studying for his doctorate at Nanjing University of Science and Technology, Nanjing, Shina. His current research interests include structure and vibration.
Cheng Xu is now a Professor and a doctoral supervisor of Nanjing University of Science and Technology. His current research interests include the study of new concepts, new structures, and new principles of weapons.
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Liu, H., Xu, C. Experimental study on the influence of mounting and ground conditions on the shoulder force of typical machine guns. J Mech Sci Technol 38, 2301–2309 (2024). https://doi.org/10.1007/s12206-024-0411-7
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DOI: https://doi.org/10.1007/s12206-024-0411-7