Comprehensive study of the effect of a structural parameter of hydraulic buffer on the firing stability of grenade launchers
Abstract
Introduction/purpose: The article's main goal is to present a novel method for evaluating the stability of automatic weapons mounted on tripods when firing in series.
Methods: The mathematical model is established based on the theory of many-body mechanics. The Lagrange II equation is used to establish the system of differential equations of motion of mechanical system. The mathematical model considers the influence of the ground elasticity and the impact of the gunner through elastic-damping connections. Dynamic simulations were performed on the AGS-17 grenade launcher. The calculated results were then compared with the experimental results to verify the proposed model.
Results: The comparison results show an unexpected confidence level between the theoretical model and experimental results. The errors in muzzle velocity and firing rate are 2.52% and 6.18%, respectively. Based on the theoretical basis of the mathematical model, the influence of some structural parameters of the hydraulic buffer on the firing stability of the automatic grenade launcher was investigated. The research results provide a reliable theoretical basis to improve, design, and manufacture hydraulic buffers for grenade launchers in particular and automatic guns in general.
Conclusion: The research results presented in this paper ensure high accuracy and reliability. This paper provides a reliable scientific document for the optimal design of the overall structure of the weapon system.
References
BBalla, J., Krist, Z., and Ich, L. 2015. Experimental study of turret-mounted automatic weapon vibrations. International Journal of Mechanics, 9(1).
Balla, J. 2011. Dynamics of Mounted Automatic Cannon on Track Vehicle. International Journal of Mathematical Models and Methods in Applied Sciences, 5(3), 423-422.
Ich, L. 2017. Oscillation of the particles of the gun carriage of the automatic weapon, (Ph.D. Thesis), Brno: University of Defence.
Balla, J., Havlicek, M., Jedlicka, L., Krist, Z., and Racek, F. 2011. Firing stability of mounted small arms, International Journal of Mathematical Models and Methods in Applied Sciences, 5(3), 412-422.
Dung, N, T., Dung, N, V., Phuc, T, V., and Linh, D, D. 2017. Biomechanical Analysis of the Shooter-Weapon System Oscillation, 2017 International Conference on Military Technologies (ICMT), Czech Republic. Available at: https://ieeexplore.ieee.org/document/7988729.
Bien, V, V., Phuc, T, V., and Macko, M. 2021. Effect of Some Structural Parameters on Firing Stability of Shooter-weapon System. Advances in Military Technology, 16(2), 235-251. Available at: https://doi.org/10.3849/aimt.01487.
Macko, M., Bien, V, V., Quang, M, A. 2021. Dynamics of Short Recoil-operated Weapon, Problems of Mechatronics. Armament, Aviation, Safety Engineering, 12(3), 9-26. Available at: https://promechjournal.pl/article/152432/en
Bien, V, V., Hieu, T, T., Macko, M., Dung, N, V., Phon, N, D. and Tien, V, D. 2021. Effect of Some Structural Parameters on the Firing Stability of the PKMS Machine Gun when Firing with Complicated Boundary Conditions, 2021 International Conference on Military Technologies (ICMT), 1-6. Available at: https://ieeexplore.ieee.org/document/9502820
Lu, Y., Zhou, K., He, L., Li, J., & Huang, X. 2019. 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), 607-614.
Bien, V, V., Konecny, P., and Phon, N, D. 2021. Effect of Shot Duration on the Firing Accuracy when Burst Fire of Unguided Rockets, 2021 International Conference on Military Technologies (ICMT), 1-6. Available at: https://ieeexplore.ieee.org/document/9502812
Tien, V., Macko, M., Prochazka, S. and Bien, V, V. 2022. Mathematical Model of a Gas-Operated Machine Gun. Advances in Military Technology, 17(1), 63-77. Available at: https://aimt.cz/index.php/aimt/article/view/1449
Popelinsky, L. 2000. Design of automatic weapons – calculation of functional diagram of automatic weapon. Brno: Military Academy Brno.
Balla, J., Mach, R. 2007. Kinematics and dynamics of Gatling weapons (Periodical style). Advances in Military Technology, 2(2), 121-133.
Fiser, M., Popelinsky, L. 2007. Small Arms, Brno: University of Defence.
Sy, N, T., Beer, S., Bien, V, V., Phon, N, D., and Phu, N, M. 2019. Oscillation of the Anti-tank Missile System Fagot Fired on the Elastic Ground, 2019 International Conference on Military Technologies (ICMT), 1-5. Available at: https://ieeexplore.ieee.org/document/8870069
Doan, D, V., Bien, V, V., Quang, M, A., and Phu, N, M. 2023. A Study on Multi-Body Modeling and Vibration Analysis for Twin-Barrel Gun While Firing on Elastic Ground. Applied Engineering Letters, 8(1), 36-43. Available at: https://doi.org/10.18485/aeletters.2023.8.1.5
Bien et all. 2021. Effect of some structural parameters on the operation of automatic system with simple blowback breech. 2021 International Conference on Military Technologies (ICMT), 1-6. Available at: https://ieeexplore.ieee.org/document/9502757.
Bien et all. 2021. Firing stability of automatic grenade launcher mounted on tripod. 2021 International Conference on Military Technologies (ICMT), 1-8. Available at: https://ieeexplore.ieee.org/document/9502836 .
A.S. Ahmed. 2013. Dynamics of multibody systems 4th ed. Chicago: University of Illinois.
Kari, A., Jovanović, D., Jerković, D., and Hristov, N. 2016. Stress analysis of integrated 12.7 mm machine gun mount. Scientific Technical Review, 66(4), 47-51.
Chuong, P, H. 2022. Dynamics of automatic firing gun. Military Technical Academy, Hanoi, Vietnam.
Dao, H, M. 2016. Study on the dynamics of the AGS-17 30mm grenade launcher and the effect of some structural factors on gun stability when fired (Ph.D. Thesis), Military Technical Academy, Hanoi, Vietnam.
Chaturvedi, E. 2019. Investigating T finned Barrels for Machine Guns: Enhancement in Heat Dissipation and Flexural Rigidity along with Weight Reduction. Advances in Military Technology, 14(1), 59-69. Available at: https://aimt.cz/index.php/aimt/article/view/1254
Liu, Q., Zhou, K., Shen, C., and He, L. 2021. Effect of an Internal Impact Balance Mechanism on the Perceptible Recoil of Machine Gun. In E3S web of conferences 231, 03001. Available at: https://doi.org/10.1051/e3sconf/202123103001
Hai, N, T., Phu, N, M. 2019. Vibration of launcher on multiple launch rocket system BM-21 with the change of rocket’s mass center when fired. Journal of Science and Technique, 14(3).
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