Influences of Typical Service Conditions on the Barrel Life of Large-caliber Machine Gun

doi:10.3969/j.issn.1000-1093.2016.11.002

Abstract

Abstract: The barrel life of large-caliber machine gun is closely related to the service mode and condition. The research on the influences of service conditions on barrel life is of great importance to the safe and effective use of this kind of weapons. The influences of the ambient temperature, the total amount of projectiles shot in a cooling cycle and the interval time of box magazine exchanges on barrel life of large-caliber machine gun are studied. The interface transient stress between chrome layer and steel body in barrel bore is obtained by thermoelastic coupling FEA model of gun barrel. The fatigue life of interface between chrome layer and steel body in barrel bore is solved by using local stress-strain method. The influences of service conditions on barrel life are analyzed. The influences of three service conditions on barrel life are also studied. The rules of quantitative influences of three service conditions on barrel life are obtained. A life approximation model of 12.7 mm machine-gun barrel based on the ambient temperature, the total amount of projectiles shot in a cooling cycle and the interval time of box magazine exchanges is established.

Key words: ordnance science and technology, machine gun, barrel life, service condition, thermoelastic coupling, life modeling

CLC Number:

TJ25

QI Yu-hui， YANG Ming-hua， SHAN Yong-hai， XU Cheng. Influences of Typical Service Conditions on the Barrel Life of Large-caliber Machine Gun[J]. Acta Armamentarii, 2016, 37(11): 1976-1982.

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