Research of system reliability based on sight mount on composite barrel of recoilless gun

DOI:	10.11809/bqzbgcxb2023.10.006
Keywords:	recoilless gun, composite tube, reliability, impact test, deformation rate, vibration acceleration
Abstract:	Compared with mechanical connection of sight mount on the metal recoilless gun barrel, the sight mount connected to the recoilless gun composite barrel by binding is easy to lose the binding wire, wire collapse and other problems, which might result in the connection reliability and accuracy of aim. In order to verify the reliability of the sight mount on the recoilless gun composite barrel during its life cycle, the real gun firing test is adopted, and the maximum axial and circumferential deformation rates are 0082% and 0.08%, and the peak vibration accelerations in the X, Y and Z directions respectively are 213g, 258g and 230g. Based on the test results of real gun, the standard peak acceleration in X direction and pulse width of impact test are analyzed and determined to be 225g and 2 ms, respectively. The results of impact test show that the structure, strength, size, and binding connection of sight mount with recoilless gun meet the reliability requirements. The deviation value of the bore size of the recoilless gun is 0.01 mm to 0.03 mm, and its variation value belongs to the controllable range, which has little influence on the firing effect. The zero moving momentum of the system is less than 0.2 mil after the gun is equipped with the sight, the distance deviation value of the projectile hitting the target is about 8 cm for the 400 m vertical target density test, which meets the requirement of shooting accuracy. The sight mount can be used as a connection mechanism between the composite barrel of the recoilless gun and the sight.
Issue:	Vol. 44 No. 10 (2023)
Published:	2023-10-28
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