Reliability Analysis And Simulation Research On The Firing Mechanism Of Gatling Weapon

In this paper,the reliability analysis and simulation research on the firing mechanism of the Gatling weapon are carried out from the two aspects of mechanism reliability and structure reliability.In the aspect of mechanism reliability,firstly,the working principle of the trigger mechanism of the Gatling weapon is introduced,the advantages and disadvantages of the electric and mechanical trigger mechanisms are analyzed,and the fault tree models of the electric and mechanical trigger mechanisms are established.Through fault tree analysis,the influence of parameters on mechanical trigger mechanism is simulated,and the relevant variable curves of mechanical trigger mechanism are obtained.The influence of radio frequency,stiffness coefficient of pin spring and pre-pressure of pin spring on pin speed and pin protrusion is analyzed.The firing reliability of the electric firing mechanism is simulated and analyzed,and the maximum allowable wear of the firing needle is calculated by using parametric method.Secondly,taking the mechanical trigger mechanism as an example,the movement reliability of the trigger mechanism is simulated.Based on the normal distribution of the main random variables,the Monte-Carlo method is used to simulate the parameters,analyze the sensitivity of the pin protrusion,and calculate the speed reliability and acceleration reliability.In the aspect of structural reliability,the finite element simulation of the impact process between pin and primer,the matching process between nose and body,and the fatigue life of pin spring are carried out.The reliability design of the pinpoint structure is optimized by using 6Sigma.The effects of the length and radius of the pinpoint on the maximum equivalent stress,maximum equivalent strain and minimum safety factor are analyzed,and the corresponding probability distribution is obtained.Based on ADAMS multi-body dynamics analysis,the dynamic model of M134 7.62 mm rotary weapon mechanical firing mechanism is established.The influence of firing mechanism parameters is simulated and the motion reliability of firing mechanism is calculated.The firing pin outburst and firing speed are analyzed.The parametric simulation analysis of the electric shock mechanism of AK630 30 mm Gatling weapon is carried out,and the maximum allowable wear of the pin is obtained.In addition,aiming at the main random variables of the motion of the mechanical trigger mechanism,the sensitivity of the pin protrusion is analyzed and the motion reliability is calculated.Based on ANSYS Workbench finite element simulation analysis,the pin strength and the pin fatigue life of M134 7.62 mm rotary weapon mechanical firing mechanism are calculated.Then the equivalent stress and strain of the pin spring are analyzed in dynamic process,and the pin spring is fatigued by applying impulse load.The reliability design of the pinpoint structure is optimized by using 6Sigma.The maximum equivalent stress probability distribution,the maximum equivalent strain probability distribution and the minimum safety factor probability distribution are obtained.This paper provides a method and idea for reliability analysis of the firing mechanism of the Gatling weapon,and provides a technical reference for the design of the firing mechanism of the Gatling weapon.