In order to study the impact of the arrangement of recoil mechanisms on firing accuracy,force analysis and muzzle vibration influencing factors were conducted according to the structural fea-tures and launching principles of a large-caliber wheeled gun.A dynamic model of the rigid-flexible coupling multi-body system of the entire large-caliber wheeled gun was successfully established.The recoil movement law of different arrangements of the recoil mechanism was obtained by numerical cal-culation.Three arrangements of the recoil mechanisms were improved and subjected to fireworks algo-rithm analysis,and the layout scheme with the least impact on shooting accuracy was finally deter-mined.The muzzle disturbance after optimization was reduced by 39.6%,42.4%and 28.2%respec-tively compared with that before optimization.The research results show that the proposed optimization method combining numerical simulation with the fireworks algorithm is feasible.They also show that the arrangement with two symmetrically-arranged recoil brakes and counter-recoil mechanisms offset from the center has better firing accuracy than other arrangements.
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