Research On Dynamic Characteristics Of Large-caliber Gun Firing Process Based On Eddy Current Dampe

The use of concentric eddy current damper instead of traditional offset hydraulic recoil brake will bring significant changes in the overall layout of artillery,which is less discussed in the existing research.In order to study the influence law of concentric eddy current damper on Gun Launch Dynamics of large caliber gun,firstly,according to the previous design experience of eddy current damper and electromagnetic field finite element theory,the arrangement of permanent magnets with the same pole relative is used,and the structural parameters of concentric eddy current damper are designed by trial and error method,then,the influence of the structural parameters of the eddy current damper on the eddy current damping force is analyzed.on this basis,and then the variation law of the eddy current damping force is optimized by using the neural network agent model and genetic algorithm.the optimization results show that the designed concentric eddy current damper conforms to the recoil law of artillery;then,based on the nonlinear finite element analysis theory,the launch dynamic models of offset recoil brake and concentric recoil brake large caliber guns are established,the recoil law of the launch dynamic model of offset brake is verified through experiments,and the muzzle vibration of the two recoil brake layout models in the period of bore and recoil motion is analyzed,the contact force of key parts during recoil is also analyzed.in addition,the effects of the static deformation of the rear barrel of the concentric eddy current damper,the installation error of the eddy current damper,the shape of the cradle and the installation position of the counter-recoil mechanism on the gun launch dynamics are considered and analyzed,the results show that the concentric arrangement of the recoil brake retractor is very beneficial to reduce the muzzle vibration,alleviate the contact force between the key parts of the gun recoil,reduce the wear between parts,improve the service life and recoil stability,It also improves the stiffness and strength of the cradle and upper shelf.