Theoretical Modeling and Experimental Study of a Mortar Concentric Eddy Current Recoil Mechanism
To improve mobility,modern mortars are constantly developing in the direction of being vehicle-mounted,and the development of a compact,low-recoil mechanism for mortar to replace the cumbersome base plate metal structure has become a new trend in the development of lightweight and high-mobility mortars.To address this issue,a mortar concentric eddy current recoil mechanism was proposed,and an electromagnetic finite element model of concentric eddy current recoil mechanism was established under the firing load,damping performance,air gap magnetic field with eddy current field characteristics of the eddy current recoil mechanism analyzed.The damping performance of the eddy current recoil mechanism was studied under different structural parameters.The concentric eddy current recoil mechanism firing test device was developed and firing tests were carried out.The maxi-mum recoil acceleration was 377g with a 60 g charge,and the maximum recoil velocity is 12.33 m/s with a 215 mm recoil displacement.Simulation results of the recoil displacement have an error of 5.11％compared with the experimental value,which verified the accuracy of the simulation model.The results show that reducing the working air gap between the composite inner cylinder and the magnet is condu-cive to increasing the magnetic field strength.With the thickness of the composite inner cylinder being more than 1.5 mm,the effect of current density gain is not obvious and leads to a decrease in the damping performance.
concentric eddy current damperlaunching loadrecoil mechanismelectromagnetic damping force
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