Parametric Design and Experimental Study of C-Typed Armature Under Elastic-Plastic Contact Conditions

The matching design of C-type solid armature affects the efficiency of electromagnetic launch. The elastic theory utilized in the past to analyze the initial contact state between the armature and the rails has a phenomenon where the nominal contact area is much larger than the actual contact area, which affects the analysis of mechanical contact characteristics between the armature and the track. In this paper, we adopt the normalized design idea of C-typed armature, compare the structural parameters of C-typed armature with electromagnetic launch caliber, obtain the parameters of head coefficient, throat coefficient, tail length coefficient, tail thickness coefficient, overfilling coefficient, and use the elastic-plastic model to analyze the influence of each coefficient on contact pressure, contact length and contact starting position during the loading process of C-type armature, and get the head coefficient (H_ head = 0.48), throat coefficient (H_throat = 0.45), tail length coefficient (L_tail = 1.3), tail thickness coefficient (H_tail = 0.14), interference coefficient (H_inter = 0.06), the best coefficient values of the coefficient parameter model for simulation The analysis and comparative experimental study, the test results show that the structural parameter coefficient of this armature improves the average kinetic energy of armature firing by 12.6% compared with other coefficient parameters. The effectiveness and practicality of the armature firing efficiency under this coefficient condition are proved, which provides a standard design method for the design of C-typed armatures.