Electrodynamic Response Study on Railgun Launcher Based on Electromechanical Coupling Model

Abstract

The electrodynamic behavior of a medium caliber railgun launcher has been studied based on an electromechanical coupling model, which uses a unified modeling method for both electromagnetic and electromechanical field. This model adopts a material equivalent method to simulating the sliding contact behavior during armature in bore. An embedded node encoding program during meshing operation provides good load transfer accuracy between electromagnetic field and mechanical field. Dynamic properties of magnetic field are firstly simulated and a subsequent dynamic analysis is conducted by mapping element results from electromagnetic analysis step to structure analysis step. The electromechanical-elastic response of the barrel is studied under the current. The numerical model has shown reliability compared to experimental results.