Electrodynamic response study on railgun launcher based on electromechanical coupling model

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 for the in-bore armature. An embedded node encoding program during field meshing operation provides good load transfer accuracy between electromagnetic field and mechanical field. Dynamic properties of in-bore 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 excitation current. The numerical model has shown reliability compared to experimental results. (C) 2019 The Authors. Production and hosting by Elsevier B.V. on behalf of China Ordnance Society.