Stress Calculation and Structural Optimization of the Driving Structure of Electromagnetic Coil Launcher

The mechanical characteristics of the asynchronous induction electromagnetic coil driving device were calculated using the finite element method. A numerical model of the driving device was established in two-dimensional axisymmetric cylindrical coordinates, and a four node rectangular ring element was used for calculation by assuming the symmetric distribution of physical quantities in the circumferential direction. Using stress and strain as the solution variable, establish a mechanical equilibrium equation in the driving structure region to solve the displacement field of the structure. Based on the boundary conditions of force and displacement, obtain the spatiotemporal changes of stress and strain. The model considers inter turn insulation, excitation timing, and the mechanical properties of the GFRP material used, and can be used to calculate the time-varying magnetic field, electromagnetic load, and structural response of the driving device in the domain. Based on the numerical calculation results, a driving structure for modular assembly with bidirectional separation of shaft diameter is proposed.