Theoretical Analysis and Experimental Study on Rail Dynamic Load of Electromagnetic Launcher

Abstract

Abstract In the course of electromagnetic launch, the rail deflection deformation seriously affects the service life and launch accuracy of the orbit. In order to reduce the deflection deformation in the process of orbital launch, based on the principle of electromagnetic emission, simplifying the orbit to Euler-Bernoulli beam, built moving load working conditions of the electromagnetic moving load model, using the electromagnetic launcher bore related structural parameters and material parameters for the rail electromagnetic theory analysis and calculation, the analysis results show that under the condition of the same peak current, rail the biggest position in midpoint deflection deformation; under different peak current, the deflection of the midpoint of the rail increases non-linearly. The deflection of the rail can be effectively reduced by increasing the stiffness of the elastic support. According to the above theoretical analysis results, an electromagnetic launching device was developed. The experimental comparison results show that the deflection deformation is reduced by 42.86% and the critical launch velocity is increased by 6.86% with the increase of support stiffness.