Deformation Calculating Of Electromagnetic Launcher's Rail Subjected To Different Functions Magnetic Pressure

The electromagnetic gun is a new concept weapon, the technology of its hasinestimable application potential not only in the military field, but also in aviation,aerospace, transportation, industrial production, scientific research and other fields.Therefore, accurate calculation of force-deformation of the electromagnetic launcher's railcan help to extend the rail life and improve the firing accuracy. As a high-tech andhigh-precision electromagnetic launcher, accurate theoretical analysis and calculation inengineering are require.The errors resulting from the uniform pressure used to replace the variable force inanalytical solution of practical engineering problems, which hinder practical application ofrailguns.This paper includes aspects as follows.Firstly, the background and the significance of research of the subject and thedevelopment of the electromagnetic launcher in aspects of domestic and abroad areintroduced. Moreover, the basic principle of the electromagnetic launcher is introduced.The electromagnetic launcher's rail can be modeled as a beam on elastic foundation bymoving load. A mathematical model of electromagnetic launchers is built by Euler beamtheory.Secondly, the electromagnetic launcher's rail can be modeled as a beam on elasticfoundation by moving load. To build the mechanical model, the analytical solution to theequation subjected to exponential function, logarithmic function and quadratic functionpressure is derived by variable method and the Lagrange equation.Mostly, the influence on the deformation of beam was numerically analyzed on theelastic coefficient, the damping coefficient, the mass of rail and the load's velocity withMATLAB software. Then the paper analyzes the deformation of rail in different parameterby ANSYS software. The result shows that the simulation results have a similar trend totheoretic calculation on the whole.The results above laid a foundation for the deformation calculating of the electromagnetic launcher's rail subjected to magnetic pressure of arbitrary function andthe practicality of the electromagnetic guns.