Dynamic Responses for rails and panels of electromagnetic rail launcher in the electromagnetic forces

摘要

The mechanical model for rails and panels of rectangle electromagnetic rail launcher under working condition were simplified as dynamic responses of bi-layer elastic foundation beams. The electromagnetic forces make rails and panels vibrate, which directly affects the launching accuracy. The mechanical equilibrium equation of bi-layer elastic foundations beams was established in this article, and the distributed loads related to armature movement were expressed by Heaviside function. The modes of vibration were given by the boundary conditions. Based on the above results, the dynamic displacement and stress analytical solutions for rails and panels were given by solving homogeneous and nonhomogeneous equation. Dynamic responses of rails and panels were calculated and analyzed against the due kinetic and structure parameters, and the analytical solutions were verified by the comparison with ANSYS results. The research results can be some reference to strength and rigidity design for rails and panels of rectangle electromagnetic rail launcher.