섭동법에 의한 캡슐열차용 대차의 상하방향 불안정성 연구

초록

A levitation and propulsion system of a 1000km/h subsonic capsule train is built on. The same conceptual basis as that used by electrodynamic suspension (EDS) levitation trains equipped with an electromagnetic coil on the side walls. The characteristics of the levitation spring of the capsule train are, therefore, the same as those of the levitation spring of the EDS levitation train, with both the linear spring and the nonlinear spring present simultaneously, and the spring constants varying by train speed. This is a phenomenon caused by an 8-shaped coil installed on the side wall of the guideway, which is expected to have a considerable influence on the vertical movement of the capsule train. In this study, the effect of the nonlinear characteristics of the floating springs on the EDS floating capsule train were investigated. The governing equations of the capsule train bogie were derived by consideration of the linear and nonlinear characteristics of the levitation springs. The influence of the nonlinear characteristics of the levitation springs on the instability of the system was analyzed theoretically using the perturbation method.

키워드