구속조건에 따른 철도차량의 주행안정성 해석

초록

This paper describes the nonlinear stability analysis of a railway vehicle for several constraint conditions. In the roller-rig tests, proper constraint conditions are required to acquire more approximate critical speed. Particularly, the test results using KRRI roller-rig are more sensitive to constraint conditions because it is a kind of semi-full car type. In this paper, nonlinear stability analysis with several constraint cases of KRRI roller-rig are carried out and compared to find optimal constraint conditions. According to the analytical results, the linear critical speed is more sensitive to the constraint conditions than the nonlinear critical speed and car-body yaw should be allowed at least to get approximate results.