波状摩耗の発生及び進展メカニズムの解明に向けた実験的・解析的検討

抄録

Since rail corrugation causes vibration and noise as the vehicle moves, elucidation of its generation and growth mechanism is an important research subject in this field. In this study, factor that determine a frequency was investigated using an actual 1/10 scale model experimental machine and a numerical analysis model simulating the experimental machine. It is a circular type of experimental machine, which can be worn by repeatedly running on the same rail. Considering the coupled vibration of the front and rear wheels, so reproducibility can be expected in the evaluation of wear progress. From the experiment results, it is confirmed that rail corrugation of about 500 Hz occurred. The numerical analysis is also a model that can run multiple times on the same rail as in the experiment. From the numerical analysis results, it is confirmed that similar to the experimental results, rail corrugation of about 500 Hz occurred. Therefore, modeling of the vibration element of the numerical analysis model is considered to be valid. In a small range of contact amount, by assuming that the nonlinear contact force is linear, an eigenvalue analysis was performed with more accurate contact stiffness applied. As a result of eigenvalue analysis, factor that determine the frequency of about 500 Hz is considered to be the elastic contact of rear wheel when the front and rear wheels are in reverse phase.