回転二円板装置を用いた鉄道のきしり音に関する検討

（物理モデル編）

抄録

To simulate squeal noise at curved sections in railway lines and control the noise, a prediction model is required. In this study an analytical model for vibrations of both a railway wheel and rail has been developed for prediction of squeal noise. The model is based on complex lumped parameter system from vibration characteristics of the wheel and rail, and the contact forces between them. This model also includes the two coupling factors, i.e., between a wheel and rail, and, between the vibration directions. Parameters of the two-disc test rig that consists of two discs corresponding to a wheel and rail are applied to the model for the verification. By using the model, the vibration of both discs related to squeal noise are well simulated and the peaks at the natural frequencies of the discs can be seen. These results show good agreement with the experimental results. Through the comparison of time histories between the analysis of the model and experimental result, the overall trends that wheel vibration repeats greater and smaller can be also well simulated. This suggests that the proposed model simulates the vibration related to squeal noise.