Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2018
Date : August 28, 2018 - August 31, 2018
It is important for railway vehicles to get compatibility between curving performance and running stability. Utilizing independently rotating wheels may be an effective solution. The EEF bogie proposed by Frederich in 1980th shows good curving performance making use of gravity restoring force generated by the tread gradient of independently rotating wheels. However, the bogie gives rise to a kind of hunting motion as the vehicle running speed increases. In previous research, an effective modification of the EEF bogie which solves the hunting motion is mentioned. The solution is to incline both wheel axles while adjusting tread gradient of each wheel. It has been reported that the proposed bogie can dramatically improve the hunting stability as compared to the conventional EEF bogie from the result of eigenvalue analysis. In this paper, the EEF bogie with inclined wheel-axles is analytically evaluated by MBD simulation. The proposed bogie has excellent curving performance in tight curved section as compared to the conventional bogie and IRW bogie. Furthermore, the proposed bogie has high speed stability equivalent to the result of linear stability analysis. As those results, it is possible to achieve both high speed stability and high curving performance utilizing the proposed bogie unit in the vehicle.
