Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 18, 2020 - November 20, 2020
Hunting oscillation is unfavorable to the running stability because it can generate relatively large lateral force between the wheels and tracks. In order to assess the running stability, hunting motion test is usually conducted using a real bogie on roller rigs. Hunting occurs at a certain speed without any disturbance. However, even below the hunting speed, hunting can occur when disturbance is input. The former study showed that there exists a clear point where initial lateral displacement of the wheelset caused hunting oscillation and the point originates from unstable limit cycle. Therefore, the author tried to calculate the unstable limit cycle by utilizing the shooting method, which can calculate periodic solution for nonlinear system. This paper reports summary of the shooting method and its application for vehicle dynamics model, then examines the validity of the result obtained by the method.
