Abstract
Dynamics and running stabilities of railway bogies with a link structure are affected by coupling motion between the roll of bogies and the yaw of wheelsets, and the coupling motion depends on the offset angle of link on equilibrium position. This study constructs a model of a railway bogie, which have the link structure, to consider coupling motion between the bogie-roll and wheelsets-yaw, and investigates the traveling stability of the bogie model by time historical responses and eigenvalue analysis by using a linearized mathematical model with the link structure. First, this study shows that the proposed bogie model expresses the effects of coupling motion between bogie-roll and wheelsets-yaw. Next, this study shows that the relationship between the critical speed for stable running and the curvature radius of the track, and the effect of displacement, which is generated by moment input in the roll-direction of the bogie, to the traveling stability and safety are investigated.
