360397 POTENTIAL OF ACTIVE-STEERING BOGIE FOR REDUCING LATERAL AXLE LOAD CAUSED AT WORN WELDED JOINTS OF OUTER RAIL IN CURVED TRACK(Bogie,Technical Session)

抄録

This paper deals with the potential of an active-steering bogie to reduce the marked lateral axle load that arises at the worn welded joints of the outer rail in a curved track when high-speed trains pass there. The shape of the worn joint called lateral 'angular bent' is modeled on the basis of measured irregularity shape of actual joints. Then, numerical simulation of running on a curved track is carried out with a two-axle bogie vehicle to compare an active-steering bogie and conventional non-steering bogie. The behavior of the vehicle is evaluated during passing the curve from the following point of view; that is decreasing the peak value of lateral axle load within the allowance limit and maintaining the running stability. To satisfy the requirements, wheelset supporting parameters and feedback gains for active-steering are optimized on a curved section of 400 m radius by the Genetic Algorithm. On the basis of the optimized wheelset supporting parameter values, additional sets of feedback gains, which are adjusted for the curves of different radii, are proposed. The numerical simulation shows that the vehicle with the active-steering bogies having the optimized parameter values has a potential to raise the operation speed up to the possible speed for tilting trains while satisfying the criterion of riding comfort.