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Reducing wheel wear of a motorised metro car on a curved track with a small curve radius

Matej Jan, Orliński Piotr

Pojazdy Szynowe

2023

Nr 3-4

25--32

A structural solution was proposed to enable passive control of the wheelsets of a motorised metro car on curved track with a small curve radius. This effect was achieved by varying the stiffness of the guidance of the wheelsets in the horizontal plane of the frame of each bogie on which the wagon body rests. This ensured the required critical speed of the metro wagon when moving on straight track, and allowed for reduced mechanical wheel wear and better steering of the bogies when moving on curved track with a small radius of curvature. Parameters specific to the design of modern metro cars were taken into account. Current knowledge of non-linear lateral dynamics of rail vehicles and the specialist computer programme Vi-Rail were used to perform the calculations involving simulation models.

Bogie steering system improving alignment of the urban railway vehicle in a track

Podolski M., Słabuszewski M., Firlik B., Staśkiewicz B.

Engineering Transactions

2018

Vol. 66, iss. 4

375--390

Urban rail systems are characterized by low-radius curves which are very problematic to negotiate for modern rail vehicles. There are several inventions developed throughout time to cope with that problem. One group of them are bogie steering systems, responsible for the improvement of the alignment of carbodies in a curve, increasing ride comfort and reducing wheel and rail wear. The principle of those systems is to correct the relative settlement of bogies and carbodies during curve negotiations, to lower the angle of attack. One of such systems is described in this paper in terms of design, operation and verification. Some experimental and simulation results are presented and discussed.