Abstract Purpose The braking system used on a recently upgraded metro vehicle showed very high low-frequency noise and vibrations levels in service affecting passengers’ comfort leading to both brake calliper lever failures premature wear of pads. characteristics the phenomenon were such that it was classified as groan type. As pads with different tested trying attenuate issue without success, ...

The elastic vibration of the wheelset is a potential factor inducing wheel-rail defects. It important to understand natural characteristics flexible for slowing down defect growth. To estimate free railway with multidiameter axle, transfer matrix method (TMM) applied. matrices four types beam models are derived including Euler–Bernoulli beam, Timoshenko without mass and shearing stiffness, mass...

Reduction of the force interaction between vehicle and track is strongly desirable for many reasons. Because conventional methods reduction wheel-rail contact forces, based on tuning suspension parameters or utilising various mechanisms acting wheelsets, bogie-frames car-body, reach their limits, active controlled systems are becoming a promising solution problem. The paper created within proje...