Ride comfort is one of the most important dynamic performance characteristics of railway vehicles and it is affected by various factors such as vibration, noise, smell, temperature, visual stimuli, humidity and seat design. Evaluating ride comfort is not simple because all these factors must be considered simultaneously. In general, vibration, which originates from vehicle motion, is taken as t...

The evaluation and control of the trains induced vibrations needs even more attention in the case of underground tracks which passes near to monuments and historical sites. The rail corrugations which occur due to the wheels’ impulse loads during the operation period of underground railway tracks, usually amplify the ground borne noise and vibration. In the current study, the mentioned phenomen...

The railway industry has focused on the improvement of maintenance through use novel technologies. Recently, utilisation repair welding to restore worn area wheels been investigated, as it can bring significant savings in wheelset maintenance. Under an Innovate UK AURORA project, a wheel that previously operated London Underground (LUL) was restored using this process. To test its performance a...

rails fracture by the growth of fatigue crack or critical crack is one of the prevalent defects in railway. the rail fracture, failure and stress analysis should be studied in order to prevention of rail fracture. in this paper, new formulation of contact stress for two rolling bodies is presented, where the results are closed to the hertz stress formulation. moreover, stress analysis is done b...

This paper proposes an active steering controller for Driven Independently Rotating Wheelset (DIRW) vehicles based on deep reinforcement learning (DRL). For the two-axle railway equipped with Wheelsets (IRWs), each wheel connected to a wheel-side motor, Ape-X DDPG controller, enhanced version of Deep Deterministic Policy Gradient (DDPG) algorithm, is adopted. Incorporating Distributed Prioritiz...

The ability to perform rolling contact fatigue (RCF) experiments in wheel–rail material is provided by a new small–scale test rig, manifesting the actual dynamic behaviour of the railway system. In this paper, a multi-body dynamics (MBD) model is proposed, simulating the vibration behaviour of the prescribed rig. The new testing facility is modelled using a three-dimensional model of the vehicl...

This paper provides experimental data on the effective use of a new lubricating composition, which includes industrial oil any brand with addition nanometal component friction pair, has lower hardness. It is shown that this composition significantly reduces wear resistance rails and wheels rolling stock during operation, prevents electrochemical corrosion pair wheel–rail and, most importantly, ...