Abstract In this paper, a new method is proposed to identify the frequency and amplitude of weak signals by using non-smooth system. The variable scale limit system smooth discontinuous (SD) oscillator without considering phase adopted as identification By stochastic subharmonic-like Melnikov method, an analytical expression chaotic threshold under Gaussian white noise given. Based on diagram P...

Ballast mats are considered as an effective solution for reducing vehicle-induced vibrations. However, the research on vibration characteristics of each part ballasted track with a ballast mat is limited. In this study, reduction effects evaluated by numerical and experimental analysis using wheelset drop tests. A three-dimensional model consisting wheel, contact between them built rigid–flexib...

It is meaningful to understand the effect of inter-vehicle damper and its parameters on high-speed train dynamics in context suspension design or optimization. In this study, Multi-body System (MBS) modelling a CRH with firstly carried out, which simplified-parametric model was proposed validated depict damping characteristics damper. Simulation results using MBS show that devised can obviously...

utilizing the gathered failure data and failure interval data from tabas coal mine in two years, this paper discusses the reliability of powered supports. the data sets were investigated using statistical procedures and in two levels: the existence of trend and serial correlation. the results show that the powered supports follow the gamma reliability function. the reliability of the machine de...

Defective wheels pose a significant challenge in railway transportation, impacting operational performance and safety. Excessive traction braking forces give rise to deviations from the intended conical tread shape, resulting amplified vibrations noise. Moreover, these contribute accelerated damage of track components. Detecting wheel defects at an early stage is crucial ensure safe comfortable...

The mechatronic vehicle developed within the Shift2Rail projects Run2Rail, Pivot, NEXTGEAR, and Pivot2 is evaluated with respect to wheel wear. KTH wear model used determine coefficients of Archard’s map reproduce measured worn profiles present running on Metro Madrid line 10. same then evaluate performance controlled two variants a feedforward controller. first one uses on-board measurements, ...