Hunting; Rail wheelset; Hopf bifurcation; Discontinuous nonlinearity; Routh–Hurwitz criterion; Equivalent function; Analytical approach. Abstract This paper presents an investigation on bifurcation of railway bogie behavior in the presence of nonlinearities which are yaw damping forces in longitudinal suspension system and the friction creepage model of thewheel/rail contact including clearance...

The benefits of substituting the conventional solid wheelset by independently rotating wheels (IRW) in actively steered trailed railway vehicles have already been presented in many works. If a traction system is included in this kind of vehicle it will interact strongly with the active steering system. This paper investigates how traction and active steering systems can be combined in an IRW bo...

The complexity of railway vehicle structures has been part an evolutionary process for almost two hundred years. Challenges such as increased weight, maintenance, higher costs and energy consumption have become common. vision future vehicles is to reduce complexity, hence enable simpler maintenance cost, course various research challenges arise from this. In fact, a number papers in the enginee...

Methods for multibody modelling and simulation should accurately replicate the dynamic behaviour of rail-wheel interface including precise values for wheel-rail contact positions. This paper studies the development of a novel 3-D wheel-rail contact model which is used for dynamic simulation of a suspended wheelset with parameters listed for a typical Mark IV coach. The contact point locations o...

Field tests using an instrumented powered wheelset were performed to investigate fatigue damage accumulation in railway axles. Axle bending strains measured and post-processed obtain axle stress spectra. Statistical analyses used the variations of spectra due changes operation parameters. The study indicates that can be modeled truncated normal distributions, where large majority amplitudes are...

Aerodynamic noise becomes significant for high-speed trains and its prediction in an industrial context is hard to achieve. The aerodynamic and aeroacoustic behaviour of the flow past a highspeed train wheelset, one of the main components of a bogie, are investigated at a scale 1:10 using a two-stage hybrid method of computational fluid dynamics and acoustic analogy. The near-field unsteady flo...

Wheel profile is a very important factor that helps the steering performance of railway vehicle. However, during operation, wheel tends to vary inconsistently due frictional contact at wheel-rail interface. This paper focuses on problem wheelset and its alteration affects Signal-based indirect estimation technique using Fast Fourier Transform (FFT) proposed establish relationship between dynami...