An innovative degraded adhesion model for multibody applications in the railway field

Meli, Enrico; Pugi, Luca; Ridolfi, Alessandro

doi:10.1007/s11044-013-9400-9

Cited by 32 publications

(24 citation statements)

References 9 publications

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“…These cases are used merely for demonstration purposes. Adhesion characteristics and studies for braking scenarios [27,28] are also important. Wheel-rail contact and adhesion models used in this paper are also able to conduct braking studies.…”

Section: • In Simulation 2 and Simulation 3 Adhesion Modelmentioning

confidence: 99%

Train energy simulation with locomotive adhesion model

Spiryagin

Cole

2020

Rail. Eng. Science

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Railway train energy simulation is an important and popular research topic. Locomotive traction force simulations are a fundamental part of such research. Conventional energy calculation models are not able to consider locomotive wheel-rail adhesions, traction adhesion control, and locomotive dynamics. This paper has developed two models to fill this research gap. The first model uses a 2D locomotive model with 27 degrees of freedom and a simplified wheel-rail contact model. The second model uses a 3D locomotive model with 54 degrees of freedom and a fully detailed wheel-rail contact model. Both models were integrated into a longitudinal train dynamics model with the consideration of locomotive adhesion control. Energy consumption simulations using a conventional model (1D model) and the two new models (2D and 3D models) were conducted and compared. The results show that, due to the consideration of wheel-rail adhesion model and traction control in the 3D model, it reports less energy consumption than the 1D model. The maximum difference in energy consumption rate between the 3D model and the 1D model was 12.5%. Due to the consideration of multiple wheel-rail contact points in the 3D model, it reports higher energy consumption than the 2D model. An 8.6% maximum difference in energy consumption rate between the 3D model and the 1D model was reported during curve negotiation.

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Section: • In Simulation 2 and Simulation 3 Adhesion Modelmentioning

confidence: 99%

Train energy simulation with locomotive adhesion model

Spiryagin

Cole

2020

Rail. Eng. Science

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“…In this study, the effect of the varying operational patterns (e.g., the different friction coefficients, traction coefficients) on the tribological behaviour of wheel-rail interaction has been demonstrated. For the other critical operational conditions, for instance, the degraded adhesion [47,48] and the presence of contaminants [49], the developed FE model can also be employed to investigate their influence on the performance of the transient wheel-rolling contact by tuning the velocity dependent friction coefficient [50].…”

Section: Further Applications Of the Modelmentioning

confidence: 99%

Modelling verification and influence of operational patterns on tribological behaviour of wheel-rail interaction

Markine

Mashal

et al. 2017

Tribology International

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Verification of the explicit finite element (FE) model with realistic wheel-rail profiles against the CONTACT model, which has not been sufficiently discussed, is performed by comparing the resulting shear stress, slip-adhesion area, etc., obtained from the two models. The followup studies using the verified FE model on the influence of the varying operational patterns (such as different friction, traction, etc.) on the surface and subsurface tribological responses of wheel-rail interaction are accomplished through a series of simulations. It can be concluded that the results obtained from most of the explicit FE simulations agree reasonably well with the ones from CONTACT. Also, the increase of the friction and traction can bring the stress concentrations from the subsurface upwards to the surface.

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“…In Table 1, frictional coefficient values are presented for different rail surface conditions (Polach, 2005). It should be mentioned that, in Meli, Pugi, and Ridolfi (2014) and Meli and Ridolfi (2015), an adhesion model has been presented to improve the accuracy of the modeled friction forces under degraded adhesion conditions. In the new approach, the dissipation of energy at the contact surfaces is considered.…”

Section: Frictional Forces Exerted On the Wheelsmentioning

confidence: 99%

Adaptive Fuzzy Sliding-Mode Control of Wheel Slide Protection Device for ER24PC Locomotive

Mousavi

Markazi

Masoudi

2017

Lat. Am. j. solids struct.

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Wheel Slide Protection Devices (WSPD) are employed in railway vehicles to maximize the average of the possible frictional braking force, which is a nonlinear function of the slip ratio of the wheel sets. In this paper, to control the WSPD, a low-order model is presented and un-modeled dynamics are considered as uncertainties. Due to the nonlinear dynamics of the system and presence of uncertainties, Adaptive Fuzzy Sliding-Mode Control (AFSMC) is employed to regulate the slip ratio towards the desired value. The proposed controller employs a Pulse Width Modulation (PWM) technique to generate the braking torque. The second Lyapunov theorem is used to prove the closed-loop asymptotic stability. In the simulations, the switching dynamics of WSPD is considered and the multi-body dynamics method is used for modeling the longitudinal dynamics of ER24PC locomotive. The obtained results reveal that by using the AFSMC method, the slip ratios of wheel sets converge to the reference values. Unlike the conventional method, in which the fluctuations of slip ratio diverge near the stopping time, simulation studies reveal that with the AFSMC method, the stopping time of the locomotive and the fluctuation amplitude of the slip ratios are reduced.

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An innovative degraded adhesion model for multibody applications in the railway field

Cited by 32 publications

References 9 publications

Train energy simulation with locomotive adhesion model

Train energy simulation with locomotive adhesion model

Modelling verification and influence of operational patterns on tribological behaviour of wheel-rail interaction

Adaptive Fuzzy Sliding-Mode Control of Wheel Slide Protection Device for ER24PC Locomotive

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