Freight train air brake models
Модели пневматических тормозов грузовых поездов
2021-12-21
SCID: 54.1/fs8ree8h
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fluid dynamics modelsfluid-empirical dynamics modelsfreight train air brakesrailway train air brake modellingwheel-rail adhesion
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Abstract (AI)
This paper is an outcome of an international collaborative research initiative.Researchers from 24 institutions across 12 countries were invited to discuss the state-of-the-art in railway train air brake modelling with an emphasis on freight trains.Discussed models are classified as empirical, fluid dynamics and fluid-empirical dynamics models.Empirical models are widely used, and advanced versions have been used for train dynamics simulations.Fluid dynamics models are better models to study brake system behaviour but are more complex and slower in computation.Fluid-empirical dynamics models combine fluid dynamics brake pipe models and empirical brake valve models.They are a balance of model fidelity and computational speeds.Depending on research objectives, detailed models of brake rigging, friction blocks and wheel-rail adhesion are also available.To spark new ideas and more research in this field, the challenges and research gaps in air brake modelling are discussed.
Key Findings
1
Air-brake models are classified into empirical, fluid-dynamics, and fluid-empirical-dynamics categories.
2
Depending on research objectives, models may also include detailed representations of brake rigging, friction blocks, and wheel-rail adhesion; the paper identifies remaining challenges and research gaps.
3
Empirical models are widely used, including advanced versions for train-dynamics simulations, while fluid-dynamics models represent brake-system behaviour more accurately but require greater computational effort.
4
Fluid-empirical-dynamics models combine fluid-dynamics brake-pipe models with empirical brake-valve models, balancing model fidelity and computational speed.
5
The paper synthesizes railway freight-train air-brake modelling research through an international collaboration involving 24 institutions across 12 countries.
Research Object
freight train air brake systems
Research Subject
air brake modelling approaches, including model fidelity, computational speed, and challenges in representing brake-system behaviour
Publication Details
Publication Date
2021-12-21
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