Ballast flying problems obsess the ballasted high speed railway, its microscopic mechanics is less of discovered. In the paper, the railway ballast particle force equilibrium is analyzed through basic mechanics and mathematic formula, and a model is set up to discover the factors and influence. The microscopic ballast flying model is used for ballast bed geometry and ballast shape optimization,...

Elevated summer temperatures are a disrupting factor on the rail network. Due to risk of track buckling under thermal expansion forces, geometry maintenance must be delayed during heatwaves, leading an overall decreased network availability and reliability. Track asset management support tools used plan schedule variety activities, with tamping stoneblowing being primary activities for maintena...

Purpose. Investigate and establish the relationship between track geometry measurements weather conditions to determine parameters that influence lifetime of railway tracks’ superstructure system. The study ballasted beds tracks is very important for operation maintenance in case main lines, industrial sidings mine transport. Methodology. Determination annual load selected section based on regu...

The prediction quality of discrete element method (DEM) models for railway ballast can be expected to depend on three points: the geometry representation of the single particles, the used contact models and the parametrisation using principal experiments. This works aims at a balanced approach, where none of the points is addressed with excessive depth. In a first step, a simple geometry repres...

The expansion of economic activities and increasing mobility of people on short, medium and long distance trips is an issue that requires attention in the transport industry. The need to address this demanding issue in a sustainable and economically efficient way is the core of general capacity challenge in railway industries. This informs the strategic objective of ensuring an efficient and co...