Purpose: To determine the wheel-rail wear rate with increased axial load and a car underframe specific design. Methods: Statistical analysis of cause-and-effect relationship factors affecting dynamics train passing over track irregularities; in-depth interaction system. This allows assessing causes existing problems in field railway rolling stock operation as well substantiating emerging issues, proposing relevant up-to-date solutions promising developments industry. Results: data on...

Objective: to consider the issue of diagnostics modern diesel engines, in particular vibration diagnostics. Consider strategies and methods based on vibroacoustic signals that allow you track diagnose engine malfunctions, as well an assessment working process engine. To determine which means measuring parameters processing can be considered most reliable informative. Propose make adjustments currently used signals. Methods: comparison effectiveness measurement tools mathematical signal...

The article presents the model of a linear regression for predicting sliding zones pressed connections reaching significant values under high loads. Sliding as response function in multiple have been determined on results calculation wheel-set with method finite-elements. Meantime, numerical experiment contained all combinations parameters loadings. components proposed models evaluated: criteria inclusion and exclusion variables, coefficients correlation, determination, statistics...

The paper considers approaches to optimization of known designs traditional rolling stock beam. authors have studied a classic case loading console with force. They gained values stress and full deformations for rectangular cross-section. possibility optimize design by means decrease mass prevention actual above the limit material fluidity (local hasn’t been considered). On basis analysis results they proposed more rational profile - its construction is optimized along horizontal transverse...

Refinements of the wear model individual sections profile rolling surface wheel were made based on data obtained when calculating curvature and radius worn profile, as well angles inclination tangent to it at different values. For this purpose, mathematical dependencies finite difference method, analytical expressions, regression equations are used describe locations reference points. To reduce calculation error, initial points is taken into account. further research, a curve with constantly...

Based on the data obtained by calculating curvature and radius of worn profile, as well angles inclination tangent to it at different rolling, a refined wear model is considered. For this purpose, additional graphs are constructed according rolling taking into account very complex nature wheel rail contacting surface locations reference points. Calculation errors estimated, calculated parameters such various points corrected. further research theoretical nature, analytical expressions used,...

The article views a specified model of the wear separate rolling surface part profile based on data achieved under calculation curve and radius worn also angles inclination tangent several rollings. To achieve goal mathematical dependencies are used, as well power-law dependences to describe curves wheel different positions reference points. calculations errors evaluated, calculating parameters corrected, such in For further theoretical researches analytical expressions used which graphical...

Objective: Investigation of deformations and stresses in solving problems contact strength the interaction a railway wheel rail. Methods: The main methods for determining stress-strain state at two cylindrical bodies are given. provisions theory deformation elastic used formulation plane problem elasticity. Based on integrating system differential equations, paper provides solution displacements when all boundary conditions met spatial elasticity during rolling sliding same material....

Purpose: Investigation of stresses on contact surface during interaction a railway wheel and rail from normal pressure tangential forces in the presence adhesion sliding zones different sizes. Methods: Formulas for equivalent plane deformation stress state are given used calculations. Special attention is paid to study at boundary points cylinders, which parameters calculated between zones. Results: The distribution zone their maximal values carried out, dependence friction coefficients...

The authors have analysed and determined curvature radius of worn contour a wheel an inclination angle tangent. They got dependence value tread surface wear from mileage. influence the first-order derivative on refined formula for that radius. As result, they limits applicability formulas will allow using them in calculations at studying contour.

The paper provides main methods for determining stress-strain condition of interaction a wheel and brake shoe the railway rolling stock. It also shows possibility using plain elastic problem. authors have analysed peculiarities method studying in contact zone based on known statements classic elasticity theory. They carried out calculations stress components by analytic method, studied influence normal shear forces presented danger tension stresses. gained results confirm significant...