Development of the constructions of the transport Dnipropetrovsk National University of railway transport named after academician V. Lazariana Development of the constructions of the transport infrastructure on the base of the math models for evaluation of durability, reliability and optimize investments Dr.Sc., Prof. Rybkin V.V., Ph.D., ass. Prof. Kurgan D.N. Bondarenko I.A.

Models for analysis of problems of stress-strain state of railway track settlement schemes for engineering calculations Methods of finite elements On the basis of the System of Lagrange equations The wave theory of stresses distribution

The example of location of the fronts of wave processes of a railway track elements 1 – applied force; 2 – railway sleepers; 3 – rails; 4 – ballast; 5 – front of wave propagation stress (red - the predominance of the longitudinal component(compression-tensile), blue - the predominance of the transverse component (shift), green - surface wave)

REASONS FOR APPLICATION : THE MODEL OF STRESS-STRAIN STATE OF RAILWAY TRACK ON THE BASE OF WAVE THEORY OF THE SPREAD OF STRESS REASONS FOR APPLICATION :  high speed of movement speed of the load is equal with speed of stresses distribution dynamic effects are out of bounds static and quasi-static models

REASONS FOR APPLICATION : THE MODEL OF STRESS-STRAIN STATE OF RAILWAY TRACK ON THE BASE OF WAVE THEORY OF THE SPREAD OF STRESS REASONS FOR APPLICATION :  high axial load stress a number of elements the track superstructure are similar to maximum permissible value geometric and power unevenness are exert a greater dynamic effects

REASONS FOR APPLICATION : THE MODEL OF STRESS-STRAIN STATE OF RAILWAY TRACK ON THE BASE OF WAVE THEORY OF THE SPREAD OF STRESS REASONS FOR APPLICATION :  modern sandwich structures of rail base insufficiency models continuous of the power elastic medium significant effect at the boundaries of layers the significance of global accounting and local inhomogeneities

REASONS FOR APPLICATION : THE MODEL OF STRESS-STRAIN STATE OF RAILWAY TRACK ON THE BASE OF WAVE THEORY OF THE SPREAD OF STRESS REASONS FOR APPLICATION :  modern methods of evaluation of characteristics of the track structure strength assessment based on dynamics of changes in the stress forecasting of appearance and development of residual strains forecasting of changes of the reliability parameters

parameters of materials Assessment of operational costs Assessments of EXPECTED RESULTS Technical evaluation of the interaction between infrastructure and rolling stock Evaluation of reliability of infrastructure Economic evaluation of the design infrastructure Using of the dynamic three-dimensional system Assessment of indicators of operational resistance Accounting for Changes of loads and time reactions Assessment of investment in infrastructure Assessment on indicators of security Accounting inhomogeneities physical and mechanical parameters of materials Assessment of operational costs Assessments of indicators of maintainability Design optimization of the path-based simulation of the strength and reliability.

Thank you for attention;-)