1. 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.

2. 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

3. 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)

4. 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

5. 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

6. 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

7. 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

8. 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.

9. Thank you for attention;-)