Publication detail

Numerical Analysis of Dynamical Response in Railway Switches and Crossings

SALAJKA, V. SMOLKA, M. PLÁŠEK, O. KALA, J.

Original Title

Numerical Analysis of Dynamical Response in Railway Switches and Crossings

Type

conference paper

Language

English

Original Abstract

Extreme stresses in all components of permanent way occur in switches and crossings during the passage of railway vehicles. Additional dynamic loading originates from changes in the track stiffness along the railway turnout, or alternatively from impact forces caused at points with geometrical imperfections. The stresses can be reduced by controlling track stiffness using rail fastenings with rail pads of different elasticity, or special elastic pads in slide plates in switches. A procedure for the numerical analysis of the dynamic response during the passage of railway vehicles is described. The solution is based on the finite element method (FEM), which is used for the calculation of track stresses. An FEM model was used with a fine structure that included all components of switches and crossings, including movable parts. The excitation forces are defined on the basis of the assumed interaction between track and vehicle. The track stiffness defined by FEM analyses is used for the calculation of dynamic vertical and lateral wheel load (Q and Y forces). A special model of a railway vehicle was built with the aim of calculating the forces at points where abrupt stiffness changes occur, as well as geometrical imperfections in the frog structure. The obtained excitation forces are backwards applied in the dynamic response calculation by the FEM. Dynamic response is analyzed by the direct integration of differential kinetic equations. The analyses described above were used as a tool for the design of track stiffness controlled by rail pad elasticity. The final arrangement of rail fastenings in the switches and crossings of a typical turnout structure was obtained via the optimization of the dynamic response within the interaction between railway track and vehicle.

Keywords

Numerical Analysis

Authors

SALAJKA, V.; SMOLKA, M.; PLÁŠEK, O.; KALA, J.

Released

22. 5. 2015

Location

Osaka, Japonsko

ISBN

9781138028937

Book

Applied System Innovation - Proceedings of the International Conference on Applied System Innovation, ICASI 2015

Pages from

1163

Pages to

1168

Pages count

6

BibTex

@inproceedings{BUT164896,
  author="Vlastislav {Salajka} and Marek {Smolka} and Otto {Plášek} and Jiří {Kala}",
  title="Numerical Analysis of Dynamical Response in Railway Switches and Crossings
",
  booktitle="Applied System Innovation - Proceedings of the International Conference on Applied System Innovation, ICASI 2015",
  year="2015",
  pages="1163--1168",
  address="Osaka, Japonsko",
  doi="10.1201/b21811-233",
  isbn="9781138028937"
}