The Basic Concepts of ModellingRailway Track Systems usingConventional and Finite Element Methods

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The Basic Concepts of ModellingRailway Track Systems usingConventional and Finite Element Methods

Mensagem por Manuela » 05 Set 2016, 13:49

Autor: Puguh B. Prakoso.

INFO TEKNIK, Volume 13 No. 1 Juli 2012.


Abstract:
The classical concepts of railway track analysis, such Beam on Elastic Foundation
(BOEF), Winkler’s theory or Zimmermann method are categorized as one-dimensional
analysis of a railway structure and are simplification of a beam laid on a continuous support
(soil’s subgrade or foundation). These methods are still very useful for analyzing a simple
design and analysis of railway track systems. Unfortunately, for doing a complex analysis of a
railway track, these methods have lack of capabilities, since they only take into account onedimensional
system and neglect the actual discrete support provided by crossed sleeper,
ballast, sub ballast mat and subgrade.Nowadays, the use of computer software for doing
Finite Element Method (FEM) or Finite Element Analysis (FEA) of a structure is very
common for engineers. FEA consists of a huge amount of complex calculations; therefore, a
manual calculation by hand is almost impossible to be done. Hence, the use of computer
software will be very useful in this manner. The applications of FEM using software also
widen in the field of railway infrastructure design and analysis. There are many advantages
of using FEM method using computer. However, related to its complexities, one should
understands the concepts and “knows-how” to solve the problems, to idealize the structure
into FEM model in computer, and to choose the suitable elements and its behaviours, and
also the correct method.Thispaper is presented to discuss the basic theories behind the
conventional and advanced ways of modelling of railway track system, to show the basic
concepts of modelling railway track systems using FEM, to present two- and threedimensional
FEM models of railway superstructures which are built using software ANSYS,
and to demonstrate the way of doing the verification of the results using Zimmermann
method.
Keywords: BOEF, Finite Element Method (FEM), Railway Track, ANSYS.
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