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BOGIES
Simulations of
running dynamics
in bogie design
and development
Bombardier Transportation develops and produces bogies for a complete range
of modern railway vehicles
1,2
. The calculations and analyses of running dynamics
play an indispensable part in the development of these products. This article
outlines the usage of computer techniques to investigate vehicle dynamics
during the individual product development phases of a project, the typical
calculations and the latest challenges on running dynamics, illustrated with
examples picked up among Bombardier’s experiences.
Oldrich Polach, Running dynamics and parameters are based on a first estimation
Chief Engineer Dynamics,
engineering process only. The parameters of suspension and
Business Unit Bogies,
Bombardier Transportation and
The phases of the railway vehicle other coupling elements have to be
European Railway Review engineering process in relation to time and optimised based on the target values given
Editorial Board Member
knowledge of input parameters used for by the standards and vehicle specification.
simulations of running dynamics are Output values required for other
illustrated in Figure 1 opposite. engineering activities such as movements
Dynamic simulations are already and loads are calculated to support the
applied at an early stage for concept engineering process.
investigation and feasibility study. In the verification (detail) design
The models applied here are normally phase, the vehicle topology is frozen.
based on other similar vehicles and The vehicle is modelled in detail in order
most of the input parameters are to acquire exact vehicle behaviour.
estimated. Input parameter uncertainty is The parameters of elements are specified
covered by parameter variation and and if possible also verified by
sensitivity tests. measurements on prototype elements.
The main part of the dynamic The aim of the verification phase is to
calculations takes place during prove conformity with the limiting values
vehicle design. In the optimisation stated in the standards and regulations,
(preliminary) design phase, the vehicle as well as the vehicle specification.
layout is specified, but the input A failure analysis and a sensitivity
76 EUROPEAN RAILWAY REVIEW
l
ISSUE 3
l
2008
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