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Estimation of the wheel-rail lateral contact force through the analysis of the rail web bending strains.pdf
Measurement 99 (2017) 23–35
Contents lists available at ScienceDirect
Measurement
journal homepage: /locate/measurement
Estimation of the wheel-rail lateral contact force through the analysis of the rail web bending strains
D. Cortis a,, M. Bruner a, G. Malavasi a, S. Rossi b, M. Catena b, M. Testa b,1
a DICEA – Department of Civil, Building and Environmental Engineering, Sapienza University of Rome, Via Eudossiana 18, Rome, Italy b RFI – Italian Infrastructure Manager, Technical Direction, Piazza della Croce Rossa 1, Rome, Italy
article info
Article history: Received 12 September 2016 Received in revised form 6 December 2016 Accepted 6 December 2016 Available online 8 December 2016
Keywords: Wheel-rail lateral contact force Wayside measurement Force measuring Bending moment Rail web strain Finite element model
abstract
Vertical overloads and imbalances in the composition of a railway vehicle can result in damage to the track and in a non-conformity regarding safety of operation. On the other hand, wheel-rail lateral contact forces are more directly involved in the running safety and deserve a special focus. In this paper, an experimental approach to estimate lateral forces applied by rolling stock to the track is presented. The method is based on the analysis of bending strains in the cross plane of the rail web. This approach allows the decoupling of effects of the lateral force from those of the vertical one with a simple combination of bending stresses measured on the rail web. The research uses ?nite element simulations and laboratory tests. The numerical and experimental results have identi?ed an independent coef?cient from the applied loads by which it is possible estimate the magnitude of the lateral force.
ó 2016 Elsevier Ltd. All rights reserved.
1. Introduction
The monitoring and veri?cation of contact forces, applied by rolling stock to the track, is a fundamental topic of study for Railway Administrations and Research Institutions. Vertical overloads an
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