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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo
Paper 93
The Rail: A Sensor for Measurement of Forces Applied by the Wheel M. Bruner, E. Carano and G. Malavasi
Faculty of Civil and Industrial Engineering (D.I.C.E.A.), University of Rome (Sapienza), Italy M. Bruner, E. Carano, G. Malavasi, "The Rail: A Sensor for Measurement of Forces Applied by the Wheel", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 93, 2014. doi:10.4203/ccp.104.93
Keywords: derailment ratio, wheel-rail contact force, force measuring, strain, finite element model.
Summary
Vehicle lateral stability during cornering can be investigated as a function of the
resulting wheel-rail contact forces: lateral (Y) and vertical (Q). European Standards
and stability studies on running vehicles denote the importance of knowledge of
these values to set their limits, based on the assessment of the derailment ratio
(Y/Q). The value of contact forces can be measured both on the wheelset and on the
rail. In the latter case, the rail becomes a device to measure contact forces (Y and Q).
The measurement of strain on the rail allows the computation of the resulting lateral
forces (Y). Strain values are acquired on the surfaces of the rail web by means of
strain gauge pairs. This paper illustrates the assessment process, experimental and
theoretical, required for a sufficiently accurate calculation of lateral forces (Y) by
establishing vertical surface stresses starting from measurement of strains.
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