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R. Schmid¹, P. Mittermayr², D. Maicz³ and W. Zottl¹

¹Integrated Line Management, Research & Development, ÖBB Infrastruktur AG, Vienna, Austria
²Bureau of Applied Mechanics and Mathematics, Dr. Mittermayr Scientific Consulting GmbH, Vienna, Austria
³Project Management Railway, Hottinger Baldwin Messtechnik GmbH, Vienna, Austria

Keywords: out-of-roundness, wheel flat, weigh in motion, dynamical contact forces, wear simulation, measurement site.

Summary

For more than a decade several stationary measuring sites have been installed at strategically chosen places in the network of the Austrian Federal Railways. These monitor not only overloads but also different irregularities of vehicles. Important indications to damaging vehicles are high dynamic forces. By the use of special sensors a calculation of the out-of-roundness of the wheels is possible. This allows to impressively circumstantiate the relationships found before in theoretical analyses and simulations by measuring techniques. With continuing analysis the dependency of dynamic forces on several parameters is shown and to complete the approach, the accuracy of the measurement method is considered. From these both the infrastructure operator and the train operator can benefit. The former is in a position to monitor the compliance with limits defined in the standards and to react to any irregularity immediately. The train operator profits from knowing the evolution of his vehicles condition, which enables the operator to optimise the time of maintenance measures. The experience from these projects and the long-term monitoring at the stationary checkpoints supplied valuable findings that are already used in operation.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	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 115 Out-Of-Roundness: Simulation and Real-Life Measurements R. Schmid¹, P. Mittermayr², D. Maicz³ and W. Zottl¹ ¹Integrated Line Management, Research & Development, ÖBB Infrastruktur AG, Vienna, Austria ²Bureau of Applied Mechanics and Mathematics, Dr. Mittermayr Scientific Consulting GmbH, Vienna, Austria ³Project Management Railway, Hottinger Baldwin Messtechnik GmbH, Vienna, Austria doi:10.4203/ccp.104.115 purchase the full-text of this paper Full Bibliographic Reference for this paper R. Schmid, P. Mittermayr, D. Maicz, W. Zottl, "Out-Of-Roundness: Simulation and Real-Life Measurements", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 115, 2014. doi:10.4203/ccp.104.115 Keywords: out-of-roundness, wheel flat, weigh in motion, dynamical contact forces, wear simulation, measurement site. Summary For more than a decade several stationary measuring sites have been installed at strategically chosen places in the network of the Austrian Federal Railways. These monitor not only overloads but also different irregularities of vehicles. Important indications to damaging vehicles are high dynamic forces. By the use of special sensors a calculation of the out-of-roundness of the wheels is possible. This allows to impressively circumstantiate the relationships found before in theoretical analyses and simulations by measuring techniques. With continuing analysis the dependency of dynamic forces on several parameters is shown and to complete the approach, the accuracy of the measurement method is considered. From these both the infrastructure operator and the train operator can benefit. The former is in a position to monitor the compliance with limits defined in the standards and to react to any irregularity immediately. The train operator profits from knowing the evolution of his vehicles condition, which enables the operator to optimise the time of maintenance measures. The experience from these projects and the long-term monitoring at the stationary checkpoints supplied valuable findings that are already used in operation. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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