Computational Technology Resources - CCP

A. Iwamoto¹, K. Matsumoto¹, K. Yano¹, T. Fukushima¹, A. Matsumoto², Y. Sato², H. Ohno², Y. Michitsuji³, M. Tanimoto⁴ and D. Shinagawa⁵

¹Tokyo Metro Co., Ltd., Tokyo, Japan
²National Traffic Safety & Environment Laboratory (NTSEL), Tokyo, Japan
³Ibaraki University, Hitachi, Japan
⁴Nippon Steel & Sumikin Railway Technology Co., Ltd., Osaka, Japan
⁵Nippon Steel & Sumitomo Metal Corporation, Osaka, Japan

doi:10.4203/ccp.110.64

purchase the full-text of this paper

A. Iwamoto, K. Matsumoto, K. Yano, T. Fukushima, A. Matsumoto, Y. Sato, H. Ohno, Y. Michitsuji, M. Tanimoto, D. Shinagawa, "Monitoring of Derailment Coefficients "Y/Q" for In-service Trains and the Analysis for the Increase of Curve Safety", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 64, 2016. doi:10.4203/ccp.110.64

Keywords: condition monitoring, wheel-rail contact, derailment coefficient, monitoring bogies, commercial lines, methods of application.

Summary

In general, "derailment coefficient Q/P" which is an index to evaluate the running safety is commonly measured by the specially instrumented wheelsets so-called "PQ wheelsets". The derailment coefficient "Q/P" has the same meaning as the European expression of derailment coefficient "Y/Q". From the view point of the running safety assessment, the derailment coefficient should be measured every day, but PQ wheelsets cannot be applied to the commercial train in terms of the durability. Tokyo Metro introduced PQ monitoring bogies equipped with non-contact gap sensors into commercial lines from 2009. The bogie solves the problem of PQ wheelsets and enables continuous measurement of derailment coefficients during service operations. As one of the advantages of continuous measuring of derailment coefficients on commercial lines, the safety assessment based on the data of all curves on these commercial lines can be conducted every day. Furthermore, a large scale data in a long period gives substantial knowledge for safety assessment. In this paper, some examples to assess running safety utilizing data obtained by PQ monitoring bogies are mentioned. And, the analysis tool to treat a large scale data in efficient is mentioned. The daily and monthly changes of the derailment coefficient and some other analysis are introduced to demonstrate the effectiveness of the system.

purchase the full-text of this paper (price £22)

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 £85 +P&P)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 64 Monitoring of Derailment Coefficients "Y/Q" for In-service Trains and the Analysis for the Increase of Curve Safety A. Iwamoto¹, K. Matsumoto¹, K. Yano¹, T. Fukushima¹, A. Matsumoto², Y. Sato², H. Ohno², Y. Michitsuji³, M. Tanimoto⁴ and D. Shinagawa⁵ ¹Tokyo Metro Co., Ltd., Tokyo, Japan ²National Traffic Safety & Environment Laboratory (NTSEL), Tokyo, Japan ³Ibaraki University, Hitachi, Japan ⁴Nippon Steel & Sumikin Railway Technology Co., Ltd., Osaka, Japan ⁵Nippon Steel & Sumitomo Metal Corporation, Osaka, Japan doi:10.4203/ccp.110.64 purchase the full-text of this paper Full Bibliographic Reference for this paper A. Iwamoto, K. Matsumoto, K. Yano, T. Fukushima, A. Matsumoto, Y. Sato, H. Ohno, Y. Michitsuji, M. Tanimoto, D. Shinagawa, "Monitoring of Derailment Coefficients "Y/Q" for In-service Trains and the Analysis for the Increase of Curve Safety", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 64, 2016. doi:10.4203/ccp.110.64 Keywords: condition monitoring, wheel-rail contact, derailment coefficient, monitoring bogies, commercial lines, methods of application. Summary In general, "derailment coefficient Q/P" which is an index to evaluate the running safety is commonly measured by the specially instrumented wheelsets so-called "PQ wheelsets". The derailment coefficient "Q/P" has the same meaning as the European expression of derailment coefficient "Y/Q". From the view point of the running safety assessment, the derailment coefficient should be measured every day, but PQ wheelsets cannot be applied to the commercial train in terms of the durability. Tokyo Metro introduced PQ monitoring bogies equipped with non-contact gap sensors into commercial lines from 2009. The bogie solves the problem of PQ wheelsets and enables continuous measurement of derailment coefficients during service operations. As one of the advantages of continuous measuring of derailment coefficients on commercial lines, the safety assessment based on the data of all curves on these commercial lines can be conducted every day. Furthermore, a large scale data in a long period gives substantial knowledge for safety assessment. In this paper, some examples to assess running safety utilizing data obtained by PQ monitoring bogies are mentioned. And, the analysis tool to treat a large scale data in efficient is mentioned. The daily and monthly changes of the derailment coefficient and some other analysis are introduced to demonstrate the effectiveness of the system. purchase the full-text of this paper (price £22) 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 £85 +P&P)
Back to top	©Civil-Comp Limited 2023 - terms & conditions