Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient
The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2019-02-01
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| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/6/2/6_18-00426/_pdf/-char/en |
| _version_ | 1818840789187297280 |
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| author | Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI |
| author_facet | Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI |
| author_sort | Yosuke ICHIYANAGI |
| collection | DOAJ |
| description | The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track conditions while the vehicle runs on a service line. Therefore, it is desirable to monitor the state of the wheel/rail contact in order to ensure the running safety. Recently, a new monitoring bogie, which can measure the derailment coefficient during commercial operations, has been developed and introduced into some service lines. Large-scale data have been collected by this monitoring bogie. In this paper, the temporal subtraction analysis is carried out for preparing appropriate plan for reducing the derailment coefficient based on these data. In the analysis, the vehicle running position is important for accurate calculation of the difference between two waveforms. However, the vehicle running position contains errors because of the accumulated error of integral calculation of the vehicle velocity. The present paper proposes a method which modifies the running position along track so that the two waveforms are well matched. The proposed method is based on DP matching, and the waveforms of the track irregularity of twist estimated by the monitoring bogie are used in the method. After DP matching, an example of temporal subtraction analysis of the derailment coefficient between two periods is performed. Finally, by using the long-term measurements acquired by the monitoring bogie, the monthly variation of the derailment coefficient for a certain spot on the track is shown as a practical example. |
| first_indexed | 2024-12-19T04:15:46Z |
| format | Article |
| id | doaj.art-b6b2f2afc8a84ebe9703cfd2f11168d4 |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-12-19T04:15:46Z |
| publishDate | 2019-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-b6b2f2afc8a84ebe9703cfd2f11168d42022-12-21T20:36:19ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452019-02-016218-0042618-0042610.1299/mej.18-00426mejRunning position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficientYosuke ICHIYANAGI0Yohei MICHITSUJI1Akira MATSUMOTO2Yasuhiro SATO3Hiroyuki OHNO4Seigo OGATA5Masuhisa TANIMOTO6Atsushi IWAMOTO7Tomoki FUKUSHIMA8Takuji NAKAI9Graduate School of Science and Engineering, Ibaraki UniversityCollege of Engineering, Ibaraki UniversityCollege of Industrial Technology, Nihon UniversityNational Traffic Safety and Environment LaboratoryNational Traffic Safety and Environment LaboratoryNational Traffic Safety and Environment LaboratoryTokyo Metro Co., Ltd.Tokyo Metro Co., Ltd.Tokyo Metro Co., Ltd.Nippon Steel & Sumitomo Metal CorporationThe derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment. The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track conditions while the vehicle runs on a service line. Therefore, it is desirable to monitor the state of the wheel/rail contact in order to ensure the running safety. Recently, a new monitoring bogie, which can measure the derailment coefficient during commercial operations, has been developed and introduced into some service lines. Large-scale data have been collected by this monitoring bogie. In this paper, the temporal subtraction analysis is carried out for preparing appropriate plan for reducing the derailment coefficient based on these data. In the analysis, the vehicle running position is important for accurate calculation of the difference between two waveforms. However, the vehicle running position contains errors because of the accumulated error of integral calculation of the vehicle velocity. The present paper proposes a method which modifies the running position along track so that the two waveforms are well matched. The proposed method is based on DP matching, and the waveforms of the track irregularity of twist estimated by the monitoring bogie are used in the method. After DP matching, an example of temporal subtraction analysis of the derailment coefficient between two periods is performed. Finally, by using the long-term measurements acquired by the monitoring bogie, the monthly variation of the derailment coefficient for a certain spot on the track is shown as a practical example.https://www.jstage.jst.go.jp/article/mej/6/2/6_18-00426/_pdf/-char/enrailwayderailment coefficientmonitoringtrack twisttemporal subtractiondp matching |
| spellingShingle | Yosuke ICHIYANAGI Yohei MICHITSUJI Akira MATSUMOTO Yasuhiro SATO Hiroyuki OHNO Seigo OGATA Masuhisa TANIMOTO Atsushi IWAMOTO Tomoki FUKUSHIMA Takuji NAKAI Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient Mechanical Engineering Journal railway derailment coefficient monitoring track twist temporal subtraction dp matching |
| title | Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| title_full | Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| title_fullStr | Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| title_full_unstemmed | Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| title_short | Running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| title_sort | running position matching for the monitoring bogie and temporal subtraction analysis of derailment coefficient |
| topic | railway derailment coefficient monitoring track twist temporal subtraction dp matching |
| url | https://www.jstage.jst.go.jp/article/mej/6/2/6_18-00426/_pdf/-char/en |
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