Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise
In railways, on-track running tests are implemented to assess running safety against flange climb derailment. Results of tests depend on the frequency component of measured data. In this paper, the relationship between the measured data of the derailment quotient, which is the assessment quantity of...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2018-08-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/866/84_18-00081/_pdf/-char/en |
| _version_ | 1797988999586906112 |
|---|---|
| author | Hisayo DOI Hiroaki ISHIDA Takefumi MIYAMOTO |
| author_facet | Hisayo DOI Hiroaki ISHIDA Takefumi MIYAMOTO |
| author_sort | Hisayo DOI |
| collection | DOAJ |
| description | In railways, on-track running tests are implemented to assess running safety against flange climb derailment. Results of tests depend on the frequency component of measured data. In this paper, the relationship between the measured data of the derailment quotient, which is the assessment quantity of derailment, and wheel rise are investigated. The data for the investigation are obtained in a flange climb running test at low speed on a test track, which includes two sharp curves with cants. Several types of track irregularities, such as track twist, rail misalignment and angular bent at joints, are added to the test track, which are some of factors causing flange climb derailment. Some static wheel unloading is also set at the test vehicle's leading wheelset to induce flange climbing. We show that the derailment quotient data obtained through filter processing with some cutoff frequencies and the amount of wheel rise of the leading outer wheel have a similar tendency in time sequence, which indicates the usability of the filtered derailment quotient data for the assessment of flange climb derailment at low speed. Further, the cumulative value of the derailment quotient which is larger than the target maximum value is examined in order to evaluate the safety margin for derailment more precisely compared to the ordinary assessment by the derailment quotient only. As a result, we propose a new assessment quantity considering the cumulative value, and its target maximum value derived from the wheel rise and running distance. |
| first_indexed | 2024-04-11T08:13:15Z |
| format | Article |
| id | doaj.art-fcf3f0ee12be413393ee76a408e4fcbf |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:13:15Z |
| publishDate | 2018-08-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-fcf3f0ee12be413393ee76a408e4fcbf2022-12-22T04:35:16ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-08-018486618-0008118-0008110.1299/transjsme.18-00081transjsmeStudy on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel riseHisayo DOI0Hiroaki ISHIDA1Takefumi MIYAMOTO2Railway Technical Research InstituteDepartment of Mechanical Engineering, Meisei UniversityRailway Technical Research InstituteIn railways, on-track running tests are implemented to assess running safety against flange climb derailment. Results of tests depend on the frequency component of measured data. In this paper, the relationship between the measured data of the derailment quotient, which is the assessment quantity of derailment, and wheel rise are investigated. The data for the investigation are obtained in a flange climb running test at low speed on a test track, which includes two sharp curves with cants. Several types of track irregularities, such as track twist, rail misalignment and angular bent at joints, are added to the test track, which are some of factors causing flange climb derailment. Some static wheel unloading is also set at the test vehicle's leading wheelset to induce flange climbing. We show that the derailment quotient data obtained through filter processing with some cutoff frequencies and the amount of wheel rise of the leading outer wheel have a similar tendency in time sequence, which indicates the usability of the filtered derailment quotient data for the assessment of flange climb derailment at low speed. Further, the cumulative value of the derailment quotient which is larger than the target maximum value is examined in order to evaluate the safety margin for derailment more precisely compared to the ordinary assessment by the derailment quotient only. As a result, we propose a new assessment quantity considering the cumulative value, and its target maximum value derived from the wheel rise and running distance.https://www.jstage.jst.go.jp/article/transjsme/84/866/84_18-00081/_pdf/-char/enrailwayflange climb derailmentrunning safety assessmentderailment quotientwheel riserunning testlow speedsharp curvetrack irregurality |
| spellingShingle | Hisayo DOI Hiroaki ISHIDA Takefumi MIYAMOTO Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise Nihon Kikai Gakkai ronbunshu railway flange climb derailment running safety assessment derailment quotient wheel rise running test low speed sharp curve track irregurality |
| title | Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| title_full | Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| title_fullStr | Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| title_full_unstemmed | Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| title_short | Study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| title_sort | study on safety assessment of flange climb derailment at low speed based on the relationship between the derailment quotient and wheel rise |
| topic | railway flange climb derailment running safety assessment derailment quotient wheel rise running test low speed sharp curve track irregurality |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/866/84_18-00081/_pdf/-char/en |
| work_keys_str_mv | AT hisayodoi studyonsafetyassessmentofflangeclimbderailmentatlowspeedbasedontherelationshipbetweenthederailmentquotientandwheelrise AT hiroakiishida studyonsafetyassessmentofflangeclimbderailmentatlowspeedbasedontherelationshipbetweenthederailmentquotientandwheelrise AT takefumimiyamoto studyonsafetyassessmentofflangeclimbderailmentatlowspeedbasedontherelationshipbetweenthederailmentquotientandwheelrise |