Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load

It is known that the center pin of a car body strikes strongly against the lateral displacement stopper of the bogie when the vehicle vibrates widely in the case of earthquake motion with a predominant frequency of over 1.4 Hz. During such movement, and due to considerably large wheel/rail lateral f...

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Autores principales:	Daichi NAKAJIMA, Mitsugi SUZUKI, Yukio NISHIYAMA, Takefumi MIYAMOTO, Yasushi KAJITANI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	earthquake derailment bogie lateral displacement stopper crushable stopper shaking test Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/0d577529254d4cacacb6412ce8c569c8
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spelling	oai:doaj.org-article:0d577529254d4cacacb6412ce8c569c82021-11-26T07:00:24ZDevelopment of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load2187-974510.1299/mej.16-00454https://doaj.org/article/0d577529254d4cacacb6412ce8c569c82017-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/1/4_16-00454/_pdf/-char/enhttps://doaj.org/toc/2187-9745It is known that the center pin of a car body strikes strongly against the lateral displacement stopper of the bogie when the vehicle vibrates widely in the case of earthquake motion with a predominant frequency of over 1.4 Hz. During such movement, and due to considerably large wheel/rail lateral force and bogie rolling, etc., there is a risk of the wheel jumping to a height above the wheel flange, which in turn may result in derailment. It is thought that larger gap between the lateral displacement stopper and the center pin will improve running safety by buffering the strong impact against the lateral displacement stopper and because of a better vibration-damping effect of the lateral damper. Running safety effectively improves using a specially designed anti-seismic lateral damper which can provide large damping forces during a major earthquake. Accordingly, in this research, for the purpose of improving running safety in the case of an earthquake, a crushable lateral displacement stopper was developed with the same nominal gap from the center pin as currently used devices, in the normal condition, but which can expand in the case of a strong impact due to a large earthquake, in order to ensure vehicle running stability and quality. The crushable stopper is designed to be used together with a specially designed anti-seismic lateral damper. RTRI developed a mechanical crushable stopper with a mechanical fuse for the movable mechanism in order to expand gap in abnormal conditions, in such major earthquake. The seat of the lateral displacement stopper rubber gets displaced in the same direction as the expanding gap, if a predetermined load (a set moving load) acts on the stopper. Moreover, repeated loading test was carried out to confirm the influence of the repeated loading during usual operation.Daichi NAKAJIMAMitsugi SUZUKIYukio NISHIYAMATakefumi MIYAMOTOYasushi KAJITANIThe Japan Society of Mechanical Engineersarticleearthquakederailmentbogielateral displacement stoppercrushable stoppershaking testMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 1, Pp 16-00454-16-00454 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	earthquake derailment bogie lateral displacement stopper crushable stopper shaking test Mechanical engineering and machinery TJ1-1570
spellingShingle	earthquake derailment bogie lateral displacement stopper crushable stopper shaking test Mechanical engineering and machinery TJ1-1570 Daichi NAKAJIMA Mitsugi SUZUKI Yukio NISHIYAMA Takefumi MIYAMOTO Yasushi KAJITANI Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
description	It is known that the center pin of a car body strikes strongly against the lateral displacement stopper of the bogie when the vehicle vibrates widely in the case of earthquake motion with a predominant frequency of over 1.4 Hz. During such movement, and due to considerably large wheel/rail lateral force and bogie rolling, etc., there is a risk of the wheel jumping to a height above the wheel flange, which in turn may result in derailment. It is thought that larger gap between the lateral displacement stopper and the center pin will improve running safety by buffering the strong impact against the lateral displacement stopper and because of a better vibration-damping effect of the lateral damper. Running safety effectively improves using a specially designed anti-seismic lateral damper which can provide large damping forces during a major earthquake. Accordingly, in this research, for the purpose of improving running safety in the case of an earthquake, a crushable lateral displacement stopper was developed with the same nominal gap from the center pin as currently used devices, in the normal condition, but which can expand in the case of a strong impact due to a large earthquake, in order to ensure vehicle running stability and quality. The crushable stopper is designed to be used together with a specially designed anti-seismic lateral damper. RTRI developed a mechanical crushable stopper with a mechanical fuse for the movable mechanism in order to expand gap in abnormal conditions, in such major earthquake. The seat of the lateral displacement stopper rubber gets displaced in the same direction as the expanding gap, if a predetermined load (a set moving load) acts on the stopper. Moreover, repeated loading test was carried out to confirm the influence of the repeated loading during usual operation.
format	article
author	Daichi NAKAJIMA Mitsugi SUZUKI Yukio NISHIYAMA Takefumi MIYAMOTO Yasushi KAJITANI
author_facet	Daichi NAKAJIMA Mitsugi SUZUKI Yukio NISHIYAMA Takefumi MIYAMOTO Yasushi KAJITANI
author_sort	Daichi NAKAJIMA
title	Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
title_short	Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
title_full	Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
title_fullStr	Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
title_full_unstemmed	Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
title_sort	development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/0d577529254d4cacacb6412ce8c569c8
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Development of the lateral displacement crushable stopper, a part of bogie for countermeasures against derailment in case of earthquake and influence of repeated loading during usual run on moving load

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