Optimization of damping effect for the air spring by the frequency dependent orifice

This study proposes a newly developed structure for a frequency-dependent orifice for an air spring of a passenger train vehicle. This frequency-dependent orifice reduced both the rolling motion and the vertical vibration at high frequency. This paper also presents the numerical simulation results....

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Autores principales:	Yuichiro TAKINO, Hiroshi SHINMURA, Takeyosi MIHARA, Nobuyuki OKADA, Naohide KAMIKAWA, Koichiro NANBA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2017
Materias:	railway vehicle air spring frequency-dependent orifice ride comfort vibration control frequency characteristics Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/1ddc0c5e52fd434995b8c9d09f08d9d6
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spelling	oai:doaj.org-article:1ddc0c5e52fd434995b8c9d09f08d9d62021-11-26T07:00:24ZOptimization of damping effect for the air spring by the frequency dependent orifice2187-974510.1299/mej.16-00486https://doaj.org/article/1ddc0c5e52fd434995b8c9d09f08d9d62017-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/4/1/4_16-00486/_pdf/-char/enhttps://doaj.org/toc/2187-9745This study proposes a newly developed structure for a frequency-dependent orifice for an air spring of a passenger train vehicle. This frequency-dependent orifice reduced both the rolling motion and the vertical vibration at high frequency. This paper also presents the numerical simulation results. Optimal settings of the springs and dampers of the bogie are essential for reducing the uncomfortable carbody motion while the train is running. The air springs provide insulation and damping through air compressibility in the bellows and pressure loss of the airflow passing through an orifice installed between the air spring and the auxiliary reservoir. The frequency characteristics of a standard air spring show a peak at a frequency of ~1 Hz of the rolling motion of the carbody. A smaller orifice seems to be one of the solutions to change this characteristic. However, this method worsens the damping property at high frequency. To solve this problem, a frequency-dependent orifice with active vibration control technology has been proposed. This orifice improves the vertical vibration at low frequencies and the rolling motion of the carbody; however, it does not improve the properties at high frequencies. The results of our previous research left issues such as the need to improve the high-frequency response in a future study. The results of this study show that our newly developed frequency-dependent orifice effectively reduces the vertical vibration at high frequency with no external power supply. We are planning further simulations including realistic disturbance and a running test using a prototype of the frequency-dependent orifice.Yuichiro TAKINOHiroshi SHINMURATakeyosi MIHARANobuyuki OKADANaohide KAMIKAWAKoichiro NANBAThe Japan Society of Mechanical Engineersarticlerailway vehicleair springfrequency-dependent orificeride comfortvibration controlfrequency characteristicsMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 4, Iss 1, Pp 16-00486-16-00486 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	railway vehicle air spring frequency-dependent orifice ride comfort vibration control frequency characteristics Mechanical engineering and machinery TJ1-1570
spellingShingle	railway vehicle air spring frequency-dependent orifice ride comfort vibration control frequency characteristics Mechanical engineering and machinery TJ1-1570 Yuichiro TAKINO Hiroshi SHINMURA Takeyosi MIHARA Nobuyuki OKADA Naohide KAMIKAWA Koichiro NANBA Optimization of damping effect for the air spring by the frequency dependent orifice
description	This study proposes a newly developed structure for a frequency-dependent orifice for an air spring of a passenger train vehicle. This frequency-dependent orifice reduced both the rolling motion and the vertical vibration at high frequency. This paper also presents the numerical simulation results. Optimal settings of the springs and dampers of the bogie are essential for reducing the uncomfortable carbody motion while the train is running. The air springs provide insulation and damping through air compressibility in the bellows and pressure loss of the airflow passing through an orifice installed between the air spring and the auxiliary reservoir. The frequency characteristics of a standard air spring show a peak at a frequency of ~1 Hz of the rolling motion of the carbody. A smaller orifice seems to be one of the solutions to change this characteristic. However, this method worsens the damping property at high frequency. To solve this problem, a frequency-dependent orifice with active vibration control technology has been proposed. This orifice improves the vertical vibration at low frequencies and the rolling motion of the carbody; however, it does not improve the properties at high frequencies. The results of our previous research left issues such as the need to improve the high-frequency response in a future study. The results of this study show that our newly developed frequency-dependent orifice effectively reduces the vertical vibration at high frequency with no external power supply. We are planning further simulations including realistic disturbance and a running test using a prototype of the frequency-dependent orifice.
format	article
author	Yuichiro TAKINO Hiroshi SHINMURA Takeyosi MIHARA Nobuyuki OKADA Naohide KAMIKAWA Koichiro NANBA
author_facet	Yuichiro TAKINO Hiroshi SHINMURA Takeyosi MIHARA Nobuyuki OKADA Naohide KAMIKAWA Koichiro NANBA
author_sort	Yuichiro TAKINO
title	Optimization of damping effect for the air spring by the frequency dependent orifice
title_short	Optimization of damping effect for the air spring by the frequency dependent orifice
title_full	Optimization of damping effect for the air spring by the frequency dependent orifice
title_fullStr	Optimization of damping effect for the air spring by the frequency dependent orifice
title_full_unstemmed	Optimization of damping effect for the air spring by the frequency dependent orifice
title_sort	optimization of damping effect for the air spring by the frequency dependent orifice
publisher	The Japan Society of Mechanical Engineers
publishDate	2017
url	https://doaj.org/article/1ddc0c5e52fd434995b8c9d09f08d9d6
work_keys_str_mv	AT yuichirotakino optimizationofdampingeffectfortheairspringbythefrequencydependentorifice AT hiroshishinmura optimizationofdampingeffectfortheairspringbythefrequencydependentorifice AT takeyosimihara optimizationofdampingeffectfortheairspringbythefrequencydependentorifice AT nobuyukiokada optimizationofdampingeffectfortheairspringbythefrequencydependentorifice AT naohidekamikawa optimizationofdampingeffectfortheairspringbythefrequencydependentorifice AT koichironanba optimizationofdampingeffectfortheairspringbythefrequencydependentorifice
_version_	1718409704461303808

Optimization of damping effect for the air spring by the frequency dependent orifice

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