Using an inerter-based suspension to improve both passenger comfort and track wear in railway vehicles

T.D. Lewis, J.Z. Jiang, S.A. Neild, C. Gong, Simon Iwnicki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

There is an increasing desire in the railway industry to improve the longevity of wheels and rails without reducing performance in other ways (e.g. worsening passenger comfort). One way of reducing track and wheel wear is to reduce the primary yaw stiffness, significantly diminishing the costs associated with maintenance and emergency repairs, resulting however in reduced passenger comfort and high-speed stability. This paper, using a two-axle railway vehicle case study, demonstrates the potential of using passive, inerter-based suspensions to concurrently improve ride comfort and reduce track wear. The industrial parameter T γ is used to quantify the frictional energy lost at the contact patch under curving conditions, and the lateral RMS carbody acceleration is used to quantify passenger comfort under straight running conditions, with lateral track disturbances taken from real track data. Optimisation results conclude that, with the default yaw stiffness value, compared with the default spring-damper configuration in the primary lateral suspension, employing beneficial inerter-based configurations can improve passenger comfort by up to 43%. If the yaw stiffness is reduced such that the track wear is improved, similar improvements in passenger comfort can still be achieved with lateral inerter-based suspensions; for example, an improvement of 33% can still be achieved with a 50% reduction in yaw stiffness. Furthermore, when an inerter-based lateral suspension is used together with a Hall-Bush longitudinal suspension, the passenger comfort rises to 40%, which relates to a 25% improvement when compared with a non-inerter lateral plus Hall-Bush longitudinal setup.

LanguageEnglish
Number of pages22
JournalVehicle System Dynamics
Early online date14 Mar 2019
DOIs
Publication statusE-pub ahead of print - 14 Mar 2019

Fingerprint

Stiffness
Wear of materials
Wheels
Axles
Rails
Repair
Costs
Industry

Cite this

@article{018935e5776a470eafd36472c60c8e62,
title = "Using an inerter-based suspension to improve both passenger comfort and track wear in railway vehicles",
abstract = "There is an increasing desire in the railway industry to improve the longevity of wheels and rails without reducing performance in other ways (e.g. worsening passenger comfort). One way of reducing track and wheel wear is to reduce the primary yaw stiffness, significantly diminishing the costs associated with maintenance and emergency repairs, resulting however in reduced passenger comfort and high-speed stability. This paper, using a two-axle railway vehicle case study, demonstrates the potential of using passive, inerter-based suspensions to concurrently improve ride comfort and reduce track wear. The industrial parameter T γ is used to quantify the frictional energy lost at the contact patch under curving conditions, and the lateral RMS carbody acceleration is used to quantify passenger comfort under straight running conditions, with lateral track disturbances taken from real track data. Optimisation results conclude that, with the default yaw stiffness value, compared with the default spring-damper configuration in the primary lateral suspension, employing beneficial inerter-based configurations can improve passenger comfort by up to 43{\%}. If the yaw stiffness is reduced such that the track wear is improved, similar improvements in passenger comfort can still be achieved with lateral inerter-based suspensions; for example, an improvement of 33{\%} can still be achieved with a 50{\%} reduction in yaw stiffness. Furthermore, when an inerter-based lateral suspension is used together with a Hall-Bush longitudinal suspension, the passenger comfort rises to 40{\%}, which relates to a 25{\%} improvement when compared with a non-inerter lateral plus Hall-Bush longitudinal setup.",
keywords = "Inerter, Suspension, Railway vehicle, Vibration, railway vehicle, vibration, suspension",
author = "T.D. Lewis and J.Z. Jiang and S.A. Neild and C. Gong and Simon Iwnicki",
year = "2019",
month = "3",
day = "14",
doi = "10.1080/00423114.2019.1589535",
language = "English",
journal = "Vehicle System Dynamics",
issn = "0042-3114",
publisher = "Taylor and Francis Ltd.",

}

Using an inerter-based suspension to improve both passenger comfort and track wear in railway vehicles. / Lewis, T.D.; Jiang, J.Z.; Neild, S.A.; Gong, C.; Iwnicki, Simon.

In: Vehicle System Dynamics, 14.03.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Using an inerter-based suspension to improve both passenger comfort and track wear in railway vehicles

AU - Lewis, T.D.

AU - Jiang, J.Z.

AU - Neild, S.A.

AU - Gong, C.

AU - Iwnicki, Simon

PY - 2019/3/14

Y1 - 2019/3/14

N2 - There is an increasing desire in the railway industry to improve the longevity of wheels and rails without reducing performance in other ways (e.g. worsening passenger comfort). One way of reducing track and wheel wear is to reduce the primary yaw stiffness, significantly diminishing the costs associated with maintenance and emergency repairs, resulting however in reduced passenger comfort and high-speed stability. This paper, using a two-axle railway vehicle case study, demonstrates the potential of using passive, inerter-based suspensions to concurrently improve ride comfort and reduce track wear. The industrial parameter T γ is used to quantify the frictional energy lost at the contact patch under curving conditions, and the lateral RMS carbody acceleration is used to quantify passenger comfort under straight running conditions, with lateral track disturbances taken from real track data. Optimisation results conclude that, with the default yaw stiffness value, compared with the default spring-damper configuration in the primary lateral suspension, employing beneficial inerter-based configurations can improve passenger comfort by up to 43%. If the yaw stiffness is reduced such that the track wear is improved, similar improvements in passenger comfort can still be achieved with lateral inerter-based suspensions; for example, an improvement of 33% can still be achieved with a 50% reduction in yaw stiffness. Furthermore, when an inerter-based lateral suspension is used together with a Hall-Bush longitudinal suspension, the passenger comfort rises to 40%, which relates to a 25% improvement when compared with a non-inerter lateral plus Hall-Bush longitudinal setup.

AB - There is an increasing desire in the railway industry to improve the longevity of wheels and rails without reducing performance in other ways (e.g. worsening passenger comfort). One way of reducing track and wheel wear is to reduce the primary yaw stiffness, significantly diminishing the costs associated with maintenance and emergency repairs, resulting however in reduced passenger comfort and high-speed stability. This paper, using a two-axle railway vehicle case study, demonstrates the potential of using passive, inerter-based suspensions to concurrently improve ride comfort and reduce track wear. The industrial parameter T γ is used to quantify the frictional energy lost at the contact patch under curving conditions, and the lateral RMS carbody acceleration is used to quantify passenger comfort under straight running conditions, with lateral track disturbances taken from real track data. Optimisation results conclude that, with the default yaw stiffness value, compared with the default spring-damper configuration in the primary lateral suspension, employing beneficial inerter-based configurations can improve passenger comfort by up to 43%. If the yaw stiffness is reduced such that the track wear is improved, similar improvements in passenger comfort can still be achieved with lateral inerter-based suspensions; for example, an improvement of 33% can still be achieved with a 50% reduction in yaw stiffness. Furthermore, when an inerter-based lateral suspension is used together with a Hall-Bush longitudinal suspension, the passenger comfort rises to 40%, which relates to a 25% improvement when compared with a non-inerter lateral plus Hall-Bush longitudinal setup.

KW - Inerter

KW - Suspension

KW - Railway vehicle

KW - Vibration

KW - railway vehicle

KW - vibration

KW - suspension

UR - http://www.scopus.com/inward/record.url?scp=85062993581&partnerID=8YFLogxK

U2 - 10.1080/00423114.2019.1589535

DO - 10.1080/00423114.2019.1589535

M3 - Article

JO - Vehicle System Dynamics

T2 - Vehicle System Dynamics

JF - Vehicle System Dynamics

SN - 0042-3114

ER -