A smart solution for improving ride comfort in high-speed railway vehicles

In the series of articles describing the aerodynamic phenomena caused by the passage of a train, the effects of a train running at high speed on itself, on other trains, on objects on the track and on people are characterized. This impact can be of two types – generated pressure and slipstream. Apart from the literature analysis, the author’s research is also taken into account. The second part presents the effect of pressure changes on the front and side surfaces of passing trains. Conclusions concerning side windows and windscreens in high-speed railway vehicles and older type railway vehicles with lower allowable speeds and the possibility of using various rolling stock on the same lines are presented. Keywords: rolling stock, high-speed railways, aerodynamic phenomena

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Analysis on the track quality evolution law of polyurethane-reinforced ballasted track in high-speed railway

Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail and Rapid Transit ◽

10.1177/0954409720975572 ◽

2020 ◽

pp. 095440972097557

Author(s):

Jie-Ling Xiao ◽

Pu Jing ◽

Si-Xin Yu ◽

Ping Wang

Keyword(s):

Standard Deviation ◽

Test Section ◽

High Speed ◽

Ride Comfort ◽

Normal Operation ◽

High Speed Railway ◽

Evolution Law ◽

Ballasted Track ◽

One Year ◽

Track Quality

Polyurethane-reinforced ballasted track (PRBT) can improve the integrity of ballasted track structures and satisfy the high-stability requirements of high-speed railways. In this study, the quality evolution law of PRBT structures after being launched into train service was analyzed, and a reference for structural optimization and maintenance operation was provided. The track geometric state of the PRBT test section of a high-speed railway was measured and monitored for nearly one year after it was launched into operation, and the ballastless track of the adjacent section was selected as a reference. The geometric states of the tracks were evaluated and compared using various parameters, including sliding standard deviation, average standard deviation, and track irregularity spectrum density. Results show that the track quality indexes of the test section, which were in operation for nearly one year, were slightly over the limit. Moreover, the fastener can be finely adjusted for the high-value index sections to further improve the ride comfort. The application effect of PRBT in the subgrade fracture zone was good, which could satisfy the requirements of high-quality transportation as well as the normal operation and maintenance of high-speed railway.

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A Design Method of Safety Equipment for High-Speed Railway Vehicles (Lateral Direction)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.72.309 ◽

2006 ◽

Vol 72 (714) ◽

pp. 309-315

Author(s):

Noriyuki SHIRAKUNI ◽

Shuichiro OTA ◽

Fumio MIYAZAKI

Keyword(s):

High Speed ◽

Design Method ◽

Safety Equipment ◽

Lateral Direction ◽

High Speed Railway ◽

Railway Vehicles

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3322 Analysis on Individual Differences in Seated Passengers' Vibrations in High Speed Railway Vehicles

The Proceedings of the Transportation and Logistics Conference ◽

10.1299/jsmetld.2012.21.75 ◽

2012 ◽

Vol 2012.21 (0) ◽

pp. 75-78

Author(s):

Hiroshi TANAKA ◽

Ryuzo HAYASHI ◽

Masao NAGAI ◽

Ryohei SHIMAMUNE ◽

Shinichi HASEGAWA ◽

...

Keyword(s):

Individual Differences ◽

High Speed ◽

High Speed Railway ◽

Railway Vehicles

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Model Predictive Control Application to Flexible-Bodied Railway Vehicles for Vibration Suppression

International Journal of Engineering Research in Africa ◽

10.4028/www.scientific.net/jera.10.25 ◽

2013 ◽

Vol 10 ◽

pp. 25-35

Author(s):

P.E. Orukpe

Keyword(s):

Model Predictive Control ◽

Predictive Control ◽

High Speed ◽

Ride Comfort ◽

The Body ◽

Ride Quality ◽

Linear Matrix ◽

Railway Vehicle ◽

Railway Vehicles ◽

Effective Manner

In this paper, we apply model predictive control (MPC) based on mixed H2/H to active vibration control of the flexibility of railway vehicle to improve ride quality. However, the flexibility in the body of high-speed railway vehicles creates difficulties which in practice may result in the body structure being heavier than what it is supposed to be. The use of active suspension helps to model the vehicle and its flexibility in an effective manner. Conventional control approaches are compared with linear matrix inequality MPC technique using flexible-bodied railway vehicle as an example. The result indicates that the MPC technique performs better in improving ride comfort compared to the passive and classical techniques when flexible modes are present.

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Evaluation of the Ride Comfort for High Speed Trains in Korea

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.321-323.1589 ◽

2006 ◽

Vol 321-323 ◽

pp. 1589-1592 ◽

Cited By ~ 2

Author(s):

Young Guk Kim ◽

Seog Won Kim ◽

Chan Kyoung Park ◽

Kyoung Ho Moon ◽

Tae Won Park

Keyword(s):

Statistical Method ◽

High Speed ◽

Ride Comfort ◽

Lateral Acceleration ◽

Railway Vehicles ◽

Longitudinal Acceleration ◽

High Speed Trains ◽

Term Evaluation

Evaluation of the ride comfort for railway vehicles can be divided into two classes; the long-term evaluation of ride comfort and the momentary evaluation of ride comfort. In the present paper, the ride comfort of railway vehicles are investigated for high speed trains in Korea. The long-term ride comfort has been analyzed by a statistical method and the momentary ride comfort has been analyzed by using the longitudinal acceleration, the jerk and the stationary lateral acceleration.

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