Study on the Influence of Gyroscopic Forces on High Speed Rail Vehicle Stability

Choosing a high-speed rail vehicle depends on many factors. On the one hand, there are requirements for ensuring the quality of service for passengers, on the other hand, there are constraints resulting from the parameters of available infrastructure. Also a relation of the benefit and financial costs associated with the purchase and the operation of rolling stock is essential. Technical characteristics of vehicles selected for operating a particular system is a compromise between the three groups of requirements. In this article technical parameters of railway infrastructure and rolling stock are classified and then analysed from the TSI requirements point of view.

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Aerodynamic Phenomena Caused by the Passage of a Train. Part 1: Pressure Interaction With Objects

Problemy Kolejnictwa - Railway Reports ◽

10.36137/1916e ◽

2021 ◽

Vol 65 (191) ◽

pp. 103-112

Author(s):

Andrzej Zbieć

Keyword(s):

High Speed ◽

Open Space ◽

Pressure Change ◽

Rolling Stock ◽

Wave Form ◽

Literature Analysis ◽

High Speed Rail ◽

Rail Vehicle ◽

Moving Train

The series of articles describing aerodynamic phenomena caused by train passage characterise the interaction of a train travelling at high speed with the moving train itself, on other trains, on trackside objects and on people. This interaction can be of two types – generated pressure and slipstream. Apart from the literature analysis, the author’s research was also taken into account. The first part presents the general classification of aerodynamic phenomena, the pressure change wave-form in open space caused by the passage of a train and the pressure interaction with trackside objects. Conclusions are presented on the construction of a high-speed rail vehicle and the strength and location of structures on high-speed lines. Keywords: rolling stock, high-speed railways, aerodynamic phenomena

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Stability of Elasto-Damper–Coupled Wheelset for High-Speed Rail Vehicles

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198196153100103 ◽

1996 ◽

Vol 1531 (1) ◽

pp. 20-26

Author(s):

Junghsen Lieh ◽

Jie Yin

Keyword(s):

High Speed ◽

Critical Speed ◽

Vehicle Stability ◽

Optimal Parameters ◽

High Speed Rail ◽

Stability Boundaries ◽

Vehicle Performance ◽

Suspension Parameters ◽

Rail Vehicles ◽

Stiffness And Damping

A symmetric wheelset with an elasto-damper coupling between the wheels is used to investigate the effect of coupling and primary stiffness and damping on the vehicle critical speed. Different suspension parameters are considered. Stability boundaries for various conditions are presented. The dynamic model of the elasto-damper–coupled wheelset is validated using published results. Both coupler and primary suspensions can dramatically affect the vehicle stability, and optimal parameters can be used to improve the vehicle performance over that of the conventional system.

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