Robustness Enhancement of a High Speed Railway Vehicle System Based on Uniform Design and Hooke-Jeeves Methods

This paper has proposed an optimization process with two phases to optimize suspension parameters of a high speed railway vehicle for advancing system’s robustness and performance. The vehicle’s nonlinear coupled differential equations of motion with fourteen degrees of freedom are created based on Kalker’s linear theory and the heuristic nonlinear creep model. The performance measure of the vehicle system is critical hunting speed, which is determined by Lyapunov’s indirect method. The first phase of optimization is to execute a set of experiments which is planned based on uniform design method. The second phase of optimization is to apply the Nelder-Mead Simplex method to exploit the best solution obtained in the first phase. Finally, the presented optimization process can effectively not only advance the performance of the vehicle system but also increase the performance’s robustness.

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Robust design of suspension parameters for high speed railway vehicle based on uniform design and kriging interpolation

International Journal of Advanced Mechatronic Systems ◽

10.1504/ijamechs.2011.043375 ◽

2011 ◽

Vol 3 (4) ◽

pp. 268 ◽

Cited By ~ 2

Author(s):

Yung Chang Cheng ◽

Cheng Kang Lee

Keyword(s):

Robust Design ◽

High Speed ◽

Uniform Design ◽

Kriging Interpolation ◽

Railway Vehicle ◽

High Speed Railway ◽

Suspension Parameters

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Vibration control and electromagnetic interference analysis of high-speed railway vehicle system with magneto-rheological damper

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209463 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 1439-1445

Author(s):

Xinna Ma ◽

Shaopu Yang ◽

Wenrui Shi

Keyword(s):

Electromagnetic Interference ◽

High Speed ◽

Ride Comfort ◽

Adaptive Fuzzy Control ◽

Mr Damper ◽

Railway Vehicle ◽

High Speed Railway ◽

Mr Dampers ◽

Vehicle System ◽

Magneto Rheological

With running speed increases, the dynamics characteristic of railway vehicle system behaves intensively, such as, snaking motion, bifurcation problem, even digression accident. These questions effect ride comfort and run stationary. The magneto-rheological (MR) damper can continually change its state in a few milliseconds and has low energy requirement and insensitivity to the temperature and circumstance. MR dampers have turned out to be a promising device in vibration control. According to the nonlinear of MR damper and the vibration characteristic of semi-active suspension of high-speed vehicle, a seventeen-degree-of-freedom lateral semi-control model of high-speed whole vehicle with MR dampers is established. Taking into account of the vibrations of vehicle and electromagnetic interference, a novel adaptive fuzzy control strategy is put forward. The simulation results show that adaptive fuzzy control method can improve the ride comfort and restrain electromagnetic interference. The electromagnetic interference noise problems in high-speed railway vehicle system with MRD are analyzed and discussed according to EN 55022 for the first time.

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Research on Bogie Frame Lateral Instability of High-Speed Railway Vehicle

Shock and Vibration ◽

10.1155/2018/8469143 ◽

2018 ◽

Vol 2018 ◽

pp. 1-13

Author(s):

Chen Wang ◽

Shihui Luo ◽

Ziqiang Xu ◽

Chang Gao ◽

Weihua Ma

Keyword(s):

High Speed ◽

Dynamics Simulation ◽

Lateral Acceleration ◽

Railway Vehicle ◽

Lateral Instability ◽

Bogie Frame ◽

High Speed Railway ◽

Long Time ◽

Line Test ◽

Equivalent Conicity

In order to find out the reason for the bogie frame instability alarm in the high-speed railway vehicle, the influence of wheel tread profile of the unstable vehicle was investigated. By means of wheel-rail contact analysis and dynamics simulation, the effect of tread wear on the bogie frame lateral stability was studied. The result indicates that the concave wear of tread is gradually aggravated with the increase of operation mileage; meanwhile the wheel-rail equivalent conicity also increases. For the rail which has not been grinded for a long time, the wear of gauge corner and wide-worn zone is relatively severe; the matching equivalent conicity is 0.31-0.4 between the worn rail and the concave-worn-tread wheel set. The equivalent conicity between the grinded rail and the concave-worn tread is below 0.25; the equivalent conicities are always below 0.1 between the reprofiled wheel set and various rails. The result of the line test indicates that the lateral acceleration of bogie frame corresponding to the worn wheel-rail can reach 8.5m/s2, and the acceleration after the grinding is reduced below 4.5m/s2. By dynamics simulation, it turns out that the unreasonable wheel-rail matching relationship is the major cause of the bogie frame lateral alarm. With the tread-concave wear being aggravated, the equivalent conicity of wheel-rail matching constantly increases, which leads to the bogie frame lateral instability and then the frame instability alarm.

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Modelling and evaluation of the hunting behaviour of a high-speed railway vehicle on curved track

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

10.1177/0954409718789531 ◽

2018 ◽

Vol 233 (2) ◽

pp. 220-236 ◽

Cited By ~ 3

Author(s):

Vivek Kumar ◽

Vikas Rastogi ◽

PM Pathak

Keyword(s):

High Speed ◽

Degrees Of Freedom ◽

Critical Speed ◽

Transportation Network ◽

Graph Model ◽

Railway Vehicle ◽

Physical Damage ◽

Creep Theory ◽

High Speed Railway ◽

Hunting Behaviour

Nowadays, rail transport is a very important part of the transportation network for any countries. The demand for high operational speed makes hunting a very common instability problem in railway vehicles. Hunting leads to discomfort and causes physical damage to carriage components, such as wheels, rails, etc. The causes of instability and derailment should be identified and eliminated at the designing stage of a train to ensure its safe operation. In most of the earlier studies on hunting behaviour, a simplified model with a lower degree of freedom were considered, which resulted in incorrect results in some instances. In this study, a complete bond graph model of a railway vehicle with 31 degrees of freedom is presented to determine the response of a high-speed railway vehicle. For this purpose, two wheel–rail contacts grounded on a flange contact and Kalker’s linear creep theory are implemented. The model is simulated to observe the effects of suspension elements on the vehicle’s critical hunting velocity. It is observed that the critical hunting speed is extremely sensitive to the primary longitudinal and lateral springs. Other primary and secondary springs and dampers also affect the critical speed to some extent. However, the critical hunting velocity is insensitive to vertical suspension elements for both the primary and secondary suspensions. Also, the critical speed is found to be inversely related to the conicity of the wheel.

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