Investigating the effect of the equivalent conicity function's nonlinearity on the dynamic behaviour of a rail vehicle under typical service conditions

Kulkarni, Rohan; Qazizadeh, Alireza; Berg, Mats; Dirks, Babette; Persson, Ingemar

doi:10.1080/00423114.2021.1962537

Cited by 18 publications

(4 citation statements)

References 7 publications

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“…Finding an optimal solution should also consider the timetable, passenger comfort, traffic conditions on the route, and the durability and reliability of rail vehicles. This analysis serves as a starting point for further work on the energy efficiency of electrified rail transport, aiming to develop an energy optimisation algorithm [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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The Safety, Operation, and Energy Efficiency of Rail Vehicles—A Case Study for Poland

Sitarz

2024

Energies

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The objective of the article was to describe the importance of a good technically and economically planned process for purchasing a rail vehicle. Compliance with this process with safety standards and energy efficiency is crucial regarding effectiveness in the long-life cycle cost of a rail vehicle. Methods that were used focused on audit and document analysis. In the result based on a specific audit of a railway company, some non-compliances were found, and it was methodically proven that they are significant risk factors in terms of performing such processes in the future. Major conclusions regarded the importance of fulfilling legal requirements of SMS for purchase purposes, involvement of a safety engineer post in this process, and usage of technical feedback regarding previous operation of railway vehicles and operational findings from the past. The transport policy of the EU and other developed countries sets ambitious goals for reducing energy consumption in transportation activities, which is linked to the aim of reducing environmental burdens.

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Section: Introductionmentioning

confidence: 99%

“…Keeping in mind the long-life cycle of railway vehicles, it is of the utmost importance that individuals in charge of this process possess proper knowledge and base their decisions on precise factors [8][9][10].…”

mentioning

confidence: 99%

The Safety, Operation, and Energy Efficiency of Rail Vehicles—A Case Study for Poland

Sitarz

2024

Energies

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“…Finally, the results suggested that the wheel re-profiling distance of the high-speed trains should be controlled between 160,000 km and 200,000 km. Kulkarni et al 10 used the NP value to study the measured rail profile and wheel profile matching in different zones. The NP value of 3 mm must be considered in track maintenance.…”

Section: Introductionmentioning

confidence: 99%

Experimental and simulation study on the effect of different wheel profiles on the dynamics and wheel wear of high-speed trains

Wang

Dai

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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The wheel profile has a significant impact on the dynamics and operation economy of high-speed trains (HST). To study the effect of different wheel profiles on the operating performance of the HST. This paper proposed a combination method of experimental and simulation to study the performance of different profiles. A certain type of X-type HST with different wheel profiles S1002CN, LMB10 and XP55 to study the operating performance of the HST were investigated. A dynamic model of HST and a Jendel wear model were also developed to study the dynamics and wear characteristics of the HST. The experimental results found that the wheel re-profiling mileage of the three types of wheel profiles were 112,000 km, 140,000 km and 211,000 km, respectively. Therefore, the XP55 wheel profile was the optimum profile and the S1002CN wheel profile was the worst profile when matched with the X-type HST. The bogie hunting frequency of three wheel profiles before wheel re-profiling was 8.3 Hz, 8.5 Hz and 6.8 Hz, respectively. The vehicle dynamics performance of the XP55 profile is the best and the S1002CN profile is the worst, and wheel wear prediction results showed that XP55 had the smallest wear depth. The article provides a basis for the selection of wheel profiles for HST.

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“…9,10 Polach’s approach showed that the nonlinearity of the equivalent conicity had the most effect on the bifurcation, whether it was subcritical or supercritical. 11,12 Kulkarni et al 13 examine the effect of track maintenance on vehicle dynamics as supported by the nonlinearity parameter and the equivalent conicity at 3 mm on Swedish Railway. Li et al 14 studied the effect of track parameters on wheel–rail contact and carbody hunting stability.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

Hou

Yang

Chen

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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Small changes to wheel-rail profiles can have a significant impact on the equivalent conicity and vehicle dynamics. Previous research has focused mostly on worn wheels, however, with little attention to different types of rail profile deviation and their influences on vehicle dynamics. Therefore, the specific objective of this paper is to investigate the individual and combined influences of various rail profiles and multi-parameter couplings on the hunting instability of railway vehicles. This paper first obtains the distribution law of rail profile deviation from a statistical analysis of several rail profiles with long-term measurements. Then, the equivalent conicity of rail profiles that match the studied wheel profiles, gauges and wheelback distances is compared. The dynamic model for the vehicle has been established. Finally, the measured rail profiles and wheel profiles, as well as the combinations of the gauges, wheelback distances, friction coefficients and key suspension characteristics are integrated into the simulation model to analyze the atypical phenomenon of the carbody hunting and the bogie hunting. According to the findings, rail profile deviation has a significant impact on equivalent conicity and the evaluation of vehicle stability when subjected to multi-parameter coupling, particularly for worn wheels. Therefore, strict limits of rail profile deviation have to be considered in track maintenance for vehicles running at speeds of 300 km/h or higher.

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Investigating the effect of the equivalent conicity function's nonlinearity on the dynamic behaviour of a rail vehicle under typical service conditions

Cited by 18 publications

References 7 publications

The Safety, Operation, and Energy Efficiency of Rail Vehicles—A Case Study for Poland

The Safety, Operation, and Energy Efficiency of Rail Vehicles—A Case Study for Poland

Experimental and simulation study on the effect of different wheel profiles on the dynamics and wheel wear of high-speed trains

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

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