The Study of Track Gauge Influence on Lateral Stability of 4-Axle Rail Vehicle Model

Dusza, M.

doi:10.5604/08669546.1146973

Cited by 10 publications

(20 citation statements)

References 26 publications

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“…They are the longitudinal stiffness in secondary suspension and wheel-rail coefficient of friction. The other factor, namely track gauge, was studied by the authors in [6,54]. So, the analysis from point of view of such influences as performed 2-axle vehicles (e.g.…”

Section: Resultsmentioning

confidence: 99%

Bifurcation analysis of 4-axle rail vehicle models in a curved track

Zboiński

Dusza

2017

Nonlinear Dyn

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The article presents authors' recent results on nonlinear lateral stability of rail vehicles in a curved track. The theories of self-exciting vibrations and bifurcation are the key elements here. The general objective is presentation of extended use of the earlier worked out authors' method to more complex rail vehicle models. Two 4-axle vehicle models were created. The first one represents coach MKIII described with multibody software by the first author. The second one represents coach 127A described with use of engineering multibody software VI-Rail. The models are described, and method of the analysis is shortly reminded. Then, results for both models are presented. They include verification of the limit cycle possible passage from straight track to circular curve and stability maps for regular curves of different radii and straight track. Next influence of selected suspension parameter and wheelrail coefficient of friction on vehicle stability is shown. The more general objective is the authors' say in the hot polemics on the advisability of rail vehicle stability analysis in curves and on the advantages of the nonlinear methods of such analysis over the linear ones.

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Section: Resultsmentioning

confidence: 99%

Bifurcation analysis of 4-axle rail vehicle models in a curved track

Zboiński

Dusza

2017

Nonlinear Dyn

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“…It is really hard task to find some serious number of the literature items by other researchers that treat the matter being studied in this paper directly [25][26][27][28]. One should realise of unquestionably smaller number of the results on dynamics of rail vehicles in TC even in publications generally referring to this problem as compared to similar results for ST and CC sections of railway track.…”

Section: Introductionmentioning

confidence: 97%

Investigation into nonlinear phenomena for various railway vehicles in transition curves at velocities close to critical one

Zboiński

Gołofit-Stawińska

2019

Nonlinear Dyn

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In this paper recent simulation results aimed at studying nonlinear phenomena that accompany motion of railway vehicle in transition curve at velocities around the vehicle critical velocity are presented by the authors. Such results concern six different objects representing railway vehicles. These are: three 2-axle railway bogies, two 2-axle railway cars, and 4-axle railway car. The paper attention is devoted to presenting as many different nonlinear behaviours of the studied objects as possible. This is done first of all to give an idea to the readers of great number of the nonlinear behaviour types that can appear for railway vehicles in transition curves at velocities lower and bigger than vehicle critical velocity. The differences arising from specificity of particular objects are highlighted while systematic variation of the system parameters in order to study influence of such variation on differences in the behaviour is less represented. The paper ends with the comprehensive comments by the authors to the results obtained.

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“…The area of steel wheel and rail contact is just about 1cm 2 . In the tiny contact zone the contact forces that carry the load and roll of the train are transmitted.…”

Section: Introductionmentioning

confidence: 99%

“…Some rail vehicle -track system parameters (e.g. the suspension parameter values, track gauge, rails inclination, profiles of wheels and rails wear and others) influence on rail vehicle model stability were tested [1,2,[13][14][15]. Now the researches focus on the wheel-rail coefficient of friction value.…”

Section: Introductionmentioning

confidence: 99%

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The wheel-rail contact friction influence on high speed vehicle model stability

Dusza¹

2017

Transport Problems

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Summary. Right estimating of the coefficient of friction between the wheel and rail is essential in modelling rail vehicle dynamics. Constant value of coefficient of friction is the typical assumption in theoretical studies. But it is obvious that in real circumstances a few factors may have significant influence on the rails surface condition and this way on the coefficient of friction value. For example the weather condition, the railway location etc. Influence of the coefficient of friction changes on high speed rail vehicle model dynamics is presented in this paper. Four axle rail vehicle model were built. The FASTSIM code is employed for calculation of the tangential contact forces between wheel and rail. One coefficient of friction value is adopted in the particular simulation process. To check the vehicle model properties under the influence of wheel-rail coefficient of friction changes, twenty four series of simulations were performed. For three curved tracks of radii R = 3000m, 6000m and  (straight track), the coefficient of friction was changed from 0.1 to 0.8. The results are presented in form of bifurcation diagrams.WPŁYW WSPÓŁCZYNNIKA TARCIA KOŁA-SZYNY NA STATECZNOŚĆ RUCHU MODELU POJAZDU SZYNOWEGO DUŻYCH PRĘDKOŚCI Streszczenie. Poprawne oszacowanie współczynnika tarcia w kontakcie kół z szynami jest kluczowym problemem w modelowaniu dynamiki pojazdu szynowego. W badaniach teoretycznych najczęściej przyjmuje się stałą wartość współczynnika tarcia. Jest rzeczą oczywistą, że w warunkach rzeczywistych kilka czynników może mieć znaczący wpływ na stan powierzchni tocznej szyn, a tym samym na wartość współczynnika tarcia, na przykład warunki pogodowe, położenie trasy kolejowej itp. W artykule przedstawiono wyniki badań wpływu zmian współczynnika tarcia na dynamikę modelu pojazdu szynowego. Utworzono model pojazdu czteroosiowego przeznaczonego do ruchu z dużymi prędkościami. Siły w kontakcie koła-szyny są obliczane przy użyciu procedury FASTSIM. Procedura ta przyjmuje jedną stałą wartość współczynnika tarcia w pojedynczej symulacji ruchu. Aby określić wpływ zmian wartości współczynnika tarcia na własności modelu, wykonano dwadzieścia cztery serie symulacji. Na trasach o trzech wartościach promienia łuku R = 3000 m, 6000 m i  (tor prosty) współczynnik tarcia zmieniano od 0,1 do 0,8. Wyniki przedstawiono w postaci wykresów bifurkacyjnych. 74M. Dusza

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The Study of Track Gauge Influence on Lateral Stability of 4-Axle Rail Vehicle Model

Cited by 10 publications

References 26 publications

Bifurcation analysis of 4-axle rail vehicle models in a curved track

Bifurcation analysis of 4-axle rail vehicle models in a curved track

Investigation into nonlinear phenomena for various railway vehicles in transition curves at velocities close to critical one

The wheel-rail contact friction influence on high speed vehicle model stability

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