Design and Simulation of Rail Vehicles

Spiryagin, Maksym; Cole, Colin; Sun, Yan Quan; McClanachan, Mitchell; Spiryagin, Valentyn; McSweeney, Tim

doi:10.1201/b17029

Cited by 105 publications

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“…These factors cause a 1.2-1.5 times decrease in total life of railcars (rail service car). In modern foreign patent and scientific literature the problems of increasing the reliability and strength of the frames, load-bearing body structure and components for rail vehicles during their design, operation and modernization are extensively studied [1,2]. We offer an analytical-numerical method based on the dynamic strength of the bearing body frame of emergency and repair rail service car, assuming a beam-type pattern of its fluctuations with elastic fixing of the ends under harmonic load as it moves along the track with periodic joint roughness.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model for Calculation of Oscillations in the Main Bearing Frame of Railcar with Changing Stiffness and Physical Parameters

Mukhamedova¹

2017

J. Sib. Fed. Univ. Eng. technol.

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Section: Introductionmentioning

confidence: 99%

Mathematical Model for Calculation of Oscillations in the Main Bearing Frame of Railcar with Changing Stiffness and Physical Parameters

Mukhamedova¹

2017

J. Sib. Fed. Univ. Eng. technol.

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“…In the last years, more lightweight carbodies have been developed with the purpose to reduce the axle-load and to increase the energetic performance of the vehicle. The mass reduction results in larger structural vibrations in the frequency range where the human body shows greater sensitivity [4,5]. For this reason, several models considering a flexible coach have been developed.…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of a Railway Vehicle for the Transport of People with Reduced Mobility

Bosso

Gugliotta

Zampieri

2018

Shock and Vibration

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One of the most important aspects of the design activity of passenger railway vehicles is the optimization of the comfort level that is often in contrast with other requirements, such as low weight, to reduce energy consumption, and high and flexible seating capacity. Due to the coach weight reduction, the car body structure becomes more susceptible to structural vibrations that affect the passenger comfort. In modern vehicles, seats are important elements to achieve the desired comfort, but in order to design and estimate the actual comfort level, the whole system must be considered, including the track excitations, a vehicle detailed dynamic model, and the coach and the seat flexibility. This paper describes a numerical model of a double-deck vehicle developed using a MB code that considers measured track irregularities, a detailed vehicle model, and a transfer function of the seat obtained by experimental tests on an optimized seat. In order to make the numerical model more realistic, the coach has been modeled as a flexible body to consider the effect of its natural frequencies. The work has been performed within the "CARITAS" project, whose aim is the design of a high comfort vehicle for people with reduced mobility.

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“…This requires modelling of the vehicle-track dynamical system, usually involving a multi-body system of masses, linkages and force elements [2,6,9,16]. The force elements include springs, dampers and similar components, but also -which is of great importance -the wheel-rail contact elements.…”

Section: Introductionmentioning

confidence: 99%

Calculation of locomotive traction force in transient rolling contact

Voltr

2017

ACM

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To represent the wheel-rail contact in numerical simulations of rail vehicles, simplified models (Fastsim, Polách etc.) are usually employed. These models are designed for steady rolling only, which is perfectly suitable in many cases. However, it is shown to be limiting for simulations at very low vehicle speeds, and therefore it does not actually allow simulation of vehicle running at arbitrarily variable speed. The simplified model of transient rolling, which involves calculation of the stress distribution in the discretised contact area, overcomes this disadvantage but might be unnecessarily complex for more simple simulations. In this paper, an approximative creep force computation method for transient rolling is presented. Its purpose is not to study the transient phenomena themselves but provide a simple and readily available way to prevent incorrect results of the numerical simulation when the vehicle speed approaches zero. The proper function of the proposed method is demonstrated by a simulation of start-up and interrupted sliding of a four-axle locomotive.

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Design and Simulation of Rail Vehicles

Cited by 105 publications

References 0 publications

Mathematical Model for Calculation of Oscillations in the Main Bearing Frame of Railcar with Changing Stiffness and Physical Parameters

Mathematical Model for Calculation of Oscillations in the Main Bearing Frame of Railcar with Changing Stiffness and Physical Parameters

Design and Simulation of a Railway Vehicle for the Transport of People with Reduced Mobility

Calculation of locomotive traction force in transient rolling contact

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