Computing System for Solving Problems of Security and Stability of Railway Rolling Stock

Блохин, Е. П.; Железнов, К. И.; Урсуляк, Л. В.

doi:10.15802/stp2007/17457

STP

2007

DOI: 10.15802/stp2007/17457

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Computing System for Solving Problems of Security and Stability of Railway Rolling Stock

Е. П. Блохин

К. И. Железнов

Л. В. Урсуляк

Abstract: The description of the developed computer system possibilities and its use to solve problems of motion safety and stability is given.

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About the Evaluation of the Longitudinal Forces Level Effecting the Track Displacement at Transient Modes of Train Movement

Horоbets¹,

Masleieva²,

Урсуляк³

et al. 2015

STP

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Purpose. Study the transient modes effect of movement on the track displacement for the freight train safety control is supposed in this paper. For this it is necessary to investigate the longitudinal dynamics of a train on the track displacement. Simultaneously to assess the longitudinal forces level of a track and rolling stock interaction. Methodology. The level of the longitudinal forces, effecting the track displacement, was evaluated using mathematical modeling of longitudinal vibrations of the trains at transient modes of motion caused by braking. It was considered that each train vehicle consists of a body (solid) and the wheel sets, connected with the body by friction bearings (inelastic link). It was believed that during the movement of each train vehicle the vertical plane of its symmetry coincident with the vertical plane of symmetry of the assembled rails and sleepers. At simulation it was also supposed that in the process of translational motion of the vehicle body wheels make pure rolling along the rail without slipping on it. Findings. In the results of calculations the values of the longitudinal forces at different types of braking were obtained (it is regenerative braking and pneumatic one) under quasi-static and shock transients. For this various initial state of clearances in the inter-car connections up to beginning of transient was considered. The level of dynamic additives to longitudinal forces of interaction between wheel and rail that are substantially depending on vehicle accelerations was assessed. Originality. The transient regimes effect of trains movement caused by braking on the level of the longitudinal forces of track and rolling stock interaction was investigated. The longitudinal load of freight trains with regenerative and pneumatic braking was researched. The effect of the initial state of the train and different modes of braking on a dynamic additive to the longitudinal forces of the interaction between the track and rolling stock, which may effect the displacement of assembled rails and sleepers, was estimated. Practical value. The obtained results can be used to select rational modes of braking of freight trains, especially on lengthy down grade, from the positions prevent possible track displacement. Keywords: mathematical modeling; transient modes of train movement; pneumatic braking; recuperative braking; interaction forces between the track and rolling stock

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About the Evaluation of the Longitudinal Forces Level Effecting the Track Displacement at Transient Modes of Train Movement

Horоbets¹,

Masleieva²,

Урсуляк³

et al. 2015

STP

View full text Add to dashboard Cite

show abstract

The revised method for calculating of the optimal train control mode

Zhelieznov

Akulov

Zabolotniy

et al. 2019

AoT

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Development of a method for calculating the optimal mode of conducting a train in terms of energy saving meet the safety requirements and schedules. The method of calculation must solve the assigned tasks without significant time spent on the calculation. To implement this method of calculation was used a simplified model of the train as a controlled system. The existing mathematical and algorithmic methods for solving isoperimetric problems of finding the optimal solution in the presence of restrictions on resources were the information base for methodology development. Scientific works of domestic and foreign scientists, professional periodicals, materials of scientific and practical conferences, methodical and normative materials, currently in force on Ukrainian Railways. The results of these studies were used to create simulators on the basis of computer technology for the training of locomotive drivers. The scientific novelty of the proposed calculation method consists in applying the simplified calculations of the status of the train as a controlled system, without the use of differential equations of motion that allows to significantly increase the speed of the calculations. This, in turn, will solve the problems of finding optimal control in real time, taking into account changing conditions during the movement of the train. The practical significance of the obtained results is the use of such a calculation method that does not require significant time for its implementation and can be used as a subsystem of the on-board train control system capable of per-forming calculations taking into account changes in the current train situation.

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Computing System for Solving Problems of Security and Stability of Railway Rolling Stock

Abstract: The description of the developed computer system possibilities and its use to solve problems of motion safety and stability is given.

Cited by 2 publications

References 0 publications

About the Evaluation of the Longitudinal Forces Level Effecting the Track Displacement at Transient Modes of Train Movement

About the Evaluation of the Longitudinal Forces Level Effecting the Track Displacement at Transient Modes of Train Movement

The revised method for calculating of the optimal train control mode

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