Comparative analysis of the parameters of the strength of the subgrade at the transition to the higher axial loading up to 25 t

Radkevych, A. V.; Петренко, В. Д.; Tiutkіn, O. L.; Andrieiev, V. S.; Мухина, Н. А.

doi:10.1088/1757-899x/708/1/012024

Cited by 3 publications

(3 citation statements)

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“…The research was a modal analysis for the following combination of the studied parameters: 1) loading level of the bunker container -1/4, 1/2, 3/4 of the container volume and its full loading; 2) strength level of steel -grades C255, C345 and C440. Modelling of the bulk material was performed by applying pressure to the inner surface of the bunker structure, which was interpreted as the application of additional masses using a specially developed technology [15]. In addition, some developments in the field of transport, presented in works [16][17][18] and in the field of seismic resistance of building structures according to works [19,20] were used.…”

Section: Methodsmentioning

confidence: 99%

Controlling the dynamic characteristics of steel bunker containers for bulk materials

Bannikov,

Tiutkin,

Hezentsvei

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents the main results of research devoted to the definition and analysis of the dynamic characteristics of steel small-sized bunker containers for storing bulk materials. All studies were carried out using the finite element method with the use computer complex SCAD. The object of research was a bunker of a bypass track for feeding bulk materials with a total volume of up to 70 m3. The study analysed the natural partial frequency spectrum and the partial oscillation modes of individual load-bearing elements of the bunker. Based on the results of the data analysis, a rather high quantitative density of the natural frequency spectrum was determined. At the same time, its lower limit is about 25-30 Hz for an empty bunker capacity and decreases to 3-5 Hz when the bunker is fully loaded, which is dangerous from the point of view of the possibility of resonance phenomena. In order to qualitatively and quantitatively control the dynamic characteristics, it was proposed to change the steel strength of the structure, which made it possible to change the natural frequencies by about 15% for every 100 MPa change in steel strength for the bunker containers of the considered type.

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Section: Methodsmentioning

confidence: 99%

Controlling the dynamic characteristics of steel bunker containers for bulk materials

Bannikov,

Tiutkin,

Hezentsvei

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Найчастіше її встановлюють за результатами випробувань, але іноді за результатами розрахунків. У будь-якому випадку визначають головним чином поперечні (бокові) сили взаємодії ходових частин екіпажу та колії, а також прискорення та переміщення частин екіпажу в горизонтальному поперечному і вертикальному напрямках [1,[6][7][8][9][10].…”

Section: методикаunclassified

Determination of the Stability of Freight Cars Taking Into Account the Railway Track Parameters

Швець¹

2020

STP

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Purpose. For prospective speed increase in the work is aimed to consider the complex conditions of the dynamic interaction of the railway track with rolling stock. The nature and level of this interaction depends both on the design of the unit of rolling stock, its state and speed, and on the design and condition of the track itself. Methodology. Evaluation of the possible rolling stock impact on the track was investigated by the analytical method. The track stress state was determined by calculation using dependencies between force factors and the characteristics of the stress-strain state of the track. When determining the static pressure of the wheel on the rail, the influence of rolling stock skews in the rail track according to the “herringbone” scheme is considered, in which the additional lateral effect of the wheel pairs of the bogies on the track structure is maximal. Findings. When conducting theoretical studies, the dependencies of the lift resistance coefficient by longitudinal forces were obtained taking into account various types of inertia forces on irregularities both on the wheel and on the rail thread. The values of the friction coefficient in the wheel-rail contact on the movement speed were also obtained. Originality. For the first time, the rules for calculating the railway track for strength and determining the dynamic loading of the rail carriage are combined. This improvement will make it possible to calculate the structural speed of the car based on the axial loads, inertia forces due to the wheel and rails` irregularities, and also take into account the longitudinal quasistatic forces arising in the train during braking modes. Practical value. Determination of the car lift resistance coefficient using the above methodology will allow a more thorough consideration and justification of the cause of wheelset derailment. The application of this calculation method will allow us to determine the strength of the railway track and the ballast layer, taking into account the uneven load of rail threads in the case of distortions of the freight rolling stock under the action of compressive quasistatic longitudinal forces.

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“…So, for example, work [7] makes the analysis of a modern condition of such researches. More often it is the finite element method (FEM) [8,9], in addition, it is the method of discrete elements [10], computed tomography [11], the process of elastic waves propagation [12,13], and others.…”

Section: Introductionmentioning

confidence: 99%

Research of the Reduced Mass of the Railway Track

Kurhan

Leibuk

2020

Acta Tech. Jaurinensis

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In an overall view, a vehicle is described as a system of bodies interconnected by elastic and dissipative couplings. Bodies have a mass concentrated at a point, the movement of which describes their motion. Certain difficulties arise when introducing a railway track into such models. While interacting with the rolling stock, the track operates as an elastic body, and its mass is specified as reduced to the point of interaction. The purpose of this work is to provide a reasonable value of the reduced mass of the railway track depending on its parameters. The task is solved by applying a spatial model of dynamic deformations of the railway track on the basis of the elasticity theory. Such an approach makes it possible to determine which part of the railway track interacts with the wheel based on the propagation of deformations as elastic waves.

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Comparative analysis of the parameters of the strength of the subgrade at the transition to the higher axial loading up to 25 t

Cited by 3 publications

References 1 publication

Controlling the dynamic characteristics of steel bunker containers for bulk materials

Controlling the dynamic characteristics of steel bunker containers for bulk materials

Determination of the Stability of Freight Cars Taking Into Account the Railway Track Parameters

Research of the Reduced Mass of the Railway Track

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