Analysis of the Stress-Strain State of Travel Pipes  With the Use of Hardware and Software Complex

Solonenko, V. G.; Tynyshpayev, Almaty Communications named after M.; Makhmetova, N. M.; Nikolaev, V. A.; Kvashnin, Mikhail; Bekzhanova, S. E.; Bondar, I. S.; Mirzabaev, S. A.

doi:10.32014/2020.2518-170x.22

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…When evaluating the data obtained in the process of experimental determination of the dynamic characteristics of the upper structure of the path, it is necessary to perform their multiparametric analysis. In addition to the amplitude-time dependences of vibration velocity, the amplitude-time dependences of displacements and accelerations, as well as the spectral densities of signals (amplitude-frequency characteristics) are of interest [21,22].…”

Section: Engineeringmentioning

confidence: 99%

Experimental determination of dynamic characteristics of a railway track

Zhangabylova

Bikhozhaeva²,

Kvashnin³

et al. 2023

Eureka: PE

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It is known a priori that vibrations that occur in the elements of the track structure during the passage of a train load are a superposition of free and forced mechanical vibrations. It has been established that the range of oscillation frequencies of the elements of the track superstructure includes oscillations with a frequency from tens to hundreds and thousands of hertz. However, the influence of vibrations on the track and their dependence, in turn, on the design of the track, has not been fully studied, which causes controversy between specialists in this matter. There is an opinion that in intermediate fastenings, the main role is played by an elastic gasket, which ensures the vertical rigidity of the rail-sleeper assembly. It has been experimentally established that in the frequency range below the frequency of free oscillations of rail fastenings, the force applied to the upper surface of the elastic gasket is transferred to the lower surface in an unchanged form. The article discusses the vibrations that occur in the elements of the upper structure of the track (rails, sleepers, rail fastenings, ballast base) during the passage of a moving load, which significantly affect the strength, and, consequently, the durability of both the elements themselves and the railway track generally. Vibrograms, oscillograms, accelerograms of rail oscillations and their spectra during the passage of TALGO are presented. At present, the VOSSLOH fastening, developed in Germany, has been widely used in the construction of tracks on high-speed railways of the Republic of Kazakhstan. In this regard, there is a need for a comprehensive study of the operation of this type of fastening under a train load

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Section: Engineeringmentioning

confidence: 99%

Experimental determination of dynamic characteristics of a railway track

Zhangabylova

Bikhozhaeva²,

Kvashnin³

et al. 2023

Eureka: PE

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“…The stress-strain state in the structural elements of reinforced concrete spans of railway overpasses under the action of its own weight and temporary loading based on experimental and numerical methods is investigated in this work [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The on bridges passing train loads conditions are set through comparing the superstructure elements classes determined according acting Guidelines for determining the carrying capacity of bridges [3][4][5] with the classes of rolling equipment to be passed through, given in [6]. These Guidelines are used in the maintenance and operation of railroad bridges on railroad lines.…”

Section: Introductionmentioning

confidence: 99%

Development of safety methods on artificial structures of railway lines

Akbayeva

Muratbekova

Altayeva

et al. 2022

EEJET

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The numerous cases of deformation of technogenic objects in the transport industry under increasing axial loads and speeds of motion aggravate the need to solve the problems of early recognition of the nature and causes of deformations of structural elements. The need for this is due to the fact that destructions and accidents, resulting from deformation processes, cause enormous economic, social and environmental damage, incomparable with the funds spent on protective measures. The object of the study in the article is a railway trestle, consisting of two spans of a ribbed reinforced concrete beam. Determination of the residual resource in terms of bearing capacity and load-carrying capacity of the railway trestle is the main task. The authors have obtained bending deformations (stresses), frequencies of natural vibrations and operating modes of structures of railway trestle spans. The damage degree of the railway overpass spans structures may also be judged by the deviation of the calculated values of the amplitude-phase-frequency characteristics (AFFR) from the standard values. The peculiarity of this research is the fact, that the natural frequencies of railway overpass vibrations are determined either by «tails» of experimental vibrograms (oscillograms) after the load release from the span structure. During the express-diagnostics of railway overpasses, the relative deformations (stresses) of girder spans in the middle of the span, the first frequency (period) of natural vibrations of girder reinforced concrete spans of railway overpasses are used as parameters characterizing the technical condition of the spans. The results of tests and examinations of overpasses to ensure their safe operation have been given

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“…The former characterizes the smooth running of the car, and the latter the stability of the wheel, i.e. wheel derailment [7]. It is known that the magnitude of the acceleration at different points along the length of the car is not the same, since the vertical vibrations of galloping of the body contribute to the value of the vertical acceleration of bouncing.…”

Section: Modeling the Influence Of The Article Device On Dynamic Indimentioning

confidence: 99%

Modeling the Influence of the Article Device on Dynamic Indicators of Freight Wagons

Solonenko¹,

Tynyshpaev²,

Makhmetova³

et al. 2020

SERIES OF GEOLOGY AND TECHNICAL SCIENCES

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The article investigates the dynamic performance of a freight car with an articulation device - model SAC-1 RUS. As a criterion for assessing dynamic indicators, the acceleration of the car body and the dynamic deflections of the "spring-truck" system were selected, which characterize the ride and loss of stability of the car when it goes off the rails on various irregularities of the track. When an articulated car moves along different path irregularities, the acceleration that occurs at various points along the length of the car is not the same. In compiling the system of differential equations of motion of the "spring - truck" system, the Lagrange equation of the second kind was used as the mathematical apparatus. The body acceleration and the dynamic deflections of the springs were chosen as the criteria for assessing the running properties of the cars. The first characterizes the smoothness of the carriage, and the second characterizes the stability of the wheel, i.e. wheel derailment. It is known that the magnitude of the acceleration at different points along the length of the car is not the same, since the value of the vertical acceleration of bouncing is influenced by the vertical oscillations of the body's galloping. Therefore, when solving the system of differential equations, the body accelerations were determined at two points: above the center plates of the bogies and the center plate of the device for articulating freight cars or above the wheelsets, that is, in the places where acceleration sensors are installed during full-scale tests of cars. Based on the analysis of the results obtained, it was revealed that articulated cars: exclude the possibility of relative vertical displacements of adjacent cars, with other equal dynamic parameters; lead to a noticeable deterioration in driving properties, accompanied by an increase in the value of vertical acceleration of the body. The values of accelerations and dynamic deflections of an articulated car are 6% higher than those of a four-axle freight car. The vertical acceleration of the front and rear of an articulated car is 30% greater than that of a typical car. Outside the critical speed for an articulated car, the value of vertical dynamic deflections significantly decreases in the case of an isolated irregularity with a length of 6 m or less.

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Analysis of the Stress-Strain State of Travel Pipes With the Use of Hardware and Software Complex

Cited by 7 publications

References 1 publication

Experimental determination of dynamic characteristics of a railway track

Experimental determination of dynamic characteristics of a railway track

Development of safety methods on artificial structures of railway lines

Modeling the Influence of the Article Device on Dynamic Indicators of Freight Wagons

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