Dynamics and optimization of a new double-axle flexible bogie for high-speed trains

Savos’kin, A. N.; Akishin, A. A.; Yurchenko, Daniil

doi:10.1177/0954409717737879

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Determination of the dynamic and strength characteristics of the new design cargo bogie is carried out in [3]. In this case, the cart consists of two auxiliary parts, connected by diagonal rods.…”

Section: Fig 1 Y25 Bogie Modelmentioning

confidence: 99%

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

et al. 2021

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To increase the efficiency of using railway transport, the possibility of using new designs of bogies, for example, Y25 under "wide gauge" wagons was considered. In order to substantiate the proposed solution, mathematical modeling of the dynamic loading of the hopper wagon Y25 bogies was carried out. A hopper wagon for the transportation of pellets and hot sinter model 20-9749 built by the State Enterprise "Ukrspetsvagon" (Ukraine) was chosen as a prototype. The simulation results showed that the use of Y25 bogies for hopper wagons allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 36 %. Other performance indicators are also significantly improved. The use of Y25 bogies for hopper wagons with actual parameters allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 28 %. The determination of the main indicators of the strength of the bearing structure of the hopper wagon Y25 bogie was carried out. The calculation was carried out in the SolidWorks Simulation software package (CosmosWorks), (France), which implements the finite element method. The calculations showed that the maximum equivalent stresses in the load-bearing structure of a hopper wagon with nominal parameters are 17 % lower than the stress acting in the load-bearing structure of a wagon on bogies 18–100 V of the load-bearing structure of a hopper wagon with actual parameters, the maximum equivalent stresses are 12 % lower per voltage in the load-bearing structure on bogies 18100. The conducted research will help to reduce the load on the load-bearing structures of hopper wagons in operation, improve the dynamics and strength indicators, as well as their service life

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Section: Fig 1 Y25 Bogie Modelmentioning

confidence: 99%

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

et al. 2021

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“…It is important to mention that such connections have found application in the designs of freight cars. For example, in bogies [5,6] or harnesses [7,8] of cars. However, it is expedient to consider the possibility of their use in the supporting structures of cars.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Dynamics and Strength of the Symmetrically Loaded Bearing Structure of a Tank Car with Friction Bonds Implemented by Means of Elastic Elements in the Tank Supports

et al. 2022

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The article reflects the results from determining the vertical loading of the supporting structure of the tank car. A feature of the tank car is the presence of friction bonds implemented by means of elastic elements in the boiler supports on the frame, which helps to reduce the loading of the supporting structure and increase the fatigue strength. To substantiate the proposed solution, the determination of the vertical loading of the supporting structure of the tank car was carried out when driving in an empty state by rail unevenness. It was established that the use of friction bonds implemented by means of bearings makes it possible to reduce the dynamic loading of the tank car by almost 35% compared to the prototype. To determine the distribution fields of acceleration acting on the supporting structure of the tank car, as well as their numerical values, a computer simulation of the dynamic loading of its supporting structure was carried out. The calculation was carried out using the finite element method according to the Mises criterion. When carrying out calculations, elastic connections were placed between the boiler and its supports using the options of the software package. To consider the friction component, the friction force was taken into account which was applied in the zones of the interaction of the boiler with the supports. The conducted studies showed that the discrepancy between the results of analytical and numerical modeling is 7.9%. It was established that the design service life of the improved supporting structure of the tank car is more than 20% higher than the service life of the prototype car. The safety factor of fatigue strength was 4.1. The research conducted can be used by those concerned about reducing failures in the bearing structures of tank cars in operational loading modes, decreasing maintenance costs, and developing recommendations for designing innovative car structures.

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“…The dynamics and optimization of a modern doubleaxle bogie are studied in [2]. A special feature of this bogie is its structure of two pieces connected by the diagonal rods.…”

Section: Introductionmentioning

confidence: 99%

“…6. Mathematical model (1)(2)(3)(4)(5)(6) was also used for determination of other dynamic characteristics of a boxcar with the nominal dimensions (Ta ble 3). The calculation was made for a car moving at a speed of 80 km per hour.…”

Section: Introductionmentioning

confidence: 99%

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

Fomin¹,

Lovska²

2020

Nauk. visn. nat. hirn. univ.

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Purpose. To determine the basic dynamic characteristics of a standard Ukrainian boxcar with the Y25 bogie by means of the mathematic modelling of dynamic loads in the vertical plane and to compare them with the dynamic characteristics obtained for a boxcar with the 18100 bogie. It can be used for substantiation of application of the Y25 bogie as more promising, which can improve the operational efficiency of rail transportation and foster integration of the Ukrainian transport system into the European transportation complex. Methodology. The authors used the mathematical modelling of a boxcar with the Y25 bogie. The research was made in the vertical plane. It was taken into account that an empty car passed over a joint irregularity. The research was made for an 11217boxcar as a predominant type to be used. The authors studied the motion of a car on the 18100 and Y25 bogies. The basic dynamic characteristics were determined for a boxcar with the nominal (design) dimensions of the carrying elements and a boxcar with the actual dimensions (after a long service life) on the basis of the field tests. The differential equations were solved by theRungeKutta method in MathCad software suite. The initial displacements and the speeds were taken equal to zero. The following dynamic characteristics of a boxcar were obtained: acceleration of the body in the center of mass, acceleration of the body in the areas of support on the bogies, forces in the spring suspension of the bogie, and dynamic coefficients of the bogies. Findings. The theoretical research showed that the basic dynamic characteristics of a boxcar with the nominal dimensions were improved by 3851% in comparison to a similar one with the 18100 bogie, and for a boxcar with the actual dimensions the dynamic characteristics were improved by 4350%. Originality. The authors substantiated the application of the Y25 bogie for a standard Ukrainian boxcar with the nominal and actual dimensions of the carrying elements by means of the mathematical modelling of the dynamic loads in the vertical plane. Practical value. Due to lower dynamic loads on the carrying structures of freight cars with the Y25 bogie, it is possible to improve the dynamic characteristics of the structures under the operational modes, to increase the fatigue strength and the operational resource, to decrease the total repair and maintenance costs, to ensure better security and reliability of freight transportation through lower loads on both carrying structures and lashing devices, to increase the speed of freight delivery thanks to better dynamic characteristics of cars, to improve the traffic security, and so on.

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Dynamics and optimization of a new double-axle flexible bogie for high-speed trains

Cited by 7 publications

References 7 publications

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

Analysis of the Dynamics and Strength of the Symmetrically Loaded Bearing Structure of a Tank Car with Friction Bonds Implemented by Means of Elastic Elements in the Tank Supports

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

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