Justification of a Rational Design of the Pivot Center of the Open-top Wagon Frame by means of Computer Simulation

Antipin, Dmitriy; Racin, D.Yu; Shorokhov, S. G.

doi:10.1016/j.proeng.2016.06.738

Cited by 27 publications

(21 citation statements)

References 11 publications

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“…Peculiarities in the determination of the strength for the carrying structure of a wagon are studied in [ 14 ]. It deals with the reasons for defects in components of the wagon body.…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

et al. 2021

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The study deals with an application of aluminum foam as an energy-absorbing material for the carrying structure of a rail car. The material is particularly recommended for circular tube carrying structures. The authors conducted mathematical modeling of dynamic loads on the carrying structure of an open wagon that faces shunting impacts with consideration of the center sill filled with aluminum foam. It was established that the maximum accelerations on the carrying structure of an open wagon were 35.7 m/s2, which was 3.5% lower in comparison with those for a circular tube structure without a filler. The results obtained were proved by computer modeling. The strength of the carrying structure of an open wagon was also calculated. It was established that aluminum foam applied as a filler for the center sill decreased the maximum equivalent stresses in the carrying structure of an open wagon by about 5% and displacements by 12% in comparison with those involving the circular tube carrying structure of an open wagon without a filler. The natural frequencies and the oscillation modes of the carrying structure of an open wagon were defined. The designed models of the dynamic loading of the carrying structure of an open wagon were verified with an F-test.

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“…Peculiarities in the determination of the strength for the carrying structure of a wagon are studied in [ 14 ]. It deals with the reasons for defects in components of the wagon body.…”

Section: Analysis Of Recent Research and Publicationsmentioning

confidence: 99%

Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

et al. 2021

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“…The study of the strength of the load-bearing structure of a railroad gondola is reported in [3]. The authors provide the results from determining the fatigue durability of a welded body structure.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Justification of the use of square pipes in the frame of the removable roof of the open wagon

Fomin

Lovska

2021

EEJET

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This paper reports determining the basic strength indicators for the removable roof of a railroad gondola. It has been established that the typical roof design has a significant margin of safety in the components of the supporting structure. In order to reduce the roof material intensity, the reserves of its strength have been determined and optimized based on the criterion for minimal material intensity. Pipes of square cross-section have been proposed for using as the components of the roof frame. When taking into consideration the proposed measures, it becomes possible to reduce the mass of the frame of the removable roof for a railroad gondola by almost 15 % compared to the typical design. At the same time, to apply the roof on different types of gondolas, its cantilevered parts can move in a longitudinal plane. It is possible to use deflectors on the removable roof. The roof can be attached to the body in a regular way. It is also possible to fix it using shog-connections. To substantiate the proposed solution, the strength of the improved structure of the removable roof was determined. It was established that the maximum equivalent stresses in the load-bearing structure of the removable roof did not exceed permissible ones. To define the indicators of removable roof dynamics, its dynamic loading was investigated. The calculation was performed in a flat coordinate system. The oscillations in bouncing and galloping were taken into consideration as the most common types of a railroad car oscillations when running on a rail track. The mathematical model of dynamic loading was solved in the Mathcad software package (Boston, USA). The study has shown that the acceleration of the body in the center of masses is 0.4 g and is within the permissible limits. At the same time, the ride of a railroad car is excellent. The study reported here would contribute to the improvement of the efficiency of railroad transportation.

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“…The bearing structure of the freight car frame was improved in paper [11] to ensure strength under operational modes. The authors described features in calculating the strength of the improved load-bearing structure of the freight car with the help of computer simulation.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Defining patterns in the dynamic load and strength of the bearing structure of a covered freight car with a filler in the girder beam

Panchenko

Fomin

Vatulia

et al. 2021

EEJET

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This paper reports a study into determining the dynamic load and strength of the bearing structure of a covered freight car under operational modes. A feature of the freight car's bearing structure is that the girder beam has a closed cross-section. To reduce the dynamic load of the frame, the girder beam is filled with a material with viscoelastic properties. Such a solution could contribute to the transformation of the kinetic energy of impact (due to jerk, stretching, compression) into work of viscoelastic friction forces, and, consequently, to reducing the load on the bearing structure. To substantiate the proposed improvement, the dynamic load on the bearing structure of a covered freight car was mathematically modeled. The calculation was performed for the case of joint impacts at shunting. The study was carried out in a flat coordinate system. It was established that the maximum accelerations acting on the bearing structure of a covered freight car were about 37 m/s2. The calculated acceleration value is 3.2 % lower than that obtained for the bearing structure of a covered freight car without filler. The results of calculating the strength of the load-bearing structure of a covered freight car are given. In this case, a finite-element method was applied. The maximum equivalent stresses occur in the zones of interaction between the girder beam and the pivot beams, and amount to 319.5 MPa, which is 8 % lower than permissible. The calculation was also performed regarding other operational modes of loading the freight car's bearing structure. The model of the dynamic load on the bearing structure of a covered freight car was verified according to the F-criterion. The research reported here could contribute to designing innovative rolling stock structures, thereby improving the efficiency of their operation.

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Justification of a Rational Design of the Pivot Center of the Open-top Wagon Frame by means of Computer Simulation

Cited by 27 publications

References 11 publications

Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

Justification of the use of square pipes in the frame of the removable roof of the open wagon

Defining patterns in the dynamic load and strength of the bearing structure of a covered freight car with a filler in the girder beam

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