Adapting the load-bearing structure of a gondola car for transporting high-temperature cargoes

The object of research is the processes of emergence, perception, and redistribution of loads in the supporting structure of a flatcar with a floor made of sandwich panels. To reduce the impact of dynamic loads on the supporting structure of a flatcar, as well as the safety of goods transported in it, it is proposed to manufacture floors from sandwich panels. Within the framework of the study, mathematical modeling of the dynamic load on a flatcar when it runs in a loaded state was carried out. It was found that, taking into account the proposed solution, the accelerations acting on the supporting structure of a flatcar are reduced by 8.4 % compared to the typical one. At the same time, accelerations acting on cargo placed on a flatbed car are reduced by 11.7 %. The results of calculating the strength of sandwich panels, when arranged on a flatcar, proved the feasibility of the proposed improvement. The main indicators of dynamics of the improved flatcar structure operated in an empty state were determined. It was established that the flatcar movement is assessed as "good". A feature of the results reported here is that the improved supporting structure of a flatcar contributes not only to reducing its dynamic load but also to improving the safety of transported cargoes. The scope of practical application of the results is the engineering industry, in particular, railroad transport. The condition for the practical application of the research results is the use of energy-absorbing material in the structure of sandwich panels. The study could contribute to devising recommendations regarding the design of modern structures of railroad vehicles and increasing the efficiency of the functioning of the transportation industry

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“…4) and strength was calculated. Graphic work was carried out in the software package SolidWorks [30,31].…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

Determining loading patterns in the bearing structure of a railroad flatcar with a floor made from sandwich panels

Lovska

Nerubatskyi

Окороков

et al. 2023

EEJET

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“…For this purpose, the lost SolidWorks Simulation complex [34][35][36][37][38], which implements the finite element method, is used.…”

Section: Engineeringmentioning

confidence: 99%

Studying the load of composite brake pads under high-temperature impact from the rolling surface of wheels

Panchenko,

Gerlici,

Vatulia

et al. 2023

Eureka: PE

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The object of the research is the processes of thermal stress, perception and redistribution of loads by the brake composite pad during braking of the car in operation. In the current conditions, wedge-dual wear of composite brake pads is observed in the braking systems of freight cars, the feature of which is the deterioration of the braking efficiency of freight trains. With this type of wear, both an increase in the load on the brake pad and an "underuse" of the amount of pressure on it can occur. A comprehensive thermal calculation was carried out for composite brake pads with uniform and wedge-dual wear. The results of the calculation showed that the amount of pressure on an abnormally worn pad is 23.3 % less than that acting on a pad with nominal values. It has been proven that the change in the pressure force on the composite pad with different values of the wear parameters during braking leads to a change in the braking force that occurs between the wheel and the rail during braking. The calculation of the strength of the composite brake pad with wedge-dual wear was carried out. The obtained results will make it possible to develop measures to modernize the elements of the brake lever transmission of freight cars. The field of practical use of the obtained results is car-building enterprises. The conditions for the practical use of the results are the brake lever transmissions of carriages of cars with a gauge of 1520 mm. The conducted studies prove the negative impact of wedge-dual wear not only on braking efficiency, but also on the strength of brake pads. This makes it necessary to create measures aimed at its elimination, which will contribute to increasing the level of train traffic safety and significantly reducing the operational costs of maintaining freight cars

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“…In order to determine the strength of the brake cylinder, its spatial model was built in the SolidWorks software package [18][19][20]. The strength calculation was performed using the finite element method in the SolidWorks Simulation software package [21][22][23].…”

Section: Engineeringmentioning

confidence: 99%

Influence of structural solutions of an improved brake cylinder of a freight car of railway transport on its load in operation

et al. 2022

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The object of research is the processes of occurrence, perception and redistribution of loads in the design of the car brake cylinder in operation. To compensate for angular shifts of the brake cylinder rod at its maximum exit from the housing, improvement measures are proposed. This improvement consists in the use of a safety element to limit the angular movements of the rod when leaving the body. The load of the brake cylinder rod during its angular displacements is determined. The condition for ensuring the strength of the rod is obtained. The optimal parameters of the pipe of the safety element (limiter) of the brake cylinder rod were determined by its allowable moment of resistance. For the possibility of moving the levers interacting with the stem, special windows are provided in the limiter. It is proposed to fix the limiter to the cover by welding. To determine the strength of the brake cylinder, a calculation was made using the finite element method. The results of a robust calculation showed that the maximum equivalent stresses occur in the brake cylinder cover and amount to 118.5 MPa. Therefore, the strength of the brake cylinder is ensured. A feature of the obtained results is that the proposed improvement can be applied not only at the stage of designing a brake cylinder, but also at the stage of modernization. The sphere of practical use of the obtained results is railway transport. The conditions for the practical use of the results are the absence of deformations of the brake cylinder rod. The research carried out will help to improve the efficiency of rolling stock brakes, ensure traffic safety, increase rolling stock speeds, deliver goods, etc. Also, the conducted research will contribute to the creation of developments to improve the reliability of the rolling stock brakes

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Adapting the load-bearing structure of a gondola car for transporting high-temperature cargoes

Cited by 9 publications

References 24 publications

Determining loading patterns in the bearing structure of a railroad flatcar with a floor made from sandwich panels

Determining loading patterns in the bearing structure of a railroad flatcar with a floor made from sandwich panels

Studying the load of composite brake pads under high-temperature impact from the rolling surface of wheels

Influence of structural solutions of an improved brake cylinder of a freight car of railway transport on its load in operation

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