Assessment of dynamic efforts to bodies of wagons at transportation with railway ferries

The object of this study is the processes of emergence, perception, and redistribution of loads in the supporting structure of a 1CC size container with end walls made of sandwich panels. To reduce the longitudinal load of the container under operational modes, the introduction of sandwich panels into its design is proposed. This solution is implemented on the example of its end walls as the most loaded component of the body in operation. The thickness of the sandwich panel sheet was determined, provided that the strength in operation is ensured. Mathematical modeling of dynamic load of a container with end walls made of sandwich panels placed on a platform car during shunting co-impact was carried out. It was established that taking into account the proposed improvement makes it possible to reduce the dynamic loads that the container perceives by 10 % compared to the typical structure. The results were confirmed by computer simulation of the dynamic load of the container. The models formed within the framework of the study were verified according to the F-criterion. The results of calculations for the strength of the container showed that the stresses in its structure are 15 % lower than those in the typical one. A feature of the findings is that the proposed improvement of the container helps improve its strength in operation by reducing the loads acting on it. The scope of practical use of the results is the engineering industry, namely, railroad transport. At the same time, the conditions for the practical application of the research results are the introduction of energy-absorbing material as a component of the sandwich panel. This study will contribute to devising recommendations for designing modern structures of vehicles of a modular type and for improving the efficiency of the transport industry

Section: The Study Materials and Methodsmentioning

confidence: 99%

Revealing the effect of structural components made of sandwich panels on loading the container transported by railroad

Vatulia

Lovska

Myamlin

et al. 2023

“…The solution of the mathematical model was carried out in the Mathcad software package (USA) [15][16][17] using the Runge-Kutta method [18][19][20][21]. This method was chosen as a calculation method due to the fact that it allows obtaining sufficient accuracy in theoretical calculations.…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

Detecting the effect of an intermediate adapter on the load of the bearing structure of an open wagon

Lovska,

Dižo,

Prokopovych

et al. 2023

The object of the research is the processes of occurrence, perception, and redistribution of loads in the load-bearing structure of an open wagon body, taking into account the use of an intermediate adapter. To reduce the vertical dynamic loads acting on the supporting structure of the railroad car, it is suggested to use an intermediate adapter between the frame and the load. The dynamic load of the supporting structure of the open wagon was modeled, taking into account the use of an intermediate adapter. The research was carried out in the vertical plane during the oscillations of the bouncing of the car. The results of the calculations showed that the acceleration acting in the center of mass of the supporting structure of the open wagon is 4.2 % lower than that acting on the supporting structure of the open wagon without using an adapter. The obtained acceleration results are taken into account when determining the strength of the supporting structure of the open wagon. It was established that the use of an intermediate adapter contributes to the reduction of stresses in the supporting structure of the open wagon by 6 % compared to the typical scheme of cargo transportation. A feature of the results is that the proposed solution to reduce the dynamic load of the supporting structure of the car can be implemented without improving its design. The field of practical use of the results is the engineering industry, in particular, railroad transport. The conditions for the practical use of the research results are the placement of the adapter over the entire floor area of the car body. The research will contribute to devising recommendations on reducing the load on the load-bearing structures of cars, the costs of their unplanned repairs, and to increasing the efficiency of railroad transport operation

“…This method is implemented in the Solid-Works Simulation software package (France). The CAD model of the gondola car body was built in SolidWorks (France) [15][16][17] according to the album of drawings of a typical design. When building the model, it was taken into account that the The mathematical model, which characterizes the movement of a gondola car in a vertical plane, takes the following form:…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

Determining the load on a body of the gondola car with unloading hoppers under the basic operating modes

Lovska,

Stanovska,

Nerubatskyi

et al. 2023

The object of research is the processes of occurrence, perception, and redistribution of loads in the supporting structure of a gondola car with unloading hoppers. In order to increase the carrying capacity of the gondola car, and accordingly the profitability of railroad transportation, it has been proposed to improve its structure. This improvement implies the installation of unloading hoppers in its middle part. According to preliminary calculations, the use of unloading hoppers could increase the usable volume of the body by 2.82 m3. At the same time, the carrying capacity of the car would increase by 3.8 tons. Accordingly, the axial load on the wheelsets would increase. It is possible to solve this issue by using wheelsets with increased axial load in bogies. As part of the research, a mathematical modeling of the vertical dynamics of the gondola car during its movement in the empty and loaded states of the rail track was carried out. It was established that the movement of the car is evaluated as "excellent". The calculation of the strength of the gondola car body under the main operational load modes was carried out. The stability of the car's equilibrium was determined, and its modal analysis was also carried out. The peculiarity of the results within the framework of the study is that the proposed improvement could be implemented not only when designing a new car structure but also during modernization. The area of practical application of the results is the machine-building industry, in particular, railroad transport. The conditions for the practical application of the research results are compliance with the axial load within the permissible values. The research reported here will contribute to improving the technical and economic indicators of cars, as well as increasing the profitability of railroad transportation