Substantiation of the Design Features of Sandwich Panels for Container Wall Lining

Purpose. The main purpose of this work is to substantiate the design features of sandwich panels for the manufacture of container walls of size 1SS. Methodology. To ensure the strength of the container walls, it is proposed to use sandwich panels as their components. This involves the manufacture of a sandwich panel from two metal sheets, between which a material with energy-absorbing properties is placed. This solution helps to improve the strength of the container by reducing its load. To determine the thickness of the panel sheet, the corresponding calculations were performed using the Bubnov-Galerkin method. It is taken into account that the sheet is a thin-walled plate subjected to an evenly distributed load. To improve the stiffness of the sheet, it is proposed to make it corrugated. The analysis of the corrugations has led to the conclusion that it is most appropriate to use corrugations with a rectangular configuration. Findings. The strength of the sandwich panel was calculated. The spatial model of the sandwich panel was created in the SolidWorks software package, and the strength calculation was performed in SolidWorks Simulation, which implements the finite element method. The calculations took into account the most unfavorable loading mode of the container during rail transportation - shunting impact. The calculation was performed on the example of the container's end wall, since it is the wall that is subjected to the highest loads in the event of a shunting collision with a platform car. The strength calculations showed that the maximum stresses in the sandwich panel made of corrugated sheets are about 258 MPa, which is 16% lower than the permissible stresses. The maximum displacements in the sandwich panel assemblies occur in its middle part and are equal to 3.1 mm. Originality. The design of the sandwich panels that form the end walls of the container is scientifically substantiated. The rational configuration of the corrugations of the sandwich panel sheets is determined. Practical value. The study will contribute to the development of recommendations for the design of modern modular-type vehicle structures and improve the efficiency of the transport industry

Optimization of the body strut of the grain hopper wagon

The article describes the optimization of vertical body struts of the bearing structure of the grain hopper wagon. The study included obtaining mathematical models using modern methods of the mathematical planning of the experiment. At the same time, the target function of the optimization was to reduce the material consumption for the strut. Based on the study conducted, it has been found that the mass of the strut, allowing for the optimization of its geometric parameters, is 4.3% lower than that of the existing structure. It should be noted that the optimization model proposed can also be used for selecting the optimal material for the strut, which may additionally reduce the material consumption of the hopper wagon body. The strength of the hoper wagon body with its optimized struts was calculated using the finite element method. The results of the calculation have shown that the strength indicators of the frame under the main operating loading conditions are within the permissible limits. The conducted research will contribute to the development of best practices for modern rail wagon designs with improved technical and economic characteristics