PSI - Issue 81

Juraj Gerlici et al. / Procedia Structural Integrity 81 (2026) 66–72

69

Fig. 4. A spatial model of the side wall cladding sheet.

The sheet is attached to the body frame by welding, i.e. the same as in the typical design. 4. Results and Discussion

The finite element analysis was carried out using SolidWorks Simulation as described by Koziar et al. (2018) and Pustiulha et al. (2018) to study the strength of the open wagon body, considering the proposed solutions. The calculation was carried out on the example of the open wagon model 12-757. When constructing the spatial model of the wagon, the covers of the unloading hatches were not considered. That is, the model includes structural elements that interact rigidly with each other. The finite element model of the body is formed by tetrahedra similarly to works by Gerlici et al (2024a), Gerlici et al (2024b) and Šťastniak et al. (2018) . It has 374,341 elements with 122,126 of nodes (Fig. 5). The maximum element size in the model was 100 mm, and the minimum was 20 mm.

Fig. 5. A spatial model of the side wall cladding sheet.

The strength calculation was carried out for the I and III design modes of the wagon. As an example, the design scheme of the open wagon body for the I design mode (impact) is given in Fig. 6. It was considered that the wagon body is subjected to a vertical load P v . The longitudinal force P p was applied to the rear stop of the automatic coupler, which was taken equal to 3.5 MN. On the other side of the body, the reaction to the action of the force P p was applied to the rear stop of the automatic coupler. Pressure caused by the cargo P p was applied to the side and end walls. Coal was considered as the transported cargo.

Fig. 6. A calculation diagram of the open wagon body.