PSI - Issue 81

Ján Dižo et al. / Procedia Structural Integrity 81 (2026) 11 – 17

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Fig. 6. Acceleration acting on a flat wagon with containers.

a)

b)

Fig. 7. a) A scheme of fastening the unloading hatch cover; b) A finite element model of the unloading hatch cover.

Fig. 8. The most stressed areas of the hatch cover.

3. Results and Discussion Based on the calculations, the main indicators of the strength of the unloading hatch cover were determined. It was established that the maximum stresses occur in the hinges (Fig. 9) and are equal to 187 MPa (Fig. 10), which is 11% lower than the permissible ones. The maximum displacements in the nodes of the unloading hatch cover occur in the locking brackets and are equal to about 1.8 mm (Fig. 11).

a)

b)

Fig. 9. Distribution of stresses in the analyzed hatch cover structure: a) a view 1; b) a view 2.

The limitation of this study is that the formed model of the unloading hatch cover does not take into account welding seams. That is, such a container design is universal. Loading of cargo that cannot be loaded through hatches located in the roof can occur through the end doors. This increases the demand for the container in operation. Further development of this study is to