PSI - Issue 81

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

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a)

b)

Fig. 2. A spatial model of the container: a) a view 1; b) a view 2.

In this case, the unloading hatch cover has an identical design to the unloading hatch cover used on a gondola. However, its geometric dimensions are reduced compared to the typical one. This is due to the geometric parameters of the container. Therefore, the width of the unloading hatch cover is 1,325 mm, and the length is 1,140 mm. The spatial model of the unloading hatch cover is shown in Fig. 3.

a)

b)

Fig. 3. A spatial model of the unloading hatch cover: a) a view 1; b) a view 2

To study the strength of the unloading hatch cover under operational loads, its calculation was carried out. The finite element method was used, which was reproduced in SolidWorks Simulation presented by Kozyar et al. (2018) and Pustyulga et al. (2018). The calculation scheme of the unloading hatch cover is shown in Fig. 4. It takes into account the effect on the unloading hatch cover of the vertical load P v , which includes vertical static and dynamic loads. Reactions P k to the action of the vertical load P v were applied to the locking brackets. To determine the vertical dynamic load acting on the container as a whole, mathematical modeling was performed. The case of container transportation by a platform car along a track with joint irregularities was considered. The design scheme of a platform car with containers is shown in Fig. 5. Jumping and galloping oscillations were taken into account. The flat wagon model 13-7024 was considered as a prototype. It was taken into account that the platform car is loaded with four containers that have the same gross weight. The containers do not have their own degree of freedom and repeat the trajectory of the platform car movements.

Fig. 4. A Calculation diagram of the unloading hatch cover.

Fig. 5. A calculation diagram of a flat wagon with containers.