PSI - Issue 81

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

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determine the loading of the container under different operational schemes: stacking, loading and unloading operations, compression, etc. It is also planned to investigate the loading of the container when it is transported as part of a combined train on a railway-ferry ship. The conducted research will contribute to increasing the efficiency of bulk cargo transportation in international traffic, as well as creating developments regarding the modernization of the existing container fleet for bulk cargo transportation.

a)

b)

Fig. 10. Deflections of the analyzed hatch cover structure: a) a view 1; b) a view 2.

4. Conclusions A container concept for bulk cargo transportation is proposed. A feature of the container is that its floor is formed by the covers of the unloading hatches. This allows to accelerate the unloading of the container in the conditions of enterprises where they are processed. The dynamic loading of the container of the proposed design during transportation by rail was investigated. At the same time, the movement of the platform car along the track with joints was considered. It was established that at the moment of passing the joint, the acceleration acting on the platform car with containers is about 4 m/s 2 . After this, the acceleration decreases and is about 2.5 m/s 2 . A calculation was made for the strength of the unloading hatch cover of the container concept. The calculation results showed that the maximum stresses in the unloading hatch cover occur in the loops and are equal to 187 MPa. These stresses are 11% lower than the permissible ones. Thus, the strength of the container's unloading hatch cover is ensured. The maximum displacements in the unloading hatch cover nodes occur in the locking brackets and are approximately 1.8 mm. Acknowledgements This research was supported by the projects VEGA 1/0513/22 and KEGA No. 031ŽU -4/2023. „Funded by the EU NextGenerationEU through the Recovery and Resilience Plan for Slovakia under the project No. 09I03 03-V01- 00131.” References Bogach, I. V., Krakovetsky, O. Yu., Kylyk, L. V., 2020. Numerical Methods for Solving Differential Equations Using MathCad: Tutorial. Vinnytsia, 2020. 106 p. Caban, J., Brumerčík, F., Vrábel, J., Ignaciuk, P., Misztal, W., Marczuk, A., 2017. Safety of maritime transport in the Balti c Sea, 18th International Scientific Conference - LOGI 2017, České Budějovice, Czech Republic, paper #00003. Caban, J., Nieoczym, A., Gardyński, L., 2021. Strength analysis of a container semi -truck frame. Engineering Failure Analysis 127. Caban, J., Vrabel, J., Górnicka, D., Nowak, R., Jankiewicz, M., Matijošius, J., Palka, M., 2023. Overview of energy harvestin g technologies used in road vehicles. Energies 16, 3787. Cheng, K. J., Lees, C. H., Peng, C. C., 2024. Design and structural analysis of high payload C1 container. Journal of Physics: Conference Series 2878, 012012. Domin, Yu. V., Chernyak, G. Yu., 2003. Fundamentals of wagons dynamics: Tutorial. Kyiv: KUETT, 2003. 269 p. Drozhzhyn, O., 2024. International liner shipping: current challenges and threats. Scientific Journal of Silesian University of Technology Series Transport 125, 51 – 68. DSTU 7598:2014. Freight wagons. General requirements for calculations and design of new and modernized 1520 mm gauge wagons (non-self-propelled). Kyiv, 2015. 250 p. Ézsiás, L., Tompa, R., Fischer, S., 2024. Investigation of the possible correlations between specific characteristics of crushed stone aggregates. Spectrum of Mechanical Engineering and Operational Research 1, 10-26. Fischer, S., 2025. Investigation of the Settlement Behavior of Ballasted Railway Tracks Due to Dynamic Loading. Spectrum of Mechanical Engineering and Operational Research 2, 24-46. Fischer, S., Harangozó, D., Németh, D., Kocsis, B., Sysyn, M., Kurhan, D., Brautigam, A., 2024. Investigation of heat-affected zones of thermite rail welding. Facta Universitatis, Series: Mechanical Engineering 22, 689-710. Fischer, S., Kocsis Szürke, S., 2023. Detection process of energy loss in electric railway vehicles. Facta Universitatis, Series: Mechanical Engineering 21, 81-99. Frej, D., Grabski, P., Jurecki, R. S., Szumska, E. M., 2023. Experimental Study on Longitudinal Acceleration of Urban Buses and Coaches in Different Road Maneuvers. Sensors 23, 3125.