PSI - Issue 59

J. Gerlici et al. / Procedia Structural Integrity 59 (2024) 66–73 Juraj Gerlici et al. / Structural Integrity Procedia 00 (2023) 000 – 000

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operations (DSTU 7598:2014). However, the authors did not determine the transverse loading of the open wagon body. To improve the strength of the sidewall panelling of the open wagon body, it has been proposed to strengthen the most loaded area with transverse corrugations in article by Vatulia et. al. (2023). This can increase the fatigue strength of the body panelling by 3.7% compared to a typical design. The results of calculation of the dynamics and strength of the improved open wagon body are also given. Significantly, the use of transverse corrugations does not help to reduce the dynamic load of the open wagon body in operation. The possibility of using honeycomb sandwich panels as components of the hopper wagon body is studied in study by Ayman Al-Sukhon et al. (2021). The results of tests of the improved hopper wagon are given. The analysis of these results has confirmed the feasibility of the proposed solution. However, the authors did not discuss the issue of determining the dynamic load of the hopper wagon body with sandwich panels. Publication by Lovska et al. (2023) provides substantiation of sandwich panels as wagon flooring. By implementing the proposed solution, the dynamic loads acting on the load-bearing structure of the wagon can be reduced by 8.4% compared to those of a typical design. At the same time, the acceleration acting on the freight placed on the flat wagon is reduced by 11.7%. Unfortunately, no attention was paid to the determination of the transverse load of the wagon with components made of sandwich panels. The analysis of literature sources has made it possible to conclude that the issues of using sandwich panels in wagon structures are relevant. However, the authors have not given much attention to the determination of the transverse load of wagon bodies with sandwich panelling. coefficient of viscous resistance of the energy absorbing material of a sandwich panel P l longitudinal loading on the rear support of the automatic coupling which is taken equal to 3.5 MN Р load acting on the slab а width of the slab b height of the slab µ Poisson’s ratio δ thickness of the slab Р v vertical load Р р transverse load 2. Methodology The purpose of the study is to determine the transverse load of the open wagon body with side walls made of sandwich panels. To achieve this purpose, the following objectives have been defined: mathematical modelling of the dynamic load of an open wagon body with side walls made of sandwich panels; and strength calculation of an open wagon body with side walls made of sandwich panels. 3. Results and discussion In order to reduce the load of the open wagon body panelling, and, accordingly, its potential damage, it has been proposed to make the panelling sectional, where each section is formed by sandwich panels. Thus, the panel design is two metal sheets with an energy-absorbing material between them (Fig. 2). Nomenclature І ow moment of inertia of the open wagon stiffness of springs in the spring suspension c B 2b F в width of the wagon body moment of forces arising between the freight and the wagon body І в с β moment of inertia of the freight stiffness of the energy-absorbing material of a sandwich panel