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Proposal of a methodology of criterial assessment of technical indicators for the purpose of selecting an optimal semi-trailer tractor for the needs of a transport company

Blatnický Miroslav, Dižo Ján, Lovska Alyona

Zeszyty Naukowe. Transport / Politechnika Śląska

2025

z. 127

5--21

The goal of this work is to describe the current state of road freight transport from the point of view of the entrepreneur and the owner of semi-trailer tractors within the Slovak Republic. The article contains a brief description of freight transport works and points out the individual aspects of doing business in this sphere in Slovakia. In the next one, an original criterion evaluation program is created in the MS Excel application for semi-trailer tractors. In this program, an owner, a future owner, or a driver of a tractor can compare any number of tractors. Subsequently, based on the point evaluation, the program determines, which tractor in the comparison has more points and, therefore, it is more suitable for business activity. A sample comparison will be made on two tractors (Swedish and German brands) operated by a commercial transport company. The parameters of the tractors given, checked and calculated by the manufacturer are implemented in the criterion evaluation program. In the criterion evaluation, a tractor of one brand scored more points and therefore won. All knowledge, results, and conclusions found in the work are discussed with the management of a commercial transport company and its drivers. Based on the findings and results achieved, it can be concluded that the criterion evaluation program is extremely suitable for the application of any tractor, any brand, and thus the condition of the repeatability of the experiments is guaranteed. Based on these aspects, all the objectives of the work were fulfilled, and thus the result of the research is suitable as a decision-making aid for the purchase of a tractor for the future owner.

Determination of the loading on the open wagon body when rolling on the train ferry

Gerlici Juraj, Vatulia Glib, Lovska Alyona, Kravchenko Kateryna, Harušinec Jozef, Suchánek Andrej

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2024

Vol. 18 No. 3

683--687

The higher efficiency of international transportation necessitates the introduction of combined transport systems. One of the most successful among these is train ferry transportation. And in order to provide safe transportation of wagons by sea, it is important to formulate the operational requirements for railway-sea transportation. And one of the loading modes for wagons is rolling on the train ferry. The article presents the results of determining the dynamic load of the open wagon body when rolling on the train ferry. The calculation was made for the open wagon placed on 18-100 bogies. A mathematical model was formed, which made it possible to determine the main dynamic indicators that characterize the movement of the wagon. The results of the calculations were used to determine the permissible inequality amplitude in the zone of interaction between the rail tracks of the bridge and the ferry deck so that the indicators of the car dynamics would be within the permissible values. The permissible value of the inequality amplitude was 0.021 m. The conducted studies will contribute to the database of developments on ensuring the operational safety of wagons used for international railway-sea transportation.