Transport & Logistics: The International Journal

Analysis of the strength of a hopper-type container when transported by a semi-trailer

Alyona Lovska, Juraj Gerlici, Ján Dižo, Oleksandr Kravchenko — Mon, 11 Dec 2023 12:31:21 +0000

Ensuring sustainable and stable development of the state economy necessitates the introduction into operation of intermodal transport systems. One of the most promising and widespread among them is container transportation. In order to maintain the competitiveness of container transportation, it is important to put into operation modern designs of containers intended for the transportation of a wide range of goods. In this regard, within the framework of the article, the design of a hopper-type container is proposed, which allows to transport bulk materials, as well as cargoes that require protection from atmospheric effects with the possibility of further unloading by gravity under the influence of gravitational properties. The results of the calculation of the strength of the container when loaded on a semi-trailer, as well as during its transportation, are presented. It was established that with the considered load schemes, the strength of the container is ensured. The natural frequencies and shapes of the container's vibrations are determined. The results of the thermal analysis of its design are given. It was established that the strength of the supporting structure of the container is maintained at a temperature of the transported cargo of 96°С. The conducted research will contribute to the creation of multi-functional container designs and increase the efficiency of container transportation.

Modern approaches in the design of transport handling equipment

Matúš Virostko, Martin Mantič — Mon, 18 Dec 2023 10:46:01 +0000

This paper deals about fundamentals of generative design and draws comparisons between the nature of software operation, topological optimization and generative design. Examples of shapes obtained using topological optimization and generative design are also given in the paper. The advantages and disadvantages of these modern technologies are also discussed.

Application of multi-criteria decision-making methods for the conveyor belt selection in practice

Miriam Andrejiová, Anna Grincova, Zuzana Kimakova — Mon, 18 Dec 2023 10:48:42 +0000

Determination of the weights (preferences) of criteria is the first step in the process of multiple criteria decision-making and the assessment of several variants, i.e. solutions to the decision-making problems in practice. The purpose of this article was to define the most important criteria (factors) and their preferences in the process of selecting a suitable type of conveyor belt or a suitable conveyor belt structure. The weights of selected criteria were determined by applying the multiple criteria decision-making methods (scoring method, best-worst method, pairwise comparison and Saaty’s method).

Traction bogie for narrow gauge tram with non-standard primary suspension

Petr Heller, Jiří Schön, Jan Beno, Karel Ráž — Mon, 18 Dec 2023 13:09:13 +0000

The article describes the research and development of a traction, rotating bogie for a low-floor tram. It draws attention to problems that had to be resolved during development.

The use of thermal vision in testing the tension of steel ropes

Jozef Kresak, Pavel Peterka, David Heinz — Wed, 20 Dec 2023 09:57:31 +0000

The article presents the results of experimental thermal imaging measurements of steel ropes as a basic structural element of handling and transport equipment. Based on the measurements, we can conclude that at an average value of the load of the tested ropes of 49.5%, the temperature in the critical point begins to rise significantly due to plastic deformation. When the set limit is exceeded in terms of Hooke's law, which expresses the relationship between the deformation of a solid body caused by the action of stress and the magnitude of this stress, plastic deformation (non-linear increase) occurs. Up to these values, the increase is linear and the deformation is directly proportional to the stress of the material. It is assumed that if the rope were damaged, the temperature could rise more sharply even with a smaller load on the rope. The presented results of the laboratory experiments and the course of the experiments themselves revealed the necessity of very accurate temperature targeting.

Noise source visualization of conveyor systems on the postal packaging sorting line

Marek Moravec, Miriama Piňosová — Wed, 20 Dec 2023 10:04:45 +0000

Sound visualization tools are now used for the identification and localization of noise sources. This paper aimed to locate and quantify noise sources on a packet sorting line using an acoustic camera and then propose noise reduction measures. Localization of noise sources was performed using an acoustic camera with a microphone ring array. The result of these measurements and analyses was to sort the individual noise sources from less noisy to the noisiest, which gives a good assumption for better planning of spending on the implementation of noise reduction measures. The outputs of these measurements also give information on the character and frequency composition of the sound of individual sources, which will help out in the design of specific measures for noise reduction.

Streamlining processes and their digitization with the help of simulation and visualization

Miriam Pekarčíková, Peter Trebuňa, Marek Kliment, Matúš Matiscsák, Michal Dic — Wed, 20 Dec 2023 10:08:45 +0000

In the 21st century, most of the world's leading companies use simulation programs to simulate various processes. Software aimed at modelling and simulation greatly increases productivity and efficiency in the creative activity of workers and opens the potential for interactivity of workers in the value chain of the enterprise and in real time. The result is shorter development time, higher product quality, data collection, management and processing, and less expensive physical prototypes. These programs make it possible to record the entire process in the smallest details and thus eliminate bottlenecks, deficiencies and various errors that could occur during real production. The simulation will ensure the tracking of the entire production process even before the start of real production, so that the production will be as efficient as possible without any downtime and errors. The aim of the article is to highlight the issue of simulation and the introduction of Industry 4.0 principles into companies to increase the overall efficiency of business processes.

Crossroads modelling methodology in Extendsim

Sat, 23 Dec 2023 20:48:30 +0000

Modelling and simulation are essential activities in the field of logistics. Many decisions are based on analysis and results provided in the form of simulation model statistics. The ExtendSim simulation program found its use in modelling internal company processes such as production, storage, and internal transport. Other software is used for non-company transport, but these processes can also be modelled in ExtendSim. However, the modelling procedure is complex and requires knowledge of the software and the modelled object. The methodology is shown in the example of a crossroads model. The model is quite complex and uses elements of programming. Overall, the advantages and disadvantages of modelling the crossroads in ExtendSim are pointed out, and the possibility of practical use of the methodology is assessed, even with other simulation software.

New technologies in management of ground movements at the airport

Peter Koščák, Martina Koščáková, Lenka Stanislavová — Thu, 28 Dec 2023 13:46:58 +0000

Modernization and implementation of the most modern technologies in the process of air transport management is one of the most effective solutions that need to be clarified in the process of developing the airport and its capacity. The aim of this article is to characterize the basic activities of aircraft ground handling and the processes of automation of ground operations, to describe current ground movement control technologies in airport areas and to present the components of an optimal ground movement control system at regional airports. This article investigates the limited adoption of advanced ground movement management technologies in regional and small airports, attributing the hesitation primarily to financial constraints. The study reveals efforts toward modernization for enhanced operational efficiency and passenger satisfaction. However, financial limitations pose challenges, especially for smaller airports lacking regular flights and passenger volume. The research emphasizes key priorities for regional airports, including accelerating the check-in process, improving overall airport efficiency, and minimizing operational costs. The article concludes by emphasizing the critical role of such technologies in improving airport safety, efficiency, and overall air transport quality, urging airport management to consider their integration for a transformative impact on operations.

Simulation of mine vertical transport

Janka Saderova — Sat, 30 Dec 2023 14:06:51 +0000

Vertical transport with the help of mining hoisting equipment in the deep mining of mineral raw materials is an essential part of the entire complex of intra-company transport at every mining plant. This paper aims to simulate the transport cycle of single-acting hoisting equipment. EXTENDSim was used as a simulation tool, which combines the possibilities of discrete and continuous simulation and is used by researchers in various fields. Two simulation models are presented in the paper. The first simulation model represents the transport cycle from the underground to the surface during material transport. The second simulation model is extended to transport material from the surface to the underground. The paper also presents the results of the experiments performed on the created simulation models. The simulation model is a suitable auxiliary tool for the decision-making process or analysis of the current state and rationalisation.