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    Item type:Publication, Access status: with files ,
    Betriebskennlinien für Portalkrane – Analyse der Leistungsfähigkeit von Umschlagterminals zur Steuerung der Lkw-Ankünfte
    (2025-03-28)
    Alieksieiev, Volodymyr
    ;
    Beigpoor Shahrivar, Rafat
    ;
    Mundt, Christopher
    ;
    Lange, Ann-Kathrin
    ;
    Jahn, Carlos
    In the “BePoT” research project, the Funnel model from production logistics was successfully transferred to the gantry crane operations of a combined transport terminal. Based on this, throughput diagrams and Logistic Operating Curves (LOCs) were derived for two main types of orders at combined transport terminals – crane orders and dispatch orders. On the one hand, these models make it possible to systematically and generally describe the logistics objective conflict between high mean crane output rate and short mean throughput times of crane and dispatch orders. On the other hand, they form the basis for the monitoring, utilization, and booking systems developed in the project. In addition, the research project developed partial models for three key types of operational waste at combined transport terminals – intermediate storage, restacking and empty crane runs – as well as for the corresponding improvement measures – direct transshipments, stacking logics and double cycles. These partial models describe the respective types of waste and improvement measures as a function of their control variables. On the other hand, by integrating them into the LOC models, it is possible to describe the individual effects and the overall effect on the logistics objectives of combined transport terminals. The results achieved in the project show that these improvement measures have great potential to increase the handling performance and to defuse the logistics objective conflict in combined transport terminals.
    Publicationtype: Project Deliverable
      73  27
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    Item type:Publication, Access status: without files ,
    Modeling of logistics objectives at rail-road inland transshipment terminals
    (Springer, 2024-09-08)
    Alieksieiev, Volodymyr
    ;
    Beigpoor Shahrivar, Rafat
    ;
    Jahn, Carlos
    ;
    Lödding, Hermann
    The logistics performance of inland transshipment terminals, such as rail-road container terminals, is crucial for establishing a reliable combined transport and for accomplishing sustainability goals. Main logistics objectives, such as high output rate and short throughput times, cannot be achieved simultaneously, creating an objective conflict. Modeling the interdependencies between the objectives can support terminals in determining an optimal operation point depending on their goals. Previously, these interdependencies have been analyzed primarily using complex simulation or optimization models. This paper presents an approach to model these interdependencies using Logistic Operating Curves (LOCs) and validates it using simulation.
    Publicationtype: Conference Paper
      85
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    Item type:Publication, Access status: with files ,
    Untersuchung von Doppelspielen eines Portalkrans auf Umschlagterminals
    (Selbstverlag der Technischen Universität Dresden, 2024-03-12)
    Alieksieiev, Volodymyr
    ;
    Winter, Jesse-James
    ;
    Harlem, Jannick von
    ;
    Grafelmann, Michaela
    ;
    Jahn, Carlos
    Die Leistungsfähigkeit von Umschlagterminals ist ein wichtiger Faktor für die Wettbewerbsfähigkeit und die Attraktivität des Kombinierten Verkehrs (KV). Dieser kann einen wichtigen Beitrag zur Erfüllung der Nachhaltigkeitsziele Deutschlands leisten. Wichtigstes Arbeitssystem von KV-Umschlagterminals ist häufig ein Portalkran. Seine Leistung beeinflusst die Abfertigungsleistung eines Terminals und somit des Kombinierten Verkehrs. Steuerungsstrategien der Portalkrane können helfen, die Abfertigungszeit der Verkehrsträger, den Energiebedarf und die Betriebskosten der Krananlagen zu reduzieren und logistische und betriebswirtschaftliche Zielerreichung eines Terminals zu verbessern. Eine dieser Strategien ist die Doppelspielstrategie. Bei der Doppelspielstrategie erfolgen Beladungen und Entladungen der Verkehrsmittel alternierend mit dem Ziel, Leerfahrtzeiten zu reduzieren. Ziel dieses Beitrags ist es, den Einfluss der Doppelspiele auf die Kranleistung und den Energiebedarf der Krananlagen zu untersuchen und ihren optimalen Einsatz im operativen Kranbetrieb zu diskutieren.
    Publicationtype: Conference Paper
      29  53
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    Item type:Publication, Access status: without files ,
    Logistics Objective conflicts at intermodal terminals
    (Thüringer Universitäts- und Landesbibliothek Jena, 2023-09-13)
    Grafelmann, Michaela
    ;
    Alieksieiev, Volodymyr
    ;
    Lödding, Hermann
    ;
    Jahn, Carlos
    Gantry cranes are essential working systems at intermodal terminals. Their operation faces conflicting logistical objectives, such as improving the throughput time of the loading units, increasing the handling output, or reducing the waiting times of vehicles. Possible methods for analysing such conflicting objectives are Logistic Operating Curves (LOC) and throughput diagrams, which have found application in production logistics and can be derived and verified using simulation. In this paper, a simulation model for intermodal terminals is proposed to parameterize characteristic LOC. The LOC are used to analyse the conflict between the target values of a high output rate and a low throughput time.
    Publicationtype: Conference Paper
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