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    Item type:Publication, Access status: without files ,
    On the development of an onboard sea state estimator based on numerical vessel motion data
    (International Society of Offshore and Polar Engineers, 2022-06)
    Reiner, Carl
    ;
    Detlefsen, Ole
    ;
    Abdel-Maksoud, Moustafa
    Within the Joint Research Project RetroLadung, weight-optimized cell guides with integrated motion sensors and data-driven decision support systems (DSS) are developed. A basic functionality of the DSS is the estimation of sea states based on measurement data from acceleration sensors. A convolutional neural network (CNN) is created for this task and trained with simulation data. This paper presents the early development stage of the network during which unimodal, short-crested seas described with JONSWAP spectra are considered. Thereby, the forward speed is excluded. Model tank tests are conducted by the Institute for Fluid Dynamics and Ship Theory (FDS) and results are used to validate the predictions of the sea state estimation (SSE).
    Publicationtype: Conference Paper
      99
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    A reliable multilevel method for simulation-based load determination on deck cell guides
    (American Society of Mechanical Engineers (ASME), 2022-06)
    Detlefsen, Ole
    ;
    Reiner, Carl
    ;
    Abdel-Maksoud, Moustafa
    The loss of containers at sea endangers ships and crew and causes environmental pollution. Within the Joint Research Project RetroLadung, weight-optimized container cell guides with integrated motion sensors and AI-based decision support (DSS) are developed as a technical solution for increased safety in marine transportation. Therefore, the authors developed an efficient simulation-based approach to determine the motion-induced loads acting on the containers. For the validation of the applied numerical methods, model tests have been performed in the towing tank operated by the Institute for Fluid Dynamics and Ship Theory (FDS). The paper describes the applied numerical methods for the load determination and first preliminary results from the ongoing experimental validation work. Finally, the application of the developed method is demonstrated by calculating the loads for the structural design and optimization of the cell guides for a towed container barge operated at the US east coast.
    Publicationtype: Conference Paper
      58