Jonas Verrière, Jocelyn Ahmed Mazari, Antoine Reverberi, Francis Hueber
NAFEMS World Congress 2023, Tampa, Florida, USA
In a context of more and more stringent environmental regulations and of energy savings, ship hull efficiency has become a key design aspect for all trading vessels like tankers or container vessels. To achieve an efficient hull design, the resistance curve of the boat needs to be assessed as early as possible in the initial design to establish the best possible architecture in a very short time before contracting. Such an assessment remains largely made with empirical methods due to the time constraint that prevents an extensive usage of CFD solvers, but those methods remain quite limited in terms of robustness and accuracy. Also it does not provide insight on the 3D physical field like wave patterns or pressure distributions on the hull. In this paper we are presenting how the Deep LearningPhysics (DLP) developed by Extrality can help address this challenge by delivering fast 3D high-fidelity predictions. First a generic DLP-model is built from a dataset of 288 CFD simulations covering a large portion of the design space. A general description of the DLP-model training is provided. Then a validation is carried out against CFD results, at different scales, from global coefficients up to 3D volume. Once validated, the DLP-model is then used to optimise the hull form of a general purpose oil tanker. This leads to a wave height in the bow portion of the new vessel significantly smaller, resulting in a reduced wave resistance. While CFD calculations require significant time and effort without learning ability, DLP can predict instantly fluid behaviours to assess hydrodynamic performances of multiple designs. As a result, 3D high-fidelity predictions can be performed extensively in the initial design phase and allows early stage optimisation.
1/ Extrality, 75002 Paris, France
2/ Caponnetto Hueber, 46024 Valencia, Spain