TY - CONF A1 - Pittner, Andreas T1 - Automated arc welding and quality assessment of large scale support structures for offshore wind turbines N2 - Offshore wind energy is a key driver in achieving a carbon dioxide-free industrial sector over the coming decades. However, the foundation systems for offshore wind plants significantly influence the overall installation process, alongside regulatory challenges. The adoption of lightweight design principles in steel construction, such as the use of dissolved load-bearing structures known as jacket foundations, holds substantial promise for reducing resource use, particularly the required volume of steel. This presentation focuses on the complete digitalization of the welding manufacturing and testing processes, enabling fully automated production and quality assessment of tubular nodes, which are critical components of jacket foundation structures. Additionally, the study examines the correlation between seam geometry and fatigue strength through numerical simulations inspired by bionic design principles. It demonstrates that tubular nodes can be welded entirely automatically while accommodating geometric tolerances. Moreover, seam geometries can be precisely manufactured according to the numerical models, significantly enhancing the service life of the structures. Finally, the resource efficiency and reduction in carbon dioxide emissions resulting from these advancements are analyzed through a life-cycle assessment, highlighting the environmental benefits of this approach. T2 - 77th IIW Annual Assembly and International Conference, C-XII: Arc Welding Processes and Production Systems CY - Rhodos, Greece DA - 07.07.2024 KW - Offshore wind KW - Support structures KW - Light-weight construction KW - Automated arc welding PY - 2024 AN - OPUS4-62016 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schaumann, P. A1 - Schürmann, K. A1 - Pittner, Andreas A1 - Rethmeier, Michael T1 - Automatically Welded Tubular X Joints for Jacket Substructures – Prediction of the Technical Fatigue Crack Location N2 - To increase the competitiveness of jacket substructures compared to monopiles a changeover from an individual towards a serial jacket production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Therefore, this paper addresses fatigue tests of automatically welded tubular X-joints focusing on the location of the technical fatigue crack. The detected location of the technical crack is compared to numerical investigations predicting the most fatigue prone notch considering the structural stress approach as well as the notch stress approach. Besides, the welding process of the automated manufactured tubular X-joints is presented. T2 - Nordic Steel 2019 CY - Copenhagen, Denmark DA - 18.09.2019 KW - Automated arc welding KW - Fatigue tests KW - Tubular X-joints KW - Technical crack detection KW - Local fatigue approaches PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-518490 DO - https://doi.org/10.1002/cepa.1140 VL - 3 IS - 3-4 SP - 823 EP - 828 PB - Wiley-VCH Verlag GmbH on behalf of Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG CY - Berlin AN - OPUS4-51849 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -