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Main Title: Experimental investigations on the fatigue resistance of automatically welded tubular X-joints for jacket support structures
Author(s): Schürmann, K.
Schaumann, P.
Pittner, A.
Rethmeier, Michael
Type: Article
Abstract: The development within the offshore wind sector towards more powerful turbines combined with increasing water depth for new wind parks is challenging both the designer as well as the manufacturer of bottom fixed support structures. Besides XL-monopiles, the market developed an innovative and economic jacket support structure which is based on automatically manufactured tubular joints combined with standardized pipes. Besides the improvements for a serial manufacturing process the automatically welded tubular joints show a great potential in terms of fatigue resistance e.g. due to a smooth weld geometry without sharp notches. However, these benefits are not considered yet within the fatigue design process of automatically manufactured jacket substructures according to current standards due to the lack of suitable S-N curves. Therefore, 32 axial fatigue tests on single and double-sided automatically welded tubular X-joints have been performed to determine a new hot spot stress related S-N curve. Based on these constant amplitude fatigue tests a new S-N curve equal to a FAT 126 curve was computed which implicitly includes the benefits of the automatically welding procedure.
Subject(s): fatigue resistance
tubular X-joints
jacket support structures
offshore wind sector
Issue Date: 2020
Date Available: 10-May-2022
Language Code: en
DDC Class: 530 Physik
Journal Title: Journal of Physics: Conference Series
Publisher: IOP
Volume: 1669
Issue: 1
Article Number: 012022
Publisher DOI: 10.1088/1742-6596/1669/1/012022
EISSN: 1742-6596
ISSN: 1742-6588
TU Affiliation(s): Fak. 5 Verkehrs- und Maschinensysteme » Inst. Werkzeugmaschinen und Fabrikbetrieb » FG Fügetechnik
Appears in Collections:Technische Universität Berlin » Publications

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