Numerical Investigation on the Motion Dynamics of Submerged Gravity Anchors Exposed to Wave Action

verfasst von: Vinay Kumar Vanjakula, Christian Windt, Frank Adam, Nils Goseberg
Abstract: This paper presents a numerical modeling approach to analyze the dynamic response of gravity anchors subjected to waves at various submergence depths. The aim is to model stages of lowering during the installation process of offshore wind energy installations. The study includes an investigation of the effect of different outer shapes of the gravity anchor to understand the influence on the dynamic response of the anchor. The results demonstrate that the submergence depth has a significant impact on the stability of the anchor during the lowering process, particularly at the initial lowering phase, resulting in higher wave-induced forces and increased risks of instability. With the use of streamlined anchor shapes, compared with the results for the baseline anchor, a reduction of 20.9% and 16.6% in heave, 47.8% and 45.8% in pitch, and 73.4% and 75.3% in surge motions are observed for C- and V-shaped anchors, respectively. When comparing the influence of different wave parameters, compared with the wave height, the wavelength is shown to drive undesirable anchor dynamic motions.
Organisationseinheit(en): Forschungszentrum Küste
Externe Organisation(en): GICON - Großmann Ingenieur Consult GmbH
Technische Universität Braunschweig
Typ: Artikel
Journal: Journal of Waterway, Port, Coastal and Ocean Engineering
Band: 151
Anzahl der Seiten: 19
ISSN: 0733-950X
Publikationsdatum: 2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Tief- und Ingenieurbau, Gewässerkunde und -technologie, Meerestechnik
Elektronische Version(en): https://doi.org/10.1061/JWPED5.WWENG-2122 (Zugang: Offen)

BibTeX

@article{72d5ac71daae422c88f552808174df21,
title = "Numerical Investigation on the Motion Dynamics of Submerged Gravity Anchors Exposed to Wave Action",
abstract = "This paper presents a numerical modeling approach to analyze the dynamic response of gravity anchors subjected to waves at various submergence depths. The aim is to model stages of lowering during the installation process of offshore wind energy installations. The study includes an investigation of the effect of different outer shapes of the gravity anchor to understand the influence on the dynamic response of the anchor. The results demonstrate that the submergence depth has a significant impact on the stability of the anchor during the lowering process, particularly at the initial lowering phase, resulting in higher wave-induced forces and increased risks of instability. With the use of streamlined anchor shapes, compared with the results for the baseline anchor, a reduction of 20.9% and 16.6% in heave, 47.8% and 45.8% in pitch, and 73.4% and 75.3% in surge motions are observed for C- and V-shaped anchors, respectively. When comparing the influence of different wave parameters, compared with the wave height, the wavelength is shown to drive undesirable anchor dynamic motions.",
author = "Vanjakula, {Vinay Kumar} and Christian Windt and Frank Adam and Nils Goseberg",
note = "Publisher Copyright: {\textcopyright} 2024 This work is made available under the terms of the Creative Commons Attribution 4.0 International license.",
year = "2025",
doi = "10.1061/JWPED5.WWENG-2122",
language = "English",
volume = "151",
journal = "Journal of Waterway, Port, Coastal and Ocean Engineering",
issn = "0733-950X",
publisher = "American Society of Civil Engineers (ASCE)",
number = "1",
}