JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND

Stéphane Kovacs; Philipp Thies; Lars Johanning; Alun Jones; Mark Spring; Philip Strong

doi:10.1115/IOWTC2023-119172

JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND

Stéphane Kovacs^*
, Philipp Thies
, Lars Johanning
, Alun Jones
, Mark Spring
, Philip Strong

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

Abstract

Anchoring and mooring systems are identified as a key area of innovation in the context of recent increasing demand in Floating Offshore Wind (FLOW) installations. This paper presents the technology assessment of the JAVELIN Anchor developed by Reflex Marine Ltd for FLOW application in the JAVELIN anchor demonstration program. The deepset JAVELIN Tensile anchor provides a competitive anchoring solution for FLOW installed with low cost work vessel and proven drilling technique. Several design criteria have to be met: i) sufficient strength of the material in ultimate limit state and the fatigue limit state. ii) anchor design to have low installation and capital cost. iii) efficient in various type of geotechnical formation. The strength of the material is analysed in finite element package, namely Ansys. A Tensile Member in Carbon Steel met the design requirement with a diameter 0.2 m for 1000 t application. In addition, the maximum load cases are modeled in hydrodynamic software, namely Orcaflex to simulate the dynamics of the JAVELIN anchor for several sea state, soil resistance and mooring configurations, taking into account the coupled dynamics between wind turbine, floater and mooring systems. For water depths varying from 200 − 400 m, the tension values are lower than the load cases studied in the strength of the material.

Original language	English
Title of host publication	Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023
Publisher	The American Society of Mechanical Engineers(ASME)
ISBN (Electronic)	9780791887578
DOIs	https://doi.org/10.1115/IOWTC2023-119172
Publication status	Published - 2023
Event	ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023 - Exeter, United Kingdom Duration: 18 Dec 2023 → 19 Dec 2023

Publication series

Name	Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023

Conference

Conference	ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023
Country/Territory	United Kingdom
City	Exeter
Period	18/12/23 → 19/12/23

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

Fluid Flow and Transfer Processes
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Mechanical Engineering
Ocean Engineering
Safety, Risk, Reliability and Quality
Modeling and Simulation
Numerical Analysis

Keywords

Computational Mechanics and Design
Design of Offshore Structures
Dynamics of Structures
Floating and Moored Production Systems
Foundation
Reliability Based Codes and Guidelines
Structural Mechanics

Access to Document

10.1115/IOWTC2023-119172

Cite this

Kovacs, S., Thies, P., Johanning, L., Jones, A., Spring, M., & Strong, P. (2023). JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND. In Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023 (Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023). The American Society of Mechanical Engineers(ASME). https://doi.org/10.1115/IOWTC2023-119172

@inproceedings{a8c38d65d4d34f73a41f06accd42437b,

title = "JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND",

abstract = "Anchoring and mooring systems are identified as a key area of innovation in the context of recent increasing demand in Floating Offshore Wind (FLOW) installations. This paper presents the technology assessment of the JAVELIN Anchor developed by Reflex Marine Ltd for FLOW application in the JAVELIN anchor demonstration program. The deepset JAVELIN Tensile anchor provides a competitive anchoring solution for FLOW installed with low cost work vessel and proven drilling technique. Several design criteria have to be met: i) sufficient strength of the material in ultimate limit state and the fatigue limit state. ii) anchor design to have low installation and capital cost. iii) efficient in various type of geotechnical formation. The strength of the material is analysed in finite element package, namely Ansys. A Tensile Member in Carbon Steel met the design requirement with a diameter 0.2 m for 1000 t application. In addition, the maximum load cases are modeled in hydrodynamic software, namely Orcaflex to simulate the dynamics of the JAVELIN anchor for several sea state, soil resistance and mooring configurations, taking into account the coupled dynamics between wind turbine, floater and mooring systems. For water depths varying from 200 − 400 m, the tension values are lower than the load cases studied in the strength of the material.",

keywords = "Computational Mechanics and Design, Design of Offshore Structures, Dynamics of Structures, Floating and Moored Production Systems, Foundation, Reliability Based Codes and Guidelines, Structural Mechanics",

author = "St{\'e}phane Kovacs and Philipp Thies and Lars Johanning and Alun Jones and Mark Spring and Philip Strong",

note = "Publisher Copyright: Copyright {\textcopyright} 2023 by ASME.; ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023 ; Conference date: 18-12-2023 Through 19-12-2023",

year = "2023",

doi = "10.1115/IOWTC2023-119172",

language = "English",

series = "Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023",

publisher = "The American Society of Mechanical Engineers(ASME)",

booktitle = "Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023",

address = "United States",

}

Kovacs, S, Thies, P, Johanning, L, Jones, A, Spring, M & Strong, P 2023, JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND. in Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023. Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023, The American Society of Mechanical Engineers(ASME), ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023, Exeter, United Kingdom, 18/12/23. https://doi.org/10.1115/IOWTC2023-119172

JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND. / Kovacs, Stéphane; Thies, Philipp; Johanning, Lars et al.
Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023. The American Society of Mechanical Engineers(ASME), 2023. (Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings published in a book › peer-review

TY - GEN

T1 - JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND

AU - Kovacs, Stéphane

AU - Thies, Philipp

AU - Johanning, Lars

AU - Jones, Alun

AU - Spring, Mark

AU - Strong, Philip

PY - 2023

Y1 - 2023

N2 - Anchoring and mooring systems are identified as a key area of innovation in the context of recent increasing demand in Floating Offshore Wind (FLOW) installations. This paper presents the technology assessment of the JAVELIN Anchor developed by Reflex Marine Ltd for FLOW application in the JAVELIN anchor demonstration program. The deepset JAVELIN Tensile anchor provides a competitive anchoring solution for FLOW installed with low cost work vessel and proven drilling technique. Several design criteria have to be met: i) sufficient strength of the material in ultimate limit state and the fatigue limit state. ii) anchor design to have low installation and capital cost. iii) efficient in various type of geotechnical formation. The strength of the material is analysed in finite element package, namely Ansys. A Tensile Member in Carbon Steel met the design requirement with a diameter 0.2 m for 1000 t application. In addition, the maximum load cases are modeled in hydrodynamic software, namely Orcaflex to simulate the dynamics of the JAVELIN anchor for several sea state, soil resistance and mooring configurations, taking into account the coupled dynamics between wind turbine, floater and mooring systems. For water depths varying from 200 − 400 m, the tension values are lower than the load cases studied in the strength of the material.

AB - Anchoring and mooring systems are identified as a key area of innovation in the context of recent increasing demand in Floating Offshore Wind (FLOW) installations. This paper presents the technology assessment of the JAVELIN Anchor developed by Reflex Marine Ltd for FLOW application in the JAVELIN anchor demonstration program. The deepset JAVELIN Tensile anchor provides a competitive anchoring solution for FLOW installed with low cost work vessel and proven drilling technique. Several design criteria have to be met: i) sufficient strength of the material in ultimate limit state and the fatigue limit state. ii) anchor design to have low installation and capital cost. iii) efficient in various type of geotechnical formation. The strength of the material is analysed in finite element package, namely Ansys. A Tensile Member in Carbon Steel met the design requirement with a diameter 0.2 m for 1000 t application. In addition, the maximum load cases are modeled in hydrodynamic software, namely Orcaflex to simulate the dynamics of the JAVELIN anchor for several sea state, soil resistance and mooring configurations, taking into account the coupled dynamics between wind turbine, floater and mooring systems. For water depths varying from 200 − 400 m, the tension values are lower than the load cases studied in the strength of the material.

KW - Computational Mechanics and Design

KW - Design of Offshore Structures

KW - Dynamics of Structures

KW - Floating and Moored Production Systems

KW - Foundation

KW - Reliability Based Codes and Guidelines

KW - Structural Mechanics

UR - https://www.scopus.com/pages/publications/85185226377

U2 - 10.1115/IOWTC2023-119172

DO - 10.1115/IOWTC2023-119172

M3 - Conference proceedings published in a book

AN - SCOPUS:85185226377

T3 - Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023

BT - Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023

PB - The American Society of Mechanical Engineers(ASME)

T2 - ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023

Y2 - 18 December 2023 through 19 December 2023

ER -

Kovacs S, Thies P, Johanning L, Jones A, Spring M, Strong P. JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND. In Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023. The American Society of Mechanical Engineers(ASME). 2023. (Proceedings of ASME 2023 5th International Offshore Wind Technical Conference, IOWTC 2023). doi: 10.1115/IOWTC2023-119172

JAVELIN ANCHOR ADAPTED FOR FLOATING OFFSHORE WIND

Abstract

Publication series

Conference

UN SDGs

ASJC Scopus subject areas

Keywords

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