Mooring Design for WECs

Bergdahl, Lars

doi:10.1007/978-3-319-39889-1_7

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…The benefits of each model were assessed, and even though every model had merit, the lumped mass (LM) model was selected for inclusion in the mooring analysis program (MAP). Bergdahl [195] addresses the number of environmental factors that should be considered when developing a mooring system for WECs. An overview of how to build a mooring system with the help of static, dynamic, and quasi-static models is present in various design stages.…”

Section: Dynamic Approach For Mooring Designmentioning

confidence: 99%

Review of Wave Energy Converter and Design of Mooring System

et al. 2020

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In recent decades, the emphasis on renewable resources has grown considerably, leading to significant advances in the sector of wave energy. Nevertheless, the market cannot still be considered as commercialized, as there are still other obstacles in the mooring system for wave energy converters (WECs). The mooring system must be designed to not negatively impact the WEC’s efficiency and reduce the mooring loads. Firstly, the overview of the types of wave energy converters (WECs) are classified through operational principle, absorbing wave direction, location, and power take-off, respectively, and the power production analysis and design challenges of WECs are summarized. Then, the mooring materials, configurations, requirements, and the modeling approaches for WECs are introduced. Finally, the design of mooring systems, including the design considerations and standards, analysis models, software, current research focus, and challenges are discussed.

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Section: Dynamic Approach For Mooring Designmentioning

confidence: 99%

Review of Wave Energy Converter and Design of Mooring System

et al. 2020

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“…Johanning et al [20] suggest that mooring design for WECs must consider new requirements, other than those that are captured in existing offshore standards such as DNV-OS-E301 [30], a view also shared by [22,31,32].…”

Section: Comparison With Moorings In Other Offshore Engineering Fieldsmentioning

confidence: 99%

“…Discussion of the range of environmental inputs to be considered, when designing a WEC mooring system is given by Bergdahl [32]. An illustrative example is presented to show the procedure for designing a mooring system, using static, quasi-static and dynamic models in different stages of the design process.…”

Section: Mooring Designmentioning

confidence: 99%

“…For example, recommendations on design inputs for offshore position mooring systems are given in the offshore standard, DNV OS-E301, by Det Norske Veritas (DNV) [30], and for the specific case of WEC mooring systems by Bergdahl [32].…”

Section: Environmental Inputsmentioning

confidence: 99%

“…Commercial: [192] x [19] In-house: -AQUA-FE x [62,193] -MooDy [194] x [7,17,195] -MoDEX [196] x [22,32,123] -WHOI Cable [197] x x [65,80] The commercial packages include AQWA, DNV SESAM, Flexcom, OrcaFlex and Proteus-DS. AQWA was developed by ANSYS and provides a toolset for investigating the effects of environmental loads on floating and fixed offshore structures.…”

Section: Software S Qs Td Fd Wec Used Bymentioning

confidence: 99%

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Mathematical Modelling of Mooring Systems for Wave Energy Converters—A Review

2017

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Mathematical analysis is an essential tool for the successful development and operation of wave energy converters (WECs). Mathematical models of moorings systems are therefore a requisite in the overall techno-economic design and operation of floating WECs. Mooring models (MMs) can be applied to a range of areas, such as WEC simulation, performance evaluation and optimisation, control design and implementation, extreme load calculation, mooring line fatigue life evaluation, mooring design, and array layout optimisation. The mathematical modelling of mooring systems is a venture from physics to numerics, and as such, there are a broad range of details to consider when applying MMs to WEC analysis. A large body of work exists on MMs, developed within other related ocean engineering fields, due to the common requirement of mooring floating bodies, such as vessels and offshore oil and gas platforms. This paper reviews the mathematical modelling of the mooring systems for WECs, detailing the relevant material developed in other offshore industries and presenting the published usage of MMs for WEC analysis.

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Comparison and Validation of Hydrodynamic Theories for Wave Energy Converter Modelling

et al. 2021

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Dynamic Wave Energy Converter (WEC) models utilize a wide variety of fundamental hydrodynamic theories. When incorporating novel hydrodynamic theories into numerical models, there are distinct impacts on WEC rigid body motions, cable dynamics, and final power production. This paper focuses on developing an understanding of the influence several refined hydrodynamic theories have on WEC dynamics, including weakly nonlinear Froude-Krylov and hydrostatic forces, body-to-body interactions, and dynamic cable modelling. All theories have evolved from simpler approaches and are of importance to a wide array of WEC archetypes. This study quantifies the impact these theories have on modelling accuracy through a WEC case study. Theoretical differences are first explored in a regular sea state. Subsequently, numerical validation efforts are performed against field data following wave reconstruction techniques. Comparisons of significance are WEC motion and cable tension. It is shown that weakly nonlinear Froude-Krylov and hydrostatic force calculations and dynamic cable modelling both significantly improve simulated WEC dynamics. However, body-to-body interactions are not found to impact simulated WEC dynamics.

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Mooring Design for WECs

Cited by 3 publications

References 16 publications

Review of Wave Energy Converter and Design of Mooring System

Review of Wave Energy Converter and Design of Mooring System

Mathematical Modelling of Mooring Systems for Wave Energy Converters—A Review

Comparison and Validation of Hydrodynamic Theories for Wave Energy Converter Modelling

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