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Conference programme 

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Poster session

Lead Session Chair:
Stephan Barth, Managing Director, ForWind - Center for Wind Energy Research, Germany
Isaac Tavares Centrica, United Kingdom
Co-authors:
Isaac Tavares (1) F P Feargal Brennan (2)
(1) Centrica, Windsor, United Kingdom (2) Cranfield University, Cranfield, United Kingdom

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Poster
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Presenter's biography

Biographies are supplied directly by presenters at OFFSHORE 2015 and are published here unedited

ISAAC TAVARES, MSC, BENG, CENG MICE, CMgr MCMI
Isaac Tavares has over a decade of combined experience of capital project planning, delivery and operational phases.
After completing a BEng in Civil & Environmental Engineering at UCL, Isaac went on to do a Masters specializing in the use of nano-manipulated steel.
He went on to work as an engineering consultant for several years, being involved in the design of many of the existing Offshore Wind farms, and subsequently their construction and commissioning. Isaac is currently engaged with the operations and asset integrity of several windfarms in Centrica’s portfolio.

Abstract

The slic project – advancing fatigue design guidance & standards for offshore wind

Introduction

SLIC – Structural Lifecycle Industry Collaboration is a Joint Industry Project with the participation of 10 Offshore Wind Operators, the UK Department for Energy and Climate Change and The Crown Estate. It has the technical support of several reputable academic institutions such as Cranfield University and all major Offshore Wind Class Societies DNV, Germanicher Lloyd and Lloyds Register.

Approach

The SLIC is a programme of research and testing intended primarily to develop a robust body of evidence, specifically appropriate for the load regime, materials, geometry and environmental conditions that apply to offshore wind turbine sub-structures addressing the current knowledge gap.

The project aims to develop the currently available body of knowledge for the design of Offshore Wind monopile type foundations and contribute to reduce the LCoE of future projects. Additionally it is expected that the data developed by the SLIC will allow prolonged life extensions of existing structures.


Main body of abstract

The design of steel offshore foundation structures has been based largely on Oil & Gas standards and guidance which was migrated across, and served as the basis for the creation of offshore wind standards. Much of the original research is now several decades old, and was based on characteristics that were representative of typical Oil & Gas offshore structures, but differ fundamentally in terms of load regimes, structural characteristics and environment to typical offshore wind substructures.

In this intervening period materials, fabrication technologies, inspection and design techniques have evolved significantly and it is considered that fatigue tests on contemporary materials using representative manufacturing techniques, and exposed to relevant environments and loading would yield important information to support informed decisions concerning existing structures and future developments in terms of design savings, construction, and operation.

Additionally under current industry practice several wind farm developments although not exclusively, are designed and operated in accordance with Det Norske Veritas standards (DNV), these have over the past few years been updated to reflect the extents of the currently established body of knowledge.

The need exists to re-address these issues in order to build a knowledge-base and methodologies that reflect the conditions in which current structures operate, and enable the design of new structures to be optimized accordingly.


Conclusion

The SLIC has completed the initial feasibility stage and the Pre-testing phase both these stages have already helped establish a wealth of knowledge and tailored methodologies were developed to define bespoke solutions to the complexities of the Main testing Phase. The Maint testing Phase is currently ongoing and initial results are expected to be available towards the first quarter of 2015.


Learning objectives
The SLIC project has in adition to the core objectives shown how an industry lead programme is capable of promoting advances that would otherwise be dificult to achieve by individual organizations.