Conference programme

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Delegates are invited to meet and discuss with the poster presenters during the poster presentation sessions between 10:30-11:30 and 16:00-17:00 on Thursday, 19 November 2015.

Lead Session Chair:
Stephan Barth, ForWind - Center for Wind Energy Research, Germany
Morten Søgaard Andersen DNV GL, Denmark
Co-authors:
Morten Søgaard Andersen (1) F
(1) DNV GL, Hellerup, Denmark

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Presenter's biography

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

Morten Søgaard Andersen has worked for 12 years with DNV GL and has a total of 18 years of professional experience working with support structures for wind turbines and bridge structures. He has high expertise in structural analysis of concrete and steel and is participating in the international committee for development of the IEC standard for wind turbine towers and foundations. His responsibilities in DNV GL include technical verifications, R&D work, development and maintenance of DNV GL’s standard for wind turbine support structures. Mr. Andersen holds a M.Sc. degree in Civil Engineering from the Technical University of Denmark.


Poster

Poster Download poster (9.21 MB)

Abstract

New DNV GL design standard for wind turbine support structures

Introduction

A number of DNV GL wind turbine standards are currently being developed for issue over the next couple of years and among these new standards is a new design standard for wind turbine support structures. The DNV GL standard for wind turbine support structures will be including state-of-the-art design rules, and it will cover design of wind turbine towers and foundation for both onshore and offshore use.

Approach

The new DNV GL standard for wind turbine support structures will be based on the GL-IV-1 and -2, DNV-OS-J101, and the DNV/Riso Guideline. Further, the new standards will include results from the latest available research together with knowledge gained from our many activities in wind turbine Type and Project Certification.

Main body of abstract

Technical standards lead the user to develop and improve their products and projects. Therefore the independent Certification Body DNV GL is putting a high effort into developing standards for wind turbines and other technologies. DNV GL is the merged company of DNV and Germanischer Lloyd and both former companies have for many years issued standards for wind turbines and these standards are being used as a starting point for developing the new DNV GL standards.

The new family of DNV GL standards will include separate standard for load analysis, blade design, support structure design etc. This is in order to facilitate even faster update of the individual standards when new knowledge is available. The new DNV GL standard for wind turbine support structures will be including state-of-the-art design rules, and it will cover design of wind turbine towers and foundation for both onshore and offshore use. Hence, it will cover design of steel structure and concrete structures together with geotechnical design and issues like design of steel and concrete towers and foundations, pile-sleeve grouted connection, suction buckets foundation and scour protection for offshore installations.

The new standard for wind turbine structures is being developed by DNV GL’s most experienced engineers and it will be issued ultimo 2015 at the same time as for example the new DNV GL standard for load analysis. An open industry hearing will take place in the autumn of 2015.

An overview over all issued and planned new DNV GL standards will be given together with a thorough introduction of the new standard for wind turbine support structures.

References:
GL-IV-1, Guideline for the Certification of Wind Turbines, Edition 2010
GL-IV-2, Guideline for the Certification of Offshore Wind Turbines, Edition 2012
DNV/Riso Guideline for Design of Wind Turbines, Second Edition, 2002
DNV-OS-J101, Design of Offshore Wind Turbine Structures, May 2014

Conclusion

All state-of-the-art knowledge regarding design of wind turbine support structures in the merged company DNV GL is being compiled into a new DNV GL standard. The new DNV GL standard for wind turbine support structure will offer pragmatic design approaches and can be used for example for design of steel and concrete towers, gravity based concrete foundations, together with steel foundations such as suction buckets foundation, monopile foundation, and jacket structure foundations.


Learning objectives
The audience will learn:
- Status of the development work on the DNV GL support structure standard.
- Main harmonization tasks for support structures related to legacy standards.
- Overview over new issues included based on research and lessons learned.
- Relations to national and international standards (like the future IEC 61400-6).
- Overview over all planned new DNV GL standards.