Transcript Dias nummer 1 - Aalborg Universitet

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The Universal Foundation Concept
Søren A. Nielsen, MBD, Project Manager
Lars Bo Ibsen, Aalborg University, Research Professor
MBD, brief introduction
Development approach
Projects
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The bucket foundation
NearshoreLAB
Development of UFC
Concept philosophy
Basic structure
Stakeholders
Development
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MBD Offshore Power A/S
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R&D company founded in 2001
Present shareholders:
* DONG Energy, >50%
* MarCon
* Novasion
Subsidiaries:
* NearshoreLAB A/S, DONG Energy 91 %
Primary cooperation:
* Aalborg University
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The challenges
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The project development approach
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Development approach
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Industrialized product development
Project development  development projects
• Focus on total supply chain
• Coordinated R&D in each link of the supply chain
• Active use of feedback
Technology transfer
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• is not only using a product in a different location
• it is adapting technology to new physical environment
• it is adapting the organisation culture
• it is adapting the knowledge and education
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Development approach
Projects versus industry in the offshore wind business
Owner
Consultant
Construc
-tion
Installati
on
Feedback
Feedback
Feedback
Feedback
Project development
Engineering
Production
Installation
Feedback Development
Industrial development
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Sales
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Barriers for new offshore technology
Lag of focus on technology transfer, understanding of the scope
References, track record
Large scale demonstrations (few pieces, not whole parks)
Handling of risk issues
Off cause there is always a small risk
when you participate in experimental
tooth cleaning, but remember, the
treatment is a free offer......!
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Projects: The prototype for Pos. 1, Frederikshavn
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The Ø12x6 m prototype bucket foundation was designed for a Vestas V90 3MW turbine
placed on 4 m of water. The design is certified by DNV. The bucket was installed in late
2002 and is in normal operation. The structure/soil interaction has been investigated
with sophisticated modal analyse equipment.
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Projects: The prototype for Wilhelmshaven E-112
4,5 MW turbine positioned 500 m of the coast outside Hochsiel oil installation
Water depth: 4 m. Load regime: Moment > 300.000 kNm, vertical load > 11000 kN,
horizontal load > 5000 kN, foundation weight app. 400 tons.
Installation April 2005.
Try and error. Our conclusion: The installation was jeopardized by a impact of the auxiliary vessel during operation
outside the predicted wind window.
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Learning: Plans and procedures to be followed
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Projects:
The
test site, Frederikshavn
NearshoreLAB
25 MW, 5 km of the
coast
Demonstration of:
6 different ”0-series”
turbines
6 different foundation
concepts
Cabling
Scour protection
Access systems
Approval for construction: June 2008
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Power system
adaptation
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UFC philosophy, a framework for project development
The UFC is a concurrent process,
adding new processes and experiences to a database,
used by a configuration methodology
to produce the required documentation
in each step of the wind farm projects focusing on:
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• The optimal foundation for each turbine position
• Design is parameter driven
• Structure based on scaleable modules and elements
• Production based on series or mass production
• Installation in widest possible weather window
• Installation based on common available vessels
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The UFC framework
Database
Configurator
Standard
output
procedures,
expirences
Conseptual
design
Tender design
Detail design
Construction
documentation
Operation
documentation
Feed back
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Site
data
methodes,
Risk / cost assesment
Principles,
Product configuration
Feasibility
studies
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Offshore wind turbine foundations
The flexibility of the
bucket foundation
gives wider range of
application.
Sites with complex
geotechnical
properties can be
cover by a single
foundation concept
Bucket
Mono pile
Tripod
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Platform
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UFC basic foundation principle
A: Gravitation
B: Bucket
C: Monopile
Diameter
Diameter
Diameter
Dead load
Skirt lenght
Length
Dead load
Tower cone angel
Foundation depth
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Design
parameter
variation
The bucket foundation (B) is a hybrid combining features from
the gravitation platform (A) and the mono pile (C)
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Bucket foundation
Main objectives
• Cost reduction,
reduction of steel consumption, rational
production, smaller installation equipment,
reduction of load regime.
• Risk management,
availability of vessels, weather window,
seabed condition.
• Going from “one off” offshore
construction to industrialized product,
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optimised design at each position, parameter driven design, standardized
construction elements, standardized installation procedures.
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Bucket size variations
10 m
20 m
30 m
40 m
12x12 m
13x13 m
14x14 m
15x15 m
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Different
foundation depth
with the same
wind turbine load.
1:1 buckets
increases load
taking with
(D=diameter) 4.
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Bucket size variations
Different penetration
depth due to soil
condition with the
same wind turbine
load.
Uniform soil
18 x 9 m
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14 x 14 m
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UFC development
Stakeholders / network
• AaU: Research professor, 4 Ph.D.s
• NearshoreLAB
• DONG Energy
• Wind turbine industry
• Construction industry
• Certifying parties
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• Consultants
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UFC development projects
Status
Design methodology for bucket foundations, 2001-2002
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Prototype reference bucket Frederikshavn, 2002
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Prototype reference bucket, Wilhelmshaven 2005
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Soil/structure interaction I, integration in FLEX5 / HAWC2
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Scour protection in connection with bucket foundations
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Dynamic behaviour of suction caissons, Ph. D Thesis 2003 - 2007
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Static behaviour of bucket foundations, Ph.D. Thesis 2003 - 2007
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Soil/structure interaction II, large diameter mono piles 2007 - 2009
On going
Physical & numerical modelling of mono piles in silt Ph.D. 2007 – 2010
On going
Offshore installation with Mobile Met Mast bucket foundation,
NearshoreLAB, Horns Rev II, UK sites, 2008
On going
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Description
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UFC development projects
Description
Status
Full scale demonstration bucket i NearshoreLAB, 2008/2009
Application
UFC system development, Ph.D. 2008-2010
Planning
High tension concrete composite in support structures, Ph.D. 2008 - 2010
Planning
Scour protection dynamics, Ph.D. 2008-2010
Planning
Advanced probabilistic geotechnical site assessment , 2008 - 2010
Application
Probabilistically modelling of offshore wind farm foundations, 2008 - 2010
Application
Planning
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Geotechnical site investigation with mobile bucket foundation, 2008
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Future UFC development projects
• Transport and installation system
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• Scanning of penetration path for objects , e.g. stoner, boulders
• Penetration methods in harder soil and soil anchors
• Main foundation structures in high tension concrete composite
• Sub structures in industrialized design
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Thank you for your attention