centrifuge modelling of monopiles for offshore wind turbines...dtu civil engineering, technical...
TRANSCRIPT
![Page 1: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/1.jpg)
Centrifuge modelling of monopiles for offshore wind turbines
![Page 2: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/2.jpg)
DTU Civil Engineering, Technical University of Denmark
Monopile
06/10/2011Ph.D projekt af Rasmus T. Klinkvort 2009-20122
(http://www.ramboll-wind.com/, 2010)(http://www.dongenergy.com ,2010) (Byrne & Houlsby, 2006)
![Page 3: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/3.jpg)
DTU Civil Engineering, Technical University of Denmark
Research method
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20123
Prototype model
Numerical model
Scaled model
Constitutive law
Scaling law
Calibration&
Verification
![Page 4: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/4.jpg)
DTU Civil Engineering, Technical University of Denmark
Research method
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20124
Prototype model
Numerical model
Scaled model
Constitutive law
Scaling law
Calibration&
Verification
![Page 5: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/5.jpg)
DTU Civil Engineering, Technical University of Denmark
Dimensional analysis of a laterally loaded pile in sand
• For a laterally loaded pile
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20125
( )
=
==
',,,,'
),,,,,,,(',',,,,,,
503
87654321
50
ϕγ
ππππππππϕγ
dd
dL
de
duf
dH
fFdLeduHfF
![Page 6: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/6.jpg)
DTU Civil Engineering, Technical University of Denmark
Centrifuge modelling
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20126
![Page 7: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/7.jpg)
DTU Civil Engineering, Technical University of Denmark
Centrifuge modelling
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20127
Scale effect – Modelling of models
![Page 8: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/8.jpg)
DTU Civil Engineering, Technical University of Denmark
Scale effect
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20128
![Page 9: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/9.jpg)
DTU Civil Engineering, Technical University of Denmark
Installation effect
06/10/2011Ph.D project by Rasmus Klinkvort 2009-20129
![Page 10: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/10.jpg)
DTU Civil Engineering, Technical University of Denmark
Non-Linear stress distribution
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201210
![Page 11: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/11.jpg)
DTU Civil Engineering, Technical University of Denmark
The non-linear stress distribution effect
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201211
![Page 12: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/12.jpg)
DTU Civil Engineering, Technical University of Denmark
Centrifuge modelling
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201212
Stress level effect
![Page 13: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/13.jpg)
DTU Civil Engineering, Technical University of Denmark
Stress level effect
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201213
![Page 14: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/14.jpg)
DTU Civil Engineering, Technical University of Denmark
Stress level effect
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201214
![Page 15: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/15.jpg)
DTU Civil Engineering, Technical University of Denmark
Modelling technique
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201215
Prototype model
Numerical model
Scaled model
Constitutive model
Scaling laws
Calibration&
Verification
![Page 16: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/16.jpg)
DTU Civil Engineering, Technical University of Denmark
Monotonic tests e=15d, L=6d & d=1-?m
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201216
![Page 17: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/17.jpg)
DTU Civil Engineering, Technical University of Denmark
Monotonic tests e=8.25d, L=6d & d=1-?m
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201217
![Page 18: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/18.jpg)
DTU Civil Engineering, Technical University of Denmark 06/10/2011Ph.D project by Rasmus Klinkvort 2009-201218
![Page 19: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/19.jpg)
DTU Civil Engineering, Technical University of Denmark
Cyclic loading of monopile
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201219
![Page 20: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/20.jpg)
DTU Civil Engineering, Technical University of Denmark
Cyclic loading of monopile ζb=0.35, ζc=-0.5
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201220
![Page 21: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/21.jpg)
DTU Civil Engineering, Technical University of Denmark
Accumulation of deflection – 10 000 cycles
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201221
1000 cycles capture the trend
Fatique limit state 107
cycles
![Page 22: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/22.jpg)
DTU Civil Engineering, Technical University of Denmark
Cyclic p-y curves, e=15d, L=6d & d=1-?m
06/10/2011Ph.D project by Rasmus Klinkvort 2009-201222
![Page 23: Centrifuge modelling of monopiles for offshore wind turbines...DTU Civil Engineering, Technical University of Denmark Cyclic loading of monopile ζ b =0.35, ζ c =-0.5 20 Ph.D project](https://reader035.vdocuments.us/reader035/viewer/2022081620/6119202163a98a3c333043fc/html5/thumbnails/23.jpg)
06/10/201123 Ph.D project by Rasmus T. Klinkvort 2009-2012
ConclusionsCentrifuge modelling of monopiles: Stress distribution Load eccentricity/Pentration depth... Development of initial subgrade reaction÷ Diameter effect÷ (Size of Stiffness)
Cyclic tests: Accumulation of deflection/rotations Increase in stiffness Damping in the soil÷ Accumulation of porepresure