The effect of pile–soil interaction on structural dynamics is investigated for a large offshore wind turbine (OWT) in the hurricane-prone Western Gulf of Mexico (GOM) shallow water. The OWT has a rotor with three 100-meter blades and a monotower structure. Loads on the turbine rotor and the support structure subject to a 100-year return hurricane are determined. Several types of soil are considered and modeled with a distributed spring system. The results reveal that pile–soil interaction affects dynamics of the turbine support structure significantly, but not the rotor dynamics. Designed with proper pile lengths, natural frequencies of the turbine structure in different soils stay outside dominant frequencies of wave energy spectra in both normal operating and hurricane sea states, but stay between blade passing frequency intervals. Hence, potential resonance of the turbine support structure is not of concern. A comprehensive Campbell diagram is constructed for safe operation of the offshore turbine in different soils.

References

References
2.
Griffith
,
D. T.
, and
Ashwill
,
T. D.
,
2011
, “
The Sandia 100-Meter All-Glass Baseline Wind Turbine Blade: SNL100-00
,” Sandia National Laboratories, Albuquerque, NM, Technical Report No. SAND2011-3779, pp.
1
67
.
3.
De Vries
,
W.
,
2011
, “
Support Structure Concepts for Deep Water Sites
,” Delft University of Technology, Delft, The Netherlands, Technical Report No. UpWind Final Report WP4.2, pp.
167
187
.
4.
Corbetta
,
G.
,
Pineda
,
I.
, and
Moccia
,
J.
,
2014
, “
The European Offshore Wind Industry—Key Trends and Statistics 2013
,” European Wind Energy Association, Brussels, Belgium, EWEA Report, pp.
1
12
.
5.
Bir
,
G.
, and
Jonkman
,
J.
,
2008
, “
Modal Dynamics of Large Wind Turbines With Different Support Structures
,”
ASME
Paper No. OMAE2008-57446.
6.
Passon
,
P.
,
2006
, “
Derivation and Description of the Soil–Pile Interaction Models
,”
Memorandum, University of Stuttgart, Stuttgart, Germany
, pp.
1
9
.
7.
American Petroleum Institute
,
2000
,
Recommended Practice for Planning, Design and Constructing Fixed Offshore Platforms—Working Stress Design
,
API
,
Washington DC
, pp.
60
76
.
8.
Yin
,
L. L.
,
Lo
,
K. H.
, and
Wang
,
S. S.
,
2014
, “
Structural Dynamics and Load Analysis of Large Offshore Wind Turbines in Western Gulf of Mexico Shallow Water
,”
ASME
Paper No. OMAE2014-24258.
9.
De Vries
,
W. E.
, and
Krolis
,
V. D.
,
2007
, “
Effects of Deep Water on Monopile Support Structures for Offshore Wind Turbines
,”
European Wind Energy Conference
, Milan, Italy, pp.
1
10
.
10.
Lesny
,
K.
, and
Wiemann
,
J.
,
2006
, “
Finite-Element-Modelling of Large Diameter Monopiles for Offshore Wind Energy Converters
,”
GeoCongress 2006:
Geotechnical Engineering in the Information Technology Age
, Atlanta, GA, pp.
1
6
.
11.
Wang
,
S. T.
, and
Reese
,
L. C.
,
1993
, “
COM624P-Laterally Loaded Pile Analysis Program for the Microcomputer
,” Federal Highway Administration, Washington, D.C., Technical Report No. FHWA-SA-91-048, pp.
315
363
.
12.
American Petroleum Institute
,
2010
, “
Derivation of Metocean Design and Operating Conditions
,”
ISO 19901-1: 2004 Petroleum and Natural Gas Industries Specific Requirements for Offshore Structures Part 1: Metocean Design and Operating Considerations
,
1st ed.
,
API Recommended Practice 2MET
,
Washington, DC
, pp.
18
20
.
13.
International Electrotechnical Commission
,
2007
,
Wind Turbines Part 3: Design Requirements for Offshore Wind Turbines
,
IEC 61400-3
,
Geneva, Switzerland
, pp.
21
34
.
14.
Station 42035 (LLNR 1145)—GALVESTON, TX—22 NM East of Galveston, TX
,” http://www.ndbc.noaa.gov/station_page.php?station=42035
15.
Yin
,
L. L.
,
Lo
,
K. H.
, and
Wang
,
S. S.
,
2015
, “
Sizing Study and Loads Analysis for Large Offshore Wind Turbines in Western GOM Shallow Water
,” University of Houston, Houston, TX, Technical Report No. NWEC-TR-15-0101, pp.
1
35
.
16.
Bir
,
G.
,
2005
, “
User’s Guide to BModes (Software for Computing Rotating Beam Coupled Modes)
,” National Renewable Energy Laboratory, Golden, CO, Technical Report No. NREL/TP-500-39133, pp.
1
21
.
17.
Jonkman
,
J. M.
, and
Buhl
,
M. L.
, Jr.
,
2005
, “
FAST User’s Guide
,” National Renewable Energy Laboratory, Golden, CO, Technical Report No. NREL/TP-500-38230, pp.
1
143
.
18.
Yin
,
L. L.
,
Lo
,
K. H.
, and
Wang
,
S. S.
,
2015
, “
Blade Pitch and Rotor Yaw, and Wind-Wave Misalignment on Large Offshore Wind Turbine Dynamics in Western Gulf of Mexico Shallow Water in 100-Year Return Hurricane
,” University of Houston, Houston, TX, Technical Report No. NWEC-TR-15-0102, pp.
1
36
.
20.
Manwell
,
J. F.
,
McGowan
,
J. G.
, and
Rogers
,
A. L.
,
2010
,
Wind Energy Explained Theory, Design and Application
,
2nd ed.
,
Wiley
,
West Sussex, UK
, pp.
325
333
.
21.
Bir
,
G.
, and
Jonkman
,
J. M.
,
2007
, “
Aeroelastic Instabilities of Large Offshore and Onshore Wind Turbines
,” National Renewable Energy Laboratory, Golden, CO, Technical Report No. NREL/TP-500-41804, pp.
1
22
.
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