TY - GEN
T1 - Effects of a multi-directional loading sequence on offshore wind turbine natural frequencies
AU - Lovera, A.
AU - Ghabezloo, S.
AU - Sulem, J.
AU - Randolph, M. F.
AU - Kham, M.
AU - Palix, E.
N1 - Publisher Copyright:
© The authors and IGS: All rights reserved, 2019.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The evaluation of the natural frequencies of offshore wind turbines is a key design criterion. It is commonly based on the definition of a macro-element representing the response of the foundation which is assessed on the basis of the P-y curves approach for laterally loaded pile. The existing framework of P-y curve formulation is limited to a single direction of loading. However, for offshore wind turbines the directions of the lateral loads may vary due to the effects of wind and waves. Based on a recent extension of the P-y curves framework proposed by the authors, the impact of multi-directional loading on natural frequency analysis of an offshore wind turbine with a monopile as foundation is studied. It is shown that a loading-sequence with multi-directional loading may lead to a decrease of natural frequencies of around 3-5 % depending on the orientation of successive loadings.
AB - The evaluation of the natural frequencies of offshore wind turbines is a key design criterion. It is commonly based on the definition of a macro-element representing the response of the foundation which is assessed on the basis of the P-y curves approach for laterally loaded pile. The existing framework of P-y curve formulation is limited to a single direction of loading. However, for offshore wind turbines the directions of the lateral loads may vary due to the effects of wind and waves. Based on a recent extension of the P-y curves framework proposed by the authors, the impact of multi-directional loading on natural frequency analysis of an offshore wind turbine with a monopile as foundation is studied. It is shown that a loading-sequence with multi-directional loading may lead to a decrease of natural frequencies of around 3-5 % depending on the orientation of successive loadings.
KW - Laterally loaded pile
KW - Multi-directional loading
KW - P-y curves
KW - Windmills
UR - https://www.scopus.com/pages/publications/85147548927
U2 - 10.32075/17ECSMGE-2019-1005
DO - 10.32075/17ECSMGE-2019-1005
M3 - Conference contribution
AN - SCOPUS:85147548927
T3 - 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
BT - 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
A2 - Sigursteinsson, Haraldur
A2 - Erlingsson, Sigurour
A2 - Erlingsson, Sigurour
A2 - Bessason, Bjarni
PB - International Society for Soil Mechanics and Geotechnical Engineering
T2 - 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019
Y2 - 1 September 2019 through 6 September 2019
ER -