Reliability analysis of offshore wind turbine foundations under lateral cyclic loading

Gianluca Zorzi*, Amol Mankar, Joey Velarde, John Dalsgaard Sørensen, Patrick Arnold, Fabian Kirsch

*Kontaktforfatter

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The design of foundations for offshore wind turbines (OWT) requires the assessment of the long-term performance of the soil-structure-interaction (SSI) which is subjected to a large number of cyclic loadings. In terms of serviceability limit state (SLS), it has to be ensured that the foundation does not exceed the operational tolerance prescribed by the wind turbine manufacturer throughout its lifetime. This work aims at developing a probabilistic approach along with a reliability framework with emphasis on verifying the SLS criteria in terms of maximum allowable rotation during an extreme cyclic loading event. This reliability framework allows the quantification of uncertainties in soil properties, in the constitutive soil model for cyclic loadings and extreme environmental conditions and verifies that the foundation design meets a specific target reliability level. A 3D finite element (FE) model is used to predict the long-term response of the SSI accounting for the accumulation of permanent cyclic strain experienced by the soil. The proposed framework is employed for the design of a large diameter monopile supporting a 10 MW offshore wind turbine.
OriginalsprogEngelsk
TidsskriftWind Energy Science
ISSN2366-7443
StatusAfsendt - 20 aug. 2019

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Offshore wind turbines
Reliability analysis
Soil structure interactions
Soils
Wind turbines

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title = "Reliability analysis of offshore wind turbine foundations under lateral cyclic loading",
abstract = "The design of foundations for offshore wind turbines (OWT) requires the assessment of the long-term performance of the soil-structure-interaction (SSI) which is subjected to a large number of cyclic loadings. In terms of serviceability limit state (SLS), it has to be ensured that the foundation does not exceed the operational tolerance prescribed by the wind turbine manufacturer throughout its lifetime. This work aims at developing a probabilistic approach along with a reliability framework with emphasis on verifying the SLS criteria in terms of maximum allowable rotation during an extreme cyclic loading event. This reliability framework allows the quantification of uncertainties in soil properties, in the constitutive soil model for cyclic loadings and extreme environmental conditions and verifies that the foundation design meets a specific target reliability level. A 3D finite element (FE) model is used to predict the long-term response of the SSI accounting for the accumulation of permanent cyclic strain experienced by the soil. The proposed framework is employed for the design of a large diameter monopile supporting a 10 MW offshore wind turbine.",
keywords = "Wind Turbine Foundations, Lateral cyclic loading, Reliability Analysis, Offshore Wind Turbine (OWT)",
author = "Gianluca Zorzi and Amol Mankar and Joey Velarde and S{\o}rensen, {John Dalsgaard} and Patrick Arnold and Fabian Kirsch",
year = "2019",
month = "8",
day = "20",
language = "English",
journal = "Wind Energy Science",
issn = "2366-7443",
publisher = "Copernicus GmbH",

}

Reliability analysis of offshore wind turbine foundations under lateral cyclic loading. / Zorzi, Gianluca; Mankar, Amol; Velarde, Joey; Sørensen, John Dalsgaard; Arnold, Patrick; Kirsch, Fabian.

I: Wind Energy Science, 20.08.2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Reliability analysis of offshore wind turbine foundations under lateral cyclic loading

AU - Zorzi, Gianluca

AU - Mankar, Amol

AU - Velarde, Joey

AU - Sørensen, John Dalsgaard

AU - Arnold, Patrick

AU - Kirsch, Fabian

PY - 2019/8/20

Y1 - 2019/8/20

N2 - The design of foundations for offshore wind turbines (OWT) requires the assessment of the long-term performance of the soil-structure-interaction (SSI) which is subjected to a large number of cyclic loadings. In terms of serviceability limit state (SLS), it has to be ensured that the foundation does not exceed the operational tolerance prescribed by the wind turbine manufacturer throughout its lifetime. This work aims at developing a probabilistic approach along with a reliability framework with emphasis on verifying the SLS criteria in terms of maximum allowable rotation during an extreme cyclic loading event. This reliability framework allows the quantification of uncertainties in soil properties, in the constitutive soil model for cyclic loadings and extreme environmental conditions and verifies that the foundation design meets a specific target reliability level. A 3D finite element (FE) model is used to predict the long-term response of the SSI accounting for the accumulation of permanent cyclic strain experienced by the soil. The proposed framework is employed for the design of a large diameter monopile supporting a 10 MW offshore wind turbine.

AB - The design of foundations for offshore wind turbines (OWT) requires the assessment of the long-term performance of the soil-structure-interaction (SSI) which is subjected to a large number of cyclic loadings. In terms of serviceability limit state (SLS), it has to be ensured that the foundation does not exceed the operational tolerance prescribed by the wind turbine manufacturer throughout its lifetime. This work aims at developing a probabilistic approach along with a reliability framework with emphasis on verifying the SLS criteria in terms of maximum allowable rotation during an extreme cyclic loading event. This reliability framework allows the quantification of uncertainties in soil properties, in the constitutive soil model for cyclic loadings and extreme environmental conditions and verifies that the foundation design meets a specific target reliability level. A 3D finite element (FE) model is used to predict the long-term response of the SSI accounting for the accumulation of permanent cyclic strain experienced by the soil. The proposed framework is employed for the design of a large diameter monopile supporting a 10 MW offshore wind turbine.

KW - Wind Turbine Foundations

KW - Lateral cyclic loading

KW - Reliability Analysis

KW - Offshore Wind Turbine (OWT)

M3 - Journal article

JO - Wind Energy Science

JF - Wind Energy Science

SN - 2366-7443

ER -