Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions
Accurate estimation of offshore wind turbine (OWT) modal parameters has a prominent effect on the design loads, lifetime prediction, and dynamic response of the system. Modal parameters can vary during the operation of OWTs. This paper studies the variation and sensitivity analysis of an OWT’s modal...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/8/1524 |
| _version_ | 1827729469743300608 |
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| author | Nasim Partovi-Mehr Emmanuel Branlard Mingming Song Babak Moaveni Eric M. Hines Amy Robertson |
| author_facet | Nasim Partovi-Mehr Emmanuel Branlard Mingming Song Babak Moaveni Eric M. Hines Amy Robertson |
| author_sort | Nasim Partovi-Mehr |
| collection | DOAJ |
| description | Accurate estimation of offshore wind turbine (OWT) modal parameters has a prominent effect on the design loads, lifetime prediction, and dynamic response of the system. Modal parameters can vary during the operation of OWTs. This paper studies the variation and sensitivity analysis of an OWT’s modal parameters with respect to operational and environmental conditions. Three finite element models of a jacket-supported OWT at the Block Island Wind Farm are created within the OpenSees, SAP2000, and OpenFAST platforms and validated using experimental measurements. The OpenFAST model is used to simulate the modal parameters of the turbine under various wind speed, rotor speed, power, yaw angle, mean sea level, blade pitch angle, and soil spring values. The model-predicted modal parameters of the first fore–aft (FA) and side–side (SS) modes are compared to those identified from experimental measurements. Results from the simulations show that the first FA natural frequency and damping ratio mostly depend on the rotor speed and wind speed, respectively, while yaw angle and mean sea level do not have a visible effect. It is observed that there is about 8% stiffening in the first FA frequency and an aerodynamic damping of 7.5% during the operation of the OWT. |
| first_indexed | 2024-03-10T23:49:16Z |
| format | Article |
| id | doaj.art-2ebed6b40e904ae19303a3e5d3749173 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T23:49:16Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-2ebed6b40e904ae19303a3e5d37491732023-11-19T01:45:16ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-07-01118152410.3390/jmse11081524Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational ConditionsNasim Partovi-Mehr0Emmanuel Branlard1Mingming Song2Babak Moaveni3Eric M. Hines4Amy Robertson5Department of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, USANational Renewable Energy Laboratory, Golden, CO 80401, USADepartment of Bridge Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, USADepartment of Civil and Environmental Engineering, Tufts University, Medford, MA 02155, USANational Renewable Energy Laboratory, Golden, CO 80401, USAAccurate estimation of offshore wind turbine (OWT) modal parameters has a prominent effect on the design loads, lifetime prediction, and dynamic response of the system. Modal parameters can vary during the operation of OWTs. This paper studies the variation and sensitivity analysis of an OWT’s modal parameters with respect to operational and environmental conditions. Three finite element models of a jacket-supported OWT at the Block Island Wind Farm are created within the OpenSees, SAP2000, and OpenFAST platforms and validated using experimental measurements. The OpenFAST model is used to simulate the modal parameters of the turbine under various wind speed, rotor speed, power, yaw angle, mean sea level, blade pitch angle, and soil spring values. The model-predicted modal parameters of the first fore–aft (FA) and side–side (SS) modes are compared to those identified from experimental measurements. Results from the simulations show that the first FA natural frequency and damping ratio mostly depend on the rotor speed and wind speed, respectively, while yaw angle and mean sea level do not have a visible effect. It is observed that there is about 8% stiffening in the first FA frequency and an aerodynamic damping of 7.5% during the operation of the OWT.https://www.mdpi.com/2077-1312/11/8/1524fixed-bottom offshore wind turbinejacket substructuremodal identificationmodal parameterssensitivity analysisCampbell diagram |
| spellingShingle | Nasim Partovi-Mehr Emmanuel Branlard Mingming Song Babak Moaveni Eric M. Hines Amy Robertson Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions Journal of Marine Science and Engineering fixed-bottom offshore wind turbine jacket substructure modal identification modal parameters sensitivity analysis Campbell diagram |
| title | Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions |
| title_full | Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions |
| title_fullStr | Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions |
| title_full_unstemmed | Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions |
| title_short | Sensitivity Analysis of Modal Parameters of a Jacket Offshore Wind Turbine to Operational Conditions |
| title_sort | sensitivity analysis of modal parameters of a jacket offshore wind turbine to operational conditions |
| topic | fixed-bottom offshore wind turbine jacket substructure modal identification modal parameters sensitivity analysis Campbell diagram |
| url | https://www.mdpi.com/2077-1312/11/8/1524 |
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