Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine
The finite element discretization of a tower system based on the two-node Euler-Bernoulli beam is carried out by taking the cubic Hermite polynomial as the form function of the beam unit, calculating the structural characteristic matrix of the tower system, and establishing the wind turbine-nacelle-...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/19/8876 |
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| author | Junbo Hao Zedong Wang Wenwu Yi Yan Chen Jiyao Chen |
| author_facet | Junbo Hao Zedong Wang Wenwu Yi Yan Chen Jiyao Chen |
| author_sort | Junbo Hao |
| collection | DOAJ |
| description | The finite element discretization of a tower system based on the two-node Euler-Bernoulli beam is carried out by taking the cubic Hermite polynomial as the form function of the beam unit, calculating the structural characteristic matrix of the tower system, and establishing the wind turbine-nacelle-tower multi-degree-of-freedom finite element numerical model. The equation for calculating the aerodynamic load for any nacelle attitude angle is derived. The effect of the flexible tower vibration feedback on the aerodynamic load of the wind turbine is studied. The results show that, when the stiffness of the tower is large, the effect of having tower vibration feedback or not on the aeroelastic load of the wind turbine is small. For the more flexible tower system, wind-induced vibration time-varying feedback will cause larger aeroelastic load variations, especially the top of the tower overturning moment, thus causing a larger impact on the dynamic behavior of the tower downwind and crosswind. As the flexibility of the tower system increases, the interaction between tower vibration and pneumatic load is also gradually increasing. Taking into account the influence of flexible towers on the aeroelastic load of a wind turbine can help predict the pneumatic load of a wind turbine more accurately and improve the efficiency of wind energy utilization on the one hand and analyze the dynamic behavior of the flexible structure of a wind turbine more accurately on the other hand, which is extremely beneficial to the structural optimization of wind turbine. |
| first_indexed | 2024-03-10T07:06:47Z |
| format | Article |
| id | doaj.art-73925ac32d8446afb61fbb9fdbe052b5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T07:06:47Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-73925ac32d8446afb61fbb9fdbe052b52023-11-22T15:44:17ZengMDPI AGApplied Sciences2076-34172021-09-011119887610.3390/app11198876Influence of the Flexible Tower on Aeroelastic Loads of the Wind TurbineJunbo Hao0Zedong Wang1Wenwu Yi2Yan Chen3Jiyao Chen4Institute of Energy and Environmental Science, Shantou University, Shantou 515063, ChinaInstitute of Energy and Environmental Science, Shantou University, Shantou 515063, ChinaInstitute of Energy and Environmental Science, Shantou University, Shantou 515063, ChinaInstitute of Energy and Environmental Science, Shantou University, Shantou 515063, ChinaInstitute of Energy and Environmental Science, Shantou University, Shantou 515063, ChinaThe finite element discretization of a tower system based on the two-node Euler-Bernoulli beam is carried out by taking the cubic Hermite polynomial as the form function of the beam unit, calculating the structural characteristic matrix of the tower system, and establishing the wind turbine-nacelle-tower multi-degree-of-freedom finite element numerical model. The equation for calculating the aerodynamic load for any nacelle attitude angle is derived. The effect of the flexible tower vibration feedback on the aerodynamic load of the wind turbine is studied. The results show that, when the stiffness of the tower is large, the effect of having tower vibration feedback or not on the aeroelastic load of the wind turbine is small. For the more flexible tower system, wind-induced vibration time-varying feedback will cause larger aeroelastic load variations, especially the top of the tower overturning moment, thus causing a larger impact on the dynamic behavior of the tower downwind and crosswind. As the flexibility of the tower system increases, the interaction between tower vibration and pneumatic load is also gradually increasing. Taking into account the influence of flexible towers on the aeroelastic load of a wind turbine can help predict the pneumatic load of a wind turbine more accurately and improve the efficiency of wind energy utilization on the one hand and analyze the dynamic behavior of the flexible structure of a wind turbine more accurately on the other hand, which is extremely beneficial to the structural optimization of wind turbine.https://www.mdpi.com/2076-3417/11/19/8876flexible towernacelle attitude feedback (NAF)dynamic responseaerodynamic load |
| spellingShingle | Junbo Hao Zedong Wang Wenwu Yi Yan Chen Jiyao Chen Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine Applied Sciences flexible tower nacelle attitude feedback (NAF) dynamic response aerodynamic load |
| title | Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine |
| title_full | Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine |
| title_fullStr | Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine |
| title_full_unstemmed | Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine |
| title_short | Influence of the Flexible Tower on Aeroelastic Loads of the Wind Turbine |
| title_sort | influence of the flexible tower on aeroelastic loads of the wind turbine |
| topic | flexible tower nacelle attitude feedback (NAF) dynamic response aerodynamic load |
| url | https://www.mdpi.com/2076-3417/11/19/8876 |
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