Transient Response Estimation of an Offshore Wind Turbine Support System
To obtain reliable estimations of the dynamic responses of high-rising marine structures such as offshore wind turbines with obvious nonzero initial conditions, traditional frequency-domain methods cannot be employed because they provide only steady-state results. A novel frequency-domain transient...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/12/5/891 |
| _version_ | 1811307412851785728 |
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| author | Fushun Liu Xingguo Li Zhe Tian Jianhua Zhang Bin Wang |
| author_facet | Fushun Liu Xingguo Li Zhe Tian Jianhua Zhang Bin Wang |
| author_sort | Fushun Liu |
| collection | DOAJ |
| description | To obtain reliable estimations of the dynamic responses of high-rising marine structures such as offshore wind turbines with obvious nonzero initial conditions, traditional frequency-domain methods cannot be employed because they provide only steady-state results. A novel frequency-domain transient response estimation method for offshore wind turbines is presented in this paper. This method builds upon a recent, significant theoretical development, which found that expressions of external loads in the frequency domain can be obtained by discretizing their eigenvalues and corresponding complex coefficients rather than directly by discrete Fourier transform (DFT) analysis, which makes it possible to deal with nonzero conditions in the frequency domain. One engineering advantage of this approach is its computational efficiency, as the motion equations of the system can be solved in the frequency domain. In order to demonstrate this approach, a case of a monopile-supported wind turbine with nonzero initial conditions was investigated. The numerical results indicate that the approach matches well with the time-domain method, except for a small, earlier portion of the estimated responses. A second case study of a sophisticated, jacket support wind turbine, involving practical issues such as complex external loads and computation efficiency, is also discussed, and comparisons of the results with the time-domain method and traditional frequency-domain method using the commercial software ANSYS are included here. |
| first_indexed | 2024-04-13T09:03:54Z |
| format | Article |
| id | doaj.art-fbecdab9bbe0417e837f018919930664 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T09:03:54Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-fbecdab9bbe0417e837f0189199306642022-12-22T02:53:03ZengMDPI AGEnergies1996-10732019-03-0112589110.3390/en12050891en12050891Transient Response Estimation of an Offshore Wind Turbine Support SystemFushun Liu0Xingguo Li1Zhe Tian2Jianhua Zhang3Bin Wang4College of Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaPowerchina Huadong Engineering Corporation Limited, Hangzhou 311122, ChinaTo obtain reliable estimations of the dynamic responses of high-rising marine structures such as offshore wind turbines with obvious nonzero initial conditions, traditional frequency-domain methods cannot be employed because they provide only steady-state results. A novel frequency-domain transient response estimation method for offshore wind turbines is presented in this paper. This method builds upon a recent, significant theoretical development, which found that expressions of external loads in the frequency domain can be obtained by discretizing their eigenvalues and corresponding complex coefficients rather than directly by discrete Fourier transform (DFT) analysis, which makes it possible to deal with nonzero conditions in the frequency domain. One engineering advantage of this approach is its computational efficiency, as the motion equations of the system can be solved in the frequency domain. In order to demonstrate this approach, a case of a monopile-supported wind turbine with nonzero initial conditions was investigated. The numerical results indicate that the approach matches well with the time-domain method, except for a small, earlier portion of the estimated responses. A second case study of a sophisticated, jacket support wind turbine, involving practical issues such as complex external loads and computation efficiency, is also discussed, and comparisons of the results with the time-domain method and traditional frequency-domain method using the commercial software ANSYS are included here.http://www.mdpi.com/1996-1073/12/5/891initial conditionfrequency domaintransient response estimationsupport structureoffshore wind turbine |
| spellingShingle | Fushun Liu Xingguo Li Zhe Tian Jianhua Zhang Bin Wang Transient Response Estimation of an Offshore Wind Turbine Support System Energies initial condition frequency domain transient response estimation support structure offshore wind turbine |
| title | Transient Response Estimation of an Offshore Wind Turbine Support System |
| title_full | Transient Response Estimation of an Offshore Wind Turbine Support System |
| title_fullStr | Transient Response Estimation of an Offshore Wind Turbine Support System |
| title_full_unstemmed | Transient Response Estimation of an Offshore Wind Turbine Support System |
| title_short | Transient Response Estimation of an Offshore Wind Turbine Support System |
| title_sort | transient response estimation of an offshore wind turbine support system |
| topic | initial condition frequency domain transient response estimation support structure offshore wind turbine |
| url | http://www.mdpi.com/1996-1073/12/5/891 |
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