ANALYSIS & DESIGN OF STEEL WIND TURBINE TOWER UNDER COMBINED EFFECT OF WIND LOAD AND EARTHQUAKE
| creativework.keywords | Wind turbine tower, earthquake, wind load, | |
| dc.contributor.author | Negassi G/kidan | |
| dc.date.accessioned | 2025-07-31T12:50:14Z | |
| dc.date.issued | 2020-08-09 | |
| dc.identifier.uri | https://repository.mu.edu.et/handle/123456789/786 | |
| dc.identifier.uri | https://doi.org/10.82589/muir-697 | |
| dc.identifier.uri | https://doi.org/10.82589/muir-697 | |
| dc.identifier.uri | https://doi.org/10.82589/muir-697 | |
| dc.language.iso | en | |
| dc.publisher | Mekelle University | |
| dc.title | ANALYSIS & DESIGN OF STEEL WIND TURBINE TOWER UNDER COMBINED EFFECT OF WIND LOAD AND EARTHQUAKE | |
| dc.type | Thesis | |
| dcterms.abstract | Wind turbines are widely recognized as a renewable energy resource and as such, their safety and reliability must be ensured. Many studies have been completed on the blade rotor and nacelle components of wind turbines under wind and earth quake loads. While several studies have focused on idealized wind turbine models, significant advancements on the global and local performance of these models under seismic loads in combination with other loads has been lacking. A study on the evaluation and performance of realistic wind turbine models under wind and seismic loads is proposed and successfully completed. First, the geometry and loading for three wind turbine models are developed. A series of finite element analyses is conducted for each model under a variety of load combinations and earthquake records. Both global results and localized behavior were obtained for each analysis in order to identify areas of improvement within the wind turbine structure. Global results include drift ratios, normalized base shear and fast Fourier transformations to evaluate the stability of the wind turbine during operation. These results show that certain turbine models are more susceptible to these loads than others. Several analyses indicate yielding at the turbine base and resonant conditions. The results from these analyses identify several critical issues within the wind turbine design and operation protocol. |