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| Dynamic Responses Analysis of DTU 10 MW Monopile-supported Offshore Wind Turbine under Ship Impact |
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| DOI：10.7643/issn.1672-9242.2023.06.013 |
| KeyWord:offshore wind turbine monopile-supported ship impact dynamic responses wind load effect finite element |
| Author | Institution |
| WU Teng-fei |
Shanghai Energy Technology Development Co., Ltd., Shanghai , China |
| HUANG Yong |
Shanghai Energy Technology Development Co., Ltd., Shanghai , China |
| SONG Qian-wen |
Institute of Earthquake Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Liaoning Dalian , China |
| ZHAO Hai-sheng |
Institute of Earthquake Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Liaoning Dalian , China |
| LI Xin |
Institute of Earthquake Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Liaoning Dalian , China |
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| Abstract: |
| The work aims to investigate the dynamic responses of offshore wind turbine impacted by a ship and the failure modes under different operating conditions. SACS software was used to establish a dynamic analysis model of the DTU 10 MW monopole-supported offshore wind turbine and p-y curve was adopted to simulate the pile-soil interaction. The dynamic responses of the offshore wind turbine were calculated under different impact speed, impact angles and wind load directions, and the failure modes of the wind turbine under shutdown and operating conditions were investigated. The maximum nacelle acceleration and tower top displacement of the wind turbine under wind load increased by 8.5% and 68.1%, respectively, compared with those under no wind load. With 5 000 t impact ship as an example, under the shutdown condition, the wind turbine suffered failure caused by nacelle failure when the impact speed exceeded 2.13 m/s. However, under the operating condition, the wind turbine suffered failure caused by the deflection exceeding the maximum allowable value for the impact speed exceeding 1.88 m/s. There is no obvious difference between the acceleration responses of the nacelle under the conditions with and without wind load, while the tower top displacement under wind load increases significantly compared with that under no wind load. Finally, the critical values of impact speed are proposed according to the failure modes of the offshore wind turbine in shutdown and operating conditions. |
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