为了有效降低海上风电结构的建设成本,对风电结构连接上部风机塔筒与下部基础结构的过渡段结构的优化设计方法进行研究。调研已应用于实际海上桁架式风电结构的过渡段型式,总结过渡段结构设计原则。基于这些设计原则,结合目前国内外海...为了有效降低海上风电结构的建设成本,对风电结构连接上部风机塔筒与下部基础结构的过渡段结构的优化设计方法进行研究。调研已应用于实际海上桁架式风电结构的过渡段型式,总结过渡段结构设计原则。基于这些设计原则,结合目前国内外海上风电结构常用装机功率,提出适用于4 MW to 5 MW装机功率风电系统过渡段的拓扑形式,并对影响过渡段结构性能的各拓扑参数进行优化,得到的设计和优化方法可为4 MW to 5 MW装机功率桁架式风电结构过渡段拓扑形式的确定提供借鉴与参考。展开更多
The dynamic characteristics and structural responses of operation and grid loss offshore wind turbines(OWTs)under onshore and seafloor earthquakes are analyzed based on the established coupled seismic analysis model.I...The dynamic characteristics and structural responses of operation and grid loss offshore wind turbines(OWTs)under onshore and seafloor earthquakes are analyzed based on the established coupled seismic analysis model.In addition to the remarkable influence of the rotor system on the responses of the operation OWT under earthquakes,interactions among the natural modes of the grid loss OWT in the fore-aft and side-to-side directions are revealed.By comparing with the onshore earthquakes,the more significant differences of structural response are observed under the selected seafloor earthquakes,due to the longer duration and more abundant energy distribution around the natural frequencies of OWT.Concurrently,a multiple tuned mass damper(MTMD)is designed and applied to the operation and grid loss OWTs.Then,the comparisons of the mitigation effects under onshore and seafloor ground motions are carried out,and the necessity of applying seafloor ground motions to OWTs are proved.Moreover,in comparison to the operation OWT,more effective reductions are observed for the grid loss OWT under onshore and seafloor earthquakes using the designed MTMD.Therefore,the combined shutdown procedures and MTMD vibration control strategy is suggested for OWTs under earthquakes.展开更多
文摘为了有效降低海上风电结构的建设成本,对风电结构连接上部风机塔筒与下部基础结构的过渡段结构的优化设计方法进行研究。调研已应用于实际海上桁架式风电结构的过渡段型式,总结过渡段结构设计原则。基于这些设计原则,结合目前国内外海上风电结构常用装机功率,提出适用于4 MW to 5 MW装机功率风电系统过渡段的拓扑形式,并对影响过渡段结构性能的各拓扑参数进行优化,得到的设计和优化方法可为4 MW to 5 MW装机功率桁架式风电结构过渡段拓扑形式的确定提供借鉴与参考。
基金National Natural Science Foundation of China under Grant Nos.52001052 and 51939002。
文摘The dynamic characteristics and structural responses of operation and grid loss offshore wind turbines(OWTs)under onshore and seafloor earthquakes are analyzed based on the established coupled seismic analysis model.In addition to the remarkable influence of the rotor system on the responses of the operation OWT under earthquakes,interactions among the natural modes of the grid loss OWT in the fore-aft and side-to-side directions are revealed.By comparing with the onshore earthquakes,the more significant differences of structural response are observed under the selected seafloor earthquakes,due to the longer duration and more abundant energy distribution around the natural frequencies of OWT.Concurrently,a multiple tuned mass damper(MTMD)is designed and applied to the operation and grid loss OWTs.Then,the comparisons of the mitigation effects under onshore and seafloor ground motions are carried out,and the necessity of applying seafloor ground motions to OWTs are proved.Moreover,in comparison to the operation OWT,more effective reductions are observed for the grid loss OWT under onshore and seafloor earthquakes using the designed MTMD.Therefore,the combined shutdown procedures and MTMD vibration control strategy is suggested for OWTs under earthquakes.