采用线性耦合弹簧模拟风力机桩基础柔性,基于时域整体耦合分析方法,建立考虑桩基础柔性的海上风力机-调谐液柱阻尼器（TLCD）的耦合数值仿真模型,开展风浪联合作用下固定式海上风力机结构振动控制研究,探讨TLCD对于减振效果的影响,并结合频域响应揭示了TLCD的减振机理。研究表明,所设计TLCD通过调谐支撑结构一阶模态有效降低了固定式海上风力机结构自由衰减时程和耦合运动响应。与此同时,验证了不同设计工况下海上风力结构减振效果的差异,以及环境荷载与海上风力结构耦合效应对于TLCD减振效果的影响,进一步,依据海上风力机结构耦合运动响应控制率对TLCD的适用性和有效性进行了评价。
Abstract
The linear coupled spring is used to simulate the flexibilities of wind turbine pile foundations. Based on the fully coupled analysis theories in the time domain and linearized spring of pile foundation at the mudline, the coupled numerical model of the offshore wind turbine（OWT） with a tuned liquid column damper（TLCD） is established. Then, the vibration control of bottom-fixed OWT under combined winds and waves are carried out. The mitigation effects of TLCD on the bottom-fixed OWT are discussed, and the vibration reduction mechanisms are revealed according to the reduced responses in the frequency domain. It is shown that the free decayed motions and coupled structural responses of OWT are effectively alleviated by the designed TLCD with the designated support structural first frequency. Meanwhile, the differences in the mitigation effects among the selected load cases are verified, and the influence of interactions between the environmental loads and OWT responses are studied. Further, the applicability and effectiveness of the designed TLCD is evaluated based on the reductions of the OWT coupled responses.
关键词
海上风力机 /
动力响应 /
振动控制 /
调谐液柱阻尼器 /
整体耦合模型
Key words
offshore wind turbines /
dynamic response /
vibration control /
tuned liquid column damper /
fully coupled model
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基金
国家自然科学基金（51939002; 52001052）; 广东省海洋经济发展（海洋六大产业）专项基金（粤自然资合[2020]016）
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