| 支撑结构频率对海上风机动力响应的影响机理研究 |
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| 引用本文： | 李彦娥,李涛,彭驰,李强,张杰.支撑结构频率对海上风机动力响应的影响机理研究[J].海洋工程,2023,41(4):38-48. |
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| 作者姓名： | 李彦娥 李涛 彭驰 李强 张杰 |
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| 作者单位： | 中国船舶重工集团海装风电股份有限公司，重庆 401120 |
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| 摘 要： | 海上支撑结构的优化设计是海上风机技术发展的必然趋势，降低支撑结构的载荷是保证风机安全运行的有效途径。海上支撑结构受到风浪复杂环境荷载作用，风、浪载荷决定着塔底承受较大的剪力和倾覆力矩，同时风浪的随机性和周期性会影响塔架的疲劳载荷。基于海上风机支撑结构频率对载荷影响的研究，分析海上支撑结构频率对叶片根部挥舞和摆振响应的影响，探究频率对风机响应的影响机理。研究表明：波浪频率诱导是基础疲劳载荷响应的主要原因；开展单桩基础设计，当整机频率确定时，基础变径段可设置于浪溅区下部区域范围；叶片摆振响应受1P频率影响较大，在风机设计时可增加叶片摆振方向的阻尼；当整机频率邻近3P频率时，塔筒刚度变化对基础载荷响应的影响大于基础刚度变化；海上支撑结构设计时可优先考虑塔筒刚度。
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| 关 键 词： | 海上支撑结构 整机频率 疲劳载荷 极端载荷 波浪频率 |
| 收稿时间： | 2022/9/26 0:00:00 |
Research on the influence mechanism of support structure frequency on the dynamic response of offshore wind turbine |
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| LI Yane,LI Tao,PENG Chi,LI Qiang,ZHANG Jie.Research on the influence mechanism of support structure frequency on the dynamic response of offshore wind turbine[J].Ocean Engineering,2023,41(4):38-48. |
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| Authors: | LI Yane LI Tao PENG Chi LI Qiang ZHANG Jie |
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| Abstract: | The optimal design of the offshore support structure is an inevitable trend in the development of offshore wind turbine technology, and reducing the load of the support structure is an effective way to ensure the safe operation of the wind turbine. The offshore support structure is subjected to the complex environmental loads of wind and wave loads, which determines that the tower bottom bears a large shear force and overturning moment. Meanwhile, the randomness and periodicity of wind and wave will affect the fatigue load of the structure. The influence of offshore wind turbine support structure frequency on blade root flapwise and degewise response is analyzed based on the research on the influence mechanism of the frequency on the load of the support structure, and the influence mechanism of frequency on wind turbine response is explored. The research shows that the wave frequency induction is the main cause of foundation fatigue load response. When carrying out the monopile foundation design, as the machine natural frequency is determined, the foundation variant section can be set in the lower area of the splash zone. The blade edgewise response is greatly affected by the 1P frequency, and the damping of the blade fore-aft direction can be increased in the design of the wind turbine. As the natural frequency is close to the 3P frequency, the influence of the tower stiffness change on the load response is greater than that of the foundation. Tower stiffness can be given priority in the design of offshore support structures. |
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| Keywords: | offshore support structure machine natural frequency fatigue load extreme load wave frequency |
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