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| 海冰作用下近海桩柱式风力机动力学响应研究 |
| Study on Dynamic Response of Offshore Piling Wind Turbine with Ice Load |
| 投稿时间：2015-03-27 |
| DOI：10.13259/j.cnki.eri.2017.04.001 |
| 中文关键词: 桩柱式风力机 海冰载荷 冰力函数 动力学响应 |
| 英文关键词:piling wind turbine ice load ice force function dynamic response |
| 基金项目: |
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| 中文摘要: |
| 高纬度低温海域海平面存在大量运动状态的海冰，位于此处的近海桩柱式风力机容易受到不规则的海冰载荷作用，风力机平台、塔架和叶片等结构部件的动力学响应均受其影响.为定性及定量分析海冰载荷对叶片和塔架的结构动力学响应的影响程度，以NREL 5 MW近海4桩柱式风力机为研究对象，耦合风载荷、波浪载荷及海冰载荷，通过Kane方法建立风力机动力学模型，其中海冰载荷通过冰力函数定义.对比分析了在IEC Lock in冰力函数、Määttänen海冰模型和无海冰作用三种工况下叶片和塔架的结构动力学响应，结果表明：海冰载荷使塔顶位移增加，在Määttänen海冰模型作用下塔顶位移增加了24.1%，在IEC Lock in模型作用下则增加了16%；两种海冰模型均不同程度地使叶片挥舞振动的频率增大，其中在Määttänen海冰模型中变化更加剧烈，这极大地增加了叶片的疲劳载荷. |
| 英文摘要: |
| There exists a lot of floating ice at low temperature and high latitude sea.The dynamic response of offshore piling wind turbine's platform,tower and blades is affected by the irregular ice load.In order to analyze the effect of ice load on the dynamic response of the blade and tower qualitatively and quantitatively,the Kane method was applied to build the dynamic model based on NREL 5 MW offshore 4-piling wind turbine with the loads of wind,wave and ice.The ice load was defined by the ice force function.The comparative analysis was performed for the blade and tower dynamic response among IEC Lock in the ice force function,Määttänen model and no ice load.The results showed that the displacement of tower top increased significantly with the ice load.It increased by 24.1% and 16% for Määttänen model and IEC Lock in model,respectively.Both models increased the waved vibration frequency of the blade with different levels.In particular,Määttänen model increased the fatigue loading of the blade. |
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