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首页> 外文会议>ASME International Offshore Wind Technical Conference >A CONSISTENT STRUCTURAL DAMPING MODEL FOR INTEGRATED AND SUPERELEMENT MODELLING OF OFFSHORE WIND TURBINE SUPPORT STRUCTURES IN WIND TURBINE DESIGN SOFTWARE BLADED
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A CONSISTENT STRUCTURAL DAMPING MODEL FOR INTEGRATED AND SUPERELEMENT MODELLING OF OFFSHORE WIND TURBINE SUPPORT STRUCTURES IN WIND TURBINE DESIGN SOFTWARE BLADED

机译：风轮机设计软件中海上风轮机支撑结构一体化建模的统一结构阻尼模型

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摘要

In aero-elastic simulation of offshore wind turbines, the support structure can be modelled using an "integrated" approach, where the jacket and tower and modelled explicitly as one structural body, or a "superelement" approach, where the jacket part of the support structure is included as a superelement. For integrated modelling, vibration mode shapes are calculated for the whole support structure. For a superelement approach, separate mode shapes are defined for superelement and the tower. The different modal basis makes it difficult to align the structural damping definition for the two approaches, meaning that manual tuning of the modal damping ratios has previously been necessary to achieve equivalent damping on the whole support structure for the two approaches. To provide a consistent damping approach, it is proposed to specify modal damping ratios or Rayleigh damping on a modal basis which is common to the two approaches: the support structure natural mode shapes. When damping is specified on the natural modes of the support structure, equivalent support structure damping is observed for superelement and integrated modelling approaches. This allows the target support structure damping ratios to be achieved easily and also facilitates studies to compare the superelement and integrated modelling approaches.
机译：在海上风力涡轮机的空气弹性模拟中，可以使用“集成”方法对支撑结构进行建模，在该方法中，将外套和塔架建模为一个结构体;对于“超元素”方法，可以使用“超元素”方法，对支撑的外套部分进行建模。结构是作为超级元素包括在内的。对于集成建模，将为整个支撑结构计算振动模式形状。对于超单元方法，为超单元和塔架定义了单独的模式形状。不同的模态基础使两种方法的结构阻尼定义难以一致，这意味着以前必须对模态阻尼比进行人工调整，以实现两种方法在整个支撑结构上的等效阻尼。为了提供一致的阻尼方法，建议在模态基础上指定模态阻尼比或瑞利阻尼，这是两种方法所共有的：支撑结构自然模态。当在支撑结构的固有模式上指定阻尼时，对于超单元和集成建模方法会观察到等效的支撑结构阻尼。这使得目标支撑结构的阻尼比很容易实现，并且也便于研究比较超单元和集成建模方法。

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