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首页> 外文期刊>Journal of structural engineering >Operational Modal Analysis and Finite-Element Model Updating of Pilot Concrete Wind Turbine Tower
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Operational Modal Analysis and Finite-Element Model Updating of Pilot Concrete Wind Turbine Tower

机译：试验性风力涡轮机塔架的运行模态分析和有限元模型更新

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This article deals with the dynamic behavior of a reinforced and posttensioned concrete structure for applications in wind turbine towers. Measurements were performed using triaxial accelerometers in a 30m high tower model, and the experimental setup is described in detail. The natural frequencies and mode shapes of the structure were extracted using operational modal analysis (OMA). The structure's Young's modulus was calculated analytically from the natural frequency of the radial-circumferential bending mode and their values were compared with the results obtained in static tests conducted on a concrete bar. The dynamic stiffness was calculated based on the frequency of the bending mode. Soil-foundation-structure interaction is reported in this article by calculating the displacement produced in the foundation and tower structure using data from the first tower bending mode. A simplified finite-element model was created to study the influence of elasticity and stiffness parameters on the modal shape of the structure and validate the results obtained from the experimental data.
机译：本文讨论了用于风力涡轮机塔架的钢筋混凝土和后张混凝土结构的动力特性。使用三轴加速度计在30m高塔模型中进行测量，并详细描述了实验装置。使用操作模态分析（OMA）提取结构的固有频率和模态形状。结构的杨氏模量是根据径向周向弯曲模式的固有频率进行解析计算的，并将它们的值与在混凝土钢筋上进行的静态测试中获得的结果进行比较。根据弯曲模式的频率计算动态刚度。通过使用第一个塔架弯曲模式的数据计算基础和塔架结构中产生的位移，本文报道了土壤-基础-结构相互作用。建立了一个简化的有限元模型来研究弹性和刚度参数对结构模态形状的影响，并验证从实验数据中获得的结果。

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