原文传递
Operational Modal Analysis and Finite-Element Model Updating of Pilot Concrete Wind Turbine Tower
| 题名： | Operational Modal Analysis and Finite-Element Model Updating of Pilot Concrete Wind Turbine Tower |
| 正文语种： | 英文 |
| 作者： | Edilson Alexandre Camargo1; Jens Peder Ulfkjaer2; Rune Brincker3; Jens Noergaard4; Simon Steen Gadegaard5 |
| 作者单位： | 1Senior Researcher, Instituto de Aeron醬tica e Espaco, Sao Jos?dos Campos 12243-040, Brazil (corresponding author). 2Associate Professor, Dept. of Engineering, Aarhus Univ., 8000C Aarhus, Denmark. 3Professor, Dept. of Engineering, Aarhus Univ., 8000C Aarhus,Denmark. 4Master Student, Dept. of Engineering, Aarhus Univ., 8000C Aarhus,Denmark. 5Master Student, Dept. of Engineering, Aarhus Univ., 8000C Aarhus,Denmark. |
| 关键词： | Operational modal analysis; Finite-element model; Pilot concrete tower; Wind turbine |
| 摘要： | 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 30 m 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. |
| 出版年： | 2019 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 145 |
| 期： | 2 |
| 页码： | 1-12 |
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