A novel reduced column section approach for the seismic protection of wind turbines
A novel reduced column section approach for the seismic protection of wind turbines
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一种新颖的减少柱截面的风力涡轮机抗震保护方法
DOI：
10.1016/j.engstruct.2023.115807
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发表时间：
2023
影响因子：
5.5
通讯作者：
Rostami R
中科院分区：
文献类型：
--
作者：
Rostami R
未来几十年全球能源需求的快速增长必须通过可再生能源生产的持续增长来维持，其中风能是目前快速增长的资源之一。新的陆上和海上风电场将在充满挑战的环境中快速建设，特别是在地震多发地区。因此，减轻风力发电机的动态振动成为抗震设计的一个基本方面，以保证其正常运行和结构安全。与过去基于调谐质量阻尼器或调谐液柱阻尼器等传统被动控制装置的建议不同，本研究旨在提出一种新颖的方法，即减少柱截面（RCS），以衍生出一种创新的缓解装置，取代传统的风力涡轮机过渡件。将建立设计拟议 RCS 的分析公式。拟议设备的优点将在位于意大利的真实陆上风力涡轮机上进行评估。从风力涡轮机的连续动态监测中获得的模态特性将用于表征数值有限元模型。因此，将进行与频谱兼容的真实地震的直接集成分析和增量动力分析，以评估所提出的 RCS 引起的动力缓解。还将考虑土壤-结构相互作用的影响。这项研究表明，与现有结构上计算的应力相比，RCS 可以有效地将风塔壁上的有效应力减轻高达 70%。
The rapid increase in global energy demand over the coming decades must be sustained by a more consistent increment of energy production from renewable sources of which wind energy is currently one of the fast-growing resources. New onshore and offshore wind farms will be rapidly constructed in challenging environments, especially in earthquake-prone areas. As a result, the mitigation of the dynamic vibrations of the wind turbines becomes a fundamental aspect of the seismic design to guarantee their normal operativity and structural safety. Different from past proposals based on traditional passive control devices such as tuned mass dampers or tuned liquid column dampers, this study aims to propose a novel approach, the Reduced Column Section (RCS), to derive an innovative mitigation device which replaces the traditional transition piece of the wind turbine. Analytical formulas to design the proposed RCS will be established. The benefits of the proposed device will be assessed on a real onshore wind turbine located in Italy. Modal properties obtained from the continuous dynamic monitoring of the wind turbine will be used to characterize the numerical finite element model. Therefore, a direct integration analysis with spectrum-compatible real earthquakes and an incremental dynamic analysis will be conducted to evaluate the dynamic mitigation induced by the proposed RCS. Soil-structure interaction effects will be also considered. This study shows that RCS can efficiently mitigate the effective stresses on the wind tower wall by up to 70% compared to the stresses computed on the existing structure.
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