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Probabilistic calibration of fatigue safety factors for offshore wind turbine concrete structures

机译:海上风力涡轮机混凝土结构疲劳安全因子的概率校准

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摘要

Current fatigue design rules for offshore concrete structures were adopted from the oil and gas industry. When better models or more information are available, partial safety factors can be recalibrated according to target reliability levels for offshore wind turbines. This paper describes a framework for reliability-based calibration of fatigue partial safety factors for offshore wind turbine concrete structures. Offshore wind turbine loads accounting for the statistical distribution of turbulence intensity are estimated using a fully-integrated aeroelastic model. Based on available experimental fatigue tests, a fatigue reliability model for concrete is formulated and applied in two numerical examples. Results indicate that the recommended material partial safety factor in the DNV standard for Offshore Concrete Structures can be lowered without compromising structural safety. The proposed modification can potentially contribute to structural design optimization and further cost reduction in offshore wind energy.
机译:石油和天然气工业采用了海上混凝土结构的当前疲劳设计规则。当有更好的模型或更多信息时,可以根据近海风力涡轮机的目标可靠性水平来重新校准部分安全因子。本文介绍了海上风力涡轮机混凝土结构的可靠性基于疲劳部分安全因子的校准框架。使用全集成的空气弹性模型估算海上风力涡轮机负荷算用于湍流强度的统计分布。基于可用的实验疲劳试验,配制了混凝土的疲劳可靠性模型,并应用了两个数值例子。结果表明,在不损害结构安全的情况下,可以降低海上混凝土结构的DNV标准的推荐材料部分安全系数。所提出的修改可能有助于近海风能的结构设计优化和进一步降低。

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  • 来源
    《Oceanographic Literature Review》 |2020年第9期|2068-2068|共1页
  • 作者单位

    Marine and Foundation Engineering COWI A/S Aarhus 8000 Denmark;

    Marine and Foundation Engineering COWI A/S Aarhus 8000 Denmark;

    Marine and Foundation Engineering COWI A/S Aarhus 8000 Denmark;

    Marine and Foundation Engineering COWI A/S Aarhus 8000 Denmark;

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  • 正文语种 eng
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