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Estimation of the maximum allowable lack of penetration defects in circumferential butt welds of structural tubular towers

机译：估算结构性管状塔的圆周对接焊缝中最大允许的熔深缺陷

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摘要

This paper analyses the structural integrity of structural tubular towers (i.e., towers of wind turbines and floodlight towers) with lack of penetration defects on their circumferential butt welds. The methodology presented is particularised to the analysis of the lack of penetration defects detected in certain sections of several wind towers after the construction process. It is also analysed how such defects affect the fitness for service of the towers during their theoretical lifespan (20 years). The methodology (based on the use of Failure Assessment Diagrams, FAD) can easily be extrapolated to the assessment of other types of defects or towers. Its main hypotheses consist of establishing that the defects behave as internal cracks with certain geometries and also that-fracture and fatigue are the key processes affecting the structural integrity of the towers. Then, the resulting allowable crack size, corresponding to the lifespan of the tower, for the different sections analysed and for the different crack geometries considered is determined.
机译：本文分析了结构管状塔（即风轮机塔和泛光灯塔）在周向对接焊缝上没有渗透缺陷的结构完整性。提出的方法专门用于分析在建造过程之后在几个风塔的某些部分中检测不到的渗透缺陷。还分析了这些缺陷如何影响塔在其理论寿命（20年）内的使用寿命。该方法（基于故障评估图，FAD的使用）可以轻松地外推到其他类型的缺陷或塔的评估。其主要假设包括确定缺陷表现为具有特定几何形状的内部裂缝，并且断裂和疲劳是影响塔架结构完整性的关键过程。然后，针对所分析的不同部分以及所考虑的不同裂缝几何形状，确定与塔的使用寿命相对应的最终允许裂缝尺寸。

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  • 来源
    《Engineering Structures》 |2009年第9期|2123-2131|共9页
  • 作者

    S. Cicero; R. Lacalle; R. Cicero;

  • 作者单位

    Dpto. Ciencia e Ingenieria del Terreno y de los Materiales, Universidad de Cantabria, Santander, Cantabria, Spain;

    Dpto. Ciencia e Ingenieria del Terreno y de los Materiales, Universidad de Cantabria, Santander, Cantabria, Spain;

    Dpto. Ciencia e Ingenieria del Terreno y de los Materiales, Universidad de Cantabria, Santander, Cantabria, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tubular tower; lack of penetration; fracture; fatigue; sensitivity analysis;

    机译：管状塔缺乏渗透;断裂;疲劳;敏感性分析;

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