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Imperfections in realistic metal wind turbine support towers: a one‐at‐a‐time (OAAT) study.

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Title: Imperfections in realistic metal wind turbine support towers: a one‐at‐a‐time (OAAT) study.
Authors: Kathirkamanathan, Lijithan1 (AUTHOR) l.kathirkamanathan@imperial.ac.uk, Sadowski, Adam1 (AUTHOR), Seidel, Marc2 (AUTHOR)
Source: CE/Papers. Sep2023, Vol. 6 Issue 3/4, p1093-1098. 6p.
Subjects: Wind turbines, Mechanical buckling, Imperfection, Finite element method, Metals
Abstract: The ultimate limit state of buckling is an important consideration for the design of wind turbine support towers (WTSTs) which is increasingly being done with the aid of advanced nonlinear finite element analysis according to EN 1993‐1‐6. As these towers are relatively slender thin‐walled metal shell structures, their response and buckling resistance is invariably affected by geometric imperfections. This paper presents a sensitivity study into the possible relative influences of four different types of realistic imperfections that are likely to arise in WTST construction on the elastic‐plastic buckling resistance as assessed by computational GMNIAs. These include idealised but realistic representations of axisymmetric circumferential weld depressions, unintended eccentricities at curved plate boundaries, a global out‐of‐roundness and corrected parallel flange interface gaps. The relative sensitivity is explored via a 'one‐at‐a‐time' (OAAT) study where all factors but one are kept at a constant intensity while the active factor is scaled, with the influence on the computed GMNIA under two load cases recorded. The OAAT study suggests that for shell structures representative of the geometric ranges typical for WTSTs, the weld depression has the most deleterious effect on the predicted buckling resistance. [ABSTRACT FROM AUTHOR]
Copyright of CE/Papers is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 172301450
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="JN" term="%22CE%2FPapers%22">CE/Papers</searchLink>. Sep2023, Vol. 6 Issue 3/4, p1093-1098. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Wind+turbines%22">Wind turbines</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+buckling%22">Mechanical buckling</searchLink><br /><searchLink fieldCode="DE" term="%22Imperfection%22">Imperfection</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Metals%22">Metals</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The ultimate limit state of buckling is an important consideration for the design of wind turbine support towers (WTSTs) which is increasingly being done with the aid of advanced nonlinear finite element analysis according to EN 1993‐1‐6. As these towers are relatively slender thin‐walled metal shell structures, their response and buckling resistance is invariably affected by geometric imperfections. This paper presents a sensitivity study into the possible relative influences of four different types of realistic imperfections that are likely to arise in WTST construction on the elastic‐plastic buckling resistance as assessed by computational GMNIAs. These include idealised but realistic representations of axisymmetric circumferential weld depressions, unintended eccentricities at curved plate boundaries, a global out‐of‐roundness and corrected parallel flange interface gaps. The relative sensitivity is explored via a 'one‐at‐a‐time' (OAAT) study where all factors but one are kept at a constant intensity while the active factor is scaled, with the influence on the computed GMNIA under two load cases recorded. The OAAT study suggests that for shell structures representative of the geometric ranges typical for WTSTs, the weld depression has the most deleterious effect on the predicted buckling resistance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of CE/Papers is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1002/cepa.2352
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 1093
    Subjects:
      – SubjectFull: Wind turbines
        Type: general
      – SubjectFull: Mechanical buckling
        Type: general
      – SubjectFull: Imperfection
        Type: general
      – SubjectFull: Finite element method
        Type: general
      – SubjectFull: Metals
        Type: general
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      – TitleFull: Imperfections in realistic metal wind turbine support towers: a one‐at‐a‐time (OAAT) study.
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            NameFull: Kathirkamanathan, Lijithan
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            NameFull: Sadowski, Adam
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            NameFull: Seidel, Marc
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            – D: 15
              M: 09
              Text: Sep2023
              Type: published
              Y: 2023
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