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Assessment of preliminary design approaches for metallic stiffened cylindrical shell instability problems.

机译:对金属加劲圆柱壳不稳定性问题的初步设计方法的评估。

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摘要

A preliminary design tool for metallic stiffened fuselage cylindrical panels subjected to longitudinal compression has been developed and validated by comparison to test results. Several methodologies for stiffened panel buckling and failure predictions were examined and evaluated. An appropriate level of analysis fidelity was determined for different failure modes and design details. Results from panel tests conducted to verify analytical methods used to design the Gulfstream V aircraft were presented. The panels were representative of four general skin/stringer configurations on the aircraft. Finite Element analyses and standard analytical methods were used to predict panel failure loads. The accuracy of the finite element analysis predictions was dependent upon the level of detail included in the model. The inclusion of such details as fasteners had a significant effect on the predicted failure load. The omission of such complexities from the finite element model led to unconservative failure predictions. Standard analytical methods were found to be more efficient than finite element methods and produced conservative panel failure loads. Improvements for a preliminary design tool were identified to reduce conservatism in failure predictions and thereby reduce structural weight.
机译:已经开发了一种用于金属加硬机身圆柱板的纵向设计的初步设计工具,并通过与测试结果进行比较进行了验证。检查和评估了几种用于加强面板屈曲和破坏预测的方法。针对不同的故障模式和设计细节确定了适当的分析保真度。介绍了为验证用于湾流V型飞机的分析方法而进行的面板测试的结果。这些面板代表了飞机上的四种常规蒙皮/纵梁配置。有限元分析和标准分析方法被用来预测面板失效载荷。有限元分析预测的准确性取决于模型中包含的详细程度。包含诸如紧固件之类的细节对预测的失效载荷有重大影响。从有限元模型中忽略了这种复杂性导致了非保守的失效预测。发现标准分析方法比有限元方法更有效,并且产生了保守的面板破坏载荷。确定了对初步设计工具的改进,以减少故障预测中的保守性,从而减少结构重量。

著录项

  • 作者

    Britt, Vicki Owen.;

  • 作者单位

    Old Dominion University.;

  • 授予单位 Old Dominion University.;
  • 学科 Engineering Aerospace.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 231 p.
  • 总页数 231
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;
  • 关键词

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