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Currently, the main methods to evaluate the global stability of single-layer grid shells are finite element analysis and continuum shell analogy, but both of them have applied limits and inconvenience for common engineers. This study aims to propose evaluation equations to calculate the global buckling load of single-layer grid shells simply. Accordingly, large amounts of parametric analysis cases are carried out to investigate the relation of geometric parameters with buckling load factors. In addition, the regression analysis based on the software “1stOpt” is adopted to fit the relationship of global buckling load, effectiveness stiffness and geometric parameters into the form of the equation. As a result, the calculating results of equations match the analysis results very well, which shows the high accuracy of the proposed equations.

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Evaluation Equations of Global Stability for Single-Layer Cylindrical Grid Shells Based on Parametric Analysis and Regression Analysis

  • 会议论文

  • 发表日期：

    2025年

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  • Baoxin Liu,
  • Pei-Shan Chen,
  • Yaozhi Luo,
  • Hui-Bin Ge,
  • Yanbin Shen

摘要

Currently, the main methods to evaluate the global stability of single-layer grid shells are finite element analysis and continuum shell analogy, but both of them have applied limits and inconvenience for common engineers. This study aims to propose evaluation equations to calculate the global buckling load of single-layer grid shells simply. Accordingly, large amounts of parametric analysis cases are carried out to investigate the relation of geometric parameters with buckling load factors. In addition, the regression analysis based on the software “1stOpt” is adopted to fit the relationship of global buckling load, effectiveness stiffness and geometric parameters into the form of the equation. As a result, the calculating results of equations match the analysis results very well, which shows the high accuracy of the proposed equations.