Fluid Mechanics and Flight Mechanics

A rapid buckling analysis method for large-scale grid-stiffened cylindrical shells

  • WANG Bo ,
  • TIAN Kuo ,
  • ZHENG Yanbing ,
  • HAO Peng ,
  • ZHANG Ke
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  • State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China

Received date: 2016-04-27

  Revised date: 2016-07-06

  Online published: 2016-08-15

Supported by

National Basic Research Program of China (2014CB049000); National Natural Science Foundation of China (11372062, 11402049); China Postdoctoral Science Foundation (2015T80246); "111" Project (B14013)

Abstract

A rapid buckling analysis method is proposed in this paper for large-scale grid-stiffened cylindrical shells used in heavy-lift launch vehicles and large aircrafts. The analysis framework is established by combining asymptotic homogenization method with Rayleigh-Ritz method. A comparison with the buckling load results by smeared stiffener method demonstrates the high prediction accuracy of the proposed method. Evaluation of the analysis efficiency of grid-stiffened cylindrical shells in three different model scales shows that the average computational time by rapid buckling analysis method is only 6 s and which is not inftuenced by the model scale, highlighting the efficiency of the proposed method for large-scale structures. The widespread grid applicability of this method for four traditional grid types and two complicated hierarchical grid types is validated, and their prediction errors are all below 3.0%. Optimizations are performed to compare the load-carrying efficiency of these six grid types. Optimization results illustrate that the proposed hierarchical triangle grid type achieves an increase of load-carrying efficiency by 82.2% than the initial design, and can be considered as an innovative grid type for large-scale grid-stiffened cylindrical shells.

Cite this article

WANG Bo , TIAN Kuo , ZHENG Yanbing , HAO Peng , ZHANG Ke . A rapid buckling analysis method for large-scale grid-stiffened cylindrical shells[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017 , 38(2) : 220379 -220387 . DOI: 10.7527/S1000-6893.2016.0209

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