考虑不确定性的复合材料加筋壁板后屈曲分析模型验证方法

doi:10.7527/S1000-6893.2020.23987

Abstract

Abstract: In the lightweight structural design of stiffened composite panels, uncertainties in the geometric and material parameters lead to the uncertainty of ultimate load carrying capacity. Therefore, it is necessary to consider these uncertainties in model validation. A method to validate the post-buckling finite element model of stiffened composite panels considering the uncertain factors is proposed. Based on the orthogonal experimental design, the significance analysis of the uncertainty parameters was first carried out to obtain significance parameters, followed by the acquisition of a surrogate model by the Kriging model to represent the post-buckling characteristics. The probability distribution of the post-buckling loads for the stiffened composite panel was achieved by Monte Carlo simulations, and the accuracy of the post-buckling model verified by experimental data. This validation approach can be applied to similar engineering cases.

Key words: composite materials, stiffened panels, post-buckling, uncertainties, model validation

CLC Number:

V258.3

WANG Binwen, AI Sen, ZHANG Guofan, NIE Xiaohua, WU Cunli. Validation method for post-buckling analysis model of stiffened composite panels considering uncertainties[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(8): 223987-223987.

References 24

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Validation method for post-buckling analysis model of stiffened composite panels considering uncertainties

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