Journal
COMPOSITE STRUCTURES
Volume 131, Issue -, Pages 594-605Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2015.06.011
Keywords
Rotational uncertainty; Central composite design method; Natural frequency; Shallow conical shell; Sensitivity analysis; Stochastic mode shapes
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This paper presents the quantification of rotational and ply level uncertainty of random natural frequency for laminated composite conical shells by using surrogate modeling approach. The stochastic eigenvalue problem is solved by using QR iteration algorithm. Sensitivity analysis is carried out to address the influence of different input parameters on the output natural frequencies. The sampling size and computational cost is reduced by employing the present approach compared to direct Monte Carlo simulation. The stochastic mode shapes are also depicted for a typical laminate configuration. Statistical analysis is presented to illustrate the results and its performance. (C) 2015 Elsevier Ltd. All rights reserved.
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