具有随机不确定性的机翼颤振优化

doi:CNKI:11-1929/V.20110419.1702.003

Abstract

Abstract: A novel method is presented considering the effect of uncertainty in flutter optimization problem, which is used to perform the optimization design of composite material wing including random uncertainty parameters. The structure dynamic model is constructed using MSC.NASTRAN, the unsteady aerodynamic force is computed by ZAERO, and the implicit limit state function describing flutter failure criterion is built by response surface method. At last the optimization of composite material wing is conducted under the constraint of flutter speed. The results show that this method can solve the optimization problem of wing structure with uncertainties efficiently, is convenient to be applied to software integration and is suitable for large complex structural model. The optimization design has stability under the effects of random uncertainties.

Key words: aeroelasticity, flutter, random uncertainty, optimization, response surface method

CLC Number:

V215.3

ZHANG Junhong, HAN Jinglong, WANG Xiaoqing. Flutter Optimization of Wing Structure with Random Uncertainty[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(9): 1629-1636.

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Flutter Optimization of Wing Structure with Random Uncertainty

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