充气机翼的褶皱与失效行为研究

发布时间：2018-05-13 04:01

本文选题：充气机翼 + 褶皱　；参考：《航空学报》2016年10期

【摘要】：在经典工程梁理论的基础上,结合张力薄膜的应力状态分析,提出充气机翼褶皱失稳的判据。计入表面薄膜褶皱引起的刚度退化效应,将机翼等效处理为一个变截面刚度的梁,建立了充气悬臂机翼的等效梁模型,并采用微分求积法进行充气机翼弯曲变形分析。计算结果与充气机翼的静力弯曲试验结果相吻合,验证了充气机翼弯曲变形分析方法的有效性。应用片条理论引入气动力模型,并与所建立的等效梁模型相耦合,建立充气机翼的静气动弹性耦合模型,并用迭代算法进行求解。考虑起皱和失稳两种判据,并计算获取了试验机翼的起皱动压和皱褶失稳动压形式,计算结果与风洞试验结果一致。根据所建立的充气机翼静气动弹性分析方法,可以预测充气机翼表面褶皱区的扩展和弯曲变形,进而绘制充气机翼的静气弹许用包线,为充气机翼的设计提供必要的安全边界参考依据。
[Abstract]:Based on the classical engineering beam theory and the stress state analysis of the tension film, a criterion for the buckling of an inflatable wing is proposed. The equivalent beam model of an inflatable cantilever wing is established by taking into account the stiffness degradation effect caused by the surface film fold and the wing is treated as a beam with variable cross-section stiffness. The differential quadrature method is used to analyze the bending deformation of the inflatable wing. The calculated results are in good agreement with the static bending test results of the inflatable wing, which verifies the validity of the analysis method of the inflatable wing bending deformation. The aerodynamic model is introduced into the strip theory and coupled with the established equivalent beam model. The static Aeroelastic coupling model of the inflatable wing is established and solved by iterative algorithm. Two criteria of wrinkling and instability are considered, and the wrinkling dynamic pressure and crease instability dynamic pressure of the test wing are obtained. The calculated results are in agreement with the wind tunnel test results. According to the established static Aeroelastic analysis method, the expansion and bending deformation of the surface fold zone of the inflatable wing can be predicted, and then the allowable envelope of the aerostatic elasticity of the inflatable wing can be drawn. It provides the necessary safety boundary reference for the design of the inflatable wing.
【作者单位】：西北工业大学航空学院;
【基金】：国家自然科学基金(11172238) 中央高校基本科研业务费专项资金(3102014KYJD015) 高等学校创新引智计划(B07050)~~
【分类号】：V224

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