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首页> 外文期刊>The Aeronautical Journal >Improved aerostructural performance via aeroservoelastic tailoring of a composite wing
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Improved aerostructural performance via aeroservoelastic tailoring of a composite wing

机译：通过对复合材料机翼进行航空弹力剪裁来改善航空结构性能

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This paper investigates the synergies and trade-offs between passive aeroelastic tailoring and adaptive aeroelastic deformation of a transport composite wing for fuel burn minimisation. This goal is achieved by optimising thickness and stiffness distributions of constitutive laminates, jig-twist shape and distributed control surface deflections through different segments of a nominal "cruise-climb" mission. Enhanced aerostructural efficiency is sought both passively and adaptively as a means of aerodynamic load redistribution, which, in turn, is used for manoeuvre load relief and minimum drag dissipation. Passive shape adaptation is obtained by embedding shear-extension and bend-twist couplings in the laminated wing skins. Adaptive camber changes are provided via full-span trailing-edge flaps. Optimised design solutions are found using a bi-level approach that integrates gradient-based and particle swarm optimisations in order to tailor structural properties at rib-bay level and retrieve blended stacking sequences. Performance benefits from the combination of passive aeroelastic tailoring with adaptive control devices are benchmarked in terms of fuel burn and a payload-range efficiency. It is shown that the aeroservoelastically tailored composite design allows for significant weight and fuel burn improvements when compared to a similar all-metallic wing. Additionally, the trailing-edge flap augmentation can extend the aircraft performance envelope and improve the overall cruise span efficiency to nearly optimal lift distributions.
机译：本文研究了运输复合材料机翼的被动气动弹性剪裁与自适应气动弹性变形之间的协同作用和取舍，以最大程度地减少燃油消耗。该目标是通过优化标称“巡航爬升”任务的不同部分来优化本构层压板的厚度和刚度分布，夹具扭曲形状以及分布的控制表面挠度来实现的。被动地和自适应地寻求提高的空气动力学效率作为空气动力载荷重新分配的一种手段，该方法又用于机动载荷减轻和最小的阻力消散。通过在叠层机翼蒙皮中嵌入剪力扩展和弯扭联轴器来获得被动形状匹配。通过全跨度后缘襟翼可提供自适应的外倾角变化。使用双层方法找到了优化的设计解决方案，该方法集成了基于梯度的优化和粒子群优化，以便在肋骨-海湾水平上调整结构特性并检索混合的堆叠顺序。被动式气动弹性剪裁与自适应控制设备相结合所带来的性能优势，已在燃油消耗和有效载荷范围效率方面进行了基准测试。结果表明，与类似的全金属机翼相比，采用气动弹性定制的复合材料设计可显着改善重量和燃油消耗。另外，后缘襟翼的增加可以扩展飞机的性能范围，并将总的巡航跨度效率提高到几乎最佳的升力分布。

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