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Span Morphing Using the Compliant Spar

机译：使用标准翼梁进行跨度变形

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摘要

This paper develops and models the compliant spar concept that allows the wingspan to be varied to provide roll control and enhance the operational performance for a medium altitude, long endurance (MALE) UAV. The wing semispan is split into morphing partitions and the concept may be incorporated in each partition; however, only the tip partition is considered here. The compliant spar is made of compliant joints arranged in series to allow the partition to be flexible under axial (spanwise) loads, but at the same time stiff enough to resist bending loads. Each compliant joint consists of two concentric overlapping AL 2024-T3 tubes joined together using elastomeric material. Under axial (spanwise) loading, the elastomeric material deforms in shear, allowing the overlapping distance between the tubes to vary and hence the length (in the spanwise direction) of the joint/spar to vary. High fidelity modeling of the concept is performed. Then, structural design optimization studies are performed to minimize the axial stiffness and the structural mass of the concept for various design constraints. The flexible skin and actuation system to be used are also addressed. (C) 2014 American Society of Civil Engineers.
机译：本文开发并建模了兼容的翼梁概念，该翼梁概念允许改变翼展以提供侧倾控制并增强中等高度，长寿命（MALE）无人机的运行性能。机翼半跨分为变形分区，该概念可以合并到每个分区中。但是，此处仅考虑尖端分区。柔性梁由串联布置的柔性接头制成，以使隔板在轴向（跨度）载荷下具有挠性，但同时又足够坚硬以抵抗弯曲载荷。每个顺应式接头均由两根同心的重叠AL 2024-T3管组成，这些管使用弹性材料连接在一起。在轴向（跨度）载荷下，弹性体材料会在剪切力作用下变形，从而使管之间的重叠距离发生变化，从而使接头/翼梁的长度（沿跨度方向）发生变化。执行该概念的高保真建模。然后，进行结构设计优化研究，以最小化针对各种设计约束的概念的轴向刚度和结构质量。还讨论了要使用的柔性皮肤和致动系统。 （C）2014年美国土木工程师学会。

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  • 来源
    《Journal of aerospace engineering》 |2015年第4期|04014108.1-04014108.13|共13页
  • 作者

    Ajaj R. M.; Saavedra Flores E. I.; Friswell M. I.; De la O F. A. Diaz;

  • 作者单位

    Univ Southampton, Aeronaut & Astronaut, Aerosp Struct, Southampton SO17 1BJ, Hants, England;

    Univ Santiago Chile, Dept Ingn Obras Civiles, Santiago, Chile;

    Swansea Univ, Coll Engn, Aerosp Struct, Swansea SA2 8PP, W Glam, Wales;

    Univ Liverpool, Sch Engn, Liverpool L69 3GQ, Merseyside, England;

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