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Structural and Aeroelastic Design of a Joined-Wing UAV

机译：联翼无人机的结构和气动弹性设计

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摘要

The Italian Aerospace Research Center (CIRA) is currently designing an unmanned aerial research system that is lightweight and has high-structural flexibility, code named the High Altitude Performance Demonstrator (HAPD).The project is framed within the Italian Aerospace Research Program, under the Unmanned Aerial Vehicle (UAV) Chapter. This unmanned aerial system is mainly aimed at developing and validating advanced modeling methodologies for flexible aircrafts. A compendium of the system is provided in this paper, together with a deeper discussion of how CIRA developed the structural and aeroelastic design of HAPD. Some experimental tests performed to validate the main concepts are also presented. The vehicle has an unconventional joined-wing configuration that mitigates undesired extreme flexibility, but that results in a more complicated design. First, aeroelasticity has been taken into account from the preliminary stages of design because flexibility significantly affects aircraft behavior. Second, the HAPD structure is redundant with regard to constraints (because of its joined wing), thus making the internal forces dependent on the stiffness distribution. For these reasons, the availability of an integrated methodology that can support the structural design is mandatory. The output of such a methodology consists of primary structure stiffness distributions (fuselage, wings, and vertical tail), compatibly with the absence of any aeroelastic instability, and structural failure under operative loads.
机译：意大利航空航天研究中心（CIRA）目前正在设计一种重量轻且具有高结构灵活性的无人驾驶航空研究系统，代号为“高空性能演示器（HAPD）”。无人机（UAV）一章。该无人机系统主要旨在开发和验证用于柔性飞机的先进建模方法。本文提供了该系统的纲要，以及对CIRA如何开发HAPD的结构和空气弹性设计的更深入的讨论。还介绍了一些为验证主要概念而进行的实验测试。该车辆具有非常规的联翼配置，可减轻不必要的极端灵活性，但会导致设计更为复杂。首先，从设计的初始阶段就考虑了空气弹性，因为柔韧性会显着影响飞机的行为。其次，HAPD结构在约束方面是多余的（由于其连接的机翼），因此使内力取决于刚度分布。由于这些原因，必须有能够支持结构设计的集成方法。这种方法的输出由主要结构刚度分布（机身，机翼和垂直尾翼）组成，在没有任何气动弹性不稳定的情况下，以及在工作载荷下的结构破坏，都可以与之兼容。

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  • 来源
    《Journal of aerospace engineering》 |2014年第1期|93-111|共19页
  • 作者

    M. Belardo; N. Paletta; L. Di Palma; M. Pecora;

  • 作者单位

    Aero-structural Design and Analysis Group, Aircraft Di-vision, Italian Aerospace Research Center (CIRA), 81043 Capua, CE, Italy;

    Aero-structural Design and Analysis Group, Aircraft Di-vision, Italian Aerospace Research Center (CIRA), 81043 Capua, CE, Italy;

    Project Management and System Engineering, Aircraft Di-vision, Italian Aerospace Research Center (CIRA), 81043 Capua, CE, Italy;

    Aero-structural Design and Analysis Group, Aircraft Di-vision, Italian Aerospace Research Center (CIRA), 81043 Capua, CE, Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Unmanned aerial vehicle (UAV); Joined wing; Structural design and testing; Aeroelasticity;

    机译：无人机（UAV）;联队;结构设计和测试;空气弹性;

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