Flutter Characteristics of a Modified Z-Shaped Folding Wing Using a New Non-Intrusive Model

IF 2.1 3区工程技术 Q2 ENGINEERING, AEROSPACE

Aerospace Pub Date : 2024-05-24 DOI:10.3390/aerospace11060425

Wuchao Qi, Shimiao Wu, S. Tian

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引用次数: 0

Abstract

Unmanned aerial vehicles (UAVs) with folding wings can serve in multiple mission profiles, usually accompanied by sudden changes in flight speed. These bring great challenges to the aeroelastic design of UAVs, especially in the calculation of flutter characteristics. This paper developed a new non-intrusive aeroelastic model to quickly calculate the flutter characteristics of Z-shaped folding wings at different folding angles. First, the original Z-shaped folding wing was designed to be enhanced. Beams and ribs were arranged inside each wing segment to enhance the structural strength performance. Control surfaces were arranged in the middle-wing and outer-wing to enhance the aerodynamic control performance. Second, a parametric aeroelastic model at any folding angle was reconstructed based on the input file of Nastran software for the flutter calculation of the folding wing in the unfolded state. Finally, the effects of parameters such as folding angle, hinge stiffness between different wing segments, and hinge stiffness of the control surfaces on the flutter characteristics of the folding wing were investigated. The results show that the enhancement scheme could significantly increase the flutter speed and flutter frequency of the folding wing. The hinge stiffness between each wing segment had a significant impact on the flutter characteristics of the folding wing, but flutter at the control surface basically did not occur.

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使用新型非侵入式模型研究改良 Z 形折叠翼的扑翼特性

带有折叠式机翼的无人飞行器（UAV）可以执行多种任务，通常伴随着飞行速度的突然变化。这给无人飞行器的气动弹性设计，尤其是扑翼特性的计算带来了巨大挑战。本文建立了一种新的非侵入式气动弹性模型，以快速计算 Z 形折叠翼在不同折叠角度下的扑翼特性。首先，对原有的 Z 形折叠翼进行了增强设计。在每个翼段内部布置了梁和肋，以增强结构强度性能。在中翼和外翼布置了控制面，以提高气动控制性能。其次，根据 Nastran 软件的输入文件重建了任意折叠角度下的气动弹性参数模型，用于计算折叠翼在展开状态下的扑翼。最后，研究了折叠角、不同翼段之间的铰链刚度和控制面铰链刚度等参数对折叠翼扑翼特性的影响。结果表明，增强方案可显著提高折叠翼的扑翼速度和扑翼频率。各翼段之间的铰链刚度对折叠翼的扑翼特性有显著影响，但控制面基本不会发生扑翼。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace ENGINEERING, AEROSPACE-

CiteScore

3.40

自引率

23.10%

发文量

661

审稿时长

6 weeks

期刊介绍： Aerospace is a multidisciplinary science inviting submissions on, but not limited to, the following subject areas: aerodynamics computational fluid dynamics fluid-structure interaction flight mechanics plasmas research instrumentation test facilities environment material science structural analysis thermophysics and heat transfer thermal-structure interaction aeroacoustics optics electromagnetism and radar propulsion power generation and conversion fuels and propellants combustion multidisciplinary design optimization software engineering data analysis signal and image processing artificial intelligence aerospace vehicles'' operation, control and maintenance risk and reliability human factors human-automation interaction airline operations and management air traffic management airport design meteorology space exploration multi-physics interaction.