变弯度机翼参数化气动弹性建模与颤振特性分析  

Parametric aeroelastic modeling and flutter characteristic analysis of variable camber wing

作　　者：喻世杰 周兴华 黄锐[1] YU Shijie;ZHOU Xinghua;HUANG Rui(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《航空学报》2023年第8期120-132,共13页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(11972180,12022203)。

摘　　要：变体飞行器在变体过程中结构质量、刚度和阻尼特性会发生显著变化,导致其气动弹性效应十分复杂。如何高效、准确预测变体过程颤振边界是变体机翼结构动力学设计的难点问题之一。现有的非参数化气动弹性建模方法仅能针对单一变体构型进行颤振分析,对变构型的颤振需重复建模,效率低下且可能存在颤振边界丢失问题。针对后缘连续变弯度的变体机翼颤振分析问题,提出了一种参数化气动弹性建模新方法,并综合非定常气动力、流-固耦合插值和气动弹性建模,对变弯度机翼的参变颤振特性进行系统性分析。为验证该参数化建模方法在预测参变颤振特性的准确性,在变弯度机翼的参变模态特征、气动力计算和颤振预测等方面,进行了数值计算与对比研究。仿真结果表明,该方法可高效准确地预测全参数空间内变体机翼的参变颤振特性。The mass,stiffness,and damping characteristics of the morphing aircraft structure will change significantly during the morphing process to lead to incredible complexity of the aeroelastic effect.Efficient and accurate prediction of the flutter boundary is one of the challenging problems in the structural dynamics design of morphing aircraft.Exist⁃ing nonparametric aeroelastic modeling methods can only analyze the flutter of a single morphing configuration,and re⁃peated modeling is required for flutter calculation of morphing configuration,which may incur low computational effi⁃ciency and result in flutter boundary loss.This paper proposes a new parametric aeroelastic modeling for efficient flut⁃ter analysis of a wing with a continuously variable trailing edge.Based on the proposed aeroelastic modeling method,systematic analysis of parameter-varying flutter characteristics of a variable camber wing is investigated.To verify the accuracy of the parametric modeling method in parameter-varying flutter prediction,numerical calculation and compara⁃tive study were carried out in terms of parameter-varying modal characteristics,aerodynamic calculation and flutter prediction of variable camber wing.The simulation results indicate that the method proposed can efficiently and accu⁃rately predict parameter-varying flutter characteristics of morphing wing in the whole parameter space.

关 键 词：动力学 变体机翼 气动弹性力学 振动 颤振 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]