Aeroelasticity study of high span ratio wing with flare folding wingtip

被引：0
|
作者：
Ye B. [1 ]
Yang Y. [1 ]
Lu J. [2 ]
Yu L. [1 ]
Cheng Z. [1 ]
机构：
[1] School of Flight Vehicle and Engineering, Nanchang Hangkong University, Nanchang
[2] The Third Military Representative Office of Army Equipment Department in Nanjing, Nanjing
来源：
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | 2024年 / 42卷 / 02期
关键词：
flight loads; flutter; folding wing tips; gust load alleviation; gust response;
D O I：
10.1051/jnwpu/20244220241
中图分类号：
学科分类号：
摘要：
Flare folding wing-tips rely on the adaptive deformation of the structure to reduce the flight load, which can effectively simplify the control system, and has more advantages in cost and weight. To study the effect of the elastic folding wingtip as a passive load alleviation device, the flexible hinges were used to connect the folding wingtip to the wing, and the Doublet Lattice panel method was used to calculate the aerodynamic loads. Static and dynamic load response and flutter analysis were performed on the folding wingtip configurations with different structural parameters, and the effects of the hinge orientation, stiffness, wingtip weight and wingtip center of gravity position on the load response and flutter behavior were investigated. The results show that the flare folding wingtip can significantly reduce the static and sudden wind loads of the wing with suitable parameters. In the static aeroelastic trim analysis, the folding wingtip can increase the span length by 25% with almost no increase in the wing root bending moment and reduce the trim angle of attack by 0.14°. In the gust response analysis, the maximum wing root bending moment can be reduced by nearly 50% comparing with the fixed wing tip, which is only 17% higher than the baseline model without the wing tip. However, the flutter velocity is reduced, and further optimization is needed to improve the flutter characteristics. ©2024 Journal of Northwestern Polytechnical University.
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页码：241 / 250
页数：9
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