Optimal Design of a Passive Gust Alleviation Device for a Flying Wing Aircraft
Optimal Design of a Passive Gust Alleviation Device for a Flying Wing Aircraft
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DOI：
10.2514/6.2012-5625
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发表时间：
2012-09
期刊：
影响因子：
--
通讯作者：
S. Guo;Q. Fu
中科院分区：
文献类型：
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作者：
S. Guo;Q. Fu
本文研究了在翼尖加装被动阵风缓解装置（PGAD）的飞翼构型下，如何使飞机的阵风响应最小化。本文从气动分析和比较出发，采用涡格法和CFD法对特定飞行工况进行了研究。采用有限元法对加筋板进行了屈曲和应力分析等复合材料结构设计，以确保大后掠角和高向翼结构满足设计要求。随后，计算了等效频率范围内离散（1cos）阵风荷载对机翼的模态分析和阵风响应。在实际设计约束下，通过优化设计关键参数，对风响应缓解效果进行评价。优化后的PGAD和机翼气动弹性效应非常有效，在海平面最关键的飞行情况下，阵风响应在机翼载荷和偏转方面减少了至少17%。
This paper presents an investigation into minimizing the gust response of an aircraft in flying wing configuration integrated with a passive gust alleviation device (PGAD) at the wing tip. The study was started from the aerodynamic analysis and comparison by using vortex lattice method and CFD method at specified flight cases. Composite structural design including stiffened panel buckling and stress analysis was carried out by using FE method to make sure the large sweep angle and high aspect wing structure meet the design requirements. Subsequently modal analysis and gust response of the wing to a discrete (1cos) gust load in a range of equivalent frequency were calculated. The gust response alleviation was evaluated by optimizing the key design parameters of the PGAD subject to practical design constraint. The optimized PGAD together with the wing aeroelastic effect is very effective and leads to the gust response reduction in terms of wing load and deflection by at least 17% in the most critical flight case at sea level.