摘要
The relationship between stiffness distribution and aeroelastic performance for a beam-frame model and a3-D model is investigated based on aeroelastic optimization of global stiffness design for high-aspect-ratio wings.The sensitivity information of wing spanwise stiffness distribution with respect to the twist angle at wing tip,the vertical displacement at wing tip,and the flutter speed are obtained using a sensitivity method for both models.Then the relationship between stiffness distribution and aeroelastic performance is summarized to guide the design procedure.By using the genetic/sensitivity-based hybrid algorithm,an optimal solution satisfying the strength,aeroelastic and manufacturing constraints is obtained.It is found that the summarized guidance is well consistent with the optimal solution,thus providing a valuable design advice with efficiency.The study also shows that the aeroelastic-optimization-based global stiffness design procedure can obtain the optimal solution under multiple constraints with high efficiency and precision,thereby having a strong application value in engineering.
The relationship between stiffness distribution and aeroelastic performance for a beam-frame model and a 3-D model is investigated based on aeroelastic optimization of global stiffness design for high-aspect-ratio wings. The sensitivity information of wing spanwise stiffness distribution with respect to the twist angle at wing tip, the vertical displacement at wing tip, and the flutter speed are obtained using a sensitivity method for both models. Then the relationship between stiffness distribution and aeroelastic performance is summarized to guide the design procedure. By using the genetic/sensitivity-based hybrid algorithm, an optimal solution satisfying the strength, aeroelastic and manufacturing constraints is obtained. It is found that the summarized guidance is well consistent with the optimal solution, thus providing a valuable design advice with efficiency. The study also shows that the aeroelastic-optimization-based global stiffness design procedure can obtain the optimal solution under multiple constraints with high efficiency and precision, thereby having a strong application value in engineering.
基金
supported by the National Natural Science Foundation of China (Nos.11302011,11372023, 11172025)
作者简介
Dr. Wan Zhiqiang Aeronautic Science His major research is currently a professor at School of and Engineering, Beihang University. interests are aircraft design and optimi- zation, aerothermoelasticity of hypersonic vehicles, and adaptive structures.
Mr. Du Ziliang is currently a Ph. D. candidate at School of Aeronautic Science and Engineering, Beihang University. His major research interests are aircraft design and optimization and aerothermoelasticity of hypersonic vehicles.
Mr. Wu Qiang is currently an engineer of Shanghai Aircraft Design and Research Institute.
Corresponding author, E-mail address： yangchao@buaa. edu. cn.Dr. Yang Chao is currently a professor at School of Aeronautic Science and Engineering, Beihang University. His major research interests are aeroelasticity, flight dynamics, and aircraft design.
