摘要
高超声速飞行器多采用细长体构型、机身/发动机一体化设计,这使得气动、结构与推进系统之间耦合严重。首先,将机身等效为两段固定于质心处的悬臂梁,对弹性振动进行建模;接着分析了弹性变形对高超声速飞行器气动及推进系统特性的影响;进而在考虑弹性变形的基础上,计算了飞行包线,并对包线内各点的配平特性进行了分析。结果表明:弹性变形对飞行器的气动力特性在某些状态影响较大,不可忽略;对飞行特性的影响是使飞行包线范围减小。
Hypersonic vehicle adopts an elongated body configuration and a fuselage/engine integrated design, which makes the coupling between the aerodynamic, structural and propulsion systems severe. Firstly, the fuselage was equivalent to two cantilever beams fixed at the center of mass to model the elastic vibration. Then the influence of elastic deformation on the aerodynamic and propulsion system characteristics of the hypersonic vehicle was analyzed. With the consideration of the elastic deformation, the flight envelope was calculated and the trimming characteristics of each point in the envelope were analyzed. The results show that the elastic deformation has a great influence on the aerodynamic characteristics of the aircraft in some states, which cannot be ignored, and the impact on the flight characteristic is to make the flight envelope range decrease.
作者
刘海平
陈海兵
林伟
LIU Hai-ping;CHEN Hai-bing;LIN Wei(School of Transportation Science and Engineering, BUAA , Beijing 100191, China;Beijing Key Laboratory of Aircraft/Engine Integrated System Safety, Beijing 100191 , China)
出处
《飞行力学》
CSCD
北大核心
2019年第3期9-14,25,共7页
Flight Dynamics
