高超声速飞行器机翼关键部件损伤特性研究

Research on Damage Characteristics of Key Components of Hypersonic Aircraft Wing

为有效预防机翼关键部件损伤对飞行安全的影响,分析了高超声速飞行器机翼关键部件的损伤演化及飞行器飞行动态对损伤的影响。通过建立高超声速飞行器机翼材料的损伤动力学模型以及对机翼翼梁根部载荷应力分析,依次分析了飞行器飞行高度、速度、迎角以及副翼偏转角等变量对机翼关键部件损伤特性的影响,以确定影响损伤的关键变量。分析仿真结果表明,相对于其他变量,飞行器迎角对机翼关键部件损伤的影响最大。从保证飞行器安全和延长寿命的角度分析,应尽量限制飞行器的迎角。从而为减损控制系统设计奠定基础,并为提高飞行器结构的可靠性和延长飞行器寿命提供参考。

To prevent the influence of flight safety caused by damage of key components of hypersonic aircraft wing effectively,the damage evolution of key components of hypersonic aircraft wing and the effects of the flight dynamics to the damage are studied. By establishing the damage model of the aircraft wing based on the material parameters and computing the loading stress of the wing’s root,the effects of flight height,velocity,angle of attack and aileron deflection angle to the damage characteristic are analyzed to determine the crucial variable which affects the damage. Simulation results show that the angle of attack plays a major role in the damage evolution compared with other variables. Therefore,in hypersonic flight,the angle of attack should be limited as far as possible to guarantee the safety of the vehicle and extend its life span. The achieved results lays a solid foundation for the damage-mitigating controller design,which also provides an important reference to enhance the structural reliability and extend the life span for hypersonic aircraft.