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民用客机主要针对巡航外形设计,这就需要通过静气动弹性修正得到型架外形,保证型架外形在设计巡航状态飞行时,气动性能能够恢复到巡航设计状态。本文基于混合网格的N-S方程和结构柔度矩阵方法的耦合求解,发展了大飞机静气动弹性计算方法。根据静气动弹性变形过程的可逆性,结合飞行器质量分布、发动机推力以及巡航飞行重量等设计参数,发展了考虑静气动弹性效应的飞机型架外形修正方法。利用所发展的修正方法,获得了某大型客机巡航飞行的型架修正外形,同时分析了其它飞行工况的弹性气动特性,并通过算例比较验证了本文发展方法的有效性。
Civil aircraft mainly for cruise shape design, which need to be modified by static dynamic elasticity to obtain the frame shape to ensure the frame shape in the design of cruise flight, the aerodynamic performance can be restored to cruise design. In this paper, based on the coupled grid N-S equation and the structural flexibility matrix method, the computational method of static aerodynamic elasticity of large aircraft is developed. According to the reversibility of static-dynamic elastic deformation process and the design parameters of aircraft mass distribution, engine thrust and cruise weight, the aircraft frame shape correction method considering static-dynamic elastic effect was developed. Based on the revised method, the modified profile of the frame of a large passenger aircraft cruise flight was obtained, and the elastic aerodynamic characteristics of other flight conditions were also analyzed. The effectiveness of the development method in this paper was verified by comparison of examples.