基于SPH算法的襟翼鸟撞分析研究

Bird impact analysis of wing inner flap based on SPH method

以某型飞机后缘内襟翼为研究对象,利用有限元软件PAM-CRASH,开展了飞机结构的鸟撞仿真分析研究。分析过程考虑了材料的非线性和结构的大变形,并采用SPH(Smoothed Partical Hydrodynamics)方法模拟高速撞击下的鸟体。利用有限元分析得到不同速度、飞机迎角、襟翼卡位和撞击位置等情形下的后缘内襟翼损伤情况及程度对比,进而得到在鸟撞分析过程中,各因素对于襟翼鸟撞结果的影响。研究结论对飞机结构的抗鸟撞研究有一定的参考价值。

Software PAM-CRASH which is based on explicit integration algorithm was used to study bird impact on wing inner flap structure.Nonlinear of materials and big deformation of structure was taken in consideration.Discreet model was used to simulate the bird at high speeds by SPH method.By observing displacement of some points on different components,it analyzed the procedure of bird impact and concluded the function of wing inner flap structure in bird impact design.It may provide some references to the study of bird impact of large aircraft in our country.