机翼前缘结构抗鸟撞分析研究

鸟撞是飞机在飞行中遇到的重要危害之一,同时也是一种突发性和多发性的飞行事故,造成了重大的经济损失和人员伤亡。因此,抗鸟撞设计成为飞机设计中必须考虑的要素之一。以机翼前缘缝翼结构为研究对象,通过大型非线性有限元分析软件PAM—CRASH,开展了飞机结构的抗鸟撞仿真设计研究。分析过程考虑了材料的非线性和结构的大变形特性;鸟体在高速撞击下采用SPH方法模拟。通过分析整个结构鸟撞的损伤失效过程,以及各部件能量耗散机理,明确机翼前缘缝翼结构各个部件在抗鸟撞设计中的作用,这些对于我国的大型飞机抗鸟撞设计将有参考价值。

Analysis of Bird-strike Resistance for Wing Leading Edge of Aircraft

Bird strike represents one of the serious flight accidents. It is paroxysmal and universal, usually resulting in a huge economic and life lost. Therefore, bird-strike resistance is one of the necessary considerations in aircraft design. This study is concentrated on the analysis of bird-strike resistance for a wing slat, through a numerical simulation by using commercial nonlinear finite element code PAM-CRASH. The nonlinear properties of the materials and large deformation of the structure are included. The bird is replaced by a SPH model at high speed impact. Through analyzing the bird-striking process and the energy dissipation mechanisms, it is understand clearly that the roles of each components of the wing slat, which will be helpful in designing the bird strike resistance of large aircrafts.