The invention provides a civil aircraft keel beam structure capable of improving the comprehensive performance of the structure. The civil aircraft keel beam structure arranged in the middle fuselagecomprises a central wing box section structure arranged at the front end, a main landing gear cabin box section structure arranged at the rear end and an H-shaped supporting frame arranged above the main undercarriage cabin box section structure; and the H-shaped supporting frame supports a main landing gear cabin and transmits distributed loads. The undercarriage cabin has a double-closed-chamberstructure formed by an original single-closed-chamber structure, the torsional rigidity of the middle fuselage is improved, deformation at the position is reduced, the area of the undercarriage cabinis increased, and installation space is provided for multiple devices in the undercarriage cabin. The central wing box and the undercarriage cabin section are supported in the normal flight process of an airplane; when the airplane falls and collides, the keel beam makes contact with the ground the structure can be damaged in time, energy generated by collision can be absorbed, so that the overload borne by the body of a passenger is reduced; and thus the survival probability of the passenger in an airplane accident is increased, and the falling adaptability of the airplane is improved.
本发明提供的一种提升结构综合性能的民机龙骨梁结构,位于中机身内部,包括设置在前端的中央翼盒段结构、设置在后端的主起落架舱盒段结构和设置在主起落架舱盒段结构上方的“H”型支撑架,“H”型支撑架对主起落架舱形成支撑,传递分布载荷。起落架舱由原来的单闭室结构形成双闭室结构,提高了中机身的抗扭刚度,并且降低了此处的变形,增大了起落架舱的面积,为起落架舱内诸多的设备提供了安装空间。在飞机正常飞行过程中对中央翼盒及起落架舱段形成支撑,在飞机发生坠撞时,龙骨梁首先接触地面,结构可以及时破坏,吸收撞击所产生的能量,减小乘员身体承受的过载,提高了乘员在飞机事故中的生存概率,改善了飞机的适坠性。
Civil aircraft keel beam structure for improving comprehensive performance of structure
一种提升结构综合性能的民机龙骨梁结构
2020-06-30
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |