The invention provides an aircraft fuselage floor lower portion energy absorption stand column combined structure, and relates to the technical field of aircraft energy absorption structures. The aircraft fuselage floor lower portion energy absorption stand column combined structure comprises a floor lower portion cross beam, the lower side wall of the floor lower portion cross beam is fixedly connected with a floor lower portion cap-shaped connecting structure through bolts, and the floor lower portion cap-shaped connecting structure comprises a fuselage floor lower portion floor beam connecting area and a C-shaped stand column element upper end connecting area. The C-shaped stand column element upper end connecting area is fixedly connected to the upper end of the C-shaped stand column element, and a machine body frame cap-shaped connecting structure is arranged at the lower end of the C-shaped stand column element. By means of the shear pin triggering device arranged in the cap-shaped connecting structure, the problem that an original composite material C-shaped stand column structure is prone to local buckling, brittle fracture, overall instability and other non-ideal energy absorption modes in the impact process is solved, the composite material C-shaped stand column structure loses efficacy in a stable progressive shear mode, the energy absorption capacity of the composite material C-shaped stand column structure is improved, and the service life of the composite material C-shaped stand column structure is prolonged. And the overall anti-falling and anti-collision performance of the fuselage structure is improved.
本发明提供一种航空器机身地板下部吸能立柱组合结构,涉及航空器吸能结构技术领域。该航空器机身地板下部吸能立柱组合结构,包括地板下部横梁,所述地板下部横梁下侧壁通过螺栓与地板下部帽状连接结构固定连接,所述地板下部帽状连接结构包括机身地板下部地板梁连接区、C型立柱元件上端连接区,所述C型立柱元件上端连接区固定连接在C型立柱元件上端,所述C型立柱元件下端设置有机身框帽状连接结构。通过帽状连接结构内置的剪切销触发装置,改善了原有复合材料C型立柱结构在冲击过程中易于发生局部屈曲、脆性断裂、整体失稳等不理想吸能方式的问题,使得其以稳定的渐进剪切形式失效,增加复合材料C型立柱结构的吸能能力,进而提升机身结构整体抗坠撞性能。
Aircraft fuselage floor lower portion energy absorption stand column combination structure
一种航空器机身地板下部吸能立柱组合结构
28.07.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |
AIRCRAFT FUSELAGE PORTION COMPRISING MOVABLE OR DETACHABLE UNDER FLOOR STRUTS
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