Anti-falling-collision energy absorption support post under airplane floor

Abstract

The invention relates to an anti-falling-collision energy absorption support post under an airplane floor. The energy absorption support post comprises two composite material pipes in left and right symmetrical arrangement. In the initial period, the angle theta is respectively formed between each of the two composite material pipes and the vertical direction; one end of each composite material pipe is connected with a cross beam of the airplane floor board through a joint bearing and a support seat; the other end of each composite material pipe is connected with a machine body frame through ajoint bearing and a connector. Compared with the prior art, the anti-falling-collision energy absorption support post has the advantages that in the airplane falling collision process, the compositematerial pipe only receives axial force; sudden fracture cannot occur; the structure can maintain the completeness; the energy absorption is more stable; the efficiency is high; the energy absorptioncapability of the composite material in the fragment compaction stage is utilized to the maximum degree; the advantages of no fragment overflow in the compaction process and the like are realized.

Description

technical field [0001] The invention relates to the technical field of energy-absorbing structures, in particular to an energy-absorbing support for crash resistance under the floor of an aircraft. Background technique [0002] When a civil aircraft makes an emergency landing, it will have a strong impact on the occupants, and the limit value of the impact load is stipulated in the airworthiness clause. The structural failure behaviors during the crash of a typical civil aircraft cabin structure mainly include: collapse of the substructure of the cargo floor, bending / fracture of the cargo floor beam, bending / fracture of the fuselage frame, crushing of the column under the cabin floor, etc. [0003] The pillar structure under the floor of the cargo hold and the floor of the passenger cabin is usually a C-shaped composite pillar for the composite material fuselage. The triggering of the crush failure and the gradual evolution of the crush are the difficulties in the design. A...

AI Technical Summary

Problems solved by technology

But this patent can only be used in the structure of absorbing impact energy, and this application proposes a kind of scheme of implementing this patent in the structure under the floor of the aircraft

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