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An anti-fall impact energy-absorbing pillar under the floor of an aircraft

A floor and aircraft technology, applied in aircraft floors, aircraft accessories, aircraft parts, etc., to achieve stable energy absorption and high efficiency

Active Publication Date: 2021-10-08
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • An anti-fall impact energy-absorbing pillar under the floor of an aircraft
  • An anti-fall impact energy-absorbing pillar under the floor of an aircraft
  • An anti-fall impact energy-absorbing pillar under the floor of an aircraft

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Experimental program
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Embodiment

[0024] An energy-absorbing pillar for crash resistance under the floor of an aircraft, the structure of which is as follows Figure 1-2 As shown, two left-right symmetrical energy-absorbing struts 5 are installed under the cargo hold floor or passenger cabin floor of a typical cabin section of an aircraft. Initially, they respectively form an angle θ with the vertical direction. The energy-absorbing struts 5 include composite material tubes 11, and the upper ends pass through The bearing 3 and the base lug 2 are connected to the floor beam 1 , and the lower end is connected to the fuselage frame 8 through the fuselage frame connector 10 .

[0025] The connecting end of the composite material pipe 11 and the fuselage frame 8 is sleeved with an inverted connecting cap 6. The inner end surface of the inverted connecting cap 6 is provided with an inverting curved surface 14, and the inverting curved surface is connected with the inner wall of the inverted connecting cap. The compos...

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PUM

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Abstract

The invention relates to an energy-absorbing pillar for anti-falling under the floor of an aircraft. The energy-absorbing pillar includes two symmetrical composite material tubes, which respectively form an angle θ with the vertical direction at the beginning, and one end of each composite material tube passes through a joint bearing. And the support is connected to the beam of the aircraft floor, and the other end is connected to the fuselage frame through the joint bearing and the joint. Compared with the prior art, in the process of aircraft crash, the composite material tube is only subjected to axial force and will not be broken suddenly, the structure can be kept intact, the energy absorption is more stable, and the efficiency is high; The energy absorption capacity of the composite fragments in the compaction stage, and has the advantages of no fragments overflowing during the crushing process.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/18B64C1/06
CPCB64C1/062B64C1/18
Inventor 于哲峰张洋洋
Owner SHANGHAI JIAOTONG UNIV