典型金属民机机身结构坠撞特性试验

doi:10.7527/S1000-6893.2022.26234

Abstract

Abstract: To verify the crashworthiness of typical metal aircraft fuselage structure, this paper has carried out the fuselage straight segment structure vertical crash test under the velocity of 5.91 m/s. Ground impact load, fuselage deformation, acceleration response of typical positions at fuselage, and dummy response are obtained. The fuselage structure failure mechanism, the regularity of load transfer and the energy absorption characteristics during the crash are analyzed. The crashworthiness design methods of the fuselage are put forward. The experimental study shows that under the impact load the structure of the cabin floor under the beam appears serious deformation and damage, and the fuselage presents a non-symmetrical failure mode. During the impact,the fuselage structure absorbs most of the impact energy through the deformation and fracture of the columns,the deformation and fracture of the frames and the deformation of the beams. Therefore, compared with the peak acceleration at the column, the peak acceleration at the occupant decreases by about 90%. It can be known from the integrated crashworthiness index that the fuselage structure has good crashworthiness at the crash velocity of 5.91 m/s.

Key words: civil aircraft, crashworthiness, drop test, acceleration response, energy absorption

CLC Number:

V271.1

ZHANG Xinyue, XI Xulong, LIU Xiaochuan, BAI Chunyu. Experimental study on crash characteristics of typical metal civil aircraft fuselage structure[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(6): 526234.

References

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Experimental study on crash characteristics of typical metal civil aircraft fuselage structure

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