Energy absorption scheme and layout mode of lower square tube supporting rod structure of passenger cabin floor of civil aircraft

Abstract

The invention discloses an energy absorption scheme and a layout mode of a lower square tube supporting rod structure of a passenger cabin floor of a civil aircraft. A square tube is used as a structure with high energy absorption efficiency and is applied to design of an energy absorption structure for the body of the civil aircraft. The supporting rod structure is positioned on the lower part of the passenger cabin floor and has the main effect of supporting the passenger cabin floor; the upper part and the lower part of the supporting rod structure are riveted with the lower parts of a passenger cabin floor beam and a body bulkhead respectively; and the lower part of the supporting rod is connected with the body bulkhead by using a reinforcing ribbed plate. The layout mode of the supporting rod structure is that the supporting rod is vertically arranged, and the junction of the lower part of the supporting rod structure and the body bulkhead is positioned at a position of quarter circular arc of the lower bulkhead of the passenger cabin floor of the body. The invention provides the scheme in which the square tube structure is used as the lower supporting rod of the passenger cabin floor, so that the crashworthiness of the body structure can be greatly improved, and the structural design of the original body is not required to be changed.

Description

technical field [0001] The invention belongs to the technical field of fuselage structure design of civil aircraft, and in particular relates to the energy absorption scheme design and layout of the strut structure at the lower part of the cabin floor. Background technique [0002] Crashworthiness is a key issue that must be solved in the design and research of civil aircraft, and is a major aspect of the design and development of civil aircraft. Crashworthiness design issues, and energy absorbing structure design is one of the core issues of crashworthiness design of civil aircraft fuselage structure. [0003] Various high-performance energy-absorbing structures, such as corrugated beams, foams, and thin-walled pipe structures, are widely used in the crashworthiness design of civil aircraft landing gear systems, fuselage structures, and passenger seating systems. For large and medium-sized civil aircraft, the energy absorption structure design of the fuselage structure is ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the design problem of the energy absorption structure of the fuselage structure of the civil aircraft at present, and studies the energy absorption scheme and layout mode of the strut structure at the lower part of the cabin floor

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