Longitudinal beam transmission structure of cargo compartment floor

Abstract

The invention relates to the field of aircraft structural design, in particular to a longitudinal beam transmission structure of a cargo compartment floor. The longitudinal beam transmission structurecomprises a longitudinal cargo compartment floor beam, a diagonal draw rod, a connecting joint, a diffuser, a frame and a long truss. One end of the longitudinal cargo compartment floor beam is connected to the frame and the middle part is hinged with the diagonal draw rod by a bolt. The other end of the diagonal draw rod is hinged to the connecting joint by a bolt; a vertical surface of the connecting joint is fixed with the frame vertically and the bottom surface is fixed with the diffuser; and the diffuser is fixed with the vertical surface of the long truss. Because of formation of the triangular stable structure and the only application of the axial load to the diagonal draw rod, the longitudinal beam reinforcing structure is simple, the weight is light, the processability is high, the cost is low, and the structure is easy to produce and assemble.

Description

technical field [0001] The invention relates to the field of aircraft structure design, in particular to a load-carrying structure of a longitudinal beam of a cargo floor. Background technique [0002] Cargo floor longitudinal beams have poor ability to bear longitudinal loads, and the longitudinal loads need to be dispersed and transferred to the fuselage structure. Most of the longitudinal loads of the existing aircraft are transmitted through the side wall plates, the load transmission path is long, and the efficiency is low. Most of the reinforcement structures connected with the lower wall plates are fixed connections, which are complex in structure and heavy in weight. The invention aims at transferring the longitudinal loads of the cargo floor stringers to the fuselage substructure. There is a height difference between the longitudinal beam of the cargo floor and the lower part of the fuselage, and the load is transmitted in parallel to the lower part of the fuselage...

AI Technical Summary

Problems solved by technology

There is a height difference between the longitudinal beam of the cargo floor and the lower part of the fuselage, and the load is transmitted in parallel to the lower part of the fuselage, which is easy to generate additional bending moments, which increases the complexity of the bearing structure of the lower part of the fuselage, and the structure is reinforced due to the increase in load. Increase

Therefore, it is required to strive for direct force transmission, high efficiency, simple and reliable structure, and no additional bending moment transmitted, which will affect the layout of the original structure.

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