A main landing gear opening structure of a high-wing general-purpose aircraft

Abstract

The invention relates to a main landing gear opening structure of an upper-wing general-purpose aircraft. The main landing gear opening structure consists of a wing reinforcement frame (1), a main lift reinforcement frame (2), a wing main lift reinforcement frame (3), Ordinary frame (4), fuselage panel (5), multiple sets of longitudinal reinforcement beams (6), lower skin (7), upper skin (8), transition piece (9), left external reinforcement box section ( 10), the right external strengthening box section (11) is formed. The present invention provides a structure which solves the problem that the force transmission route of the lower part of the fuselage is interrupted due to the retraction of the main landing gear into the fuselage. The skin and the reinforced frame form a truss-type box-section structure to withstand most of the bending moment and the axial force caused by the bending moment, and effectively transmit the concentrated load of the main landing gear. The force transmission route is direct and the structural efficiency is high.

Description

technical field [0001] The invention belongs to the fuselage structure design of a retractable landing gear of a general aircraft. Background technique [0002] Existing general-purpose short-distance aircraft generally have a semi-monocoque fuselage structure composed of bulkheads, stringers, and skins. The stringers and bulkheads are used to support the skin, and the skin and stringers together bear the bending moment and axial force. In general, the semi-monocoque fuselage structure arranges a reinforcing frame at the connection between the wing and the main landing gear to transfer the concentrated load and distribute the concentrated load to the fuselage shell. The retraction of the main landing gear into the fuselage interrupts the force transmission route of the lower shell of the fuselage. [0003] Large transport aircraft generally have a lower single-wing structure, and the wing box structure runs through the fuselage structure at the lower part of the fuselage, ...

AI Technical Summary

Problems solved by technology

[0003] Large transport aircraft generally have a lower single-wing structure, and the wing box structure runs through the fuselage structure at the lower part of the fuselage, and the keel beam is arranged to ensure that the fuselage has enough space for the main landing gear compartment to transmit the bending moment of the fuselage, and at the same time compensate the lower part of the fuselage. The load is transmitted by the skin panel, and the fuselage of a general-purpose aircraft is not enough to accommodate the main landing gear. Generally, the main landing gear cannot be retracted.

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