Main wing surface structure of large aspect ratio wing

Abstract

The invention relates to a main wing surface structure of large aspect ratio wing, and belongs to the field of aviation. The main wing surface structure with the large aspect ratio comprises a honeycomb sandwich upper wall panel 1, a cap type reinforced lower wall panel 2, a box type main beam 3, a rear wall 4, a leading edge skin 5, a wing rib 6 and an adhesive 7. The honeycomb sandwich upper wall panel 1 is of a sandwich structure co-cured by carbon fiber composite inner and outer panels and a lightweight paper honeycomb. The cap-type reinforced lower wall panel 2 is of a cap type reinforcedstructure integrally cured by a carbon fiber composite skin and a foam core. The box type main beam 3 is of an integrated structure co-cured by adhering carbon fiber composite materials. The rear wall 4, the leading edge skin 5 and the wing rib 6 are of a carbon fiber composite press plate structure. The adhesive 7 is a room temperature curing paste adhesive. According to the respective bearing characteristics, each component adopts the corresponding structural form, which fully exerts the weight loss advantage of the composite material, and effectively solves the contradiction between the high load bearing and the light weight of the main wing surface structure of large aspect ratio wing.

Description

technical field [0001] The invention belongs to the field of aviation, and in particular relates to a large-aspect-ratio wing main airfoil structure. Background technique [0002] Due to the stringent requirements on range, endurance and economy, long-endurance UAVs generally use wings with a large aspect ratio to obtain a large lift-to-drag ratio. The main airfoil structure is the main load-bearing structure of a wing with a large aspect ratio. In addition to bearing local aerodynamic loads, it also transmits the overall bending moment and torque of the whole aircraft. In order to further increase the voyage and prolong the endurance time, the structural weight is required to be as light as possible. High load and light weight are a pair of contradictions, which brings difficulties to structural design. For medium and low speed UAVs with large aspect ratio, the wing is generally a beam-type thin-skin structure, and its upper and lower skins are thin, which is mainly used ...

AI Technical Summary

Problems solved by technology

[0003] (1) The wing with a large aspect ratio has the characteristics of severe compression on the upper surface and main tension on the lower surface. The stability of the upper skin is prominent, and the shape-dimensional effect of the thin skin is poor, requiring more ribs. In collecting aerodynamic loads and assisting shape maintenance, a large weight price is paid;

[0004] (2) The wing box formed by the "I" shaped main beam and thin skin has poor torsional performance, which is not conducive to torque transmission;

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