An airfoil without a stringer and a rib web and a strength calculation method of the airfoil

Abstract

The invention belongs to an aircraft structure strength calculation technology, and particularly relates to an airfoil without stringers and ribbed webs and a strength calculation method of the airfoil. The airfoil without the stringer and the rib web plate adopts the design without the stringer and the web plate, and comprises a front beam, a middle beam, a rear beam, a rib edge strip and a skin.According to the method for calculating the strength of the airfoil without the stringer and the rib web, the bending moment and the shearing force of the airfoil are concentrated and borne by the front beam, the middle beam and the rear beam, the torque of the airfoil is borne by a closed box section composed of the skin and the three beams, and the strength of the airfoil is calculated according to a load transmission path, and the skin is calculated according to a curved plate tension field. The structural arrangement scheme without stringers and rib webs is adopted, the number of parts, the manufacturing cost and the structural weight can be reduced, meanwhile, the provided airfoil strength calculation method can be used for guiding design and strength calculation of airfoil structures of the type, and the large practical application value is achieved.

Description

technical field [0001] The invention belongs to the calculation technology of aircraft structure strength, and in particular relates to an airfoil without long girders and rib webs and a strength calculation method thereof. Background technique [0002] The traditional aircraft wing surface structure is generally composed of beams, long stringers, skins and ribs. Among them, the long stringers are used to transmit the bending moment of the wing surface, and the main function of the wing ribs is to transmit local aerodynamic loads and maintain the shape of the section. Provide support, usually web ribs with relief holes. For a large four-engine turboprop aircraft with a T-shaped tail, the wing-shaped thickness of the vertical tail is usually very large, and the weight can be reduced by canceling the long stringer and rib web. However, for this kind of airfoil structure without stringers and rib webs, there are no reference structure layout methods and strength calculation me...

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Problems solved by technology

However, for this kind of airfoil structure without long stringers and rib webs, there are no structural layout methods and strength calculation methods for reference at home and abroad, so it is difficult to carry out engineering

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