Stressed-skin construction capable of implementing large area deformation

Abstract

The invention provides a skin structure which can realize large-area deformation. The skin structure is formed by grid-knitted skin overlapped structures. Skin overlapped structures clings to each other tightly without any clearance; the side of the skin overlapped structure is provided with a skin take up-pay off structure. The skin structure uses a knitting structure to realize the extensive deformation. In the skin take up-pay off structure, a roller and a skin storage room are used to make the flexible skin roll into or out of the skin take up-pay off structure; in the skin overlapped structure, a multi-slideway structure is adopted to make more layers of flexible skin overlapped into one layer entirely; a skin unit is flexible membrane material and the overlapped skins are in same size; when geometry shape complicated changes happen on the surface of the skin, the skin can be stretched or compressed at large scale without folds or damage simultaneously.

Description

(1) Technical field [0001] The invention relates to aircraft skin technology, in particular to a skin structure capable of large-area deformation. (2) Background technology [0002] At present, the winged aircraft currently in service in various countries in the world basically have immutable wing structures. Only a few models such as the F-111 and F-14 of the United States and the MiG-23 of Russia have variable sweep angles. of. Aircraft with variable wing area that is truly independent of sweep angle do not yet exist. The limited change of the wing area of ​​the above-mentioned several types of aircraft is realized by making a part of the wing surface retract or move out of the fixed part of the wing or the fuselage after the change of the sweep angle. [0003] To realize the deformation of the wing plane, the following two key processes must be the basis: 1. Skeleton deformation; 2. Skin coordination. The internal skeleton structure of the wing is not only the main loa...

AI Technical Summary

Problems solved by technology

However, the collaborative deformation of the skin becomes very difficult, because if it changes from one shape to another, the skin is still fixed according to the original constraint method. Although the skin itself has a certain degree of flexibility, it can be deformed. The extent is very limited. Under such conditions, if the skeleton structure is forced to deform, due to the constraint relationship between the skin and the skeleton, the resistance to deformation of the skeleton will suddenly increase compared with the case without skin, and There are several different failure modes for the skin to occur after deformation is complete

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