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Reinforced structure of the overall opening

A technology to strengthen structures and nodes, used in aircraft parts, fuselage, transportation and packaging, etc., can solve problems such as affecting mechanical properties

Active Publication Date: 2016-08-03
AIRBUS OPERATIONS (SAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These shapes of openings and perimeter stiffeners are not suitable for reinforced structures as these shapes seriously affect their mechanical properties

Method used

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  • Reinforced structure of the overall opening
  • Reinforced structure of the overall opening
  • Reinforced structure of the overall opening

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Embodiment Construction

[0027] Such as figure 1 As shown, the reinforcing structure 10 comprises nodes 12 where three stiffeners 14.1, 14.2, 14.3 of different orientations intersect. Advantageously, these three reinforcements are oriented in three directions forming an angle of 60° with each other. In this case, all meshes are isosceles triangles. This structure is also called "isogrid" (Isogrid).

[0028] The reinforcements 14.1, 14.2, 14.3 are elements of rectangular cross-section, the width of which is significantly smaller than the length. The sides of the stiffeners 14.1, 14.2, 14.3 are arranged in two parallel planes, the surfaces of these stiffeners are arranged in planes perpendicular to the same plane. For the following description, by stiffener is meant an element of substantially rectangular cross-section, the width of which is significantly smaller than the length.

[0029] According to said variant, this stiffening structure may or may not be combined with a panel block 24 fixed on t...

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PUM

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Abstract

The structure (10) has nodes (12) in which a set of stiffeners (14.1-14.3) of different directions intersects with each other. Surfaces of the set of stiffeners are arranged in planes. An opening (26) is surrounded by a hexagonal belt that is formed by peripheral stiffeners (40). Secondary stiffeners (44) are aligned with the set of stiffeners. The secondary stiffeners have the same cross-section as the peripheral stiffeners. Connecting units e.g. bolts, are arranged between the opening and the hexagonal belt.

Description

technical field [0001] The present invention relates to reinforcement structures for integral openings. Background technique [0002] The aircraft includes a large number of reinforcement structures. [0003] It is thus known that the reinforcement structure comprises a first set of stiffeners oriented in a first direction, for example the longitudinal direction of the aircraft, and a second set of stiffeners oriented in a second direction perpendicular to the first direction. In this case, the area bounded by the stiffeners is also called a square or rectangular mesh pocket or grid. [0004] It is also known that the reinforcing structure comprises three groups of reinforcing structures oriented in a direction of 60°. These structures have isotropic properties which give them desirable mechanical properties. Therefore, French patent application FR 2009 / 0056286 proposes an analytical method for such structures to determine their dimensions. [0005] according to figure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/00
Inventor 保罗·梅西纳热拉尔·库杜恩特皮埃尔·拉鲁梅阿诺·托内勒
Owner AIRBUS OPERATIONS (SAS)