Sandwich structure having a frequency-selective double-wall behavior

A sandwich structure, double-wall technology, applied in building components, building structures, sound equipment, etc., can solve the problems of single component damage, increase the weight of the sandwich panel, reduce the service life of the sandwich panel, etc., and achieve the effect of light weight

Inactive Publication Date: 2008-07-23
AIRBUS OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This divider cannot be removed after production, which increases the weight of the sandwich panel
Vibrations of the core, separators and outer layers in areas that are not adhesively bonded can lead to damage of individual elements, which in turn reduces the service life of the sandwich panels

Method used

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  • Sandwich structure having a frequency-selective double-wall behavior
  • Sandwich structure having a frequency-selective double-wall behavior
  • Sandwich structure having a frequency-selective double-wall behavior

Examples

Experimental program
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Effect test

Embodiment Construction

[0027] A sandwich structure 1, as shown in FIG. 1, mainly includes a core layer 2, two outer layers 3 and 4 arranged on both sides of the core layer 2, and a core gap 5 arranged in the core layer 2 and occupying the entire height h of the core layer 2 . In the region of the core gap 5 the outer layers 3 and 4 are not supported by the core layer 2 . Depending on how one looks at these areas are also referred to as core interstitial areas or outer layer areas where the outer layers 3 and 4 are not supported by the core layer 2 . Dimension a of the core gap 5 1 and a 2 , on the one hand must be large enough that the acoustic properties of the sandwich structure 1 locally coincide with those of the double wall in the region of the core gap 5 and on the other hand be small enough that the overall acoustic properties of the sandwich structure 1 are preserved. The core layer 2 in this case contains a honeycomb structure from which the core gaps 5 are cut. In principle, it is conc...

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PUM

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Abstract

The invention relates to a sandwich structure (1, 10) which comprises a core (2, 20) and cover layers (3, 4, 30, 40) disposed on both sides of the core (2, 20). Said core (2, 20) is provided with core recesses (5, 50) which are dimensioned in such a manner that the acoustic behavior of the sandwich structure (1, 10) in the area of the core recesses (5, 50) corresponds to the acoustic behavior of a double wall while at the same time maintaining the global acoustic behavior of the sandwich structure (1, 10).

Description

technical field [0001] The invention relates to a sandwich structure comprising a core layer and outer layers on both sides of the core layer. Background technique [0002] Passengers traveling on large aircraft have higher requirements for acoustic comfort. This demand requires better acoustic properties of the cabin wall structure, which in turn requires better wall elements that make up the cabin lining. acoustic properties. The standard material for these nacelle wall elements is a sandwich structure, for example a sandwich panel with a core of honeycomb structure. [0003] The structure of the sandwich panel is shown in the example in Fig. 5. The sandwich panel 100 is composed of a three-layer composite structure, the thickness of the outer layers 300 and 400 of the composite structure are d1 and d2 respectively, and the height of the supporting core layer 200 is h. The outer layers on the upper side 300 and the lower side 400 of the supporting core layer 200 can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/168B61D17/18E04B1/86
CPCB64C1/066B61D17/185B64C1/40E04B1/86E04B2001/8461E04B2001/8476G10K11/172Y02T50/46Y02T50/40
Inventor 克里斯蒂尔·托马斯马丁·汪戴尔
Owner AIRBUS OPERATIONS GMBH
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