Noise reduction system for composite structures
AssigneeThe Boeing Company
InventorsGopal Prasad Mathur, Cliff L. Chin
Life of this patent
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Abstract
A method and apparatus comprising a composite panel and a number of structures to reduce noise radiation from the composite panel. The composite panel has a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet. The number of structures is associated with the first face sheet. The number of structures has a mass with a configuration to reduce a speed of waves propagating in the composite panel such that noise radiating from the composite panel is reduced.
Claims14
An apparatus comprising:
- a composite panel having a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet;
- and
- a number of structures associated with the first face sheet, the number of structures having a mass with a configuration to reduce a speed of waves propagating in the composite panel such that noise radiating from the composite panel is reduced, the number of structures comprising a number of patches attached to an inner surface of the first face sheet, the core including a number of voids, the number of patches located in the number of voids, and the number of voids and the number of patches configured to provide gaps between the number of patches and the core.
A method for reducing noise radiation from a composite panel, the method comprising:
- causing waves to propagate through the composite panel comprising a first face sheet, a second face sheet, and a core located between the first face sheet and the second face sheet;
- and
- reducing a speed of the waves propagating through the composite panel with a number of structures associated with the first face sheet, the number of structures having a mass with a configuration to reduce the speed of the waves propagating in the composite panel such that the noise radiating from the composite panel is reduced, the number of structures comprising a number of elongate members having the mass, the number of elongate members attached to an inner surface of the first face sheet and further comprising a number of voids in the core, the number of elongate members located in the number of voids in the core and the number of voids and number of elongate members configured to provide a number of gaps between the number of elongate members and the core.
Dependencies are inferred from the claim text.