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Acoustic anti-icing panel structure for controlling noise in cabin of turbo-propeller plane

A noise control and aircraft cabin technology, applied in the direction of fuselage bulkhead, fuselage insulation, etc., can solve the problems of high sound pressure level, inability to isolate and attenuate the anti-icing plate, affecting the comfort of the aircraft cabin, and achieve aerodynamic performance. The effect of low noise, ensuring the sound insulation capacity of the wall panel, and avoiding the failure of structural performance

Active Publication Date: 2015-03-25
CHINA AIRPLANT STRENGTH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because propeller noise has the characteristics of large sound pressure level and obvious low-frequency characteristics, such double-layer metal-skinned anti-ice plates cannot isolate and attenuate propeller noise, so that propeller noise can be transmitted with little loss. To the passenger cabin, affecting the comfort of the aircraft cabin

Method used

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  • Acoustic anti-icing panel structure for controlling noise in cabin of turbo-propeller plane
  • Acoustic anti-icing panel structure for controlling noise in cabin of turbo-propeller plane
  • Acoustic anti-icing panel structure for controlling noise in cabin of turbo-propeller plane

Examples

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Effect test

Embodiment 1

[0021] Such as figure 1 , figure 2 As shown, a kind of acoustic anti-icing plate structure used for noise control in the cabin of a turboprop comprises an anti-ice panel and an acoustic material inner core attached to the anti-ice panel, and the surroundings of the anti-ice panel are connected with The pneumatic edge sealing is connected in an arc shape, and the other side of the pneumatic edge sealing is connected in an arc shape to the installation edge of the fuselage, and the bottom of the anti-icing panel is also provided with an arc-shaped opening matching the convex structure of the fuselage.

[0022] In this embodiment, the inner core of the acoustic material is installed inside the anti-icing panel, and has a high sound absorption coefficient and sound insulation for low-frequency noise.

[0023] The pneumatic edge banding is designed with an upper arc transition surface and a lower arc transition surface on both sides to reduce structural aerodynamic noise, and the...

Embodiment 2

[0029] Similar to Embodiment 1, an acoustic anti-icing panel structure for noise control in the cabin of a turboprop aircraft includes an anti-icing panel and an acoustic material inner core attached to the anti-icing panel, and the anti-icing panel The four sides of the pneumatic edge seal are arc-shaped connected with the pneumatic edge band, and the other side of the pneumatic edge band is arc-shaped connected with the fuselage installation edge. The bottom of the anti-ice shock panel also has an arc-shaped opening matching the raised structure of the fuselage. .

[0030] In this embodiment, the inner core of the acoustic material is installed on the outside of the anti-icing panel, and has a high sound absorption coefficient and sound insulation for low-frequency noise.

[0031] The pneumatic edge banding is designed with an upper arc transition surface and a lower arc transition surface on both sides to reduce structural aerodynamic noise, and the upper arc transition sur...

Embodiment 3

[0037] Similar to Embodiment 1, an acoustic anti-icing panel structure for noise control in the cabin of a turboprop aircraft includes an anti-icing panel and an acoustic material inner core attached to the anti-icing panel, and the anti-icing panel The four sides of the pneumatic edge seal are arc-shaped connected with the pneumatic edge band, and the other side of the pneumatic edge band is arc-shaped connected with the fuselage installation edge. The bottom of the anti-ice shock panel also has an arc-shaped opening matching the raised structure of the fuselage. .

[0038] In this embodiment, the inner core of the acoustic material is installed both inside and outside of the anti-icing panel, and has high sound absorption coefficient and sound insulation for low-frequency noise.

[0039] The pneumatic edge banding is designed with an upper arc transition surface and a lower arc transition surface on both sides to reduce structural aerodynamic noise, and the upper arc transit...

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Abstract

The invention provides an acoustic anti-icing panel structure for controlling noise in a cabin of a turbo-propeller plane. The acoustic anti-icing panel structure comprises an anti-icing panel and an acoustic material inner core attached onto the anti-icing panel, wherein the periphery of the anti-icing panel is in arc connection with a pneumatic sealing edge; the other side of the pneumatic sealing edge is in the arc connection with a body installation edge; and an arc-shaped opening matched with a raised plane body structure is also formed in the bottom of the anti-icing panel. The acoustic anti-icing panel structure has the characteristics of low pneumatic sound and high sound reduction index, and the sound insulation performance of the wall panel structure can be effectively improved, so that the influence of the propeller noise on a sound field in the cabin of the plane is reduced, and the cabin comfort level of the turbo-propeller plane is improved.

Description

technical field [0001] The invention belongs to the field of aircraft structural acoustic design, and in particular relates to an anti-ice plate structure for noise control. Background technique [0002] The propeller of turboprop aircraft rotates at high speed, and friction with the air produces huge noise; propeller noise has the characteristics of large sound pressure level, obvious low-frequency line spectrum characteristics, strong penetrating power, etc., and spreads along the tangential direction of the outer ring of the propeller; The noise passes through the fuselage sidewall area corresponding to the plane of the propeller, and is transmitted to the cabin of the turboprop aircraft, resulting in loud noise and poor comfort in the cabin of the turboprop aircraft. [0003] At present, when designing anti-ice panels for domestic turboprop aircraft, a layer of metal skin is added to the outer skin area of ​​the fuselage corresponding to the plane of the propeller to pre...

Claims

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Application Information

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IPC IPC(8): B64C1/12B64C1/40
Inventor 侯峰黄文超潘凯李红丽庞彦宾刘兴强秦浩明燕群董宁娟
Owner CHINA AIRPLANT STRENGTH RES INST
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