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Cavity sound absorption wedge complex with metal skeletons

A technology of sound-absorbing wedges and metal skeletons, which is applied in the direction of sound-emitting devices and instruments, can solve problems such as limitations and inapplicability, and achieve the effects of increasing damping loss factors, increasing losses, and enhancing sound-absorbing effects

Pending Publication Date: 2018-01-12
哈尔滨工程大学船舶装备科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing wedge cannot be applied to work in a high hydrostatic pressure environment due to its own strength limitation, the present invention develops a sound-absorbing wedge with excellent sound-absorbing performance and structural strength, which can meet the requirements of water According to the environmental requirements, the technical solution adopted is:

Method used

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  • Cavity sound absorption wedge complex with metal skeletons
  • Cavity sound absorption wedge complex with metal skeletons
  • Cavity sound absorption wedge complex with metal skeletons

Examples

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Embodiment approach 1

[0031] combine Figure 1-3 Describe this embodiment, a hollow sound-absorbing wedge complex with a metal skeleton in this embodiment, the wedge complex includes a sound-absorbing bottom plate A, a sound-absorbing wedge B and n metal skeletons C; The splitter B is fixedly connected above the sound-absorbing floor A; the sound-absorbing wedge B includes a base 1 and a tip 2; the base 1 and the tip 2 are integrally formed; the base 1 is a cuboid; the tip 2 consists of n conical tips The unit 21 is composed; the tip unit 21 is arranged in an array on the upper surface of the base 1, and the tip is upward; the inside of each tip unit 21 is provided with a conical cavity 22; the bottom of the conical cavity 22 extends to the bottom of the base 1 Bottom, and the top port diameter of truncated conical cavity 22 reduces, and along the central axis of truncated conical cavity 22, the tip of wedge unit 21 extends with elongated cavity 23; The wall of each said tip unit 21 One metal skel...

Embodiment approach 2

[0052] This embodiment is further limited to the base portion 1 and the tip portion 2 in the first embodiment. In this embodiment, the height ratio of the base portion 1 to the tip portion 2 is 1:4˜1:5.

[0053] The height ratio of the base part 1 to the tip part 2 defined in this embodiment is 1:4-1:5, and the effect is best when the height ratio of the base part 1 to the tip part 2 is 1:4. The above parameters are all optimized by simulation to obtain the optimal result of the sound absorption coefficient curve in the working frequency band.

Embodiment approach 3

[0055] This embodiment is to further limit the size ratio of the sound-absorbing wedge B in any of the first to second embodiments. In this embodiment, the sum of the heights of the frustum-shaped cavity 22 and the elongated cavity 23 is equal to The height ratio of B is 3:5; the height ratio of the frustum-shaped cavity 22 and the strip-shaped cavity 23 is 2:1.

[0056] The size ratio of the sound-absorbing wedge B defined in this embodiment, the above-mentioned ratio is the result obtained through simulation optimization to obtain the optimal sound absorption coefficient curve in the working frequency band.

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Abstract

The invention relates to a cavity sound absorption wedge complex with metal skeletons, and belongs to the technical field of water environment sound absorption wedges. The wedge complex comprises a sound absorption base plate, a sound absorption wedge and n metal skeletons; the sound absorption wedge is fixedly connected to the upper portion of the sound absorption base plate; the sound absorptionwedge comprises a base and a tip; the tip is composed of n conical tip units; the tip units are arranged on the upper surface of the base in an arrayed mode, and the tip ends face upwards; a circulartruncated cone cavity is formed inside each tip unit; the bottoms of the circular truncated cone cavities extend to the bottom of the base, the caliber of the top ends of the circular truncated conecavities is decreased, and a long-strip-shaped cavity extends to the top end of the wedge unit along the center axes of the circular truncated cone cavities; one metal skeleton is embedded inside thewall of each tip unit or inside the wall defined by the base and each tip unit. The complex has the certain structural strength and the good sound absorption effect. The complex is applicable to underwater environment, such as a noise elimination pool and a aval ship underwater sound platform region.

Description

technical field [0001] The invention relates to a cavity sound-absorbing wedge complex with a metal skeleton, which belongs to the technical field of sound-absorbing wedges in water environment. Background technique [0002] The wedge has the property of gradual transition of impedance. By setting a cavity structure inside it, it has the characteristics of resonant sound absorption. Compared with other sound absorption structures, it has excellent sound absorption performance at low frequencies. It is a good performance sound-absorbing structure. Sound-absorbing wedge structures are widely used in anechoic pools, large anechoic chambers and ships. In particular, laying it on the sonar platform area of ​​the hull does not require sound-transparent wall panels, which can effectively reduce noise interference in the sonar platform area, and has strong engineering application value. Since the 1970s, the research work on sound-absorbing wedges has been carried out in our countr...

Claims

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Application Information

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IPC IPC(8): G10K11/162G10K11/172
Inventor 杨东凯董丹王丽君章丽丽原慜黄文雪杨凯
Owner 哈尔滨工程大学船舶装备科技有限公司
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