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Acoustic metamaterial unit, composite structure and preparation of sound-proof flow and enhanced heat transfer

An acoustic metamaterial and composite structure technology, which can be used in sound-producing instruments, musical instruments, stringed instruments, etc., can solve problems such as airtight working bandwidth, and achieve the effects of enhanced work stability, increased service time, and cost reduction.

Active Publication Date: 2019-12-03
黄礼范
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a technical solution that can simultaneously overcome the problem of narrow working bandwidth of the existing film-type acoustic metamaterial structure and air-permeable acoustic metamaterial. Further, the present invention provides a wide frequency isolation Acoustic metamaterial structural unit with good sound effect and good heat dissipation and flow. In the main frequency band of electromechanical noise energy, such as hundreds of Hz, it has excellent sound insulation performance with a wide working frequency band, and can ensure sufficient heat flow and air flow. or liquid flow can pass through

Method used

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  • Acoustic metamaterial unit, composite structure and preparation of sound-proof flow and enhanced heat transfer
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  • Acoustic metamaterial unit, composite structure and preparation of sound-proof flow and enhanced heat transfer

Examples

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Effect test

Embodiment 1

[0142] Example 1 Preparation and Performance Measurement of Basic Acoustic Metamaterial Plate

[0143] Attached below Figure 2-8 The preparation and performance measurement of basic acoustic metamaterial panels are described.

[0144] 1. Preparation of basic acoustic metamaterial plate samples

[0145] Milled using FR-4 fiberglass as figure 2 A frame (8) with a width of 2mm is shown, which contains a series of acoustic metamaterial structural units (14) with the same geometric shape, each unit is a square with an inner side length of 27mm, an outer side length of 29mm, and a thickness of 5mm; also made of FR-4 glass fiber such as figure 2 As shown in the constraining body with holes (11), the frame (8) and the constraining body with holes (11) are rigidly connected by double-arm connecting rods (13), and the specific connection method of the two is integrally formed (milling process) , wherein the diameter of the outer contour of the constrained body (13) with holes is ...

Embodiment 2

[0158] Example 2 Preparation and Performance Measurement of Light and Thin Acoustic Metamaterial Plate

[0159] 1. Preparation of light and thin acoustic metamaterial plate samples

[0160] Such as Figure 9 As shown, a frame (32) with a width of 3 mm and a thickness of 1.5 mm is made by laser cutting with Q235A grade ordinary carbon steel. The frame contains a series of acoustic metamaterial structural units (38) with the same geometric shape, each The unit is a square with an inner side length of 35 mm; the same Q235A grade ordinary carbon steel is used to make a constraining body (35) with holes through laser cutting, and the frame (32) and the constraining body (35) with holes are connected through the double-arm connecting rod (37) Rigid connection, the specific connection mode of the two is integrally formed, wherein the outer contour diameter of the constrained body (35) with holes is 12mm, and the diameter of the upper hole 36 is 7mm, the constrained body (35) and the...

Embodiment 3

[0163] Example 3 Preparation and Performance Measurement of Acoustic Metamaterial Plates Containing Different Parameter Units

[0164] 1. Fabrication of Acoustic Metamaterial Plates Containing Different Parameter Units

[0165] The structure of the acoustic metamaterial plate formed by the combination of in-plane arrays of different parameter units described in Example 3 is shown as Figure 11 As shown, the structural dimensions of the acoustic metamaterial structural units as the basic elements of the array are not exactly the same, and the diameters of the constrained body with holes inside and the diameter of the holes on the constrained body are different. Taking an acoustic metamaterial structural unit (45) as an example, the double-arm connecting rod (44) used to connect the porous constraining body (42) of the acoustic metamaterial structural unit to the frame (39) is as thick as the frame (39) flat, and the structural form is similar to the light and thin acoustic met...

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Abstract

The invention relates to a sound-insulating, ventilating and heat transfer enhancing acoustic metamaterial structural unit, which comprises a frame, wherein a restraining body is arranged inside the frame, and at least one of the upper and lower surfaces of the frame is coated with a thin film; and at least one hole is formed in the restraining body and the thin film. In addition, the invention provides an acoustic metamaterial composite plate and an acoustic metamaterial composite structure comprising the acoustic metamaterial structural unit, as well as a frequency modulation method and an assembly method. The acoustic metamaterial structural unit has sound insulation capability superior to that of an ordinary perforated plate or micro-perforated plate within a broadband, can ensure that sufficient heat flow, air flow or liquid flow can pass through smoothly, and increases heat diffusion rate of fluid media on both sides of holes and accelerates heat convection efficiency through unit localized vibration generated by the structure under excitation of acoustic waves. The acoustic metamaterial structural unit and the array composite structure have the advantages of simple assembly technology and stable working performance.

Description

technical field [0001] The invention relates to an acoustic metamaterial structural unit which is sound-insulating, has flow-through, and can increase heat diffusion rate and convective heat transfer efficiency, and an array composite structure containing it. Structural shells, sound insulation panels, sound insulation covers or mufflers through which a sufficient amount of heat flow, air flow or liquid flow passes smoothly belong to the field of materials. Background technique [0002] Thermal power equipment such as: steam engine, internal combustion engine, gas turbine, etc., large motors, computer mainframes, electrical equipment, and refrigeration equipment have high requirements on the heat dissipation and circulation of the shell structure to ensure the normal operation of the equipment. At the same time, they also need to reduce noise to reduce noise pollution to the environment. [0003] In order to reconcile the contradiction between heat dissipation and flow and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/162
CPCG10K11/162G10D1/14
Inventor 黄礼范王术光
Owner 黄礼范
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