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Porous material-pored corrugated compound light multifunctional sandwich panel and preparation method

A porous material, multi-functional technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve the problems of lack of sound absorption, sound absorption performance and frequency bandwidth to be improved, poor sound insulation performance, etc. To achieve the effect of improving the sound insulation performance

Inactive Publication Date: 2017-11-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sandwich panels are a good sound insulator, but they are not sound absorbing
On the contrary, there are small spaces inside structures such as perforated plates and open-hole porous materials to form sound loss channels, which have good sound absorption performance, but their sound insulation performance is poor, and their sound absorption performance and frequency band at low and medium frequencies below 2000 Hz Width can also be improved
At present, there is no structure that can simultaneously achieve excellent low-frequency and broadband sound insulation and sound absorption performance

Method used

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  • Porous material-pored corrugated compound light multifunctional sandwich panel and preparation method

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preparation example Construction

[0035] A method for preparing a porous material-perforated corrugated composite lightweight multifunctional sandwich panel, comprising the following steps:

[0036] 1) Using a laser punching machine to punch out evenly distributed circular holes on the thin plate, and then mold and fold the perforated thin plate to prepare a perforated corrugated plate 4;

[0037] 2) stacking and connecting the perforated corrugated sheet 4, the perforated sheet 1 and the non-perforated sheet 2 according to the order of the perforated sheet 1, the perforated corrugated sheet 4 and the non-perforated sheet 2;

[0038] 3) Cut the perforated porous material 3 into a trapezoidal prism that matches the perforated corrugated plate 4, fill the trapezoidal prism into the space formed by the perforated corrugated plate 4 and the non-perforated thin plate 2, and use epoxy adhesive to cement the connection interface deal with.

[0039] Further, remove oil stains and rust on the perforated corrugated she...

Embodiment 1

[0042] First, an aluminum plate with a thickness of 1 mm is perforated by a laser cutting machine with a hole diameter of 2 mm and a perforation rate of 0.9%. The perforated board is folded by molding to form a corrugated board with a height of 18mm, see figure 1 . Another aluminum plate with a thickness of 1 mm is perforated by a laser cutting machine with a hole diameter of 2 mm and a perforation rate of 1.4%. A perforated aluminum plate, a perforated corrugated aluminum plate, and another unperforated aluminum plate with a thickness of 1 mm were arranged in sequence by brazing in a vacuum furnace to obtain a perforated aluminum corrugated sandwich panel. Use a cutting machine to cut a piece with a porosity of 97% and a flow resistance of 51200Pa·s / m 2 , the viscous characteristic length is 41 μm, the thermal characteristic length is 59 μm, and the rock wool with the material tortuosity of 1.06 is cut into trapezoidal prisms matching the corrugated sandwich structure, and ...

Embodiment 2

[0044]Firstly, a structural steel plate with a thickness of 1 mm is perforated by a laser cutting machine with a hole diameter of 1.5 mm and a perforation rate of 0.67%. The perforated board is folded by molding to form a corrugated board with a height of 17mm, see figure 1 . Another structural steel plate with a thickness of 1 mm is perforated by a laser cutting machine with a hole diameter of 1.5 mm and a perforation rate of 1.1%. The perforated structural steel, the perforated corrugated steel plate, and another non-perforated structural steel plate with a thickness of 2 mm are sequentially welded by a laser welding machine to obtain a perforated steel corrugated sandwich panel. Use a cutting machine to cut a piece with a porosity of 98% and a flow resistance of 45000Pa·s / m 2 , the viscous characteristic length is 105 μm, the thermal characteristic length is 201 μm, and the sintered metal fiber material with a material tortuosity of 1.05 is cut into trapezoidal prisms tha...

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Abstract

The invention discloses a porous material-pored corrugated compound light multifunctional sandwich panel and a preparation method. The method comprises the following steps: successively welding a pored metal sheet, a pored corrugated sandwich structure and an unperforated metal sheet; filling an opening porous material into a space formed between the pored corrugated sandwich structure and the unperforated metal sheet; compounding the opening porous material and a pored corrugated sandwich panel. Compared with the single narrow band sound absorption or sound insulation property of the other traditional acoustic structure, the structure disclosed by the invention is capable of simultaneously realizing the sound absorption and sound insulation properties in low frequency and wide frequency. Due to the excellent mechanical properties, such as, specific stiffness, strength and shock resistance, of the sandwich panel, the structure disclosed by the invention is an ultra-light multifunctional structure with excellent acoustical and mechanical properties and has significant application prospect in the engineering field.

Description

【Technical field】 [0001] The invention belongs to the noise treatment technology, and relates to a porous material-perforated corrugated composite lightweight multifunctional interlayer board and a preparation method. 【Background technique】 [0002] With the development of society, the noise problem is becoming more and more serious. Noise directly affects the quality of life of human beings, and even has an impact that cannot be underestimated on human psychology, physiology and many other aspects. Therefore, noise is a serious pollution that must be controlled. For many engineering environments such as buildings, automobiles, high-speed trains, and aircraft cabins, in addition to considering the mechanical properties of the structure, sound insulation and sound absorption performance are also very important standards. Sound insulation means that when the sound is transmitted from one side of the structure to the other, the sound energy of the incoming side is smaller than...

Claims

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Application Information

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IPC IPC(8): B32B3/24B32B1/06B32B3/28B32B37/12B32B37/00
CPCB32B3/085B32B3/266B32B3/28B32B37/00B32B37/12B32B2307/102
Inventor 孟晗卢天健辛锋先韩宾唐宇帆
Owner XI AN JIAOTONG UNIV
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