阅读说明：本技术 一种微穿孔正交排布矩形管夹芯吸声吸能复合结构 (Micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure ) 是由 卢天健 辛锋先 何伟 提飞 于 2019-09-17 设计创作，主要内容包括：本发明公开了一种应用于装甲车和坦克等降噪的微穿孔正交排布矩形管夹芯吸声吸能复合结构,包括上面板、第一层水平布置矩形管、竖直布置矩形管、第二层水平布置矩形管和下面板。各部件经焊接或者粘接等形成整体结构。上面板、第一层水平布置矩形管和第二层水平布置矩形管上开设有吸音孔,开孔方向垂直于板面。吸音孔与结构内部空腔组成Helmholtz共鸣器吸收噪音。使用时,上面板朝向噪声源安装,下面板背向噪声源。本发明结构简单,制造方便,吸声性能优异以及能够承载和抵御一定的爆炸冲击波损伤,同时兼具重量轻的特点,具有实际工程应用价值。(The invention discloses a micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure applied to noise reduction of armored vehicles, tanks and the like. The components are welded or bonded to form an integral structure. The upper panel, the first layer of horizontally-arranged rectangular pipes and the second layer of horizontally-arranged rectangular pipes are provided with sound absorbing holes, and the hole opening direction is perpendicular to the panel surface. The sound absorption hole and the internal cavity of the structure form a Helmholtz resonator to absorb noise. When the noise-reducing device is used, the upper panel is installed towards a noise source, and the lower panel faces away from the noise source. The invention has the advantages of simple structure, convenient manufacture, excellent sound absorption performance, capability of bearing and resisting certain explosion shock wave damage, light weight and practical engineering application value.)

1. The utility model provides a rectangle pipe presss from both sides core sound absorption energy-absorbing composite construction that micro-perforation quadrature was arranged which characterized in that: include from last to arranging rectangular pipe (2), second floor level to the top panel (1), the first floor level that connect gradually down and arrange rectangular pipe (4) and lower panel (5), the first floor level arrange rectangular pipe (2) and second floor level and arrange rectangular pipe (4) for the rectangular pipe material of a plurality of equidistance orthogonal distributions, it has vertical rectangular pipe (3) of arranging to distribute between the adjacent rectangular pipe material, each part forms overall structure through welding or bonding, top panel (1), first floor level are arranged rectangular pipe (2) and second floor level and are arranged rectangular pipe (4) and have been seted up and inhale the sound hole, constitute mholtz resonator absorbed noise with the inside cavity of structure.

2. The sandwich sound absorption and energy absorption composite structure with rectangular tubes arranged in an orthogonal manner through micro-perforations according to claim 1, is characterized in that: the first layer of horizontally arranged rectangular tubes (2), the vertically arranged rectangular tubes (3) and the second layer of horizontally arranged rectangular tubes (4) have different section sizes.

3. The sandwich sound absorption and energy absorption composite structure with rectangular tubes arranged in an orthogonal manner through micro-perforations according to claim 1, is characterized in that: the diameter of the sound absorbing hole formed in the upper panel (1), the first layer of horizontally-arranged rectangular tubes (2) and the second layer of horizontally-arranged rectangular tubes (4) is 0.1-1 mm, and the hole opening direction is perpendicular to the panel surface.

4. The sandwich sound absorption and energy absorption composite structure with rectangular tubes arranged in an orthogonal manner through micro-perforations according to claim 1, is characterized in that: the material used by the upper panel (1), the first layer of horizontally arranged rectangular pipes (2), the vertically arranged rectangular pipes (3), the second layer of horizontally arranged rectangular pipes (4) and the lower panel (5) is a wooden plate, metal, plastic, porous fiber or porous foam.

5. The sandwich sound absorption and energy absorption composite structure with rectangular tubes arranged in an orthogonal manner through micro-perforations according to claim 1, is characterized in that: and a porous sound absorption material is filled in the cavity in the structure.

6. The sandwich sound absorption and energy absorption composite structure with rectangular tubes arranged in an orthogonal manner through micro-perforations according to claim 1, is characterized in that: the upper panel (1) is installed towards a noise source, and the lower panel (5) is installed back to the noise source.

Technical Field

The invention relates to the field of noise reduction structure design of armored vehicles, tanks and the like, can absorb noise and play a role in bearing and absorbing energy of explosion shock waves, and particularly relates to a rectangular tube sandwich sound absorption and energy absorption composite structure with orthogonal micro-perforated arrangement.

Background

Interior space noise environment such as armoured vehicle and tank is abominable, takes for a long time, and serious discomfort can all appear in passenger's health state and mental state, and then the distraction, drops to external proruption situation's treatment efficiency. The traditional micro-perforated sound absorption plate is made by drilling small holes with the diameter of less than 1mm on a thin plate, has fewer sound absorption peak values and can not obtain good sound absorption effect in a wider frequency band. In addition, armoured vehicles and tanks still face the threat of explosion damage such as land mines in the battle environment, and microperforated panel rigidity intensity is limited, can not resist the damage of explosion shock wave. Therefore, design one kind and fall the performance of making an uproar and excel in and possess the novel structure that bears and resist the shock wave damage in the broad frequency band within range, it is crucial to promoting the riding comfort and the security of armoured car and tank.

Disclosure of Invention

The invention provides a sandwich sound absorption and energy absorption composite structure of rectangular tubes with orthogonal micro-perforation arrangement, which aims to solve the problems of poor sound absorption effect and insufficient rigidity strength of the existing micro-perforation sound absorption plate, has the advantages of simple structure, convenience in processing and light weight, and can absorb noise and bear and resist certain explosion shock wave damage.

A sandwich sound absorption and energy absorption composite structure with rectangular tubes in orthogonal micro-perforated arrangement comprises an upper panel, a first layer of horizontally arranged rectangular tubes, a vertical layer of vertically arranged rectangular tubes, a second layer of horizontally arranged rectangular tubes and a lower panel. The components are welded or bonded to form an integral structure. The upper panel, the first layer of horizontally-arranged rectangular pipes and the second layer of horizontally-arranged rectangular pipes are provided with sound absorbing holes, and the hole opening direction is perpendicular to the panel surface. The sound absorption hole and the internal cavity of the structure form a Helmholtz resonator to absorb noise.

Further, the first layer of horizontally arranged rectangular pipes, the vertically arranged rectangular pipes and the second layer of horizontally arranged rectangular pipes are different in section size and can be adjusted according to design.

Furthermore, the diameters of sound absorption holes formed in the upper panel, the first layer of horizontally-arranged rectangular tubes and the second layer of horizontally-arranged rectangular tubes are 0.1mm-1mm, and the hole opening direction is vertical to the panel surface.

Further, the upper panel, the first layer of horizontally arranged rectangular tubes, the vertically arranged rectangular tubes, the second layer of horizontally arranged rectangular tubes, and the lower panel may be made of wooden plates, metal, plastic, porous fiber, or porous foam.

Further, the structure interior cavity may be filled with a porous sound absorbing material.

Further, in use, the upper panel is mounted towards a noise source and the lower panel faces away from the noise source.

The invention has the beneficial effects that:

1. the upper panel, the first layer of horizontally-arranged rectangular pipes and the micro-perforations on the second layer of horizontally-arranged rectangular pipes form a series of Helmholtz resonator combinations with the cavity in the structure, a plurality of peak values appear on the sound absorption curve of the structure, and the frequency range of which the sound absorption coefficient exceeds 0.5 is widened.

2. The three-dimensional size of the rectangular pipe can be designed, and the mechanical properties inside and outside the surface of the rectangular pipe can be adjusted. The whole structure can bear external load and resist certain damage of explosion shock waves. The sandwich sound absorption and energy absorption composite structure of the rectangular tubes with the orthogonal arrangement of the micro-perforations realizes the integrated design of sound absorption, bearing and shock wave damage resistance, and meanwhile, the sandwich sound absorption and energy absorption composite structure has a simple structure and light weight and has practical engineering application value on armored vehicles, tanks and the like.

Drawings

FIG. 1 is a schematic three-dimensional structure of one embodiment of the present invention;

wherein: 1. an upper panel; 2. the first layer is horizontally provided with rectangular tubes; 3. vertically arranging rectangular tubes; 4. the second layer is horizontally provided with rectangular tubes; 5. a lower panel;

FIG. 2 is a representative unit cell;

wherein:d ₁₁、d ₁₂、d ₂₁、d ₂₂、d ₃₁、d ₄₁andd ₄₂is the diameter of each microperforation in a representative unit cell;

FIG. 3 is a curve of the sound absorption coefficient of the sandwich sound absorption and energy absorption composite structure of rectangular tubes with orthogonal micro-perforated arrangement along with the frequency of incident sound waves.

Detailed Description

The invention will be further explained with reference to the drawings.

The invention discloses a micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure, which comprises an upper panel 1, a first layer of horizontally-arranged rectangular tubes 2, a second layer of horizontally-arranged rectangular tubes 4 and a lower panel 5 which are sequentially connected from top to bottom, wherein the first layer of horizontally-arranged rectangular tubes 2 and the second layer of horizontally-arranged rectangular tubes 4 are a plurality of rectangular tubes which are equidistantly and orthogonally distributed, vertically-arranged rectangular tubes 3 are distributed between adjacent rectangular tubes, and all the components are welded or bonded to form an integral structure. The sound absorbing holes are formed in the upper panel 1, the first layer of horizontally-arranged rectangular pipes 2 and the second layer of horizontally-arranged rectangular pipes 4, and the hole opening direction is perpendicular to the panel surface. The sound absorption hole and the internal cavity of the structure form a Helmholtz resonator to absorb noise.

The rectangular tube sandwich sound absorption and energy absorption composite structure with the orthogonal micro-perforation arrangement can be made of wood plates, metal, plastic, porous fibers or porous foam. Porous sound absorbing material can be filled in the air domain inside the structure, and the purpose of design like this is that utilize the inside hole of porous material to hinder the flow of air, increases the viscidity dissipation and the heat dissipation of air, the sound absorbing capacity of reinforcing structure.

When the micro-perforated orthogonally-arranged rectangular tube sandwich sound absorption and energy absorption composite structure is used, the upper panel is installed towards a noise source, and the lower panel is away from the noise source. The purpose of this design is to allow more noise to enter the structure, partially convert the noise energy into heat energy for dissipation, and reduce the noise energy reflected at the panel.