CN112854990A - Broadband ventilation sound insulation window unit structure and application thereof - Google Patents

Broadband ventilation sound insulation window unit structure and application thereof Download PDF

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Publication number
CN112854990A
CN112854990A CN202110178395.4A CN202110178395A CN112854990A CN 112854990 A CN112854990 A CN 112854990A CN 202110178395 A CN202110178395 A CN 202110178395A CN 112854990 A CN112854990 A CN 112854990A
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broadband
ventilation
sound
sound insulation
unit structure
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李勇
王旭
毛东兴
董睿智
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Tongji University
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/20—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise
    • E06B5/205—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise windows therefor
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to a broadband ventilation sound-proof window unit structure and application thereof, wherein the broadband ventilation sound-proof window unit structure comprises an internal resonant cavity (1), a hollow pipe (2) and a thin-wall shell (3), the outer wall of the hollow pipe (2) is fixedly connected with the internal resonant cavity (1), the outer edge of the internal resonant cavity (1) is sleeved with the thin-wall shell (3), the internal resonant cavity (1) comprises a plurality of layers of hollow cylinders which are arranged on the outer wall of the hollow pipe (2) and are stacked up and down and have the same structure and size, the outer edge of the bottom of each layer of hollow cylinder is respectively provided with a horizontal partition plate (11) with a circumferential partition plate (4) and a radial partition plate (5) which are used for dividing each layer of resonant cavity into a plurality of resonant spaces. Compared with the prior art, the invention has the advantages of improved sound insulation effect, wide working frequency band, realization of high-efficiency sound insulation, improvement of effective sound absorption, wide application range and the like.

Description

Broadband ventilation sound insulation window unit structure and application thereof
Technical Field
The invention relates to the technical field of noise treatment equipment, in particular to a broadband ventilation sound insulation window unit structure and application thereof.
Background
In acoustic engineering, achieving both acoustic isolation and free flow of gas remains a significant challenge. The sound barrier may obstruct the transmission of the air flow, while the conventional ventilation barrier is generally designed to have a winding path, but a large pressure difference is brought while ensuring a sufficient noise reduction amount, thereby further reducing the ventilation effect. Acoustic hypersurfaces, an area of research that is of increasing interest, have demonstrated unparalleled ability to tune acoustic wave interactions and unprecedented opportunities for researchers to manipulate sound fields at deep sub-wavelength levels, such as sub-wavelength focusing/imaging, unidirectional sound transmission, anomalous refraction and reflection, and compact sound absorbers. Due to the superiority of manipulating the sound field at sub-wavelengths, the acoustic super-surface provides an effective method for designing an air-permeable sound barrier, and a hollow design consisting of hollow units which are periodically arranged is generated to ensure sufficient air circulation. By using local resonance units (helmholtz resonators, membranes, quarter wave tubes, etc.) or fanno-like resonances, the limitation of tuning large waves in the sub-wavelength range is broken through and acoustic blocking is achieved. Nevertheless, the potential operating mechanisms make them capable of providing only a narrow operating band around the resonant or destructive interference frequencies. Recent studies have shown that broadband absorption at low frequencies can be achieved by coupling multiple lossy resonators with a ventilation barrier. In addition, the barrier made of the hollow spiral units can provide Fano-like interference under a specific frequency band, so that broadband sound insulation is realized in a medium-high frequency range. While these designs have made significant progress in dealing with the broadband problem, the bandwidth is still limited, and their sound insulation bandwidth is typically less than one octave if evaluated by blocking more than 90% of the range of incident energy.
Disclosure of Invention
The present invention aims to overcome the defects of the prior art and provide a broadband ventilation sound insulation window unit structure and an application thereof.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a wide band ventilation sound proof window unit construction, includes inside resonant cavity, hollow tube and thin wall shell, the inside resonant cavity of outer wall fixed connection of hollow tube, the outer fringe cover of inside resonant cavity is equipped with the thin wall shell, the same structure that piles up about, hollow cylinder of size is presented including the multilayer of locating on the hollow tube outer wall to inside resonant cavity, and each layer hollow cylinder's bottom outer fringe is equipped with the horizontal separation board of hoop structure respectively, is equipped with on each layer horizontal separation board to be used for dividing each layer resonant cavity into a plurality of resonance spaces's circumference partition baffle and radial partition baffle.
Inside resonant cavity is including locating eight hollow cylinder that piles up about being on the hollow tube outer wall, and each layer of hollow cylinder's bottom outer fringe is equipped with the horizontal separation board of hoop structure respectively, and each layer horizontal separation board size and structure are the same.
And four circumferential separation baffles of circumferential non-closed structures with different lengths are respectively arranged on each layer of horizontal separation plate, and are arranged at equal intervals by taking the circle center of the hollow pipe as the center. The opening area and the opening position of the non-closed opening of the circumferential separation partition plate arranged on each layer of the horizontal separation plate are the same. Radial separation clapboards are arranged between adjacent circumferential separation clapboards on each layer of horizontal separation clapboard respectively, the outer wall of the circumferential separation clapboard positioned at the outermost side is provided with the radial separation clapboard, and each radial separation clapboard is positioned on the same horizontal line.
And a radial separation baffle plate is arranged at the non-closed opening of the circumferential separation baffle plate on each layer of the horizontal separation plate, and the non-closed opening of the circumferential separation baffle plate is equally divided into two cavity openings with the same opening area by the radial separation baffle plate.
Furthermore, the hollow pipe is a rigid cylindrical hollow pipe, and the thin-wall shell is an annular shell.
The second purpose of the invention is to provide a broadband sound barrier, which comprises a plurality of the broadband ventilation sound insulation window unit structures which are uniformly spliced in a basic mode.
Further, this wide band sound barrier includes a plurality of square frames that evenly splice with basic mode, has inlayed in each square frame wide band ventilation sound proof window cell structure, wide band ventilation sound proof window cell structure and square frame transition fit.
Further, this wide band sound barrier includes a plurality of solid cubes of 1/4 cylindricals of the same size of four corners excision that evenly splice with basic mode, has inlayed in each solid cube wide band ventilation sound proof window cell structure, wide band ventilation sound proof window cell structure and solid cube transition fit.
Compared with the prior art, the broadband ventilation sound insulation window unit structure and the application thereof provided by the invention at least have the following beneficial effects:
1) the broadband ventilation sound-insulation window unit structure based on the synergistic effect of loss and interference is provided with hollow ventilation apertures, the hollow tube is designed to reserve a path for air to directly circulate, the traditional ventilation sound-insulation window is usually formed by paving a sound-absorbing material or a sound-absorbing structure in a zigzag ventilation duct, the flow resistance is increased, the ventilation effect is far less than that of the path for directly ventilating, the design of the broadband ventilation sound-insulation window unit structure based on the synergistic effect of loss and interference can prove that the broadband ventilation sound-insulation window unit structure can break through the limitation of a narrow working frequency range after analyzing the energy loss and interference of the structure, the broadband ventilation sound-insulation window unit structure is also applicable to oblique incidence sound waves at different angles, and the application range of the broadband ventilation sound-insulation window unit structure based on the;
2) the overall structure is divided into 64 carefully designed resonant cavities by utilizing the circumferential partition plates of each layer and the radial partition plates with gradually changed angles of each layer, and high-efficiency sound isolation can be realized based on the loss and interference synergistic effect of the structure by utilizing coherent coupling of the cavities, and meanwhile, effective sound absorption is realized;
3) the invention has simple structure, can realize the high-efficiency energy loss and interference of the structure in the corresponding frequency band by adjusting the separation angle of the radial separation plate so as to achieve the broadband sound insulation effect of a specific frequency band, and can prove that a sample piece with the thickness of 5.3cm (lambda/10) can effectively isolate 90 percent of incident sound wave energy in each direction in the frequency band range of 650Hz-2000 Hz;
4) the radial separating partition plate is arranged on each layer of horizontal separating plate and positioned at the non-closed opening of the circumferential separating partition plate, the non-closed opening of the circumferential separating partition plate is divided into two cavity openings with the same opening area by the radial separating partition plate, the cavity openings are arranged to be capable of communicating the ventilation channel with the internal cavity, so that sound waves enter the cavity to generate resonance, and the adjacent openings of the layers can enable the cavities corresponding to the cavity openings to interact.
Drawings
FIG. 1 is a schematic external structural view of a unit structure of a broadband ventilating and sound insulating window in an embodiment;
FIG. 2 is a schematic view of the internal structure of a unit structure of a broadband ventilating and sound insulating window in an embodiment;
FIG. 3 is a graph showing the loss and interference principle of the unit structure of the broadband acoustic window in the embodiment;
FIG. 4 is a schematic diagram illustrating an energy transmission curve of a unit structure of a broadband ventilating sound-proof window in an embodiment;
FIG. 5 is a graph of experimental energy transmission of the structure of the broadband acoustic window unit in the example;
FIG. 6 is a graph of energy transmission coefficients of a unit structure of a broadband ventilation and sound insulation window in which the oblique incidence angles of sound waves are 0 degrees, 30 degrees and 60 degrees in the embodiment;
FIG. 7 is a schematic structural diagram of a combined sound barrier designed with a unit structure of a broadband ventilation sound-proof window as a basic unit in the embodiment;
FIG. 8 is a schematic structural view of a combined sound barrier of another structure formed by the unit structures of the broadband ventilating sound-proof window of the present invention in an embodiment;
the reference numbers in the figures indicate:
1. the device comprises an internal resonant cavity, 2 parts of a hollow pipe, 3 parts of a thin-wall shell, 4 parts of a circumferential separation partition board, 5 parts of a radial separation partition board, 6 parts of a cavity opening, 7 parts of a broadband ventilation sound insulation window unit structure, 8 parts of a square frame, 9 parts of a ventilation part, 10 parts of a solid wall body, 11 parts of a horizontal separation board.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The invention provides a broadband ventilation sound insulation window unit structure which is realized based on the synergistic effect of loss and interference, and as shown in figures 1 and 2, the structure comprises an internal resonant cavity 1, a hollow tube 2 and a thin-wall shell 3. The hollow tube 2 is a rigid cylindrical hollow tube, the outer wall of the hollow tube 2 is fixedly connected with the internal resonant cavity 1, the outer edge of the internal resonant cavity 1 is sleeved with the thin-wall shell 3, and the thin-wall shell 3 is an annular shell.
The internal resonant cavity 1 comprises eight hollow cylinders which are arranged on the outer wall of the hollow tube 2 and stacked up and down, the size and the shape of each hollow cylinder are the same, and d in fig. 2 is the inner diameter of each hollow cylinder. The bottom outer edge of each layer of hollow cylinder is provided with a horizontal separation plate 11 with a circumferential structure, and the horizontal separation plates 11 are the same in size and structure. The horizontal separation plate 11 first separates the internal cavity 1 into 8-level cavities. D in fig. 1 is the outer diameter of the hollow cylinder. The resonant cavity height of each layer is h (the wall thickness b between each layer).
Each layer of horizontal partition plate 11 is respectively provided with 4 circumferential partition plates 4 with circumferential non-closed structures at equal intervals, the lengths of the adjacent circumferential partition plates 4 are different, but the hollow pipe 2 is used as the same center, and the intervals of the adjacent circumferential partition plates 4 are equal, namely, each layer of resonant cavities are partitioned at equal intervals by the 4 circumferential partition plates 4. The non-closed part is arranged as an opening, and the opening position, angle and size of each circumferential partition plate 4 are the same, namely, the resonant cavities of each layer have the same opening area. To solve the broadband problem by coherent coupling, the openings of the resonators are adjacent to each other (the openings of the resonators in each layer have an area Sn)。
Radial separating clapboards 5 are respectively arranged between the adjacent circumferential separating clapboards 4 of each layer, the outer wall of the circumferential separating clapboard 4 positioned at the outermost side is also provided with the radial separating clapboard 5, and the radial separating clapboards 5 of each layer are positioned on the same horizontal line. Namely, the space formed by the circumferential partition plates 4 is divided into 8 spaces by arranging 4 radial partition plates 5 on each layer; the 8 resonant cavities form 64 resonant cavities in total. The included angles of the radial separating partition plates 5 of the resonant cavities in each layer sequentially show gradient change.
Furthermore, a radial separating partition plate 5 is additionally arranged at the opening of the circumferential separating partition plate 4 on each layer of horizontal separating plate 11, and the opening of the circumferential separating partition plate 4 is divided into two parts by the radial separating partition plate 5, so that the whole structure has 16 cavity openings 6, and the opening areas of the cavity openings 6 are the same. The purpose of the invention is to provide a cavity opening 6 that communicates the ventilation channel with the internal cavity, allowing sound waves to enter the cavity to resonate. The openings are adjacent so that the corresponding cavities interact behind each opening.
In summary, the eight-layer resonators have the same geometry, except that the radial separating partitions 5 are offset (thickness t of the radial separating partitions 5) by an angle (first layer separation angle ψ, angle offset θ of each layer), and the entire structure is actually composed of 64 resonators, which are specifically conceived so that each resonator has its own function (high-efficiency loss or interference), and they together provide excellent sound insulation effect over a wide frequency range.
Based on the structural design, for the broadband ventilating and sound insulating window unit structure based on the synergistic effect of loss and interference, the acoustic performance of the unit structure can pass through the transmission matrix T0By relating the state vectors of the sound field at the input and output parts of the cross-cell, we can obtain
Figure BDA0002941453690000051
Indicating input sound pressure and velocity, T0In order to transfer the matrix, the first transfer matrix,
Figure BDA0002941453690000052
the output end is sound pressure and speed.
Note that the overall performance of the cell is determined by the abrupt cross-sectional changes at the input and output interfaces and the 64 side-branch resonant cavities. Since the cells have a sub-wavelength thickness, the chambers are spaced deepIn the sub-wavelength range, it can further be assumed that all of these resonators share the same position in the middle of the cell. Thus, the transfer matrix T0Can be written as T0＝TfTaTr. Theoretically, the structure is equivalent to a tube of abrupt cross section where all the resonators are installed at the bisecting plane. Matrix Tf/A contribution to the section jump of the first or second half of a test tube of a jump cross-section is described, in which TfRepresents the contribution of the section mutation, T, of the first half of the mutated cross-section tuberRepresents the contribution of the section mutation in the latter half of the mutant cross-section tube:
Figure BDA0002941453690000053
in the formula: k is a radical of0Wave number of sound wave in air, phi0Indicates the opening area of the cell, Lc(0.5 × H + Δ H) is the effective length of the first half or the second half of the abrupt-section tube in consideration of the end correction. Here, the end correction may be set to
Figure BDA0002941453690000054
The matrix Ta represents contributions from 64 side branch resonators. Such closely arranged cavities have a strong coherent coupling effect, resulting in that the total cavity can be regarded as an overall coupled system, the acoustic impedance of which can be calculated in the following way.
First, by replacing all other resonators with hard walls, the acoustic impedance of each resonator can be defined, with reference to the entire coupled system. Thus, the impedance of the resonant cavity in the bulk coupled system can be expressed as Zn＝-jρccccotkcLn/(ξ ρ c). Wherein k isc,ρcAnd ccThe wave number, air density and sound velocity in the cavity, respectively. These parameters (k) take into account the inherent losses caused by viscous and thermal boundary layers in these narrow chambersc,ρc,cc) Now becomes complex. L isnIs the effective length of the cavity n and ξ is the ratio of the cross-sectional area of the cavity to its open area. ρ c is the air impedance, -j is the negative imaginary operator, and cot is the cotangent trigonometric function sign. Then, the total acoustic impedance of the 64 resonators can be obtained:
Figure BDA0002941453690000061
equation (2) gives the impedance of the 64 resonators that are coherently coupled. By further considering the cross-sectional area of the tube S of abrupt cross-section and the total opening area S of the union of all the resonatorsaIt can be derived that:
Figure BDA0002941453690000062
based on equations (1) and (3), the transfer matrix T of the designed meta-element is finally obtained0. Then, the acoustic transmission coefficient T of the metaunit can be directly predicted by the following formula:
T＝(2/|t11+t12+t21+t22|) (4)
wherein t isij(i, j ═ 1,2) is the transfer matrix T0Of (2) is used.
The invention realizes high-efficiency sound insulation based on the synergistic effect of loss and interference. The whole structure is divided into 64 well-designed resonant cavities by utilizing the circumferential partition plates of each layer and the normal partition plates with gradually changed angles of each layer, high-efficiency sound isolation is realized based on the synergistic effect of loss and interference of the structure by utilizing coherent coupling of the cavities, meanwhile, effective sound absorption is realized, the absorption coefficient of the unit at 450-580Hz is greater than 0.5, and interference plays a main role after 600 Hz. Under the synergistic effect of loss and interference, the cell eventually forms an acoustic performance that blocks more than 90% of the incident acoustic energy in the range of 650-2000Hz, i.e. 10dB in transmission loss TL.
In order to verify the effectiveness of the structure of the present invention in isolating acoustic energy, the present embodiment is simulated, and table 1 shows the structural parameters in calculation and simulation.
Table 1 structural parameters in calculations and simulations
D d h b H ψ θ Sn t
100mm 44mm 5.5mm 1mm 53mm 120° 8° 42.3mm2 1mm
Besides theoretical calculation and simulation, the present embodiment also adopts experiments to verify the effectiveness of the structure of the present invention. In the present embodiment, a Sinus-type impedance tube is used for measurement by using a dual-load method, a test sample is 3D printed by using a photosensitive resin material, a test principle is that a transmission coefficient of sound pressure is measured by using a transfer matrix method, and an energy transmission coefficient is calculated on the basis of the transmission coefficient, and this experiment is performed under the condition that the oblique incidence angles of sound waves are 0 °, 30 ° and 60 °, respectively, as shown in fig. 6. As can be seen from the experimental data, more than 90% of the acoustic energy can be isolated in the frequency range of 650-2000 Hz. Compared with the traditional local resonance unit, the broadband structure design enlarges the application range.
Furthermore, in practical applications, the sound barrier is not limited to normal incidence only. In fact, the acoustic meta-surface composed of sub-wavelength units means that the meta-material unit restrains the one-dimensional motion of the acoustic particles along the center, and the incident angle can be neglected. In fig. 7, the transmission coefficients of the sound barrier at different oblique incidence angles are studied by using a simulation calculation method, and the structure still has a broadband sound insulation characteristic under the condition of incidence at a certain angle, and even the oblique incidence sound insulation effect is better in the aspect of the whole sound insulation effect.
The unit structure of the broadband ventilation sound insulation window can construct a ventilation sound insulation barrier with larger volume by combining and processing the basic units, and can be applied to green buildings. When the method is applied to the broadband ventilation sound barrier, the arrangement mode is a mode that a plurality of ventilation sound insulation window units are spliced on the basis. Fig. 7 and 8 show two splicing examples, in fig. 7, the broadband ventilation and sound insulation window unit structures 7 are embedded into the square frame 8 and then arranged, the broadband ventilation and sound insulation window unit structures 7 are in transition fit with the square frame 8, and after splicing, the ventilation area is the area of the hollow center of each broadband ventilation and sound insulation window unit structure 7 plus the redundant areas on the four corners. Fig. 8 is that the broadband ventilation and sound insulation window unit structures 7 are embedded into a solid wall 10, the solid wall 10 is a square structure, then 1/4 cylinders with the same size are cut off at each corner of the solid wall 10, and then the cylinders are spliced, and the ventilation area of the structure is the hollow center of each broadband ventilation and sound insulation window unit structure 7 plus the hollow cylinder formed by combination. The arrangement of the unit structure of the broadband ventilation and sound insulation window applied to the broadband ventilation and sound barrier through basic splicing can be in various forms, and the two splicing modes of fig. 7 and 8 are preferred embodiments of the invention and do not represent the only embodiment.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a wide band ventilation sound proof window unit construction, its characterized in that, includes inside resonant cavity (1), hollow tube (2) and thin wall shell (3), the inside resonant cavity of outer wall fixed connection (1) of hollow tube (2), the outer fringe cover of inside resonant cavity (1) is equipped with thin wall shell (3), the same structure that piles up about, down, the hollow cylinder of size are presented including the multilayer of locating on hollow tube (2) outer wall in inside resonant cavity (1), and each layer hollow cylinder's bottom outer fringe is equipped with horizontal separation board (11) of hoop structure respectively, is equipped with on each layer horizontal separation board (11) to be used for dividing each layer resonant cavity into circumference partition baffle (4) and radial partition baffle (5) in a plurality of resonance spaces.
2. The unit structure of the broadband ventilation and sound insulation window of claim 1, wherein the internal resonant cavity (1) comprises eight hollow cylinders stacked up and down on the outer wall of the hollow tube (2), the bottom outer edges of the hollow cylinders are respectively provided with horizontal partition plates (11) with annular structures, and the horizontal partition plates (11) are identical in size and structure.
3. The unit structure of the broadband ventilation sound-proof window as claimed in claim 2, wherein each layer of the horizontal partition plate (11) is provided with four circumferential partition plates (4) of circumferential non-closed structure with different lengths, and each circumferential partition plate (4) is arranged at equal intervals by taking the center of the hollow pipe (2) as the center.
4. The broadband ventilation and sound insulation window unit structure as claimed in claim 3, wherein the opening area and the opening position of the non-closed opening of the circumferential partition plate (4) arranged on each layer of the horizontal partition plate (11) are the same.
5. The broadband ventilation and sound insulation window unit structure as claimed in claim 4, wherein radial separating partitions (5) are respectively arranged between adjacent circumferential separating partitions (4) on each layer of horizontal separating plate (11), the outer wall of the circumferential separating partition (4) positioned at the outermost side is provided with the radial separating partition (5), and the radial separating partitions (5) are positioned on the same horizontal line.
6. The broadband ventilation and sound insulation window unit structure as claimed in claim 5, wherein a radial separating partition (5) is arranged on each layer of horizontal separating plate (11) at the non-closed opening of the circumferential separating partition (4), and the radial separating partition (5) divides the non-closed opening of the circumferential separating partition (4) into two cavity openings (6) with the same opening area.
7. The broadband ventilation and sound insulation window unit structure according to claim 1, wherein the hollow tube (2) is a rigid cylindrical hollow tube and the thin-walled housing (3) is an annular housing.
8. A broadband sound barrier using the broadband ventilation and sound insulation window unit structure of claim 6, comprising a plurality of the broadband ventilation and sound insulation window unit structures uniformly spliced in a basic manner.
9. The broadband sound barrier of claim 8, wherein the broadband sound barrier comprises a plurality of square frames uniformly spliced in a basic manner, each square frame having the broadband ventilation and sound insulation window unit structure embedded therein, and the broadband ventilation and sound insulation window unit structure is in transition fit with the square frame.
10. The broadband sound barrier of claim 8, wherein the broadband sound barrier comprises a plurality of basic uniformly spliced 1/4-cylinder solid cubes with four cut-outs of the same size, each solid cube having the broadband ventilation and sound insulation window unit structure embedded therein, the broadband ventilation and sound insulation window unit structure being transition-fitted with the solid cube.
CN202110178395.4A 2021-02-09 2021-02-09 Broadband ventilation sound insulation window unit structure and application thereof Pending CN112854990A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113539223A (en) * 2021-07-11 2021-10-22 哈尔滨工程大学 Helmholtz sound absorption device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113539223A (en) * 2021-07-11 2021-10-22 哈尔滨工程大学 Helmholtz sound absorption device
CN113539223B (en) * 2021-07-11 2022-05-06 哈尔滨工程大学 Helmholtz sound absorption device

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