CN114645592A - Sound-absorbing wallboard - Google Patents
Sound-absorbing wallboard Download PDFInfo
- Publication number
- CN114645592A CN114645592A CN202210357318.XA CN202210357318A CN114645592A CN 114645592 A CN114645592 A CN 114645592A CN 202210357318 A CN202210357318 A CN 202210357318A CN 114645592 A CN114645592 A CN 114645592A
- Authority
- CN
- China
- Prior art keywords
- sound
- absorbing
- plate
- hole
- damping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 86
- 238000013016 damping Methods 0.000 claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 229920000742 Cotton Polymers 0.000 claims description 9
- 229920005549 butyl rubber Polymers 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000007767 bonding agent Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 17
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 13
- 238000005192 partition Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 239000011490 mineral wool Substances 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention provides a sound-absorbing wallboard with remarkable sound insulation effect on low-frequency noise and middle-high frequency noise. An acoustical wall panel comprising: a keel member; a first outer laminate; a second outer laminate; the surface of the first sound absorption plate is provided with a plurality of first sound absorption holes, the first sound absorption holes are blind holes, and orifices of the first sound absorption holes face to the first outer layer plate; the surface of the second sound absorption plate is provided with a plurality of second sound absorption holes, the second sound absorption holes are blind holes, and orifices of the second sound absorption holes face to the second outer plate; the first sound absorption plate is provided with a first damping sheet on the surface opposite to the surface provided with the first sound absorption holes, and the second sound absorption plate is provided with a second damping sheet on the surface opposite to the surface provided with the second sound absorption holes. The invention realizes the aggregation and dissipation of sound waves in a wide frequency band through an optimized internal structure, and has obvious sound insulation effect on low-frequency noise and middle and high-frequency noise.
Description
Technical Field
The invention relates to a wallboard, in particular to a sound-absorbing wallboard, and belongs to the technical field of constructional engineering.
Background
With the technological progress and social development, the urban noise sources are gradually increased, people living in cities are difficult to avoid being puzzled by noise, the inner partition wall of a building is a main construction for isolating the external noise of the building, and the types of the inner partition wall are more.
One strand of the built single-layer brick wall is 120mm in thickness, the sound insulation amount is 45db, if the sound insulation amount is further improved, the weight of the brick wall needs to be greatly increased, and if the sound insulation amount of the brick wall with the thickness of 240mm can be increased to 50 db.
The light steel keel partition wall can obviously improve the sound insulation effect due to the interlayer gap structure, has double-sided double-layer 15mm gypsum boards, is filled with 50mm rock wool in the middle, has the sound insulation capacity of 50db, has the total thickness of only 135mm and has the weight far lower than that of a masonry brick wall of 240 mm. Due to the characteristics, the light steel keel partition wall is widely used for the inner partition wall. However, the light steel keel partition wall has a relatively light weight, and has a relatively poor effect of isolating low-frequency noise, and typical low-frequency noise such as noise generated during operation of mechanical components such as elevators and electrical appliances has a relatively large amplitude and a relatively long wavelength, and is difficult to be isolated by the light steel keel partition wall with relatively light weight, for example, at a low frequency of 125hz, the sound insulation of a masonry concrete partition wall can reach 40db, and the sound insulation of the light steel keel partition wall can only reach about 30 db.
Disclosure of Invention
Based on the above background, the present invention is directed to provide a sound-absorbing wall panel having a significant sound-insulating effect against both low-frequency noise and middle-high frequency noise, and to solve the problems described in the background art.
In order to achieve the above object, the present invention provides the following technical solutions:
an acoustical wall panel comprising:
the keel component comprises a plurality of transverse keels and a plurality of vertical keels, the transverse keels and the vertical keels are arranged in a staggered mode and are connected with each other, and each transverse keel is provided with a plurality of vibration damping mass blocks;
the first outer plate is arranged on one side of the keel part;
the second outer layer plate is arranged on the other side of the keel component;
the first sound absorption plate is arranged between the first outer layer plate and the keel component, a plurality of first sound absorption holes are formed in the surface of the first sound absorption plate, the first sound absorption holes are blind holes, and orifices of the first sound absorption holes face to the first outer layer plate;
the second sound absorption plate is arranged between the second outer layer plate and the keel part, a plurality of second sound absorption holes are formed in the surface of the second sound absorption plate, the second sound absorption holes are blind holes, and orifices of the second sound absorption holes face to the second outer layer plate;
the vibration damping mass block is located at a position where the transverse keel is respectively connected with the first sound absorbing plate and the second sound absorbing plate, the first sound absorbing plate and the second sound absorbing plate are provided with a cavity, the first sound absorbing plate is provided with a first damping sheet on the surface opposite to the first sound absorbing hole, the second sound absorbing plate is provided with a second damping sheet on the surface opposite to the second sound absorbing hole, the first sound absorbing hole and the second sound absorbing hole respectively comprise an equal-thickness part located in the center area of the hole and a variable-thickness part surrounding the equal-thickness part, the equal-thickness part is circular in the projection on the surface of the first sound absorbing plate or the surface of the second sound absorbing plate, the projection of the equal-thickness part on the surface of the first sound absorbing plate or the surface of the second sound absorbing plate is in a ring shape, and the thicknesses of all points of the first sound absorbing hole and the second sound absorbing hole are obtained by the following formulas:
wherein h (x) is the thickness of the hole wall at the x position, h0Is the thickness of the constant thickness portion, hmaxIs the maximum thickness of the variable thickness portion, i.e., the thickness of the first sound-absorbing panel or the second sound-absorbing panel, x is the vertical distance from the x position to the central axis of the hole, r0The radius of the projection of the constant-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate, and r is the maximum radius of the projection of the variable-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate.
The first sound absorption hole and the second sound absorption hole with the wall thicknesses which are changed according to the formula are arranged, so that a non-ideal acoustic black hole structure is formed on the surfaces of the first sound absorption plate and the second sound absorption plate, the wave speed of sound waves is gradually reduced along with the reduction of the thickness of the sound absorption hole structure on the surface of the sound absorption plate, the reflection of the sound waves is reduced, most energy of the sound waves is captured and dissipated, the adverse factor of the increase of the reflection coefficient caused by the truncation in the non-ideal acoustic black hole structure is considered, the first damping sheet and the second damping sheet are arranged to respectively compensate the energy concentration effect of the first sound absorption hole and the second sound absorption hole, and the cavity between the first sound absorption plate and the second sound absorption plate is combined, so that the sound absorption wallboard generates an obvious concentration elimination effect on middle-high frequency noise; through setting up the Mass block that shakes in the position of being connected of abatvoix and fossil fragments, the low frequency noise peak value of greatly reducing first abatvoix and second abatvoix conduction widens the frequency band of making an uproar that falls of inhaling the sound wallboard for this inhale the sound wallboard and all have showing the sound insulation effect to low frequency noise and medium and high frequency noise.
Preferably, each first sound absorption hole is opposite to one second sound absorption hole, and the projection profile of the first sound absorption hole on the surface of the first sound absorption plate is the same as the projection profile of the second sound absorption hole on the surface of the second sound absorption plate.
Preferably, the first damping sheets are circular sheet-shaped bodies, each first damping sheet corresponds to one first sound absorption hole, and the diameter of each first damping sheet is the same as the projection diameter of each first sound absorption hole on the surface of the first sound absorption plate; the second damping sheet is a circular sheet-shaped body, each second damping sheet corresponds to one second sound absorbing hole, and the diameter of the second damping sheet is the same as the projection diameter of the second sound absorbing hole on the surface of the second sound absorbing plate.
Preferably, each first damping fin is arranged opposite to one second damping fin, a vibration absorption mass block is arranged between each first damping fin and the corresponding second damping fin, and two opposite surfaces of the vibration absorption mass block are fixedly connected with the first damping fins and the second damping fins respectively. The vibration absorption mass blocks respectively form a dynamic vibration absorption system with the first damping sheets and the second damping sheets which are connected, noise energy on the main structure is transferred to the auxiliary structure of the dynamic vibration absorption system, and is cleared up to reduce the noise energy of the main structure, and in addition, the distribution of the vibration absorption mass blocks between the first sound absorption plate and the second sound absorption plate can also improve the structural strength of the whole sound absorption wallboard.
Preferably, at least one surface of the vibration damping mass is attached to the cross runner, and at least another surface of the vibration damping mass is attached to one of the first and second sound absorbing plates.
Preferably, the vibration damping mass block is a thin steel plate, the vibration damping mass block is connected with the transverse keel in a welding mode, and the vibration damping mass block is bonded with the first sound-absorbing plate or the second sound-absorbing plate through a bonding agent.
Preferably, sound-absorbing cotton with the thickness smaller than the distance between the first sound-absorbing plate and the second sound-absorbing plate is arranged in the cavity between the first sound-absorbing plate and the second sound-absorbing plate. The sound-absorbing cotton can be rock wool, glass wool or other composite materials with sound insulation and noise reduction functions.
Preferably, the transverse keels and the vertical keels are all light steel keels with C-shaped or Z-shaped cross sections.
Preferably, the first outer layer plate and the second outer layer plate are both gypsum boards, the first sound-absorbing plate and the second sound-absorbing plate are both polystyrene boards, and the first damping sheet and the second damping sheet are both butyl rubber sheets.
Compared with the prior art, the invention has the following advantages:
according to the sound-absorbing wallboard disclosed by the invention, the collection and dissipation of sound waves in a wide frequency band are realized through an optimized internal structure, the sound-absorbing wallboard has a remarkable sound insulation effect on low-frequency noise and middle and high-frequency noise, the weighted sound insulation amount can reach more than 60db under the condition that the thickness of the sound-absorbing wallboard is within 150mm, and the sound-absorbing wallboard is particularly suitable for being used as an internal partition wall in a building.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the internal structure of the sound-absorbing wall panel of the present invention;
FIG. 2 is a schematic perspective view of the sound-absorbing wall panel of the present invention;
FIG. 3 is a schematic view of the structure of a seismic mass of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 1;
fig. 5 is a schematic view of the structure of the vibration absorbing mass according to the present invention.
In the figure: 1. a transverse keel; 2. a vertical keel; 3. a first outer laminate; 4. a second outer layer sheet; 5. a first sound-absorbing panel; 6. a second sound-absorbing panel; 7. a vibration damping mass; 8. a first sound absorbing aperture; 9. a second sound absorbing hole; 10. a first damping fin; 11. a second damping fin; 12. a vibration absorbing mass block; 13. and (5) sound absorption cotton.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.
The embodiment of the invention discloses a sound-absorbing wallboard which comprises a keel part, a first outer plate 3, a second outer plate 4, a first sound-absorbing plate 5 and a second sound-absorbing plate 6. The keel component comprises a plurality of transverse keels 1 and a plurality of vertical keels 2, the transverse keels 1 and the vertical keels 2 are arranged in a staggered mode and connected with each other, and each transverse keel 1 is provided with a plurality of vibration damping mass blocks 7. The first outer plate 3 is arranged on one side of the keel member and the second outer plate 4 is arranged on the other side of the keel member. First abatvoix 5 is located between first outer plywood 3 and the fossil fragments part, and first abatvoix 5 surface is equipped with a plurality of first sound absorbing holes 8, and first sound absorbing hole 8 is the blind hole, and the drill way orientation in first outer plywood 3 of first sound absorbing hole 8. The second sound-absorbing board 6 is arranged between the second outer layer board 4 and the keel part, a plurality of second sound-absorbing holes 9 are formed in the surface of the second sound-absorbing board 6, the second sound-absorbing holes 9 are blind holes, and the hole openings of the second sound-absorbing holes 9 face to the second outer layer board 4. The vibration damping mass block 7 is located at a position where the transverse keel 1 is respectively connected with the first sound-absorbing plate 5 and the second sound-absorbing plate 6, the first sound-absorbing plate 5 and the second sound-absorbing plate 6 are provided with a cavity, the first sound-absorbing plate 5 is provided with a first damping sheet 10 on the surface opposite to the surface provided with the first sound-absorbing hole 8, the second sound-absorbing plate 6 is provided with a second damping sheet 11 on the surface opposite to the surface provided with the second sound-absorbing hole 9, the first sound-absorbing hole 8 and the second sound-absorbing hole 9 respectively comprise an equal-thickness part located in the center area of the hole and a variable-thickness part surrounding the equal-thickness part, the equal-thickness part is circular in the projection on the surface of the first sound-absorbing plate 5 or the surface of the second sound-absorbing plate 6, the thicknesses of the hole walls of the first sound-absorbing hole 8 and the second sound-absorbing hole 9 are obtained through the following formulas:
wherein h (x) is the hole wall thickness at the x position, h0Is the thickness of the constant-thickness portion, hmaxIs the maximum thickness of the variable thickness portion, i.e., the thickness of the first sound-absorbing panel or the second sound-absorbing panel, x is the vertical distance from the x position to the central axis of the hole, r0The radius of the projection of the constant-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate, and r is the maximum radius of the projection of the variable-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate.
The optimized internal structure can realize the aggregation and dissipation of sound waves in a wide frequency band, has obvious sound insulation effect on low-frequency noise and middle and high-frequency noise, can weigh the sound insulation amount to be more than 60db under the condition of the thickness of 150mm, and is particularly suitable for being used as an internal partition wall in a building. The following detailed description of embodiments of the invention refers to the accompanying drawings.
An acoustical panel as shown in fig. 1 and 2 comprises a keel member, a first outer plate 3, a second outer plate 4, a first acoustical panel 5 and a second acoustical panel 6.
The keel component comprises a plurality of transverse keels 1 and a plurality of vertical keels 2, wherein the transverse keels 1 and the vertical keels 2 are arranged in a staggered mode and are connected with each other to form a plurality of crossed cross structures. The transverse keels 1 and the vertical keels 2 are all light steel keels with C-shaped cross sections, and certainly, the light steel keels with Z-shaped cross sections can be selected to further improve the sound insulation effect of the sound-absorbing wallboard. The width of the transverse keel 1 and the width of the vertical keel 2 in the embodiment are both 75 mm.
In this embodiment, as shown in fig. 3, each transverse keel 1 is provided with four vibration damping mass blocks 7, specifically, two vibration damping mass blocks 7 are located at a position where the transverse keel 1 is connected to the first sound-absorbing plate 5, and two vibration damping mass blocks 7 are located at a position where the transverse keel 1 is connected to the second sound-absorbing plate 6. At least one surface of the vibration damping mass 7 is attached to the cross member 1, and at least the other surface of the vibration damping mass 7 is attached to one of the first sound-absorbing panel 5 and the second sound-absorbing panel 6. Specifically, the vibration damping mass 7 is a thin steel plate, the vibration damping mass 7 is connected with the transverse keel 1 in a welding mode, and the vibration damping mass 7 is bonded with the first sound-absorbing plate 5 or the second sound-absorbing plate 6 through an adhesive. The vibration-damping mass blocks 7 are arranged at the connecting parts of the sound-absorbing plates and the keels, so that the peak value of low-frequency noise conducted by the first sound-absorbing plate 5 and the second sound-absorbing plate 6 is reduced.
The first outer plate 3 is arranged on one side of the keel member and the second outer plate 4 is arranged on the other side of the keel member. The first outer laminate 3 and the second outer laminate 4 of this embodiment are both gypsum boards, the thickness of which is 12 mm.
As shown in fig. 4, each first sound-absorbing hole 8 is disposed opposite to one second sound-absorbing hole 9, and the projection profile of the first sound-absorbing hole 8 on the surface of the first sound-absorbing plate 5 is the same as the projection profile of the second sound-absorbing hole 9 on the surface of the second sound-absorbing plate 6. First sound absorbing hole 8 and second sound absorbing hole 9 are all including the thickness portion that is located hole central zone's uniform thickness portion and surrounding in the thickness portion that varies of uniform thickness portion, and the projection on first abatvoix 5 surface or second abatvoix 6 surface of uniform thickness portion is circular, and the projection on first abatvoix 5 surface or second abatvoix 6 surface of thickness portion is ring shape, and the pore wall each point thickness of first sound absorbing hole 8 and second sound absorbing hole 9 is reachd by following formula:
wherein h (x) is the thickness of the hole wall at the x position, h0Is the thickness of the constant thickness portion, hmaxIs the maximum thickness of the variable thickness portion, i.e., the thickness of the first sound-absorbing panel or the second sound-absorbing panel, x is the vertical distance from the x position to the central axis of the hole, r0The radius of the projection of the constant-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate, and r is the maximum radius of the projection of the variable-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate.
By arranging the first sound absorption holes 8 and the second sound absorption holes 9 with the wall thicknesses which are changed according to the formula, non-ideal acoustic black hole structures are formed on the surfaces of the first sound absorption plates 5 and the second sound absorption plates 6, the wave speed of sound waves is gradually reduced along with the reduction of the thickness of the sound absorption hole structures on the surfaces of the sound absorption plates, the reflection of the sound waves is reduced, and most energy of the sound waves is captured and dissipated.
In consideration of the adverse factor of the increase in reflection coefficient due to the truncation existing in the non-ideal acoustic black hole structure, the first sound-absorbing plate 5 is provided with a first damper plate 10 on the surface opposite to the surface on which the first sound-absorbing hole 8 is provided, and the second sound-absorbing plate 6 is provided with a second damper plate 11 on the surface opposite to the surface on which the second sound-absorbing hole 9 is provided, by compensating for the energy concentration effect of the first sound-absorbing hole 8 and the second sound-absorbing hole 9 by providing the first damper plate 10 and the second damper plate 11, respectively. First damping fin 10 and second damping fin 11 are the butyl rubber piece, butyl rubber is superior to soundproof cotton materials such as rock wool or glass cotton to the elimination effect of sound wave energy, large tracts of land is used and to be fine noise abatement, but butyl rubber price is far greater than soundproof cotton, therefore the wall body that uses butyl rubber on a large scale can't be born by ordinary family fitment, this embodiment only uses butyl rubber in the sound focus area that first sound absorption hole 8 and second sound absorption hole 9 formed, good noise elimination effect has been reached, greatly reduced use cost again. The first damping pieces 10 are circular plate-shaped bodies, each first damping piece 10 corresponds to one first sound absorbing hole 8, and the diameter of each first damping piece 10 is the same as the projection diameter of each first sound absorbing hole 8 on the surface of the first sound absorbing plate 5. The second damping pieces 11 are circular plate-shaped bodies, each second damping piece 11 corresponds to one second sound-absorbing hole 9, and the diameter of each second damping piece 11 is the same as the projection diameter of each second sound-absorbing hole 9 on the surface of the second sound-absorbing plate 6.
In the present embodiment, in order to optimally set the thicknesses of the first damper 10 and the second damper 11 so that the first damper 10 and the second damper 11 respectively reduce the reflection coefficients of the equal-thickness part regions of the first sound-absorbing hole 8 and the second sound-absorbing hole 9, the thicknesses of the first damper 10 and the second damper 11 can be calculated by performing a back-push calculation according to a calculation formula of the reflection coefficients, and given the value of the reflection coefficient to be achieved, the equivalent loss factor of the first sound-absorbing plate or the second sound-absorbing plate is calculated by the following reflection coefficient formula,
where ω is an angular frequency, E is a young's modulus of the first sound-absorbing panel or the second sound-absorbing panel, ρ is a density of the first sound-absorbing panel or the second sound-absorbing panel, β is a poisson's ratio of the first sound-absorbing panel or the second sound-absorbing panel,
is the equivalent loss factor of the first sound-absorbing plate or the second sound-absorbing plate, and epsilon is a constant in a power function formula of the thicknesses of all points of the hole wall of the sound-absorbing hole, namely
Then the thickness values of the first damping fin 10 and the second damping fin 11 are obtained by the back-stepping calculation through the following calculation formula of the equivalent loss factor,
in the formula, tau is a loss factor of the damping sheet material, a is a ratio of the thickness of the damping sheet to the thickness of the sound absorption plate, and b is a ratio of the Young modulus of the sound absorption plate to the Young modulus of the damping sheet.
In addition, the non-ideal acoustic black hole structures of the first sound-absorbing plate 5 and the second sound-absorbing plate 6 also benefit from the vibration-damping mass blocks 7 at the connecting parts of the sound-absorbing plates and the keel, so that the suppression of low-frequency noise by the acoustic black hole structures is enhanced. Therefore, the noise reduction frequency band of the sound absorption wallboard is widened, so that the sound absorption wallboard has obvious sound insulation effect on low-frequency noise and middle-high frequency noise.
In the embodiment, sound-absorbing cotton 13 with a thickness smaller than the distance between the first sound-absorbing plate 5 and the second sound-absorbing plate 6 is arranged in the cavity between the first sound-absorbing plate 5 and the second sound-absorbing plate 6. The sound absorption cotton 13 may be rock wool, glass wool or other composite materials with sound insulation and noise reduction functions, and in this embodiment, glass wool with a thickness of 45mm is selected.
In order to further enhance the sound insulation effect of the sound-absorbing wall panel, in another embodiment, as shown in fig. 5, each first damper plate 10 is disposed opposite to one second damper plate 11, a vibration-absorbing mass 12 is disposed between each first damper plate 10 and the corresponding second damper plate 11, and two opposite surfaces of the vibration-absorbing mass 12 are fixedly connected to the first damper plate 10 and the second damper plate 11, respectively. Through setting up the mass absorbing mass 12, make it constitute the dynamic vibration absorbing system with first damping fin 10 and the second damping fin 11 that meet respectively, dispel it in order to reduce the noise energy of main structure through shifting the noise energy on the main structure to the accessory structure of dynamic vibration absorbing system on, in addition, the distribution of mass absorbing mass 12 between first abatvoix 5 and second abatvoix 6 arranges the structural strength that can also improve whole sound absorbing wallboard. The sound-absorbing wallboard manufactured by adopting the structure has the thickness within 150mm, can ensure that the weighted sound insulation quantity reaches more than 60db, and has the sound insulation effect obviously superior to that of a common light steel keel gypsum board wall body with the same thickness.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A sound-absorbing wallboard is characterized in that: the method comprises the following steps:
the keel component comprises a plurality of transverse keels (1) and a plurality of vertical keels (2), the transverse keels (1) and the vertical keels (2) are arranged in a staggered mode and connected with each other, and each transverse keel (1) is provided with a plurality of vibration damping mass blocks (7);
a first outer plate (3) provided on one side of the keel member;
the second outer layer plate (4) is arranged on the other side of the keel component;
the first sound absorption plate (5) is arranged between the first outer layer plate (3) and the keel component, a plurality of first sound absorption holes (8) are formed in the surface of the first sound absorption plate (5), the first sound absorption holes (8) are blind holes, and the hole openings of the first sound absorption holes (8) face the first outer layer plate (3);
the second sound-absorbing plate (6) is arranged between the second outer layer plate (4) and the keel part, a plurality of second sound-absorbing holes (9) are formed in the surface of the second sound-absorbing plate (6), the second sound-absorbing holes (9) are blind holes, and the hole openings of the second sound-absorbing holes (9) face the second outer layer plate (4);
wherein, the vibration damping mass block (7) is positioned at the part where the transverse keel (1) is respectively connected with the first sound-absorbing plate (5) and the second sound-absorbing plate (6), a cavity is arranged between the first sound-absorbing plate (5) and the second sound-absorbing plate (6), the first sound-absorbing plate (5) is provided with a first damping sheet (10) on the surface opposite to the first sound-absorbing hole (8), the second sound-absorbing plate (6) is provided with a second damping sheet (11) on the surface opposite to the second sound-absorbing hole (9), the first sound-absorbing hole (8) and the second sound-absorbing hole (9) respectively comprise an equal-thickness part positioned in the center area of the hole and a variable-thickness part surrounding the equal-thickness part, the projection of the equal-thickness part on the surface of the first sound-absorbing plate (5) or the surface of the second sound-absorbing plate (6) is circular, and the projection of the variable-thickness part on the surface of the first sound-absorbing plate (5) or the surface of the second sound-absorbing plate (6) is circular, the thicknesses of all points of the hole walls of the first sound absorption hole (8) and the second sound absorption hole (9) are obtained by the following formula:
wherein h (x) is the hole wall thickness at the x position, h0Is the thickness of the constant thickness portion, hmaxIs the maximum thickness of the variable thickness portion, i.e., the thickness of the first sound-absorbing panel or the second sound-absorbing panel, x is the vertical distance from the x position to the central axis of the hole, r0The radius of the projection of the constant-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate, and r is the maximum radius of the projection of the variable-thickness portion on the surface of the first sound-absorbing plate or the surface of the second sound-absorbing plate.
2. The sound absorbing wall panel of claim 1, wherein: each first sound absorption hole (8) is arranged opposite to one second sound absorption hole (9), and the projection outline of the first sound absorption holes (8) on the surface of the first sound absorption plate (5) is the same as the projection outline of the second sound absorption holes (9) on the surface of the second sound absorption plate (6).
3. The sound absorbing wall panel of claim 1, wherein: the first damping pieces (10) are circular sheet-shaped bodies, each first damping piece (10) corresponds to one first sound absorption hole (8), and the diameter of each first damping piece (10) is the same as the projection diameter of each first sound absorption hole (8) on the surface of the first sound absorption plate (5); the second damping pieces (11) are circular sheet-shaped bodies, each second damping piece (11) corresponds to one second sound absorption hole (9), and the diameter of each second damping piece (11) is the same as the projection diameter of each second sound absorption hole (9) on the surface of the second sound absorption plate (6).
4. The sound absorbing wall panel of claim 1, wherein: each first damping fin (10) is arranged opposite to one second damping fin (11), a vibration absorption mass block (12) is arranged between each first damping fin (10) and the corresponding second damping fin (11), and two opposite surfaces of the vibration absorption mass block (12) are fixedly connected with the first damping fins (10) and the second damping fins (11) respectively.
5. The sound absorbing wall panel of claim 1, wherein: at least one surface of the vibration-damping mass (7) is connected to the cross keel (1), and at least another surface of the vibration-damping mass (7) is connected to one of the first sound-absorbing plate (5) and the second sound-absorbing plate (6).
6. The sound absorbing wall panel of claim 5, wherein: the vibration damping mass block (7) is a thin steel plate, the vibration damping mass block (7) is connected with the transverse keel (1) in a welding mode, and the vibration damping mass block (7) is bonded with the first sound-absorbing plate (5) or the second sound-absorbing plate (6) through a bonding agent.
7. The sound absorbing wall panel of claim 1, wherein: and sound-absorbing cotton (13) with the thickness smaller than the distance between the first sound-absorbing plate (5) and the second sound-absorbing plate (6) is arranged in a cavity between the first sound-absorbing plate (5) and the second sound-absorbing plate (6).
8. The sound absorbing wall panel of claim 1, wherein: the transverse keels (1) and the vertical keels (2) are all light steel keels with C-shaped or Z-shaped cross sections.
9. The sound absorbing wall panel of claim 1, wherein: the first outer layer plate (3) and the second outer layer plate (4) are both gypsum boards, the first sound-absorbing plate (5) and the second sound-absorbing plate (6) are both polystyrene boards, and the first damping sheet (10) and the second damping sheet (11) are both butyl rubber sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357318.XA CN114645592A (en) | 2022-04-01 | 2022-04-01 | Sound-absorbing wallboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210357318.XA CN114645592A (en) | 2022-04-01 | 2022-04-01 | Sound-absorbing wallboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114645592A true CN114645592A (en) | 2022-06-21 |
Family
ID=81997545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210357318.XA Withdrawn CN114645592A (en) | 2022-04-01 | 2022-04-01 | Sound-absorbing wallboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114645592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115482800A (en) * | 2022-09-09 | 2022-12-16 | 南通大学 | Noise reduction structure of hydrogen energy reaction device |
-
2022
- 2022-04-01 CN CN202210357318.XA patent/CN114645592A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115482800A (en) * | 2022-09-09 | 2022-12-16 | 南通大学 | Noise reduction structure of hydrogen energy reaction device |
| CN115482800B (en) * | 2022-09-09 | 2023-08-15 | 南通大学 | Noise reduction structure of hydrogen energy reaction device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3215225A (en) | Laminated acoustic panels with outer metal layers, fibrous core and viscoelastic damping layer | |
| CN1981100B (en) | Construction elements for decreasing acoustic propagation | |
| US8074766B1 (en) | Multi-layer sound attenuating acoustic panel | |
| JPS5947785B2 (en) | soundproofing elements | |
| CN102926476A (en) | Sound insulation board | |
| US20070134466A1 (en) | Sandwich panels with subsonic shear wave speed | |
| CN104499591A (en) | Plate | |
| CN105369936A (en) | Metal sheet light partition wall | |
| CN212053322U (en) | Sound insulation wall structure | |
| CN114645592A (en) | Sound-absorbing wallboard | |
| CN107170438A (en) | A kind of resistive filled type sound-absorbing composite board of density gradient | |
| CN210827890U (en) | Double-layer sound insulation board for subway | |
| CN205276552U (en) | Metal sheet light partition wall | |
| CN206344516U (en) | A kind of novel sound insulating sheet material | |
| JPH1037619A (en) | Sound-proof door | |
| CN210622171U (en) | Vibration-damping sound-insulating assembled external wall panel | |
| CN211523647U (en) | Noise reduction wall building structure | |
| CN209191408U (en) | A kind of automobile-used carbon fiber battenboard | |
| JP4027069B2 (en) | Sound absorbing material | |
| CN209241181U (en) | A kind of automobile dash board based on acoustic metamaterial | |
| CN215405677U (en) | Metal ceramsite composite sound absorption screen board for sound barrier | |
| CN216587462U (en) | Reinforced sound-absorbing rock wool board | |
| CN211058050U (en) | Sound insulation board for building construction external wall | |
| CN215888677U (en) | Environment-friendly and nontoxic sound absorption and insulation body with noise reduction structure | |
| JPH07150749A (en) | Soundproof floor material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20220621 |
|
| WW01 | Invention patent application withdrawn after publication |