CN114044083A - Sound-absorbing vibration-damping sheet for ship passenger cabin - Google Patents
Sound-absorbing vibration-damping sheet for ship passenger cabin Download PDFInfo
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- CN114044083A CN114044083A CN202111202983.3A CN202111202983A CN114044083A CN 114044083 A CN114044083 A CN 114044083A CN 202111202983 A CN202111202983 A CN 202111202983A CN 114044083 A CN114044083 A CN 114044083A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/68—Panellings; Linings, e.g. for insulating purposes
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Abstract
The invention provides a sound absorption and vibration reduction sheet for a ship passenger cabin, which comprises an arc composite sheet, wherein the arc composite sheet is provided with a plurality of sound absorption grooves tangent to the arc surface of the arc composite sheet; the sound absorption groove comprises a first cavity and a second cavity which are communicated with each other and are sequentially formed from the outer side to the inner side of the arc-shaped composite sheet, an elastic thin film layer for isolating the first cavity from the second cavity is arranged at the inner end of the first cavity, a mass block is embedded in the center of the elastic thin film layer, and a composite fiber layer is bonded on one side, away from the second cavity, of the elastic thin film layer; the second cavity comprises an outer cavity and an inner cavity which are connected with the first cavity, a telescopic adjusting rod is fixedly arranged in the center of the bottom end of the inner cavity, and an end block is arranged at the free end of the telescopic adjusting rod; a closed cavity is formed between the end block and the elastic membrane layer. The invention can effectively absorb the noises with different frequencies, thereby achieving the best vibration and noise reduction effect.
Description
Technical Field
The invention relates to the technical field of noise reduction of ship cabins, in particular to a sound-absorbing vibration-damping sheet for a ship cabin.
Background
With the rapid development of the ship manufacturing industry, the noise problems of the propulsion main engine and the diesel generator set in the ship engine room are more and more serious. Because the propulsion power of boats and ships and generating set all arrange in narrow and small cabin, two big noise sources in the cabin: the noise of the main engine and the noise of the generator set are promoted, so that the working environment in the engine room is very severe, and in addition, the working time of crews in the engine room is longer, so that the strong noise not only seriously influences the working efficiency of the crews, damages the physical and psychological health of the crews, but also seriously pollutes the ambient sound environment. Ships make an unpleasant noise when the power machines and auxiliary machines of the ship are running. The safety of going the ship is related to boats and ships noise, and the command can be influenced to noise level high on the ship bridge for example, and the normal work of sonar equipment can seriously be influenced and the detection of underwater target by sonar is disturbed to too high noise in the sonar kuppe. Submarine underwater noise can indicate a detected object to an enemy. Marine noise can also affect the health and environmental comfort of passengers and passengers.
The ship noise is classified into mechanical noise, propeller noise, and hydrodynamic noise. The noise in the engine room is formed by mixing the noise of a propulsion main engine and the noise of a diesel generator set, the noise of a control room of the ship engine room is mainly embodied as mechanical energy which is transmitted in a wave form and is radiated in an air noise mode through a second noise source such as the engine room, sub-pieces and the like, a plurality of ship engine rooms are mostly provided with sound insulation covers to reduce the noise transmitted when the diesel generator set operates, under the condition that the ventilation condition of the engine rooms allows, the whole engine set is isolated by the sound insulation covers, and through actual measurement, after the sound insulation covers are used, the noise is reduced to some extent, but the effect is not obvious.
In view of the above, there is a need for an improved sound absorption and noise reduction sheet structure in the prior art to solve the above problems.
Disclosure of Invention
The invention aims to disclose a sound-absorbing vibration-damping sheet for a ship cabin, which utilizes a sheet, a film and a closed cavity to resonate under the action of sound waves, achieves maximum sound absorption at a resonance frequency and effectively reduces the sound pollution of ship noise to a cabin.
In order to achieve the purpose, the invention provides a sound absorption and vibration reduction sheet for a ship passenger cabin, which comprises an arc composite sheet, wherein the arc composite sheet is provided with a plurality of sound absorption grooves tangent to the arc surface of the arc composite sheet;
the sound absorption groove comprises a first cavity and a second cavity which are communicated with each other and are sequentially formed from the outer side to the inner side of the arc-shaped composite sheet, an elastic thin film layer for isolating the first cavity from the second cavity is arranged at the inner end of the first cavity, a mass block is embedded in the center of the elastic thin film layer, a composite fiber layer is bonded on one side, away from the second cavity, of the elastic thin film layer, and a conical through hole for accommodating part of the mass block is formed in the center of the composite fiber layer;
the second cavity comprises an outer cavity connected with the first cavity and an inner cavity connected with the outer cavity and distributed towards the inner side of the arc-shaped composite sheet, the outer cavity is in a frustum shape, a telescopic adjusting rod is fixedly arranged in the center of the bottom end of the inner cavity, and the free end of the telescopic adjusting rod is provided with an end block which can be attached to the inner wall of the inner cavity and can slide relative to the inner wall of the inner cavity;
a closed cavity is formed between the end block and the elastic membrane layer.
As a further improvement of the invention, the telescopic adjusting rod is provided with an audio detector, and the volume of the closed cavity is adjusted through the telescopic adjusting rod aiming at the noises with different frequencies.
As a further improvement of the invention, the first cavity is gradually contracted from the outer side of the arc composite sheet to the inner side.
As a further improvement of the invention, the outer side of the arcuate composite sheet is coated with an acoustic absorptive coating material.
As a further improvement of the invention, the sound absorption coating material comprises one or more of graphite, hollow micro powder and aluminum oxide powder in combination with silicon rubber.
As a further improvement of the invention, the elastic film layer is prepared by boiling one or a combination of any more of nitrile rubber, silicon rubber or composite rubber.
As a further improvement of the invention, the inner side of the arc-shaped composite sheet is provided with a sound insulation sheet, and the sound insulation sheet is made of ceramic aluminum.
As a further improvement of the invention, the composite fiber layer comprises any combination of a plurality of glass fibers, superfine cotton, glass wool felt, mineral wool felt and wood fibers.
As a further improvement of the invention, the mass block is made of a high-density metal material.
The invention also discloses a vibration reduction and noise reduction method for the sound absorption and vibration reduction sheet of the ship passenger cabin, which comprises the following steps:
step S1: the telescopic adjusting rod adjusts the telescopic amount through the circuit adjusting control device according to the audio value detected by the audio detector, changes the volume of the closed cavity and continuously detects the audio value;
step S2: repeating the step S1, continuously detecting the audio frequency value and calculating the volume size of the closed cavity corresponding to the lowest audio frequency value through calculation;
step S3: and the steps of S1 and S2 are repeated in sequence, and the optimal volume size of the closed cavity is measured according to different noise frequencies.
Compared with the prior art, the invention has the beneficial effects that:
(1) a sound absorption and vibration reduction sheet for a ship cabin is characterized in that an arc-shaped composite sheet is attached to the outer wall of the ship cabin, a plurality of sound absorption grooves tangent to the arc surface of the arc-shaped composite sheet are formed in the arc-shaped composite sheet, so that the sound absorption and vibration reduction effects are achieved, the sound absorption grooves comprise a first cavity and a second cavity, and sound is lost in the form of heat energy in the cavities by utilizing air viscosity and friction resistance in the first cavity and the second cavity, so that resistive sound absorption is achieved; the elastic film layer that the inner of first cavity was equipped with, the central authorities of elastic film layer are inlayed and are equipped with the quality piece, elastic film layer and quality piece constitute film type acoustics metamaterial, can obtain the sound attenuation of broad frequency channel, the end block that sets up in the second cavity passes through the telescopic link and adjusts, adjust with the volume size of the airtight cavity to the elastic film layer rear end, thereby change the sound absorption consumption coefficient that the piece was made an uproar falls in the damping, generally utilize the thin slice, the film, airtight cavity resonates under the acoustic wave effect, reach the biggest sound absorption in resonant frequency department, the effectual sound pollution that reduces the boats and ships noise in to the cabin.
(2) The composite fiber layer is bonded on one side, away from the second cavity, of the elastic film layer, the composite fiber layer can reflect sound on one hand, and provides enough rigidity protection for the elastic film on the other hand, so that noise is weakened, a conical through hole is formed in the center of the composite fiber layer, the through hole with the conical structure can effectively play a role in noise reduction, the first cavity is gradually contracted inwards from the outer side of the arc composite sheet, and good sound absorption and noise reduction can be achieved by the conical structure; the outside coating sound absorption coating material of compound piece of arc, including graphite, hollow miropowder, one or more in the aluminium oxide powder and silicon rubber's combination can effectually carry out first heavy processing to the noise, and the inboard of the compound piece of arc is equipped with the sound insulation piece of making by the ceramic aluminium material and can plays last heavy processing to the noise, and the structure of this piece of making an uproar falls in the damping can carry out multiple processing to the noise, has effectively reduced the influence of low-frequency noise in to the passenger cabin.
(3) Through the audio frequency value that audio detector detected, flexible regulation pole passes through circuit regulation controlling means and adjusts flexible volume to change the volume of airtight cavity, realize falling the noise treatment of making an uproar to the adaptation of different frequency noises, reach the best noise reduction effect.
Drawings
FIG. 1 is a perspective view of a sound absorbing and vibration damping sheet for a passenger compartment of a ship according to the present invention;
FIG. 2 is a schematic left perspective view of a sound absorbing and vibration damping sheet for a passenger compartment of a ship according to the present invention;
FIG. 3 is a schematic view showing the internal structure of a single sound-absorbing groove in a sound-absorbing vibration-damping sheet for a passenger compartment of a ship according to the present invention.
In the figure: 1. an arc-shaped composite sheet; 2. a sound absorbing groove; 3. a telescopic adjusting rod; 4. an end-block; 5. sealing the cavity; 6. a composite fiber layer; 7. an elastic film layer; 8. a mass block; 21. a first cavity; 22. a second cavity; 221. an outer cavity; 222. an inner cavity.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1 to 3, an embodiment of a sound-absorbing and vibration-damping sheet for a passenger compartment of a ship according to the present invention is shown.
Referring to fig. 1, in the present embodiment, a sound absorption and vibration reduction sheet for a ship passenger cabin includes an arc composite sheet 1, where the arc composite sheet 1 is provided with a plurality of sound absorption grooves 2 tangential to an arc surface of the arc composite sheet 1; the sound absorption groove 2 comprises a first cavity 21 and a second cavity 22 which are communicated with each other and are sequentially arranged from the outer side to the inner side of the arc-shaped composite sheet 1, an elastic film layer 7 for isolating the first cavity 21 from the second cavity 22 is arranged at the inner end of the first cavity 21, a mass block 8 is embedded in the center of the elastic film layer 7, a composite fiber layer 6 is bonded on one side of the elastic film layer 7, which is far away from the second cavity 22, and a conical through hole for accommodating part of the mass block 8 is formed in the center of the composite fiber layer 6; the second cavity 22 comprises an outer cavity 221 connected with the first cavity 21 and an inner cavity 222 connected with the outer cavity 221 and distributed towards the inner side of the arc-shaped composite sheet 1, the outer cavity 221 is in a frustum shape, a telescopic adjusting rod 3 is fixedly arranged at the center of the bottom end of the inner cavity 222, and an end block 4 which can be attached to the inner wall of the inner cavity 222 and can slide relative to the inner wall is arranged at the free end of the telescopic adjusting rod 3; a closed cavity 5 is formed between the end block 4 and the elastic membrane layer 7. The telescopic adjusting rod 3 is provided with an audio detector, and the volume of the closed cavity 5 is adjusted through the telescopic adjusting rod 3 according to noises with different frequencies. The first cavity 21 is gradually contracted from the outer side to the inner side of the arc composite sheet 1. The outer side of the arc composite sheet 1 is coated with a sound absorption coating material. The sound absorption coating material comprises one or more of graphite, hollow micro powder and aluminum oxide powder and a combination of silicon rubber. The elastic film layer 7 is prepared by boiling one or a combination of any more of nitrile rubber, silicon rubber or composite rubber. The inboard of compound piece 1 of arc is equipped with sound-proof piece, and sound-proof piece is made by the ceramic aluminium material. The composite fiber layer 6 is formed by combining any multiple of glass fiber, superfine cotton, glass wool felt, mineral wool felt and wood fiber. The mass 8 is a high-density metal material.
It should be noted that, in this embodiment, in the sound absorption and vibration reduction sheet for the ship cabin, the arc-shaped composite sheet 1 is more attached to the outer wall of the ship cabin, and the sound absorption grooves 2 tangent to the arc surface of the arc-shaped composite sheet 1 are formed in the arc-shaped composite sheet 1, so that the sound absorption and vibration reduction effects are achieved, each sound absorption groove 2 specifically comprises a first cavity 21 and a second cavity 22, and the sound is lost in the form of sound absorption and heat energy in the cavities by utilizing the air viscosity and the friction resistance in the first cavity 21 and the second cavity 22, so that the resistance is achieved; elastic film layer 7 that the inner of first cavity 21 was equipped with, elastic film layer 7's central authorities are inlayed and are equipped with quality piece 8, elastic film layer 7 constitutes film type acoustics metamaterial with quality piece 8, can obtain the sound attenuation of broad frequency channel, end block 4 that sets up in the second cavity 22 passes through the telescopic link and adjusts, adjust the volume size of the airtight cavity 5 of elastic film layer 7 rear end, thereby change the sound absorption consumption coefficient of the piece of making an uproar that falls in the damping, utilize the thin slice on the whole, the film, airtight cavity 5 resonates under the acoustic wave effect, reach the biggest sound absorption in resonant frequency department, the effectual sound pollution of boats and ships noise in to the ship storehouse that has reduced.
Referring to fig. 2-3, in this embodiment, a composite fiber layer 6 is bonded to a side of the elastic film layer 7 away from the second cavity 22, the composite fiber layer 6 can reflect sound, provide sufficient rigidity protection for the elastic film, and weaken noise, a tapered through hole is formed in the center of the composite fiber layer 6, the tapered through hole can effectively reduce noise, the first cavity 21 gradually shrinks inward from the outer side of the arc composite sheet 1, and can also achieve good sound absorption and noise reduction processing with a tapered structure; the outside coating sound absorption coating material of compound piece 1 of arc, including graphite, hollow miropowder, one or more in the aluminium oxide powder and silicon rubber's combination, can effectually carry out first heavy processing to the noise, and the inboard of compound piece 1 of arc is equipped with the sound insulation piece of making by the ceramic aluminium material and can plays last heavy processing to the noise, and the structure of this piece of making an uproar falls in damping can carry out multiple processing to the noise, has effectively reduced the influence of low-frequency noise in to the passenger cabin. Through the audio frequency value that audio detector detected, flexible regulation pole 3 adjusts flexible volume through circuit regulation controlling means to change the volume of airtight cavity 5, realize the adaptation noise reduction processing to different frequency noises, reach the best noise reduction effect.
The invention also discloses a vibration reduction and noise reduction method for the sound absorption and vibration reduction sheet of the ship passenger cabin, which comprises the following steps: step S1: the telescopic adjusting rod 3 adjusts the telescopic amount through the circuit adjusting control device according to the audio value detected by the audio detector, changes the volume of the closed cavity 5 and continuously detects the audio value; step S2: repeating the step S1, continuously detecting the audio frequency value and calculating the volume of the closed cavity 5 corresponding to the lowest audio frequency value through calculation; step S3: the steps S1 and S2 are repeated in sequence, and the optimal volume of the closed cavity 5 is measured for different noise frequencies.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A sound absorption and vibration reduction sheet for a ship passenger cabin comprises an arc-shaped composite sheet, and is characterized in that the arc-shaped composite sheet is provided with a plurality of sound absorption grooves tangent to the arc surface of the arc-shaped composite sheet;
the sound absorption groove comprises a first cavity and a second cavity which are communicated with each other and are sequentially formed from the outer side to the inner side of the arc-shaped composite sheet, an elastic thin film layer for isolating the first cavity from the second cavity is arranged at the inner end of the first cavity, a mass block is embedded in the center of the elastic thin film layer, a composite fiber layer is bonded on one side, away from the second cavity, of the elastic thin film layer, and a conical through hole for accommodating part of the mass block is formed in the center of the composite fiber layer;
the second cavity comprises an outer cavity connected with the first cavity and an inner cavity connected with the outer cavity and distributed towards the inner side of the arc-shaped composite sheet, the outer cavity is in a frustum shape, a telescopic adjusting rod is fixedly arranged in the center of the bottom end of the inner cavity, and the free end of the telescopic adjusting rod is provided with an end block which can be attached to the inner wall of the inner cavity and can slide relative to the inner wall of the inner cavity;
a closed cavity is formed between the end block and the elastic membrane layer.
2. The sound-absorbing and vibration-damping sheet for the ship passenger cabin is characterized in that an audio detector is arranged on the telescopic adjusting rod, and the volume of the closed cavity is adjusted through the telescopic adjusting rod according to the noise with different frequencies.
3. The sound-absorbing and vibration-damping sheet for a ship cabin according to claim 1, wherein the first cavity is gradually contracted inward from the outer side of the arc-shaped composite sheet.
4. The sound-absorbing and vibration-damping sheet for a ship's cabin according to claim 1, wherein the outer side of the arc-shaped composite sheet is coated with a sound-absorbing coating material.
5. The sound-absorbing vibration-damping sheet for a ship passenger cabin according to claim 4, wherein the sound-absorbing coating material comprises a combination of one or more of graphite, hollow micropowder, aluminum oxide powder and silicone rubber.
6. The sound-absorbing and vibration-damping sheet for the ship passenger cabin according to claim 1, wherein the elastic film layer is prepared by boiling one or a combination of any more of nitrile rubber, silicone rubber or compounded rubber.
7. The sound-absorbing and vibration-damping sheet for a ship passenger cabin according to claim 1, wherein a sound-insulating sheet is provided on an inner side of the arc-shaped composite sheet, and the sound-insulating sheet is made of ceramic aluminum.
8. The sound-absorbing and vibration-damping sheet for a ship cabin according to claim 1, wherein the composite fiber layer comprises any combination of glass fibers, ultra-fine cotton, glass wool felt, mineral wool felt and wood fibers.
9. The sound absorbing and vibration damping sheet for a passenger compartment of a marine vessel as claimed in claim 1, wherein the mass is a high density metal material.
10. A method of vibration and noise reduction of a sound-absorbing and vibration-damping sheet for a passenger compartment of a ship according to claim 2, comprising the steps of:
step S1: the telescopic adjusting rod adjusts the telescopic amount through the circuit adjusting control device according to the audio value detected by the audio detector, changes the volume of the closed cavity and continuously detects the audio value;
step S2: repeating the step S1, continuously detecting the audio frequency value and calculating the volume size of the closed cavity corresponding to the lowest audio frequency value through calculation;
step S3: and the steps of S1 and S2 are repeated in sequence, and the optimal volume size of the closed cavity is measured according to different noise frequencies.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111202983.3A CN114044083B (en) | 2021-10-15 | 2021-10-15 | Sound-absorbing vibration-damping sheet for ship passenger cabin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111202983.3A CN114044083B (en) | 2021-10-15 | 2021-10-15 | Sound-absorbing vibration-damping sheet for ship passenger cabin |
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| CN114044083A true CN114044083A (en) | 2022-02-15 |
| CN114044083B CN114044083B (en) | 2023-02-28 |
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Cited By (1)
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| CN114475909A (en) * | 2022-02-22 | 2022-05-13 | 广船国际有限公司 | Barrier and boats and ships that noise reduction was used |
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| Publication number | Publication date |
|---|---|
| CN114044083B (en) | 2023-02-28 |
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