CN104966511A - Binary embedded cylinder cavity sound absorption covering layer - Google Patents
Binary embedded cylinder cavity sound absorption covering layer Download PDFInfo
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- CN104966511A CN104966511A CN201510457352.4A CN201510457352A CN104966511A CN 104966511 A CN104966511 A CN 104966511A CN 201510457352 A CN201510457352 A CN 201510457352A CN 104966511 A CN104966511 A CN 104966511A
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Abstract
The invention discloses a binary embedded cylinder cavity sound absorption covering layer. The covering layer comprises a damping layer (1), a reinforcing layer (2) and a sound absorption layer (3) which are arranged in order. One side of the damping layer (1) fits a housing surface of an underwater moving body. Hollow cylinders (5) are inlaid in the sound absorption layer (3) in an array manner. The sound absorption layer and the hollow cylinders are made of unused materials. The problem of poor low-frequency sound absorption performance caused by employing of a single material is solved. One side of the damping layer fits the housing surface of the underwater moving body, relative sliding of the sound absorption cover layer and the housing surface of the underwater moving body is avoided effectively, and vibration damping and sound absorption effects can be achieved. Through the reinforcing layer, the whole sound absorption covering layer has a certain mechanical strength. The sound absorption layer can employ original materials, through inlaying of the hollow cylinders, the resonance frequency is lowered, but pressure resistance and other performances of the sound absorption layer are not changed.
Description
Technical field
What the present invention relates to is a kind of device of vibration and noise reducing, and specifically the embedded cylindrical cavity anechoic coating of a kind of binary, belongs to vibration and noise reducing apparatus field.
Background technology
Sound wave be only in ocean can the form of energy of long-distance communications, in current and predictable future, undersea detection will rely on the change of detection sound field.Therefore, the major measure that self radiated noise and sound reflection characteristics just become underwater moving body Sound stealth is reduced.
Reduce self radiated noise and sound reflection characteristics is a systematic engineering of business, need to carry out overall acoustic design.Anechoic coating, as the outermost acoustic protection layer of underwater moving body, can not only absorb most detection sound wave, can also reduce self-noise to a certain extent to external radiation.
Current underwater sound absorption overlayer is made up of the single elastomeric material with high loss usually, and be made into and include the flat board of given shape cavity as cylindrical cavity, this class formation has good sound absorbing capabilities in certain frequency band.But this class formation sound sucting band is narrower, obtain broad band sound absorption effect if want, its structural thickness is sufficiently long.And the low frequency absorption performance of this class formation is not good enough yet, to improve low frequency absorption characteristic, the resonant frequency of internal cavities just must be reduced.Select the material of low sheraing wave-wave speed can reduce the resonant frequency of cavity, but such material is generally softer, withstand voltage properties is very poor, can not use as the base material of anechoic coating.In addition, most of anechoic coating adopts adhesive or coating method to be arranged on rigid structure surface, complicated construction technique, and the engineering time is long.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of binary embedded cylindrical cavity anechoic coating, can effectively improve low frequency absorption performance, and have certain noise reduction performance concurrently, ensure the withstand voltage properties of anechoic coating simultaneously.
The object of the invention is to be achieved through the following technical solutions:
The embedded cylindrical cavity anechoic coating of a kind of binary, comprise the damping layer, enhancement Layer and the absorbent treatment that set gradually, the side of described damping layer and the surface of shell of underwater moving body fit, and described absorbent treatment is inlaid with hollow cylinder in array-like.
Preferably, described absorbent treatment is provided with sealing layer.Sealing layer is used for sealing described hollow cylinder.
Preferably, the endoporus of described hollow cylinder is straight cylindrical surfaces or circular conical surface.
Further, the cylindrical of described hollow cylinder is straight cylindrical surfaces or circular conical surface.
Preferably, described damping layer adopts butyl rubber to make, and described enhancement Layer adopts glass fabric to make, and described absorbent treatment and sealing layer adopt butyl rubber or polycarbamate to make, and described hollow cylinder adopts silicon rubber to make.
Preferably, described damping layer, enhancement Layer, absorbent treatment and sealing layer are integrated hot-forming.
Optionally, described damping layer, enhancement Layer, absorbent treatment and sealing layer successively by bonding agent bonding and one cold briquetting.
Compared with prior art, beneficial effect of the present invention is as follows:
1, described absorbent treatment and hollow cylinder adopt no material to be made, and overcome the problem of the low frequency absorption poor performance adopting homogenous material to bring; The side of damping layer and the surface of shell of underwater moving body fit, and effectively avoid the relative sliding of anechoic coating and underwater moving body surface of shell, can also play the effect of vibration damping sound absorption simultaneously; Enhancement Layer makes whole anechoic coating have certain mechanical strength; Absorbent treatment can adopt original material, by inlaying hollow cylinder, resonant frequency is then declined to some extent, but withstand voltage and other performance base of absorbent treatment is originally constant.
2, the endoporus cavity of hollow cylinder and cylindrical take different shapes, and make overlayer not only can improve low frequency absorption performance, effectively can also reduce the noise of underwater moving body self to external radiation, and structure are simple.
3, anechoic coating material of the present invention easily obtains, adopts integrated hot pressing formed or the bonding rear cold briquetting of bonding agent, and moulding process is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention;
Fig. 2 is structure vertical view of the present invention;
Fig. 3 is that Fig. 2 is along A-A cut-open view;
The structural representation that Fig. 4 is the endoporus of hollow cylinder of the present invention when being circular conical surface;
The structural representation that Fig. 5 is the cylindrical of hollow cylinder of the present invention when being circular conical surface;
Description of reference numerals: 1, damping layer; 2, enhancement Layer; 3, absorbent treatment; 4, sealing layer; 5, hollow cylinder.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, invention is described further:
As shown in Figure 1, Figure 2 and Figure 3, the embedded cylindrical cavity anechoic coating of a kind of binary, comprise the damping layer 1, enhancement Layer 2, absorbent treatment 3 and the sealing layer 4 that set gradually, the described side of damping layer 1 and the surface of shell of underwater moving body fit, and described absorbent treatment 3 is inlaid with hollow cylinder 5 in array-like.Described damping layer 1 adopts butyl rubber to make, and damping layer 1 effectively can avoid the relative sliding of anechoic coating and underwater moving body surface of shell, can also play the effect of vibration damping sound absorption simultaneously; Described enhancement Layer 2 adopts glass fabric to make, and enhancement Layer makes whole anechoic coating have certain mechanical strength; Described absorbent treatment 3 and sealing layer 4 adopt butyl rubber or polycarbamate to make, and described hollow cylinder 5 adopts silicon rubber to make, and the elastic modulus of described hollow cylinder 5 material is much smaller than the elastic modulus of absorbent treatment 3.
As shown in Figure 4, Figure 5, as further improvement of this embodiment, the endoporus of described hollow cylinder 5 is straight cylindrical surfaces or circular conical surface; The cylindrical of described hollow cylinder 5 is straight cylindrical surfaces or circular conical surface.The endoporus of hollow cylinder 5 and cylindrical are straight cylindrical surfaces or the face of cylinder,
Preferably, described damping layer 1, enhancement Layer 2, absorbent treatment 3 and sealing layer 4 are integrated hot-forming.Therefore the moulding process of anechoic coating is simple, cost is low.
As another kind of optional embodiment, described damping layer 1, enhancement Layer 2, absorbent treatment 3 and sealing layer 4 successively by bonding agent bonding and one cold briquetting.That is, bonding agent is coated on respect to one another of every adjacent two layers respectively, bonding complete after one cold briquetting, therefore firmly bonding between each layer of anechoic coating.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. the embedded cylindrical cavity anechoic coating of binary, it is characterized in that: comprise the damping layer (1), enhancement Layer (2) and the absorbent treatment (3) that set gradually, the side of described damping layer (1) and the surface of shell of underwater moving body fit, and described absorbent treatment (3) is upper is inlaid with hollow cylinder (5) in array-like.
2. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 1, is characterized in that: described absorbent treatment (3) is provided with sealing layer (4).
3. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 1, is characterized in that: the endoporus of described hollow cylinder (5) is straight cylindrical surfaces or circular conical surface.
4. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 1, is characterized in that: the cylindrical of described hollow cylinder (5) is straight cylindrical surfaces or circular conical surface.
5. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 1 and 2, it is characterized in that: described damping layer (1) adopts butyl rubber to make, described enhancement Layer (2) adopts glass fabric to make, described absorbent treatment (3) and sealing layer (4) adopt butyl rubber or polycarbamate to make, and described hollow cylinder (5) adopts silicon rubber to make.
6. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 5, is characterized in that: described damping layer (1), enhancement Layer (2), absorbent treatment (3) and sealing layer (4) are integrated hot-forming.
7. the embedded cylindrical cavity anechoic coating of a kind of binary according to claim 5, is characterized in that: described damping layer (1), enhancement Layer (2), absorbent treatment (3) and sealing layer (4) successively by bonding agent bonding and one cold briquetting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457352.4A CN104966511A (en) | 2015-07-30 | 2015-07-30 | Binary embedded cylinder cavity sound absorption covering layer |
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| CN201510457352.4A CN104966511A (en) | 2015-07-30 | 2015-07-30 | Binary embedded cylinder cavity sound absorption covering layer |
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| CN104966511A true CN104966511A (en) | 2015-10-07 |
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Cited By (9)
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| CN108492814A (en) * | 2018-03-28 | 2018-09-04 | 贵州大学 | A kind of combination cavity type acoustic stimulation based on impedance transition mechanism type |
| CN110223667A (en) * | 2019-06-14 | 2019-09-10 | 哈尔滨工程大学 | A kind of Composite Hollow acoustic baffle |
| CN110288969A (en) * | 2019-06-20 | 2019-09-27 | 西安交通大学 | A kind of right cylinder type dot matrix enhancing cavity type underwater sound absorption structure |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| CN110853609A (en) * | 2019-11-12 | 2020-02-28 | 哈尔滨工程大学 | Underwater acoustic covering layer based on coupling resonance of multilayer scatterers and cavity |
| CN112185330A (en) * | 2020-09-07 | 2021-01-05 | 南京航空航天大学 | Cross transverse reinforcing arrangement partition plate filled viscoelastic material underwater sound absorption structure |
| CN112562622A (en) * | 2020-12-11 | 2021-03-26 | 哈尔滨工程大学 | Low-frequency sound absorption covering layer containing gradient cylinder cavity |
| CN114104234A (en) * | 2021-11-30 | 2022-03-01 | 浙江大学 | Covering layer diffuse reflection type sound absorption superstructure unit and superstructure |
| CN115910016A (en) * | 2022-12-02 | 2023-04-04 | 浙江大学 | Underwater sound absorption covering layer based on cavity resonance |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492814A (en) * | 2018-03-28 | 2018-09-04 | 贵州大学 | A kind of combination cavity type acoustic stimulation based on impedance transition mechanism type |
| CN110223667A (en) * | 2019-06-14 | 2019-09-10 | 哈尔滨工程大学 | A kind of Composite Hollow acoustic baffle |
| CN110288969B (en) * | 2019-06-20 | 2022-04-22 | 西安交通大学 | Straight column type lattice reinforced cavity type underwater sound absorption structure |
| CN110288969A (en) * | 2019-06-20 | 2019-09-27 | 西安交通大学 | A kind of right cylinder type dot matrix enhancing cavity type underwater sound absorption structure |
| CN110444188A (en) * | 2019-07-30 | 2019-11-12 | 华中科技大学 | A kind of underwater perforation mixing cavity structure acoustic stimulation |
| CN110444188B (en) * | 2019-07-30 | 2021-08-03 | 华中科技大学 | Underwater perforated mixed cavity structure acoustic covering layer |
| CN110853609A (en) * | 2019-11-12 | 2020-02-28 | 哈尔滨工程大学 | Underwater acoustic covering layer based on coupling resonance of multilayer scatterers and cavity |
| CN112185330A (en) * | 2020-09-07 | 2021-01-05 | 南京航空航天大学 | Cross transverse reinforcing arrangement partition plate filled viscoelastic material underwater sound absorption structure |
| CN112185330B (en) * | 2020-09-07 | 2023-07-25 | 南京航空航天大学 | Cross transverse reinforced arrangement partition plate filled viscoelastic material underwater sound absorption structure |
| CN112562622A (en) * | 2020-12-11 | 2021-03-26 | 哈尔滨工程大学 | Low-frequency sound absorption covering layer containing gradient cylinder cavity |
| CN112562622B (en) * | 2020-12-11 | 2022-11-22 | 哈尔滨工程大学 | Low-frequency sound absorption covering layer with gradient cylindrical cavity |
| CN114104234A (en) * | 2021-11-30 | 2022-03-01 | 浙江大学 | Covering layer diffuse reflection type sound absorption superstructure unit and superstructure |
| CN114104234B (en) * | 2021-11-30 | 2023-08-08 | 浙江大学 | Cover layer diffuse reflection type sound absorption super-structure unit and super-structure |
| CN115910016A (en) * | 2022-12-02 | 2023-04-04 | 浙江大学 | Underwater sound absorption covering layer based on cavity resonance |
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Application publication date: 20151007 |
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