A marine composite structure sound shield, sound system

Abstract

The present application relates to the technical field of sound insulation structure, and particularly relates to a marine composite structure sound shield, which comprises: a peripheral frame, the peripheral frame is in a three-dimensional structure, and a back-shaped frame is arranged at the top corner of the peripheral frame; a wallboard is arranged in the peripheral frame, and the wallboard comprises: a perforated protective panel arranged in the peripheral frame, a plurality of porous sound absorption members are arranged on the perforated protective panel, and a plurality of cavities are arranged in the porous sound absorption members; a first local resonance structure is arranged on the porous sound absorption members, a second local resonance structure is arranged on the first local resonance structure; a damping material member is arranged on the second local resonance structure, and a first composite material base plate is arranged on the damping material member; a honeycomb core layer is arranged on the first composite material base plate, and a second composite material base plate is arranged on the honeycomb core layer. The marine composite structure sound shield has the advantages of cavity structure, wide frequency, high sound insulation effect, simple and convenient installation, better isolation effect for wide frequency noise, and improvement of low frequency sound insulation performance.

Description

Technical Field

[0001] This invention relates to the field of sound insulation structure technology, specifically to a marine composite structure sound insulation cover and sound insulation system. Background Technology

[0002] Soundproof enclosures are widely used in large marine equipment, such as gas turbines and diesel generator sets. Traditional soundproof enclosures typically consist of a base steel plate, porous sound-absorbing material, and perforated panels. Traveling sound waves excite vibrations in the air within the porous sound-absorbing material; the viscosity of the air causes some kinetic energy to dissipate as heat, thus achieving sound insulation. According to the mass law, the sound insulation effect of traditional soundproof enclosures depends on the panel thickness, creating a natural contradiction between lightweight design and sound insulation capability. Furthermore, simply optimizing the porous sound-absorbing material alone is insufficient to significantly improve sound insulation performance.

[0003] Currently, sound insulation structures mainly focus on increasing the thickness of material layers and selecting porous sound-absorbing materials, with little consideration given to optimizing the arrangement of material layers. The overall stiffness of such structures is insufficient to meet engineering requirements, and they place higher demands on spatial dimensions. To achieve good sound insulation, space must be sacrificed and weight increased. Summary of the Invention

[0004] Therefore, the present invention provides a marine composite structure soundproof cover and a sound insulation system.

[0005] To address the aforementioned technical problems, this invention provides a marine composite structure soundproof enclosure, comprising: a four-dimensional frame with a U-shaped frame at each of the top corners; a wall panel disposed within the four-dimensional frame, the wall panel comprising: a perforated protective panel disposed within the four-dimensional frame, the perforated protective panel having a porous sound-absorbing element having multiple cavities; a first local resonance structure disposed on the porous sound-absorbing element, the first local resonance structure having a second local resonance structure; a damping material component disposed on the second local resonance structure, the damping material component having a first composite material substrate; and a honeycomb core layer disposed on the first composite material substrate, the honeycomb core layer having a second composite material substrate.

[0006] Furthermore, the volume of the cavity is 1 / 2 to 2 / 3 of the volume of the porous sound-absorbing element.

[0007] Furthermore, the plurality of cavities are arranged at equal intervals, and the cavities are in the form of bosses.

[0008] Furthermore, the first local resonance structure includes a first local resonance base plate, a first local resonance frame, and a first local resonance mass block. The first local resonance base plate is disposed on the porous sound-absorbing component, the first local resonance frame is disposed on the first local resonance base plate, and the first local resonance mass block is disposed within the first local resonance frame.

[0009] Furthermore, the second local resonance structure includes a second local resonance base plate and a second local resonance frame, a second local resonance mass block, and a second local resonance top plate. The second local resonance base plate is disposed on the first local resonance frame, the second local resonance frame is disposed on the second local resonance base plate, the second local resonance mass block is disposed within the second local resonance frame, and the second local resonance top plate is disposed on the second local resonance frame.

[0010] Furthermore, the first local resonant frame and the second local resonant frame include a plurality of transverse links and a plurality of longitudinal links, the transverse links and the longitudinal links being staggered and having a receiving area, in which the first local resonant mass block and the second local resonant mass block are located.

[0011] Furthermore, the thickness of the perforated protective panel is 1-2 mm.

[0012] Furthermore, the porosity of the porous sound-absorbing component is 23%-25%.

[0013] Furthermore, the U-shaped frame is provided with porous sound-absorbing material components.

[0014] The present invention also provides a marine composite structure sound insulation system, including the aforementioned marine composite structure sound insulation cover.

[0015] The technical solution of this invention has the following advantages:

[0016] 1. The marine composite structure soundproof enclosure provided by the present invention includes: a four-dimensional frame, wherein the four-dimensional frame has a three-dimensional structure and a U-shaped frame is provided at the top corner of the four-dimensional frame; a wall panel disposed within the four-dimensional frame, the wall panel including: a perforated protective panel disposed within the four-dimensional frame, wherein a porous sound-absorbing element is provided on the perforated protective panel, and the porous sound-absorbing element has multiple cavities; a first local resonance structure disposed on the porous sound-absorbing element, wherein a second local resonance structure is provided on the first local resonance structure; a damping material element disposed on the second local resonance structure, wherein a first composite material substrate is provided on the damping material element; and a honeycomb core layer disposed on the first composite material substrate, wherein a second composite material substrate is provided on the honeycomb core layer.

[0017] The four-sided frame has a three-dimensional structure, with U-shaped frames set at the top corners. Perforated protective panels are installed within the four-sided frame, and porous sound-absorbing components with multiple cavities are installed on these panels. Simultaneously, a first local resonant structure and a second local resonant structure are set on the porous sound-absorbing components, providing overall support. Damping material, a first composite material substrate, a honeycomb core layer, and a second composite material substrate are installed on the second local resonant structure, thus forming a marine composite structural soundproof enclosure.

[0018] The marine composite soundproof enclosure features an internal cavity structure, offering advantages such as wide bandwidth, high sound insulation, and simple and convenient installation. It provides better isolation for broadband noise and helps improve low-frequency sound insulation performance. Furthermore, the multi-layer composite structure increases the number of times sound waves pass through impedance mismatch surfaces during transmission, resulting in greater sound energy dissipation and improved overall performance of the enclosure. In addition, the wall panels of the marine composite soundproof enclosure are designed as a single unit, making installation and disassembly simple and convenient.

[0019] The use of damped material components and a dual local resonance structure is beneficial for reducing the vibration of the soundproof enclosure structure while achieving good sound insulation effect. The marine composite structure soundproof enclosure uses a composite material substrate, which not only improves the structural strength but also reduces the weight of the soundproof enclosure. At the same time, it utilizes the high damping performance of composite materials and the energy loss property caused by interlayer shear to achieve good vibration reduction and noise reduction effect.

[0020] 2. The marine composite structure soundproof cover provided by the present invention has a cavity volume that is 1 / 2 to 2 / 3 of the volume of the porous sound-absorbing component; the multiple cavities are equally spaced, and the cavities are in the form of bosses. This arrangement ensures sufficient sound-absorbing cavity range, and the cavity end face can be of various shapes, such as circular or rhomboid.

[0021] 3. The marine composite structure soundproof cover provided by the present invention includes a first local resonance structure comprising a first local resonance base plate, a first local resonance frame, and a first local resonance mass block. The first local resonance base plate is disposed on the porous sound-absorbing component, the first local resonance frame is disposed on the first local resonance base plate, and the first local resonance mass block is disposed within the first local resonance frame.

[0022] The overall strength and stiffness of the first local resonance structure are increased by setting up the first local resonance base plate, the first local resonance frame, and the first local resonance mass block.

[0023] The summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed description below. The summary section is not intended to identify essential or necessary features of this disclosure, nor is it intended to limit the scope of this disclosure. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the marine composite structure soundproof cover provided by the present invention;

[0026] Figure 2 A schematic diagram of the wall panel of the marine composite structure soundproof enclosure provided by the present invention;

[0027] Figure 3 A cross-sectional view of the wall panel of the marine composite structure soundproof enclosure provided by the present invention;

[0028] Figure 4 A schematic diagram of the double-layer localized resonance structure of the marine composite soundproof enclosure provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the first composite material substrate for the marine composite structure soundproof cover provided by the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Four-sided frame; 2. U-shaped frame; 3. Wall panel; 4. Perforated protective panel; 5. Porous sound-absorbing component; 6. Cavity; 7. First local resonance structure; 8. Second local resonance structure; 9. Damping material component; 10. First composite material substrate; 11. Honeycomb core layer; 12. Second composite material substrate; 13. First local resonance base plate; 14. First local resonance frame; 15. First local resonance mass block; 16. Second local resonance base plate; 17. Second local resonance frame; 18. Second local resonance mass block; 19. Second local resonance top plate; 20. Transverse connecting rod; 21. Longitudinal connecting rod; 22. Porous sound-absorbing material component; 23. Bolt. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0033] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0035] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this disclosure, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0037] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0038] Please see Figures 1 to 5 As shown, the present invention provides a marine composite structure soundproof enclosure, comprising: a four-dimensional frame 1, wherein the four-dimensional frame 1 has a three-dimensional structure and a U-shaped frame 2 is provided at the top corner of the four-dimensional frame 1; a wall panel 3 disposed within the four-dimensional frame 1, wherein the wall panel 3 includes: a perforated protective panel 4 disposed within the four-dimensional frame 1, wherein the perforated protective panel 4 has a porous sound-absorbing component 5, wherein the porous sound-absorbing component 5 has a plurality of cavities 6; a first local resonance structure 7 disposed on the porous sound-absorbing component 5, wherein the first local resonance structure 7 has a second local resonance structure 8; a damping material component 9 disposed on the second local resonance structure 8, wherein the damping material component 9 has a first composite material substrate 10; and a honeycomb core layer 11 disposed on the first composite material substrate 10, wherein the honeycomb core layer 11 has a second composite material substrate 12.

[0039] The four-sided frame 1 has a three-dimensional structure, with U-shaped frames 2 set at the top corners of the four-sided frame 1. A perforated protective panel 4 is installed inside the four-sided frame 1, and a porous sound-absorbing component 5 is installed on the perforated protective panel 4. The porous sound-absorbing component 5 has multiple cavities 6, which can reduce the weight of the porous sound-absorbing component 5. Simultaneously, a first local resonance structure 7 and a second local resonance structure 8 are set on the porous sound-absorbing component 5, which can be used to support the entire structure. A damping material component 9, a first composite material substrate 10, a honeycomb core layer 11, and a second composite material substrate 12 are set on the local resonance structure, thereby forming a marine composite structural soundproof enclosure.

[0040] The internal cavity of this marine composite soundproof enclosure features a cavity 6 structure, offering advantages such as wide bandwidth, high sound insulation, and simple and convenient installation. It provides better isolation for wideband noise and helps improve low-frequency sound insulation performance. Furthermore, the multi-layer composite structure increases the number of times sound waves pass through the impedance mismatch surface during transmission, resulting in greater sound energy dissipation and improved overall performance of the soundproof enclosure. In addition, the wall panels 3 of this marine composite soundproof enclosure adopt an integrated design, making installation and disassembly simple and convenient.

[0041] The use of damped material component 9 and dual local resonance structure is beneficial to achieving good sound insulation effect while reducing the vibration of the soundproof enclosure structure; the marine composite structure soundproof enclosure uses composite material substrate, which improves the structural strength and reduces the weight of the soundproof enclosure. At the same time, it utilizes the high damping performance of composite materials and the energy loss property caused by interlayer shear to achieve good vibration reduction and noise reduction effect.

[0042] When installing the composite structure soundproof enclosure for the ship, the wall panel 3 is directly installed in the space of the corresponding four-sided frame 1, and the wall panel 3 is fixed to the four-sided frame 1 by bolts 23.

[0043] In some optional embodiments, the volume of the cavity 6 is 1 / 2 to 2 / 3 of the volume of the porous sound-absorbing element 5; the plurality of cavities 6 are equally spaced, and the cavity 6 is in the form of a boss. This arrangement ensures that there is a sufficient range of sound-absorbing cavities 6, and the end face of the cavity 6 can be of various shapes, such as circular or rhomboid.

[0044] In some optional embodiments, the first local resonance structure 7 includes a first local resonance base plate 13, a first local resonance frame 14, and a first local resonance mass block 15. The first local resonance base plate 13 is disposed on the porous sound-absorbing component 5, the first local resonance frame 14 is disposed on the first local resonance base plate 13, and the first local resonance mass block 15 is disposed within the first local resonance frame 14.

[0045] The overall strength and stiffness of the first local resonance structure 7 are increased by setting the first local resonance base plate 13, the first local resonance frame 14, and the first local resonance mass block 15.

[0046] In some optional embodiments, the second local resonance structure 8 includes a second local resonance base plate 16 and a second local resonance frame 17, a second local resonance mass block 18, and a second local resonance top plate 19. The second local resonance base plate 16 is disposed on the first local resonance frame 14, the second local resonance frame 17 is disposed on the second local resonance base plate 16, the second local resonance mass block 18 is disposed within the second local resonance frame 17, and the second local resonance top plate 19 is disposed on the second local resonance frame 17.

[0047] The second local resonance structure 8 is strengthened by the second local resonance base plate 16, the second local resonance frame 17, the second local resonance mass block 18, and the second local resonance top plate 19.

[0048] The second local resonance base plate 16 is the first local resonance top plate, meaning that the second local resonance base plate 16 and the first local resonance top plate share the same plate.

[0049] The damping material component 9 can be made of materials such as rubber or polyurethane, and is used to suppress the vibration of the composite substrate and the two local resonant structures.

[0050] In this embodiment, the thickness of the damping material component 9 is 10-20 mm.

[0051] The thickness of the first local resonance base plate 13, the second local resonance base plate 16, and the second local resonance top plate 19 is the same, which is 2-5mm. The contact area between the mass block and the first local resonance base plate 13, the second local resonance base plate 16, and the second local resonance top plate 19 should not be too small, and the cross-sectional shape of the mass block is diverse, such as circular, square, or rhomboid.

[0052] In some optional embodiments, the first local resonant frame 14 and the second local resonant frame 17 include a plurality of transverse links 20 and a plurality of longitudinal links 21, the transverse links 20 and the longitudinal links being staggered and having a receiving area, in which the first local resonant mass block 15 and the second local resonant mass block 18 are located.

[0053] By arranging multiple transverse links 20 and multiple longitudinal links 21, and by staggering the transverse links 20 and the longitudinal links, the receiving area formed by the transverse links 20 and the longitudinal links facilitates the placement of the first local resonant mass block 15 and the second local resonant mass block 18 within the receiving area.

[0054] In some optional embodiments, the thickness of the perforated protective panel 4 is 1-2 mm. Furthermore, the porosity of the porous sound-absorbing element 5 is 23%-25%.

[0055] In some alternative embodiments, the U-shaped frame 2 is provided with a porous sound-absorbing material component 22.

[0056] The U-shaped frame 2 is welded from square steel pipes, and several bolt holes 23 are opened on the surface for fixing the second composite material substrate 12. The U-shaped frame 2 is filled with porous sound-absorbing material 22. The sound insulation performance of the composite structure soundproof cover is improved by utilizing the viscosity and heat conduction effect of the porous material to transmit sound waves.

[0057] The sound-absorbing material component 22 is made of the same material as the porous sound-absorbing component 5, such as glass wool, ceramic wool, or rock wool. The thickness of the porous sound-absorbing material component 22 is 20-40mm. The material parameters of the porous sound-absorbing material component 22 are shown in Table 1 below.

[0058] Table 1 Parameters of Porous Sound Absorbing Materials

[0059] Fiberglass wool 200 17373 0.95 Ceramic cotton 170 5000 0.99 rock wool 50 6000 0.95

[0060] The present invention also provides a marine composite structure sound insulation system, including the aforementioned marine composite structure sound insulation cover.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A marine composite structure soundproof enclosure, characterized in that, include: The four-sided frame (1) has a three-dimensional structure, and a U-shaped frame (2) is provided at the top corner of the four-sided frame (1). A wall panel (3) is disposed within the surrounding frame (1), the wall panel (3) comprising: A perforated protective panel (4) is provided inside the surrounding frame (1). The perforated protective panel (4) is provided with a porous sound-absorbing component (5), and the porous sound-absorbing component (5) is provided with multiple cavities (6). A first local resonance structure (7) is disposed on the porous sound-absorbing component (5), and a second local resonance structure (8) is disposed on the first local resonance structure (7). A damping material component (9) is disposed on the second local resonance structure (8), and a first composite material substrate (10) is disposed on the damping material component (9). A honeycomb core layer (11) is disposed on the first composite material substrate (10), and a second composite material substrate (12) is disposed on the honeycomb core layer (11). The first local resonance structure (7) includes a first local resonance base plate (13), a first local resonance frame (14), and a first local resonance mass block (15). The first local resonance base plate (13) is disposed on the porous sound-absorbing component (5), the first local resonance frame (14) is disposed on the first local resonance base plate (13), and the first local resonance mass block (15) is disposed inside the first local resonance frame (14). The second local resonance structure (8) includes a second local resonance base plate (16), a second local resonance frame (17), a second local resonance mass block (18), and a second local resonance top plate (19). The second local resonance base plate (16) is disposed on the first local resonance frame (14), the second local resonance frame (17) is disposed on the second local resonance base plate (16), the second local resonance mass block (18) is disposed inside the second local resonance frame (17), and the second local resonance top plate (19) is disposed on the second local resonance frame (17).

2. The marine composite structure soundproof enclosure according to claim 1, characterized in that, The volume of the cavity (6) is 1 / 2 to 2 / 3 of the volume of the porous sound-absorbing component (5).

3. The marine composite structure soundproof enclosure according to claim 2, characterized in that, The plurality of cavities (6) are arranged at equal intervals, and the cavity (6) is in the form of a boss.

4. The marine composite structure soundproof enclosure according to claim 3, characterized in that, The first local resonance frame (14) and the second local resonance frame (17) include a plurality of transverse links (20) and a plurality of longitudinal links (21), the transverse links (20) and the longitudinal links are staggered and have an accommodating area, the first local resonance mass block (15) and the second local resonance mass block (18) are located in the accommodating area.

5. The marine composite structure soundproof enclosure according to claim 4, characterized in that, The thickness of the perforated protective panel (4) is 1-2 mm.

6. The marine composite structure soundproof enclosure according to claim 5, characterized in that, The porosity of the porous sound-absorbing component (5) is 23%-25%.

7. The marine composite structure soundproof enclosure according to claim 6, characterized in that, The U-shaped frame (2) is provided with a porous sound-absorbing material component (22).

8. A marine composite structure sound insulation system, characterized in that, The marine composite structure soundproof enclosure includes any one of claims 1-7.

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