CN115240624A - Multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics - Google Patents
Multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics Download PDFInfo
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- G—PHYSICS
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- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
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- G10K11/162—Selection of materials
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to the field of low-frequency sound insulation superstructures, and particularly relates to a multifunctional superstructures with mechanical bearing and underwater sound insulation characteristics, which comprises two oppositely arranged cover plates and a sound insulation layer arranged between the two cover plates, wherein the sound insulation layer is composed of a plurality of sound insulation components, the sound insulation components are of a cylindrical structure with a hexagonal section, the sound insulation components are arranged in a honeycomb manner, the included angle between the connecting line of the central axis of each sound insulation component and the side center farthest away from the side center and the cover plate is 20-30 degrees, the adjacent sound insulation components are arranged in a common side manner, and a plurality of through holes are formed in the sides of the sound insulation components along the axis of the sound insulation components.
Description
Technical Field
The invention belongs to the field of low-frequency sound insulation superstructures, and particularly relates to a multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics.
Background
The underwater sound insulation material is used for shielding unnecessary noise radiation of underwater equipment, and the underwater sound insulation material has important significance in the aspects of reducing underwater sound communication interference, avoiding sonar detection and the like. The underwater sound insulation functional material is widely applied to the field of noise control of underwater equipment.
Compared with the limited bandwidth generated by Bragg scattering and local resonance in the acoustic metamaterial, the impedance mismatch mechanism is an effective method for realizing low-frequency broadband sound insulation. Generally, under the condition of normal incidence of sound waves, the acoustic impedance of an isotropic solid is the product of mass density and longitudinal wave velocity, the thickness limit of the underwater sound insulation material is considered, and therefore, in order to achieve impedance mismatch with water, a medium with low density or low sound velocity is required to generate strong reflection with the water. However, the impedance of a common homogeneous isotropic solid (such as rubber) and water is comparable. It is difficult to find a low impedance material as an acoustically soft boundary for an aqueous medium. Air bubbles can be considered as a better choice for underwater sound insulation, however, they are unstable in the marine environment with water pressure, which also limits their practical application.
The traditional underwater sound insulation material generally has the following two problems, namely low-frequency sound insulation difference and poor mechanical bearing capacity. In fact, the underwater sound insulation material is under the action of hydrostatic pressure in the actual working environment, the low-frequency sound insulation performance can be greatly changed, the hydrostatic pressure is generally higher, the low-frequency sound insulation performance of the material is lower, the bearing requirement causes the low-frequency sound insulation performance of the underwater sound material to be difficult to break through, and the underwater sound insulation material becomes one of the technical problems in the field. Therefore, it is necessary and urgent to develop an underwater metamaterial having both mechanical load bearing and low-frequency sound insulation properties.
Disclosure of Invention
The invention aims to provide a multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics.
The sound insulation component comprises two oppositely arranged cover plates and a sound insulation layer arranged between the two cover plates, the sound insulation layer is composed of a plurality of sound insulation components, the sound insulation components are of a cylindrical structure with a hexagonal section, the sound insulation components are arranged in a honeycomb mode, an included angle between a connecting line of a central axis of each sound insulation component and a side center farthest away from the central axis of each sound insulation component and the cover plate is 20-30 degrees, adjacent sound insulation components are arranged in a common side mode, and a plurality of through holes are formed in the sides of the sound insulation components along the axis of the sound insulation components.
Further, the through hole is a rectangular hole.
Furthermore, the through holes are arranged so that the thickness of each part of the sound insulation component is 0.4-0.6 mm.
Further, a plurality of the through holes are arranged at equal intervals.
Furthermore, the connecting edges between every two rows of sound insulation assemblies are short-edge thin-edge connecting edges and rectangular thin-edge connecting edges in sequence.
Furthermore, the sound insulation components arranged in a honeycomb shape are composed of sound insulation units, each sound insulation unit comprises a whole edge, a half short edge thin edge arranged on one side of the whole edge and a half rectangular thin edge arranged on the other side of the whole edge, and every four sound insulation units are symmetrically spliced in pairs to form the sound insulation components and rectangular thin edge connecting edges.
Furthermore, the side walls of the sound insulation units are eight molded surfaces, one side wall of the semi-rectangular thin side is a first molded surface, one side surface of the whole side close to the first molded surface is a second molded surface, one side surface of the semi-short side thin side close to the second molded surface is a third molded surface, the end surface of the semi-short side thin side is a fourth molded surface, the other side surface of the semi-short side thin side is a fifth molded surface, the other side surface of the whole side is a sixth molded surface, the other side of the semi-rectangular thin side is a seventh molded surface, and the end surface of the semi-rectangular thin side is an eighth molded surface, so that the four sound insulation units forming a group of sound insulation assemblies sequentially comprise a first sound insulation unit, a second sound insulation unit, a third sound insulation unit and a fourth sound insulation unit;
in the first sound insulation unitThe distance between the eighth molded surface and the eighth molded surface in the second sound insulation unit is a 1 The distance between the fourth profile and the eighth profile of the first sound insulation unit is a 2 The distance between the eighth molded surface and the intersection line of the second molded surface and the first molded surface is a 3 Wherein a is 2 ＝1/2a 1 ，a 3 ＝3/10a 2 。
Furthermore, the distance between the third profile of the first sound-insulating unit and the third profile of the fourth sound-insulating unit is b 1 The distance between the third profile and the seventh profile in the first sound insulation unit is b 2 The distance between the first profile and the seventh profile is b 3 The distance between the second profile and the sixth profile is b 4 The distance between the third profile surface and the fifth profile surface is b 5 Wherein b is 2 ＝1/2b 1 ，b 3 ＝1/8b 2 ，b 4 ＝1/4b 2 ，b 5 ＝1/25b 2 。
Further, the angle α =110 ° between the first profile and the second profile.
Furthermore, the physical parameters of the cover plate and the sound insulation layer are as follows: the elastic modulus E range is more than or equal to 0.1GPa and less than or equal to E and less than or equal to 210GPa, the Poisson ratio eta range is more than or equal to 0.2 and less than or equal to 0.49, and the density rho range is more than or equal to 1000kg/m 3 ≤ρ≤12000kg/m 3 。
The invention has the beneficial effects that the through holes are formed on the edges of the sound insulation component, compared with the condition that no through hole is formed, the whole thickness of the sound insulation component can be increased due to the through holes, the equivalent bending rigidity of the sound insulation component is increased, and the strength of the sound insulation component can be further improved. Meanwhile, the through holes are increased, the density of the sound insulation components is not increased, the underwater sound insulation amount cannot be reduced, namely, the same sound insulation effect is guaranteed on the premise of increasing the structure bearing capacity, in addition, all the sound insulation components are inclined to the two cover plates and inclined for 20-30 degrees, the sound insulation components can obtain the minimum acoustic impedance, namely, the same materials are realized, the structure bearing capacity is increased through structural change under the conditions of equal filling rate and equal thickness, the sound insulation capacity of the structure is improved, and the low-frequency broadband sound insulation effect is better. The invention starts from a quasi-static impedance mismatch mechanism, can effectively deal with the sound insulation problem of a low frequency band of 300-1000Hz, has higher rigidity and yield strength, can effectively deal with the underwater noise control in a certain pressure environment, and has good engineering application prospect.
Drawings
FIG. 1 is a partial structural cross-section of a prior art honeycomb structure;
FIG. 2 is a cross-sectional view of a portion of the present invention;
FIG. 3 is a schematic structural diagram of the present invention;
FIG. 4 is a schematic structural diagram of a sound insulation unit according to the present invention;
FIG. 5 is a schematic structural diagram of four spliced sound insulation units in the invention;
fig. 6 is a graph comparing stress-strain curves for a simulation example of an embodiment of the present invention and a prior art honeycomb structure.
FIG. 7 is a graph comparing the sound insulation over the frequency range of 300-1000Hz at normal pressure for a simulation of an embodiment of the present invention and a prior art honeycomb.
In the figure, 1-cover plate; 2-a sound insulation layer; 21-a sound-insulating component; 211-a sound insulation unit; 2111-trimming; 2112-half short edge feathering; 2113-semi-rectangular feathered edges; 2114-through hole; 211.1-a first sound insulation unit; 211.2-a second sound insulation unit; 211.3-a third sound insulation unit; 211.4-a fourth sound insulation unit; 201-a first profile; 202-a second profile; 203-a third profile; 204-a fourth profile; 205-a fifth profile; 206-a sixth profile; 207-a seventh profile; 208-eighth profile.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "connected", "fixed", and the like are to be understood broadly, for example, "fixed" may be fixedly connected, may be detachably connected, or may be integrated; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
As shown in the accompanying drawings 1-7, the sound insulation structure comprises two cover plates 1 which are oppositely arranged and a sound insulation layer 2 arranged between the two cover plates 1, wherein the sound insulation layer 2 is composed of sound insulation components 21, the sound insulation components 21 are of a cylindrical structure with a hexagonal section, a plurality of sound insulation components 21 are arranged in a honeycomb shape, an included angle between a connecting line between the central axis of each sound insulation component 21 and the center of the farthest side and the cover plate 1 is 20-30 degrees, adjacent sound insulation components 21 are arranged on the same side, and a plurality of through holes 2114 are formed in the sides of the sound insulation components 21 along the axis of the sound insulation components.
According to the invention, the through holes 2114 are formed on the sides of the sound insulation component 21, compared with the situation that the through holes 2114 are not formed, the whole thickness of the sound insulation component 21 is increased due to the arrangement of the through holes 2114, the equivalent bending rigidity of the sound insulation component 21 is increased, and the strength of the sound insulation component 21 can be further improved. Meanwhile, the through holes 2114 are added, the density of the sound insulation component 21 is not increased, the underwater sound insulation quantity is not reduced, namely, on the premise of increasing the bearing capacity of the structure, the same sound insulation effect is guaranteed, in addition, all the sound insulation components 21 are arranged by inclining to the two cover plates 1 and inclining by 20-30 degrees, the sound insulation component 21 can obtain the minimum acoustic impedance, namely, the structural bearing capacity is increased through structural change under the conditions of the same material, the same filling rate and the same thickness, the sound insulation capacity of the structure is improved, and the low-frequency broadband sound insulation effect is better. The invention starts from a quasi-static impedance mismatch mechanism, can effectively deal with the sound insulation problem of a low frequency band of 300-1000Hz, has higher rigidity and yield strength, can effectively deal with the underwater noise control under a certain pressure environment, can be applied to sound insulation and noise reduction of underwater equipment or other fields, and has good engineering application prospect.
The perforating hole 2114 is a rectangular hole and is set as a rectangular hole, so that the thicknesses of all parts on the edge of the sound insulation component 21 are relatively consistent, namely the characteristic of a sheet metal part is approximately achieved, the thicknesses of all parts of the sound insulation component 21 are approximately consistent, the whole using amount is less on the premise of ensuring to obtain better structure bearing capacity, materials are saved, the weight is reduced, and meanwhile, the consistency of all parts of the bearing capacity of the sound insulation layer 2 can be ensured. Preferably, the through-holes 2114 are provided so that the thickness of the sound-proof member 21 is 0.4 to 0.6mm everywhere, that is, the thickness of the sound-proof member 21 is approximately 0.4 to 0.6mm everywhere.
The through holes 2114 are arranged at equal intervals, so that the thicknesses of all parts of the sound insulation component 21 are approximately consistent, the bearing capacity of all parts of the sound insulation component 21 is consistent, and the integral bearing capacity is ensured.
As shown in fig. 2 and 3, the connecting edges between every two rows of sound insulation components 21 are short-edge thin-edge connecting edges and rectangular-edge thin-edge connecting edges in sequence, and the through holes 2114 are formed in the rectangular thin-edge connecting edges, so that the thickness of each part of the rectangular thin-edge connecting edges is consistent with that of the short-edge thin-edge connecting edges.
Specifically, the sound insulation component 21 arranged in a honeycomb shape is composed of sound insulation units 211, as shown in fig. 4, each sound insulation unit 211 comprises a whole edge 2111, a half-short-edge thin edge 2112 arranged on one side of the whole edge 2111 and a half-rectangular thin edge 2113 arranged on the other side of the whole edge 2111, the half-short-edge thin edge 2112, the whole edge 2111 and the half-rectangular thin edge 2113 are in a Z-shaped structure, every four sound insulation units 211 are symmetrically spliced in pairs to form the sound insulation component 21 and a rectangular thin-edge connecting edge, as shown in fig. 5, the two sound insulation units 211 are spliced to form a half-short-edge thin-edge connecting edge and a half-rectangular thin-edge connecting edge, a plurality of sound insulation units 211 are sequentially spliced to form a short-edge thin-edge connecting edge and a rectangular thin-edge connecting edge, and the short-edge thin-edge connecting edge and the rectangular thin-edge connecting edge are two sides of a hexagon of the sound insulation component 21.
As shown in fig. 4, the side walls of the sound insulation unit 211 have eight profiles, one side wall of the semi-rectangular thin edge 2113 is a first profile 201, one side of the whole edge 2111 close to the first profile 201 is a second profile 202, one side of the semi-short thin edge 2112 close to the second profile 202 is a third profile 203, the end face of the semi-short thin edge 2112 is a fourth profile 204, the other side of the semi-short thin edge 2112 is a fifth profile 205, the other side of the whole edge 2111 is a sixth profile 206, the other side of the semi-rectangular thin edge 2113 is a seventh profile 207, and the end face of the semi-rectangular thin edge 2113 is an eighth profile 208, wherein the first profile 201 is connected with the two ends of the second profile 202 and the eighth profile 208; the second profile 202 is connected with both ends of the first profile 201 and the third profile 203; the third profile 203 is connected with both ends of the second profile 202 and the fourth profile 204; the fourth profile 204 is connected with both ends of the third profile 203 and the fifth profile 205; the fifth profile 205 is connected to both ends of the fourth profile 204 and the sixth profile 206; said sixth profile 206 is connected to both ends of said fifth profile 205 and seventh profile 207; the seventh profile 207 is connected with both ends of the sixth profile 206 and the eighth profile 208; the eighth profile 208 is connected to the seventh profile 207 and the two ends of the first profile 201, and the first profile 201 is perpendicular to the eighth profile 208, the seventh profile 207 is perpendicular to the eighth profile 208, the third profile 203 is perpendicular to the fourth profile 204, and the fifth profile 205 is perpendicular to the fourth profile 204.
In addition, the four sound insulation units 211 forming one group of sound insulation assemblies 21 are a first sound insulation unit 211.1, a second sound insulation unit 211.2, a third sound insulation unit 211.3 and a fourth sound insulation unit 211.4 in sequence; the four sound insulation units 211 form a group of sound insulation assemblies 21 and simultaneously comprise half short-side thin-edge connecting edges and half rectangular thin-edge connecting edges of another group of adjacent sound insulation assemblies 21.
In one embodiment, the distance between eighth profile 208 of first sound-proof unit 211.1 and eighth profile 208 of second sound-proof unit 211.2 is a 1 The distance between fourth profile 204 and eighth profile 208 of first sound-proof unit 211.1 is a 2 The distance between the eighth profile surface 208 and the intersection line of the second profile surface 202 and the first profile surface 201 is a 3 Wherein a is 2 ＝1/2a 1 ，a 3 ＝3/10a 2 。
The distance between third profile 203 of first sound-proof unit 211.1 and third profile 203 of fourth sound-proof unit 211.4 is b 1 The distance between third profile 203 and seventh profile 207 in first sound-proof unit 211.1 is b 2 The distance between the first profile 201 and the seventh profile 207 is b 3 The distance between the second profile 202 and the sixth profile 206 is b 4 The distance between the third profile 203 and the fifth profile 205 is b 5 Wherein b is 2 ＝1/2b 1 ，b 3 ＝1/8b 2 ，b 4 ＝1/4b 2 ，b 5 ＝1/25b 2 . In the present embodiment, the cross-sectional hexagon of sound insulation member 21 is not a regular hexagon, but is an axisymmetric and centrally symmetric hexagon structure having an approximately elliptical shape as shown in fig. 2, which is better in load-bearing capacity and sound insulation capacity. In this embodiment, an included angle α =110 ° between the first molding surface 201 and the second molding surface 202, that is, an included angle θ (an included angle between a y-axis component in a main shaft direction of the sound insulation component 21 and a long side wall of the cover plate 1) between a connection line between a central axis of the sound insulation component 21 and a center of a side farthest from the cover plate 1 is 30 °.
The cover plate 1 and the sound insulation layer 2 are made of the following materials in physical parameters: the elastic modulus E range is more than or equal to 0.1GPa and less than or equal to E and less than or equal to 210GPa, the Poisson ratio eta range is more than or equal to 0.2 and less than or equal to 0.49, and the density rho range is more than or equal to 1000kg/m 3 ≤ρ≤12000kg/m 3 And the requirements of the bearing capacity and the sound insulation effect of the superstructure are met, and the cover plate 1 and the sound insulation layer 2 can be made of metal materials or nonmetal materials.
The cover plate 1 and the sound insulation layer 2 are integrally printed and manufactured and molded by adopting a 3D printing technology or manufactured and molded by adopting machining modes such as wire cut electrical discharge machining and the like, so that the structure and the size of each position of the sound insulation layer 2 can meet the requirements.
The invention also provides a specific embodiment:
the cover plate 1 and the sound insulation layer 2 are made of resin, and the material parameters are as follows: elastic modulus E =2.6GPa, poisson ratio eta =0.42 and density rho =1250kg/m 3 Yield strength σ s =53MPa. The superstructure overall thickness a =58mm, and the cover plate 1 thickness c =2mm. Distance a between eighth profile 208 in first sound-proof unit 211.1 and eighth profile 208 in second sound-proof unit 211.2 in sound-proof assembly 21 1 =20mm, distance b between third profile 203 in first sound-proof unit 211.1 and third profile 203 in fourth sound-proof unit 211.4 1 ＝20mm；
Distance a between fourth profile 204 and eighth profile 208 in first sound-proof unit 211.1 2 ＝1/2a 1 =1/2 × 20=10mm, and the distance a between the eighth mold surface 208 and the intersection of the second mold surface 202 and the first mold surface 201 3 ＝3/10a 2 ＝3/10×10＝3mm；
Distance b between third profile 203 and seventh profile 207 of first sound-insulating unit 211.1 2 ＝1/2b 1 =1/2 × 20=10mm, the distance b between the first profile 201 and the seventh profile 207 3 ＝1/8b 2 =1/8 × 10=1.25mm, the distance b between the second profile 202 and the sixth profile 206 4 ＝1/4b 2 =1/4 × 10=2.5mm, the distance between the third profile 203 and the fifth profile 205 is b 5 ＝1/25b 2 ＝1/25×10＝0.4mm；
An included angle alpha =110 degrees between the first molded surface 201 and the second molded surface 202 in the first sound insulation unit 211.1, and an included angle theta =30 degrees between a main shaft direction y-axis component of the sound insulation component 21 and a long side wall of the cover plate 1;
through holes 2114 with the same size are uniformly distributed in the sound insulation assembly 21 except for the connecting side of the short-side thin side, the through holes 2114 are rectangular holes, the number of the through holes is q =25, the length a '=1.31mm of the rectangle, the width b' =1.31mm of the rectangle, and the distance between adjacent rectangular holes is delta =0.6mm.
On the basis of satisfying the above conditions, a comparison graph of stress-strain curves of the inventive embodiment and the conventional anisotropic honeycomb structure in fig. 6 and a comparison graph of sound insulation under normal pressure in the frequency range of 300-1000Hz of the inventive embodiment and the conventional anisotropic honeycomb structure in fig. 7 were obtained through simulation calculation in finite element commercial software ABAQUS and comsolmutiphatics.
Fig. 6 is a graph showing stress-strain curves corresponding to uniaxial compressive responses of the embodiment of the present invention and a conventional anisotropic honeycomb structure under the same material, equal filling rate and equal thickness conditions, where the abscissa is nominal strain and the ordinate is normalized stress (the ratio of applied stress to yield strength of the material), and it can be seen by comparison that the embodiment of the present invention not only has higher initial stiffness, but also has higher strength than that of a common anisotropic honeycomb superstructure (the embodiment is 2.14 MPa), and the strength value of the embodiment of the present invention is twice as high as that of a common anisotropic honeycomb superstructure (1.08 MPa), which indicates that the embodiment of the present invention has stronger pressure-bearing performance compared with the conventional anisotropic honeycomb structure.
Fig. 7 is a graph comparing the sound insulation capacity of the embodiment of the present invention and the conventional anisotropic honeycomb structure under the same material, equal filling rate and equal thickness conditions, and it can be seen by comparison that the embodiment of the present invention has far better low-frequency sound insulation performance than the conventional anisotropic honeycomb structure, and under the condition that the overall thickness is only 58mm, the average sound insulation capacity of the embodiment is about 15.6dB in the frequency range of 300-1000Hz, and can block about 97.25% of incident sound energy, and has better low-frequency broadband sound insulation effect.
Therefore, the superstructure provided by the invention has better mechanical bearing performance. Compared with the traditional anisotropic honeycomb structure, the superstructure with mechanical bearing and underwater sound insulation characteristics provided by the invention has higher rigidity and strength, can keep the structure complete under a certain pressure condition, and resists structural damage and failure. Meanwhile, the sound insulation material has better low-frequency sound insulation performance. Compared with the traditional anisotropic honeycomb structure, the average sound insulation quantity is about 15.6dB in the frequency range of 300-1000Hz, and the whole thickness is only 58mm, so that high-efficiency sound insulation is realized.
Those not described in detail in this specification are well within the skill of the art.
Claims (10)
1. The utility model provides a have mechanics concurrently and bear and multi-functional superstructure of sound insulation characteristic of underwater sound, characterized by, include apron (1) of two relative settings and sound insulation layer (2) of setting between two apron (1), sound insulation layer (2) comprise a plurality of sound insulation subassemblies (21), sound insulation subassembly (21) are hexagonal tubular structure for the cross-section, and a plurality of sound insulation subassemblies (21) are honeycomb arrangement, the central axis of sound insulation subassembly (21) with the line of distance farthest side length center with the contained angle of apron (1) is 20-30, and adjacent sound insulation subassembly (21) are provided with a plurality of perforating holes (2114) along sound insulation subassembly axis on setting up and sound insulation subassembly (21) the limit altogether.
2. A multifunctional superstructure with both mechanical load bearing and underwater acoustic insulation properties according to claim 1, characterized in that said through-going hole (2114) is a rectangular hole.
3. A multi-functional superstructure with both mechanical load-bearing and underwater acoustic insulation properties according to claim 2, characterized in that said through-holes (2114) are provided such that the thickness of the sound-insulating member (21) is between 0.4 and 0.6mm everywhere.
4. The multifunctional superstructure with both mechanical load bearing and underwater acoustic insulation properties of claim 1, wherein a plurality of said through holes (2114) are arranged equidistantly.
5. A multifunctional superstructure with both mechanical load-bearing and underwater acoustic insulation properties according to any of claims 1-4, characterized in that the connecting edges between every two rows of sound-insulating modules (21) are short-edge thin-edge connecting edges and rectangular thin-edge connecting edges in sequence.
6. The multifunctional superstructure with both mechanical bearing and underwater acoustic sound insulation characteristics according to claim 5, characterized in that the sound insulation components (21) arranged in a honeycomb shape are composed of sound insulation units (211), the sound insulation units (211) comprise a whole edge (2111), a half-short-side thin edge (2112) arranged on one side of the whole edge (2111) and a half-rectangular thin edge (2113) arranged on the other side of the whole edge (2111), and every four sound insulation units (211) are symmetrically spliced in pairs to form the sound insulation components (21) and a rectangular thin-edge connecting edge.
7. The multifunctional superstructure with both mechanical load bearing and underwater sound insulation characteristics according to claim 5, wherein the side walls of the sound insulation units (211) have eight molded surfaces, one side wall of the semi-rectangular thin edge (2113) is a first molded surface (201), one side surface of the whole edge (2111) close to the first molded surface (201) is a second molded surface (202), one side surface of the semi-short thin edge (2112) close to the second molded surface (202) is a third molded surface (203), the end surface of the semi-short thin edge (2112) is a fourth molded surface (204), the other side surface of the semi-short thin edge (2112) is a fifth molded surface (205), the other side surface of the whole edge (2111) is a sixth molded surface (206), the other side surface of the semi-rectangular thin edge (3) is a seventh molded surface (207), the end surface of the semi-rectangular thin edge (2113) is an eighth molded surface (208), and the four sound insulation units (211) forming a group of sound insulation assemblies (21) are sequentially a first sound insulation unit (211.1), a second sound insulation unit (211.2), a third sound insulation unit (2113) and a fourth molded surface (211.4);
the distance between the eighth profile (208) in the first sound insulation unit (211.1) and the eighth profile (208) in the second sound insulation unit (211.2) is a 1 The distance between the fourth profile (204) and the eighth profile (208) of the first sound insulation unit (211.1) is a 2 The distance between the eighth molded surface (208) and the intersection line of the second molded surface (202) and the first molded surface (201) is a 3 Wherein a is 2 ＝1/2a 1 ，a 3 ＝3/10a 2 。
8. A multi-functional superstructure with both mechanical load-bearing and hydroacoustic sound-insulating properties according to claim 7, characterised in that the distance between the third profile (203) of the first sound-insulating unit (211.1) and the third profile (203) of the fourth sound-insulating unit (211.4) is b 1 The distance between the third profile (203) and the seventh profile (207) in the first sound insulation unit (211.1) is b 2 A distance b between the first profile (201) and the seventh profile (207) 3 The distance between the second profile surface (202) and the sixth profile surface (206) is b 4 A distance b between the third profile (203) and the fifth profile (205) 5 Wherein, b 2 ＝1/2b 1 ，b 3 ＝1/8b 2 ，b 4 ＝1/4b 2 ，b 5 ＝1/25b 2 。
9. A multi-functional superstructure with both mechanical load-bearing and acoustic-acoustic properties according to claim 7, characterized in that the angle α =110 ° between the first profile (201) and the second profile (202).
10. A multifunctional superstructure with both mechanical load-bearing and underwater acoustic insulation properties according to claim 1, characterized in that the physical parameters of the materials of said cover plate (1) and sound insulation layer (2) are: the elastic modulus E range is more than or equal to 0.1GPa and less than or equal to E and less than or equal to 210GPa, the Poisson ratio eta range is more than or equal to 0.2 and less than or equal to 0.49, and the densityRho range satisfies 1000kg/m 3 ≤ρ≤12000kg/m 3 。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210796157.4A CN115240624A (en) | 2022-07-07 | 2022-07-07 | Multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics |
| GB2304736.8A GB2620466B (en) | 2022-07-07 | 2023-03-30 | Multifunctional metastructure with mechanical bearing and underwater sound insulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210796157.4A CN115240624A (en) | 2022-07-07 | 2022-07-07 | Multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics |
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| CN115240624A true CN115240624A (en) | 2022-10-25 |
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| CN202210796157.4A Pending CN115240624A (en) | 2022-07-07 | 2022-07-07 | Multifunctional superstructure with mechanical bearing and underwater sound insulation characteristics |
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| KR101418418B1 (en) * | 2012-08-28 | 2014-07-09 | 삼성중공업 주식회사 | Sound insulation structure |
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| GB202304736D0 (en) | 2023-05-17 |
| GB2620466A (en) | 2024-01-10 |
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