Vibration and noise reduction device for supporting system combined with acoustic black hole and supporting system

Abstract

The invention discloses a vibration and noise reduction device for a supporting system combined with an acoustic black hole and the supporting system, and relates to the technical field of vibration and noise reduction, the vibration and noise reduction device for the supporting system combined with the acoustic black hole comprises a first acoustic black hole structure and a second acoustic black hole structure, the first acoustic black hole structure is used for being arranged between the supporting structure and a to-be-supported part, and the first acoustic black hole structure makes contact with the supporting structure and the to-be-supported part; the second acoustic black hole structure is used for being connected to a supporting column of the supporting structure. The supporting system comprises a supporting structure and the vibration and noise reduction device for the supporting system combined with the acoustic black hole. The vibration and noise reduction effect is improved, and the probability of engineering problems such as fatigue damage, instability, connection looseness and noise of the supporting structure and the foundation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction and noise reduction, and in particular to a vibration reduction and noise reduction device for a support system combined with an acoustic black hole and a support system. Background Art

[0002] Pipe supports and hangers play a vital role in industrial facilities, primarily used to support, secure, and stabilize piping systems. During use, pipe supports and hangers are subject to pipeline vibrations. These vibrations can be caused by fluid flow, mechanical equipment operation, and environmental factors. This can transfer energy to the supports and hangers and foundation, leading to engineering problems such as fatigue damage, instability, loose connections, and noise. To mitigate the effects of vibration, measures such as vibration analysis, the use of vibration isolation devices, enhanced support design, and regular inspection and maintenance can be used to improve the durability and reliability of supports and hangers, ensuring the safe and stable operation of the piping system.

[0003] The Acoustic Black Hole (ABH) effect actually changes the thickness of the structure, causing the structural impedance to change, resulting in changes in the phase velocity and group velocity of the waves propagating in the structure, thereby achieving wave aggregation at the tip or weak point of the structure. Utilizing the propagation characteristics of bending waves in variable thickness structures, under ideal conditions, when the thickness is reduced to zero, the phase velocity and group velocity of the bending waves are also reduced to zero, resulting in zero reflection of the wave and energy concentration. In actual processing, due to the existence of truncation, the thickness cannot be reduced to zero, but the energy is still concentrated in the minimum thickness area of the structure. Therefore, combining a small amount of damping material in the energy concentration area can effectively enhance the structural loss factor, achieve effective energy absorption, and reduce the vibration of the structure.

[0004] Currently, there is no vibration and noise reduction device for a pipeline support system combined with an acoustic black hole. Summary of the Invention

[0005] The purpose of the present invention is to provide a vibration reduction and noise reduction device and a support system for a support system combined with an acoustic black hole to solve the problems existing in the above-mentioned prior art, improve the vibration reduction and noise reduction effect, and reduce the probability of engineering problems such as fatigue damage, instability, loose connection and noise problems in the support structure and foundation.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a vibration reduction and noise reduction device for a support system combined with an acoustic black hole, comprising a first acoustic black hole structure and a second acoustic black hole structure, wherein:

[0008] The first acoustic black hole structure is used to be arranged between the supporting structure and the object to be supported, and the first acoustic black hole structure is in contact with both the supporting structure and the object to be supported;

[0009] The second acoustic black hole structure is used to be connected to the supporting column of the supporting structure.

[0010] Preferably, the second acoustic black hole structure includes at least two acoustic black hole substructures, and the multiple acoustic black hole substructures are arranged in sequence along the length direction of the support column.

[0011] Preferably, at least one of the acoustic black hole substructures in the second acoustic black hole structure is a one-dimensional acoustic black hole structure, and at least one of the acoustic black hole substructures in the second acoustic black hole structure is a two-dimensional acoustic black hole structure.

[0012] Preferably, the first acoustic black hole structure includes a vibration isolation body and at least two first acoustic black hole bodies, the thickness of each first acoustic black hole body gradually decreases from one end to the other end, the vibration isolation body is arranged between the support structure and the part to be supported and contacts both the support structure and the part to be supported, the extension direction of the support structure along the vibration isolation body is the length direction of the vibration isolation body, the two side walls of the vibration isolation body in the direction perpendicular to the length of the vibration isolation body are respectively the first outer wall and the second outer wall, the first outer wall and the second outer wall are respectively fixedly connected to the large end of at least one of the first acoustic black hole bodies, and the side of each first acoustic black hole body close to the support structure is used to contact the support structure, the multiple first acoustic black hole bodies on the first outer wall are arranged in sequence along the length direction of the vibration isolation body, and the multiple first acoustic black hole bodies on the second outer wall are arranged in sequence along the length direction of the vibration isolation body.

[0013] Preferably, a mounting groove is provided on one side of the vibration isolation body close to the part to be supported, the part to be supported is arranged in the mounting groove, and the shape of the mounting groove matches the shape of the outer side wall of the part of the part to be supported embedded in the mounting groove.

[0014] Preferably, the middle section of each one-dimensional acoustic black hole structure is a beam structure that is thick at both ends and thin in the middle, and the two ends of each one-dimensional acoustic black hole structure are respectively connected to the two support columns of the support structure.

[0015] Preferably, each of the two-dimensional acoustic black hole structures includes a variable thickness two-dimensional acoustic black hole body, and the two outer walls in the thickness direction of each of the variable thickness two-dimensional acoustic black hole bodies are respectively a first rectangular surface and a second rectangular surface, and the projection of each of the first rectangular surfaces on the corresponding second rectangular surface is located inside the corresponding second rectangular surface; each of the variable thickness two-dimensional acoustic black hole bodies has a through hole that passes through the corresponding first rectangular surface and the corresponding second rectangular surface, and a support column is provided in the through hole of each of the variable thickness two-dimensional acoustic black hole bodies; the two outer walls in the length direction of each of the variable thickness two-dimensional acoustic black hole bodies are respectively a first outer wall and a second outer wall, and the two outer walls in the width direction of each of the variable thickness two-dimensional acoustic black hole bodies are respectively a third outer wall and a fourth outer wall; From the end of the corresponding first outer wall close to the corresponding first rectangular surface to the other end of the corresponding first outer wall, the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases; from the end of the corresponding second outer wall close to the corresponding first rectangular surface to the other end of the corresponding second outer wall, the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases; from the end of the corresponding third outer wall close to the corresponding first rectangular surface to the other end of the corresponding third outer wall, the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases; from the end of the corresponding fourth outer wall close to the corresponding first rectangular surface to the other end of the corresponding fourth outer wall, the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases.

[0016] Preferably, each of the two-dimensional acoustic black hole structures also includes a two-dimensional acoustic black hole body of equal thickness, and each of the two-dimensional acoustic black hole bodies of equal thickness is provided with a rectangular hole running through the thickness direction. The two-dimensional acoustic black hole body of equal thickness of each of the two-dimensional acoustic black hole structures is sleeved on the outside of the corresponding two-dimensional acoustic black hole body of variable thickness, and the inner side wall of each of the rectangular holes is in contact with and fixedly connected to the outer side wall of the corresponding two-dimensional acoustic black hole body of variable thickness.

[0017] Preferably, the angle between the line connecting the center point of the first rectangular surface and the center point of the second rectangular surface of each variable thickness two-dimensional acoustic black hole body and the second rectangular surface is an acute angle.

[0018] This embodiment provides a support system, including the support structure and the vibration reduction and noise reduction device for the support system combined with the acoustic black hole, wherein the first acoustic black hole structure is arranged between the support structure and the part to be supported, and the first acoustic black hole structure is in contact with both the support structure and the part to be supported; the second acoustic black hole structure is connected to the support column of the support structure.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] The present invention provides a vibration reduction and noise reduction device and a support system for a support system combined with an acoustic black hole, comprising a first acoustic black hole structure and a second acoustic black hole structure. The first acoustic black hole structure is used to be arranged between a support structure and a part to be supported, and the first acoustic black hole structure is in contact with both the support structure and the part to be supported; the second acoustic black hole structure is used to be connected to the support column of the support structure. The present invention combines the acoustic black hole structure into the support system, and the acoustic black hole structure can actively gather energy and achieve efficient energy consumption. At the same time, the first acoustic black hole structure of the present invention, which is arranged between the support structure and the part to be supported, can reduce vibration and noise of the part to be supported, and reduce the vibration transmission between the part to be supported and the support structure; the second acoustic black hole structure can reduce vibration of the support structure. Through the joint action of the first acoustic black hole structure and the second acoustic black hole structure, the vibration reduction and noise reduction effect is improved, and the probability of engineering problems such as fatigue damage, instability, loose connection and noise problems in the support structure and foundation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a vibration and noise reduction device for a support system combined with an acoustic black hole and a support system provided by the present invention;

[0023] Figure 2 Schematic diagram of thickness variation of the first acoustic black hole structure and the one-dimensional acoustic black hole structure;

[0024] Figure 3 A top view of the two-dimensional acoustic black hole structure provided in Example 1;

[0025] Figure 4 for Figure 3 Cross-sectional view of AA and BB;

[0026] Figure 5 A diagram of the vibration energy concentration of the energy concentration portion of the vibration reduction and noise reduction device for a support system combined with an acoustic black hole provided in Example 1;

[0027] Figure 6 A comparison diagram of the transfer rates between the input and output ends of a conventional support and hanger and the new support and hanger provided in Example 2;

[0028] In the figure: 100. Vibration and noise reduction device for a support system combined with an acoustic black hole; 200. Support system; 1. Support structure; 101. Support column; 102. Beam; 2. Parts to be supported; 3. First acoustic black hole structure; 301. Vibration isolation body; 302. First acoustic black hole body; 303. Mounting groove; 4. One-dimensional acoustic black hole structure; 5. Two-dimensional acoustic black hole structure; 501. Two-dimensional acoustic black hole body with variable thickness; 502. First rectangular surface; 503. Second rectangular surface; 504. First outer wall; 505. Second outer wall; 506. Third outer wall; 507. Fourth outer wall; 508. Two-dimensional acoustic black hole body with equal thickness; 509. Rectangular structure; 510. Ring structure; 6. Protective shell; 7. Damping structure. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that in the description of the present invention, terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "center", "longitudinal", "lateral", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "clockwise", and "counterclockwise" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] The purpose of the present invention is to provide a vibration reduction and noise reduction device and a support system for a support system combined with an acoustic black hole to solve the problems existing in the above-mentioned prior art, improve the vibration reduction and noise reduction effect, and reduce the probability of engineering problems such as fatigue damage, instability, loose connection and noise problems in the support structure and foundation.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] like Figures 1 to 6 As shown, this embodiment provides a vibration and noise reduction device 100 for a support system incorporating an acoustic black hole, comprising a first acoustic black hole structure 3 and a second acoustic black hole structure. The first acoustic black hole structure 3 is disposed between a support structure 1 and a component to be supported 2, making contact with both the support structure 1 and the component to be supported 2; the second acoustic black hole structure is connected to a support column 101 of the support structure 1. The present invention incorporates an acoustic black hole structure into a support system 200. The acoustic black hole structure can actively converge energy, achieving efficient energy consumption, and is lightweight and space-saving. At the same time, in this embodiment, the first acoustic black hole structure 3 arranged between the supporting structure 1 and the part to be supported 2 can reduce vibration and noise of the part to be supported 2, and reduce the vibration transmission between the part to be supported 2 and the supporting structure 1; the second acoustic black hole structure can reduce vibration of the supporting structure 1. Through the joint action of the first acoustic black hole structure 3 and the second acoustic black hole structure, the vibration reduction and noise reduction effect is improved, and the probability of engineering problems such as fatigue damage, instability, loose connection and noise problems in the supporting structure 1 and the foundation is reduced.

[0036] In some embodiments, the second acoustic black hole structure includes at least two acoustic black hole substructures, which are sequentially arranged along the length of support column 101. As vibration waves propagate along support column 101, they pass through each of the multiple acoustic black hole substructures, which gradually converge and dissipate energy, thereby improving energy efficiency and enhancing vibration and noise reduction.

[0037] In some specific embodiments, at least one acoustic black hole substructure in the second acoustic black hole structure is a one-dimensional acoustic black hole structure 4, and at least one acoustic black hole substructure in the second acoustic black hole structure is a two-dimensional acoustic black hole structure 5. Both the one-dimensional acoustic black hole structure 4 and the two-dimensional acoustic black hole structure 5 can produce good vibration suppression effects on high-frequency vibrations, wherein the one-dimensional acoustic black hole structure 4 can also have good vibration reduction and noise reduction effects on vibrations of a specific frequency, and the one-dimensional acoustic black hole structure 4 can have a lower modal frequency, so the one-dimensional acoustic black hole structure 4 has a good vibration reduction effect on a specific frequency of a lower frequency. The two-dimensional acoustic black hole structure 5 has rich modal frequencies, has good vibration reduction and noise reduction effects on multi-directional low-frequency waves, and has a good vibration reduction effect on vibrations within a certain frequency band. The combination of the two can complement each other in frequency bands to achieve vibration and noise control of specific low-frequency and medium-frequency wide-bands. Both the one-dimensional acoustic black hole structure 4 and the two-dimensional acoustic black hole structure 5 are preferably multiple, Figure 1 The “***” symbol in the figure indicates that the middle repeating structure is omitted.

[0038] In some specific embodiments, the first acoustic black hole structure 3 includes a vibration isolation body 301 and at least two first acoustic black hole bodies 302, the thickness of each first acoustic black hole body 302 gradually decreases from one end to the other end, the vibration isolation body 301 is arranged between the support structure 1 and the part to be supported 2 and contacts both the support structure 1 and the part to be supported 2, the extension direction of the support structure 1 along the vibration isolation body 301 is the length direction of the vibration isolation body 301, the two side walls of the vibration isolation body 301 in the direction perpendicular to the length of the vibration isolation body 301 are respectively the first outer wall and the second outer wall, the first outer wall and the second outer wall are respectively fixedly connected to the large end of at least one first acoustic black hole body 302, the side of each first acoustic black hole body 302 close to the support structure 1 is used to contact the support structure 1, the multiple first acoustic black hole bodies 302 on the first outer wall are arranged in sequence along the length direction of the vibration isolation body 301, and the multiple first acoustic black hole bodies 302 on the second outer wall are arranged in sequence along the length direction of the vibration isolation body 301. The vibration isolation body 301 is used to support the supported component 2, reducing vibration transmission between the supported component 2 and the supporting structure 1. Vibration can be transmitted from the isolation body 301 to the first acoustic black hole body 302 and then to the end of the first acoustic black hole body 302 to achieve vibration reduction and noise reduction. The thickness of the first acoustic black hole body 302 is in the height direction.

[0039] In some specific embodiments, a mounting groove 303 is provided on one side of the vibration isolation body 301 close to the part to be supported 2, and the part to be supported 2 is arranged in the mounting groove 303. The shape of the mounting groove 303 matches the shape of the outer wall of the part to be supported 2 embedded in the mounting groove 303, so as to increase the contact area between the mounting groove 303 and the part to be supported 2, and even make the mounting groove 303 completely contact with the part to be supported 2. On the one hand, it is beneficial to improve the installation stability of the part to be supported 2, and on the other hand, it is beneficial to improve the vibration isolation and vibration reduction effects.

[0040] In some specific embodiments, the middle section of each one-dimensional acoustic black hole structure 4 is a beam-like structure with thick ends and a thin center. The two ends of each one-dimensional acoustic black hole structure 4 are fixedly connected to the two support columns 101 of the support structure 1, forming a one-dimensional bridge-type acoustic black hole beam. This arrangement can appropriately increase the stiffness of the thinnest portion of the one-dimensional acoustic black hole structure 4, preventing significant deformation during use and providing better stability.

[0041] In some specific embodiments, each two-dimensional acoustic black hole structure 5 includes a variable thickness two-dimensional acoustic black hole body 501, and the two outer walls of each variable thickness two-dimensional acoustic black hole body 501 in the thickness direction are respectively a first rectangular surface 502 and a second rectangular surface 503, and the projection of each first rectangular surface 502 on the corresponding second rectangular surface 503 is located inside the corresponding second rectangular surface 503; each variable thickness two-dimensional acoustic black hole body 501 has a through hole that passes through the corresponding first rectangular surface 502 and the corresponding second rectangular surface 503, and a support column 101 is sleeved in the through hole of each variable thickness two-dimensional acoustic black hole body 501; the two outer walls of each variable thickness two-dimensional acoustic black hole body 501 in the length direction are respectively a first outer wall 504 and a second outer wall 505, and the two outer walls of each variable thickness two-dimensional acoustic black hole body 501 in the width direction are respectively a third outer wall 506 and the fourth outer wall 507; from the end of the corresponding first outer wall 504 close to the corresponding first rectangular surface 502 to the other end of the corresponding first outer wall 504, the thickness of each variable thickness two-dimensional acoustic black hole body 501 gradually decreases; from the end of the corresponding second outer wall 505 close to the corresponding first rectangular surface 502 to the other end of the corresponding second outer wall 505, the thickness of each variable thickness two-dimensional acoustic black hole body 501 gradually decreases; from the end of the corresponding third outer wall 506 close to the corresponding first rectangular surface 502 to the other end of the corresponding third outer wall 506, the thickness of each variable thickness two-dimensional acoustic black hole body 501 gradually decreases; from the end of the corresponding fourth outer wall 507 close to the corresponding first rectangular surface 502 to the other end of the corresponding fourth outer wall 507, the thickness of each variable thickness two-dimensional acoustic black hole body 501 gradually decreases. That is, the variable thickness two-dimensional acoustic black hole body 501 includes a rectangular structure 509 and an annular structure 510. The annular structure 510 is arranged outside the rectangular structure 509. The inner wall of the annular structure 510 contacts and is fixedly connected to the outer wall of the rectangular structure 509. The four outer surfaces of the annular structure 510 on the side away from the support structure 1 are respectively the first outer wall 504, the second outer wall 505, the third outer wall 506 and the fourth outer wall 507; along the extension direction of the first outer wall 504, the thickness of the annular structure 510 gradually decreases from the inside to the outside, along the extension direction of the second outer wall 505, the thickness of the annular structure 510 gradually decreases from the inside to the outside, along the extension direction of the third outer wall 506, the thickness of the annular structure 510 gradually decreases from the inside to the outside, and along the extension direction of the fourth outer wall 507, the thickness of the annular structure 510 gradually decreases from the inside to the outside.The vibration energy on the support column 101 is transmitted from the inner wall of the through hole to the positions corresponding to the first outer wall 504, the second outer wall 505, the third outer wall 506, and the fourth outer wall 507. The thickness of the variable thickness two-dimensional acoustic black hole body 501 at the positions of the first outer wall 504, the second outer wall 505, the third outer wall 506, and the fourth outer wall 507 gradually decreases from the inside to the outside. Variable thickness sections are set on the four sides of the variable thickness two-dimensional acoustic black hole body 501, so that the vibration energy can be gathered and consumed along the four sides of the variable thickness two-dimensional acoustic black hole body 501, which is beneficial to improving the vibration reduction effect.

[0042] In some specific embodiments, each two-dimensional acoustic black hole structure 5 further includes a two-dimensional acoustic black hole body 508 of uniform thickness. Each uniform thickness two-dimensional acoustic black hole body 508 is provided with a rectangular hole extending through the thickness direction. The uniform thickness two-dimensional acoustic black hole body 508 of each two-dimensional acoustic black hole structure 5 is sleeved over the corresponding variable thickness two-dimensional acoustic black hole body 501. The inner sidewall of each rectangular hole contacts and is fixedly connected to the outer sidewall of the corresponding variable thickness two-dimensional acoustic black hole body 501. The thickness direction of the variable thickness two-dimensional acoustic black hole body 501 and the thickness direction of the uniform thickness two-dimensional acoustic black hole body 508 are the height direction of the two-dimensional acoustic black hole structure 5.

[0043] In some specific embodiments, the thickness of the first acoustic black hole body 302 decreases exponentially; the thickness of the middle section of each one-dimensional acoustic black hole structure 4 decreases exponentially from both ends to the middle of the corresponding one-dimensional acoustic black hole structure 4; the longitudinal section of each first outer wall 504 and each second outer wall 505 is an exponential curve, and the cross section of each third outer wall 506 and each fourth outer wall 507 is an exponential curve. As a preferred embodiment, the thickness of each variable thickness section from both ends of the middle section of each one-dimensional acoustic black hole structure 4 to the middle of each one-dimensional acoustic black hole structure 4 is a variable thickness section, and the thickness expression of each variable thickness section of the first acoustic black hole body 302 is h(x)=εx m +h0, where h(x) represents the thickness of each variable thickness segment of the first acoustic black hole body 302; ε represents a coefficient (negative number); x represents the distance from a point on each variable thickness segment of the first acoustic black hole body 302 to the thicker end of the variable thickness segment; m is a constant, and m≥2; h0 represents the thickness of the thickest end of each variable thickness segment of the first acoustic black hole body 302. The thickness expression of the four thickness gradient segments of the variable thickness two-dimensional acoustic black hole body 501 is h(w i )=aw i n +h1,i=1,2,3,4, where h(w i ) represents the thickness of the variable thickness two-dimensional acoustic black hole body 501, w i, i = 1, 2, 3, 4 respectively represent the distance from any point on the four sides of the first rectangular surface 502 to the corresponding parallel side of the second rectangular surface 503, i is the sequence number of the four sides of the first rectangular surface 502, a represents a coefficient, n ≥ 2, and h1 represents the thickest thickness of the variable-thickness two-dimensional acoustic black hole body 501. It should be noted that the two long sides of the first rectangular surface 502 correspond one-to-one with the two long sides of the second rectangular surface 503, and the two short sides of the first rectangular surface 502 correspond one-to-one with the two short sides of the second rectangular surface 503. The two long sides of the first rectangular surface 502 and the two long sides of the second rectangular surface 503 are parallel to each other, and the two short sides of the first rectangular surface 502 and the two short sides of the second rectangular surface 503 are parallel to each other.

[0044] In some specific embodiments, equal thickness segments are provided at both ends of the one-dimensional acoustic black hole structure 4. The thickness variation diagrams of the first acoustic black hole structure 3 and the one-dimensional acoustic black hole structure 4 are respectively Figure 2 (a) and Figure 2 As shown in (b), Figure 2 (a) and Figure 2 The curve equations corresponding to (b) are shown in equations (1) and (2), respectively, where h(x) is the y value of the curve shown in the figure.

[0045]

[0046]

[0047] In some specific embodiments, the angle between the line connecting the center point of the first rectangular surface 502 and the center point of the second rectangular surface 503 of each variable-thickness two-dimensional acoustic black hole body 501 and the second rectangular surface 503 is acute, forming a two-dimensional eccentric rectangular acoustic black hole structure. This asymmetric structure can enrich the modal conditions of the acoustic black hole structure, increase the probability of frequency coupling between the acoustic black hole structure and the main structure, and thus enhance the dynamic vibration absorption capacity of the acoustic black hole structure. The eccentric design can also reduce the lowest frequency of the vibration absorber structure, thereby improving the low-frequency vibration reduction capability of the acoustic black hole structure.

[0048] In some specific embodiments, a protective shell 6 is further included, and the protective shell 6 is arranged outside the first acoustic black hole structure 3 and the second acoustic black hole structure.

[0049] In some specific implementations, the vibration isolation body 301 is made of vibration isolation rubber, and the mounting groove 303 is an arc-shaped groove.

[0050] In some embodiments, the first rectangular surface 502 and the second rectangular surface 503 are parallel to each other.

[0051] In some specific embodiments, the one-dimensional acoustic black hole structure 4 and the two-dimensional acoustic black hole structure 5 are both connected to the support column 101 by bolts.

[0052] In some specific embodiments, the one-dimensional acoustic black hole structure 4 and the two-dimensional acoustic black hole structure 5 are both made of aluminum, and the first acoustic black hole structure 3 is made of rubber.

[0053] In some specific embodiments, the surface of the two-dimensional acoustic black hole body 508 of uniform thickness away from the first rectangular surface 502 is coplanar with the second rectangular surface 503 , and a damping structure 7 is provided on the surface of the two-dimensional acoustic black hole body 508 of uniform thickness away from the first rectangular surface 502 .

[0054] Example 2

[0055] This embodiment provides a support system 200, including a support structure 1 and a vibration reduction and noise reduction device 100 for a support system combined with an acoustic black hole in Example 1. The first acoustic black hole structure 3 is arranged between the support structure 1 and the part to be supported 2, and the first acoustic black hole structure 3 is in contact with both the support structure 1 and the part to be supported 2; the second acoustic black hole structure is connected to the support column 101 of the support structure 1.

[0056] In some embodiments, support structure 1 is a pipe support and hanger structure, and supported member 2 is a pipe. The pipe support and hanger structure includes a crossbeam 102 and two support columns 101 fixedly connected to crossbeam 102. A first acoustic black hole structure 3 is disposed above crossbeam 102, and a pipe is disposed above first acoustic black hole structure 3.

[0057] Figure 6 The vibration transmission rate curve between the input end (the part to be supported 2) and the output end (the lower ends of the two support columns 101) when using the traditional support and hanger structure and the new support and hanger structure in this embodiment is shown. From the transmission rate curve, the force generated by the part to be supported 2 during operation is used as the excitation force of the support system 200, that is, the input force F1. The force applied to the constraint boundary (the ground, etc.) by the lower ends of the two support columns 101 is the output force F2. The transmission rate is F1 / F2. When the transmission rate is less than 1 (less than 0 after taking the logarithm), it proves that the excitation force generated by the equipment is transmitted to the ground to a certain extent. Figure 6 It can be seen that the transmission rate of the support system 200 of this embodiment is lower and is less than 0, which means that the new support and hanger structure of this embodiment has better vibration isolation performance than the traditional support and hanger structure.

[0058] In summary, this embodiment provides a pipe support and hanger structure combined with an acoustic black hole. Through the combined action of multiple acoustic black hole structures, the traditional pipe support and hanger structure is improved so that the support and hanger structure can support the pipe while also having a vibration suppression effect. Specifically, the vibration energy transmitted from the pipe to the support and hanger structure is dissipated through the energy gathering and damping dissipation capabilities of the acoustic black hole structure, thereby reducing the vibration energy transmitted from the pipe to the base, and using a vibration absorption method instead of a vibration isolation method to achieve vibration control. Since the thickness of the acoustic black hole region decreases exponentially, the wave propagation speed decreases as the thickness decreases, and the wave vibration amplitude increases as the wavelength decreases. The waves gather in areas with smaller thicknesses, and the acoustic black hole effect and the characteristics of dynamic vibration absorption are utilized to perform broadband vibration reduction and noise reduction on the support and hanger structure. This embodiment has a simple structure, is easy to use, and is low in cost. This embodiment has a wide range of applications, and the corresponding acoustic black hole parameters can be designed according to the specific vibration reduction frequency band to achieve the best vibration reduction effect.

[0059] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A vibration and noise reduction device for a support system combined with an acoustic black hole, characterized by: It includes a first acoustic black hole structure and a second acoustic black hole structure, wherein: The first acoustic black hole structure is used to be arranged between the supporting structure and the object to be supported, and the first acoustic black hole structure is in contact with both the supporting structure and the object to be supported; The second acoustic black hole structure is used to be connected to the supporting column of the supporting structure.

2. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 1, characterized in that: The second acoustic black hole structure includes at least two acoustic black hole substructures, and the multiple acoustic black hole substructures are arranged in sequence along the length direction of the support column.

3. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 2, characterized in that: At least one of the acoustic black hole substructures in the second acoustic black hole structure is a one-dimensional acoustic black hole structure, and at least one of the acoustic black hole substructures in the second acoustic black hole structure is a two-dimensional acoustic black hole structure.

4. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 1, characterized in that: The first acoustic black hole structure includes a vibration isolation body and at least two first acoustic black hole bodies, the thickness of each first acoustic black hole body gradually decreases from one end to the other end, the vibration isolation body is arranged between the support structure and the part to be supported and contacts both the support structure and the part to be supported, the extension direction of the support structure along the vibration isolation body is the length direction of the vibration isolation body, the two side walls of the vibration isolation body in the direction perpendicular to the length of the vibration isolation body are respectively the first outer wall and the second outer wall, the first outer wall and the second outer wall are respectively fixedly connected to the large end of at least one of the first acoustic black hole bodies, and the side of each first acoustic black hole body close to the support structure is used to contact the support structure, the multiple first acoustic black hole bodies on the first outer wall are arranged in sequence along the length direction of the vibration isolation body, and the multiple first acoustic black hole bodies on the second outer wall are arranged in sequence along the length direction of the vibration isolation body.

5. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 4, characterized in that: A mounting groove is provided on one side of the vibration isolation body close to the part to be supported. The part to be supported is arranged in the mounting groove. The shape of the mounting groove matches the shape of the outer side wall of the part of the part to be supported embedded in the mounting groove.

6. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 3, characterized in that: The middle section of each one-dimensional acoustic black hole structure is a beam structure that is thick at both ends and thin in the middle, and the two ends of each one-dimensional acoustic black hole structure are respectively connected to the two support columns of the support structure.

7. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 6, characterized in that: Each of the two-dimensional acoustic black hole structures includes a variable thickness two-dimensional acoustic black hole body, and the two outer walls of each of the variable thickness two-dimensional acoustic black hole bodies in the thickness direction are respectively a first rectangular surface and a second rectangular surface, and the projection of each of the first rectangular surfaces on the corresponding second rectangular surface is located inside the corresponding second rectangular surface; each of the variable thickness two-dimensional acoustic black hole bodies has a through hole that passes through the corresponding first rectangular surface and the corresponding second rectangular surface, and a support column is provided in the through hole of each of the variable thickness two-dimensional acoustic black hole bodies; the two outer walls of each of the variable thickness two-dimensional acoustic black hole bodies in the length direction are respectively a first outer wall and a second outer wall, and the two outer walls of each of the variable thickness two-dimensional acoustic black hole bodies in the width direction are respectively a third outer wall and a fourth outer wall; by the corresponding The thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases from the end of the first outer wall close to the corresponding first rectangular surface to the other end of the corresponding first outer wall; the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases from the end of the corresponding second outer wall close to the corresponding first rectangular surface to the other end of the corresponding second outer wall; the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases from the end of the corresponding third outer wall close to the corresponding first rectangular surface to the other end of the corresponding third outer wall; the thickness of each variable thickness two-dimensional acoustic black hole body gradually decreases from the end of the corresponding fourth outer wall close to the corresponding first rectangular surface to the other end of the corresponding fourth outer wall.

8. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 7, characterized in that: Each of the two-dimensional acoustic black hole structures also includes a two-dimensional acoustic black hole body of equal thickness, and each of the two-dimensional acoustic black hole bodies of equal thickness is provided with a rectangular hole running through the thickness direction. The two-dimensional acoustic black hole body of equal thickness of each of the two-dimensional acoustic black hole structures is sleeved on the outside of the corresponding two-dimensional acoustic black hole body of variable thickness, and the inner side wall of each of the rectangular holes is in contact with and fixedly connected to the outer side wall of the corresponding two-dimensional acoustic black hole body of variable thickness.

9. The vibration and noise reduction device for a support system combined with an acoustic black hole according to claim 7, characterized in that: The angle between the line connecting the center point of the first rectangular surface and the center point of the second rectangular surface of each variable thickness two-dimensional acoustic black hole body and the second rectangular surface is an acute angle.

10. A support system, characterized in that: The device comprises the support structure and the vibration reduction and noise reduction device for a support system combined with an acoustic black hole as described in claims 1 to 9, wherein the first acoustic black hole structure is arranged between the support structure and the part to be supported, and the first acoustic black hole structure is in contact with both the support structure and the part to be supported; and the second acoustic black hole structure is connected to the support column of the support structure.

Images