Damping and noise reduction device and piping system
By combining damping structures and mass structures with a micro-perforated array vibration reduction and noise reduction device, the problem of vibration and noise control in nuclear power pipeline systems has been solved, effectively suppressing multi-mode vibration and broadband noise, and improving the safety and comfort of the pipeline system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG NUCLEAR POWER CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-26
AI Technical Summary
The vibration of nuclear power pipeline systems under fluid excitation causes problems such as loosening of connectors, fatigue damage to pipelines, and noise pollution. Traditional dynamic vibration absorbers are difficult to effectively control multimode vibration and broadband noise.
A vibration reduction and noise reduction device combining damping structure and mass structure with micro-perforated array is used to form a spring-mass multi-degree-of-freedom resonant system through the local resonant bandgap vibration reduction mechanism and the sound absorption mechanism of micro-perforated plate. The number of masses and damping structures can be adaptively increased or decreased to control multiple resonant frequencies.
It effectively suppresses pipeline vibration, reduces noise, and improves the safety and comfort of pipeline systems. It has a simple structure, is lightweight, has good applicability, and its modular design facilitates maintenance.
Smart Images
Figure CN224414669U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pipeline vibration reduction and noise reduction equipment, and in particular to a vibration reduction and noise reduction device and pipeline system. Background Technology
[0002] Piping systems are critical infrastructure in the nuclear power industry, primarily used for transporting high-temperature steam and water. Vibration under fluid excitation has always been a focus of attention in nuclear power engineering. Excessive pipeline vibration can lead to loose connections, detachment of branch pipes, fatigue damage, and even rupture. It also generates significant noise pollution, severely deteriorates the working environment in controlled areas, and can even cause leaks of high-temperature steam and water. This poses risks to the health and safety of workers and the safe operation of equipment, and disrupts normal production. Therefore, effectively controlling pipeline vibration is crucial for ensuring the safe and stable operation of nuclear power plants.
[0003] For the vibration problem of nuclear power pipelines, the current solution mainly involves using dynamic vibration absorbers to suppress areas of strong vibration. However, pipeline vibration and noise are inseparable, and the efficiency of radiated noise varies significantly under different vibration modes. Traditional dynamic vibration absorbers are mainly used to suppress structural resonance, but their effect on controlling broadband noise generated by the pipeline system is relatively limited. Moreover, pipeline vibration often contains multiple resonant frequency components, and traditional dynamic vibration absorbers are often designed to reduce vibration at only a single frequency, making it difficult to achieve multi-mode vibration control.
[0004] Therefore, a vibration reduction and noise reduction device and pipeline system are needed to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a vibration reduction and noise reduction device and pipeline system. This device can effectively suppress pipeline resonance and reduce the radiated noise of the structure. The micro-perforated structure can further absorb broadband noise, which is beneficial to solving the vibration and noise problem of nuclear power pipeline systems.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A vibration reduction and noise reduction device includes a damping structure and a mass structure. Several damping structures are arranged in parallel and spaced apart. A mass structure is arranged between any two damping structures. Each mass structure is provided with a micro-perforated array structure. Each damping structure is provided with a first receiving hole. Multiple first receiving holes are used to accommodate the connected pipeline.
[0008] As an optional technical solution, each of the damping structures includes two interlocking damping elements, and each of the mass structures includes two interlocking mass units. Several damping elements on the same side are arranged in parallel and spaced apart, with a corresponding mass unit between any two damping elements to form a vibration reduction and noise reduction component. Several damping elements on the other side are arranged in parallel and spaced apart, with a corresponding mass unit between any two damping elements to form another vibration reduction and noise reduction component. Two vibration reduction and noise reduction components are interlocked to form the vibration reduction and noise reduction device.
[0009] As an optional technical solution, the damping structure includes an end damping structure and an internal damping structure. The two end damping structures are arranged in parallel and spaced apart, and a plurality of internal damping structures are arranged in parallel and spaced apart between the two end damping structures. The vibration reduction and noise reduction device also includes two end cap structures, which are detachably connected to the two end damping structures in a one-to-one correspondence.
[0010] As an optional technical solution, the end cap structure includes two end caps that are interlocked and detachably connected to form the end cap structure; the end damping structure includes two interlocked end damping members, each of which has a mounting groove, and the two end caps of the end cap structure are inserted into the two mounting grooves of the two end damping members in a one-to-one correspondence; the first fixing member is used to detachably connect the end cap to the end damping member.
[0011] As an optional technical solution, both ends of the end cap are provided with connecting plates. When the two end caps are snapped together, the two connecting plates of one end cap and the two connecting plates of the other end cap are detachably connected one-to-one by a second fixing member, so that the end cap structure is connected to the pipeline to be connected.
[0012] As an optional technical solution, the damping structure has a slot on its end face facing the mass structure, and the mass structure is inserted into the slot.
[0013] As an optional technical solution, the damping structure is a damping rubber ring, and the mass structure is a metal mass unit.
[0014] As an optional technical solution, the micro-perforated array structure includes a plurality of uniformly arranged holes, and the micro-perforated array structure satisfies the following formula:
[0015]
[0016] Where r is the relative acoustic impedance and m is the relative acoustic mass. f0 is the sound absorption center frequency, μ is the kinematic viscosity coefficient, c is the sound velocity, p is the perforation rate, t is the plate thickness of the metal mass unit, and d is the hole diameter.
[0017] As an optional technical solution, the damping rubber ring and the metal mass unit satisfy the following formula:
[0018]
[0019] M=ρπD2TL
[0020] Where F is the target resonant peak frequency, K is the equivalent stiffness, M is the equivalent mass, E is the Young's modulus of the damping rubber, D1 is the outer diameter of the pipe, B is the axial width of the damping rubber ring, H is the thickness of the damping rubber ring, ρ is the density of the metal mass element, D2 is the diameter of the metal mass element, t is the thickness of the metal mass element, and L is the axial length of the metal mass element.
[0021] This utility model also adopts the following technical solution:
[0022] A pipeline system comprising pipes and vibration damping and noise reduction devices as described above, wherein a plurality of the vibration damping and noise reduction devices are arranged at intervals along the extension direction of the pipes.
[0023] The beneficial effects of this utility model are:
[0024] This utility model discloses a vibration reduction and noise reduction device, which includes a damping structure and a mass structure. Several damping structures are arranged in parallel and at intervals, and a mass structure is placed between any two damping structures. Each mass structure has a micro-perforated array structure, and each damping structure has a first receiving hole. Multiple first receiving holes are used to accommodate connected pipelines. This vibration reduction and noise reduction device combines the local resonant bandgap vibration reduction mechanism and the sound absorption mechanism of micro-perforated plates. Through integrated design, the mass structure and the micro-perforated structure are combined to achieve the purpose of low-frequency vibration control and broadband noise control.
[0025] Furthermore, the vibration reduction and noise reduction device can adaptively increase or decrease the number of mass structures and damping structures to form a spring-mass multi-degree-of-freedom resonant system, achieving vibration control at multiple resonant frequencies without significantly increasing the structural weight.
[0026] Furthermore, compared with existing structures, this patent adopts a modular design, which is simple in structure, lightweight, has good applicability, and is highly designable and maintainable.
[0027] This utility model also discloses a pipeline system, which includes a pipeline and the vibration damping and noise reduction devices described above, with a plurality of vibration damping and noise reduction devices arranged at intervals along the extension direction of the pipeline. By incorporating the aforementioned vibration damping and noise reduction devices, this pipeline system can effectively suppress pipeline vibration and reduce the noise generated by pipeline vibration, thereby improving the performance of the pipeline system. Attached Figure Description
[0028] Figure 1 This is an isometric view of the vibration reduction and noise reduction device provided in this embodiment of the utility model;
[0029] Figure 2 This is a front view of the vibration reduction and noise reduction device provided in this embodiment of the utility model;
[0030] Figure 3 This is a cross-sectional view of the vibration reduction and noise reduction device provided in this embodiment of the utility model;
[0031] Figure 4 This is a side view of the vibration reduction and noise reduction device provided in this embodiment of the utility model;
[0032] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;
[0033] Figure 6 This is a simulation diagram of the vibration reduction and noise reduction device provided in this embodiment of the invention applied to the connected and managed energy band structure.
[0034] Figure 7 The vibration reduction and noise reduction device provided in this embodiment of the utility model is applied to the sound absorption coefficient curve of the connected and managed device.
[0035] In the picture:
[0036] 10. Damping structure; 11. End damping structure; 12. Internal damping structure;
[0037] 20. Mass structure; 21. Micro-perforated array structure; 211. Hole;
[0038] 30. End cap structure; 31. Connecting plate;
[0039] 40. First fastener;
[0040] 50. Second fastener. Detailed Implementation
[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection 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 utility model based on the specific circumstances.
[0043] In this invention, unless otherwise explicitly 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 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 directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0045] like Figures 1 to 7 As shown, this embodiment provides a vibration reduction and noise reduction device, which includes a damping structure 10 and a mass structure 20. Several damping structures 10 are arranged in parallel and spaced apart, with a mass structure 20 positioned between any two damping structures 10. Each mass structure 20 is provided with a micro-perforated array structure 21, and each damping structure 10 is provided with a first receiving hole. Multiple first receiving holes are used to accommodate the connected pipeline. Specifically, in this embodiment, the damping structure 10 and the mass structure 20 of this vibration reduction and noise reduction device are arranged in a staggered manner, forming a spring-like structure, thus forming a spring-mass resonance system. This effectively suppresses the vibration of the connected pipeline, thereby reducing the probability of the connected pipeline becoming loose and improving the safety of the pipeline system. Simultaneously, each mass structure 20 is provided with a micro-perforated array structure 21, which can exert a micro-perforated sound absorption effect, thereby effectively reducing noise and improving the comfort of the working environment.
[0046] Furthermore, each damping structure 10 includes two interlocking damping elements, and each mass structure 20 includes two interlocking mass units. Several damping elements on the same side are arranged parallel and spaced apart, with a corresponding mass unit positioned between any two damping elements to form a vibration damping and noise reduction component. Several damping elements on the other side are arranged parallel and spaced apart, with a corresponding mass unit positioned between any two damping elements to form another vibration damping and noise reduction component. The two vibration damping and noise reduction components are interlocked to form a vibration damping and noise reduction device. Specifically, in this embodiment, dividing the vibration damping and noise reduction device into two interlocking vibration damping and noise reduction components facilitates installation of the device onto the connected pipeline, improving convenience during use.
[0047] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, the damping structure 10 includes end damping structures 11 and internal damping structures 12. The two end damping structures 11 are arranged in parallel and spaced apart, and a plurality of internal damping structures 12 are arranged in parallel and spaced apart between the two end damping structures 11. The vibration reduction and noise reduction device also includes two end cap structures 30, which are detachably connected to the two end damping structures 11 in a one-to-one correspondence. Specifically, in this embodiment, the end cap structures 30 can support the damping structure 10 and the mass structure 20, thereby increasing the structural strength of the vibration reduction and noise reduction device and ensuring the connection stability between the vibration reduction and noise reduction device and the connected pipeline.
[0048] Furthermore, the end cap structure 30 includes two end caps that are interlocked and detachably connected to form the end cap structure 30; the end damping structure 11 includes two interlocked end damping members, each of which has a mounting groove. The two end caps of the end cap structure 30 are inserted into the two mounting grooves of the two end damping members in a one-to-one correspondence; the first fixing member 40 is used to detachably connect the end caps to the end damping members. Specifically, in this embodiment, the two end caps are interlocked to form the end cap structure 30, that is, the two end caps and the two vibration damping and noise reduction components are set in a one-to-one correspondence, so that the vibration damping and noise reduction device is connected to the connected pipeline through the two end cap structures 30, thereby ensuring the connection stability of the vibration damping and noise reduction device. Furthermore, the one-to-one insertion of the two end caps of the end cap structure 30 into the two mounting grooves of the two end damping members ensures the installation stability of the end caps and damping members.
[0049] Optionally, in this embodiment, as Figure 1 , Figure 3 and Figure 4As shown, the end cap is provided with a first connecting hole, the end damping member is provided with a second connecting hole, and the first fixing member 40 passes through the first connecting hole and the second connecting hole to detachably connect the end damping member and the end cap, so as to ensure the connection stability of the end cap and the end damping member.
[0050] Optionally, in this embodiment, the first connecting hole is a through hole, the second connecting hole is a threaded hole, and the first fixing member 40 is a bolt. After the bolt passes through the through hole, it is threadedly connected to the threaded hole, thereby ensuring the connection stability of the end cap and the end damping member.
[0051] In another embodiment, the first fixing member 40 is a screw, which passes through the through hole and is threadedly connected to the end damping member, which will not be described in detail here.
[0052] Optionally, in this embodiment, as Figure 3 As shown, the end damping component is provided with a mounting groove, and the end cap is inserted into the mounting groove, which can further improve the support performance of the end cap structure 30 for the vibration reduction and noise reduction device, and ensure its structural strength and the stability of its connection to the connected pipeline.
[0053] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, both ends of the end cap are provided with connecting plates 31. When the two end caps are fastened together, the two connecting plates 31 of one end cap and the two connecting plates 31 of the other end cap are detachably connected one-to-one by the second fixing member 50, so that the end cap structure 30 is connected to the pipeline to be connected. Specifically, in this embodiment, the connecting plate 31 of the end cap is perpendicular to the plate surface of the end cap. A third connecting hole 211 is provided on the connecting plate 31. When the two end caps are fastened together, the two connecting plates 31 located at the same end of the two end caps abut against each other, and the two third connecting holes 211 on the two connecting plates 31 are connected. The second fixing member 50 is a bolt and a nut. The bolt passes through the two third connecting holes 211 and is threadedly connected to the nut, thereby detachably connecting the two end caps. This ensures the connection stability of the end cap structure 30 and allows the pipeline to be connected to be sandwiched between the two end caps, thereby ensuring the connection stability and firmness with the pipeline to be connected.
[0054] Specifically, in this embodiment, the end cap is made of aluminum alloy. Aluminum alloy has the advantages of being lightweight, high-strength, and corrosion-resistant, which can reduce the extra load on the connected pipeline and ensure the overall structural strength of the vibration reduction and noise reduction device, thus ensuring its performance.
[0055] Furthermore, such as Figure 3As shown, a slot is provided on the end face of the damping structure 10 facing the mass structure 20, and the mass structure 20 is inserted into the slot. Specifically, in this embodiment, since the damping structures 11 located at both ends are connected to the connected pipeline through two end cap structures 30, the damping structure 10 and the mass structure 20 are connected by a plug-in connection, which can improve the convenience of connection, reduce costs, and facilitate the mutual displacement between the damping structure 10 and the mass structure 20, thereby improving the vibration reduction effect.
[0056] Furthermore, the damping structure 10 is a damping rubber ring, and the mass structure 20 is a metal mass unit. Specifically, in this embodiment, the damping rubber ring and the metal mass unit are interconnected to form an additional spring-mass resonant system, thereby achieving a vibration reduction effect.
[0057] Specifically, in this embodiment, the metal mass unit is made of aluminum alloy. Aluminum alloy has the advantages of being lightweight, high-strength, and corrosion-resistant, which can reduce the additional load on the connected pipelines and ensure the overall structural strength of the vibration reduction and noise reduction device, thus ensuring its performance. In addition, aluminum alloy has good processing performance, making it easy to process the micro-perforated array structure 21 on it, thereby ensuring the noise reduction effect.
[0058] Furthermore, the micro-perforated array structure 21 includes a plurality of uniformly arranged holes 211, and the micro-perforated array structure 21 satisfies the following formula:
[0059]
[0060] Where r is the relative acoustic impedance and m is the relative acoustic mass. f0 is the sound absorption center frequency, μ is the kinematic viscosity coefficient, c is the sound velocity, p is the perforation rate, t is the plate thickness of the metal mass unit, and d is the hole diameter. All the above parameters are in the International System of Units (SI).
[0061] Furthermore, the damping rubber ring and the metal mass element satisfy the following formula:
[0062]
[0063] M=ρπD2TL
[0064] Where F is the target resonant peak frequency, K is the equivalent stiffness, M is the equivalent mass, E is the Young's modulus of the damping rubber, D1 is the outer diameter of the pipe, B is the axial width of the damping rubber ring, H is the thickness of the damping rubber ring, ρ is the density of the metal mass element, D2 is the diameter of the metal mass element, T is the thickness of the metal mass element, and L is the axial length of the metal mass element. All the above parameters are in SI units.
[0065] Specifically, in this embodiment, the micro-perforated array structure 21, the damping rubber ring, and the metal mass unit satisfy the above calculation formulas, so that the vibration reduction and noise reduction device has a good vibration reduction and noise reduction effect.
[0066] Specifically, the vibration reduction and noise reduction device in this embodiment can change the sound absorption coefficient, absorption peak frequency, and sound absorption frequency band by altering the diameter of the holes 211 in the micro-perforated array structure 21, the spacing of the micro-perforated array, the thickness of the aluminum alloy mass unit, and the diameter of the rubber damping ring. This significantly improves the adjustability of the sound absorption coefficient and absorption peak frequency, making it easier to design the required absorption frequency band. By changing the axial length of the metal mass unit and the axial length of the damping rubber ring, the adjustability of suppressing the resonance peak frequency is improved.
[0067] Specifically, in this embodiment, the above formulas are all existing technologies and will not be described in detail here.
[0068] The vibration reduction and noise reduction device designed based on the above scheme can continue to increase the number of metal mass units and damping rubber rings without changing the internal dimensions, so as to form more additional spring mass resonance systems, thereby further increasing the number of resonance peaks suppressed by the device and further improving its performance.
[0069] Specifically, in this embodiment, the vibration damping and noise reduction device has different parameter values for different connected pipelines. For example... Figure 6 and Figure 7 As shown, the following description uses a section of the connected pipeline as an example.
[0070] First, it is necessary to determine the location of the resonance peak that needs to be suppressed in the connected pipeline. In this process, the target resonance peak that needs to be suppressed needs to be obtained through simulation software. As a preferred option, two target resonance peaks are selected as f1 = 200Hz and f2 = 300Hz.
[0071] Next, it is necessary to determine the noise frequency range that the connected pipeline needs to absorb. Preferably, the noise absorption frequency range is 230-400Hz, and the sound absorption center frequency f0 = 300Hz.
[0072] The parameter values of the vibration reduction and noise reduction device are calculated based on the above formula.
[0073] Finally, the vibration reduction and noise reduction device was installed on the connected pipeline section, and periodically arranged along the extension direction of the connected pipeline section. Simulation results were then obtained. Figures 6 to 7As shown, in terms of vibration reduction performance, two pairs of metal mass units and damping rubber rings form an additional spring-mass resonant system, which is periodically arranged on the connected pipeline, forming two local resonant band gaps at 200Hz and 300Hz respectively, which can effectively suppress the vibration of the connected pipeline and meet the expected design goals. In terms of sound absorption performance, the micro-perforated array on the aluminum alloy mass unit plays the role of micro-perforated sound absorption. In the range of 230-400Hz, the sound absorption coefficient is above 0.5, which meets the expected design goals.
[0074] This embodiment also provides a pipeline system, which includes a pipeline and the vibration damping and noise reduction devices described above, with a plurality of vibration damping and noise reduction devices arranged at intervals along the extension direction of the pipeline. By incorporating the aforementioned vibration damping and noise reduction devices, this pipeline system can effectively suppress pipeline vibration and reduce the noise generated by pipeline vibration, thereby improving the performance of the pipeline system.
[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A vibration reduction and noise reduction device, characterized in that, The vibration reduction and noise reduction device includes a damping structure (10) and a mass structure (20). Several damping structures (10) are arranged in parallel and at intervals. A mass structure (20) is arranged between any two damping structures (10). Each mass structure (20) is provided with a micro-perforated array structure (21). Each damping structure (10) is provided with a first receiving hole. Multiple first receiving holes are used to accommodate the connected pipeline.
2. The vibration reduction and noise reduction device according to claim 1, characterized in that, Each of the damping structures (10) includes two interlocking damping elements, and each of the mass structures (20) includes two interlocking mass units. Several damping elements on the same side are arranged in parallel and spaced apart, and a corresponding mass unit is provided between any two damping elements to form a vibration reduction and noise reduction component. Several damping elements on the other side are arranged in parallel and spaced apart, and a corresponding mass unit is provided between any two damping elements to form another vibration reduction and noise reduction component. The two vibration reduction and noise reduction components are interlocked to form the vibration reduction and noise reduction device.
3. The vibration reduction and noise reduction device according to claim 2, characterized in that, The damping structure (10) includes an end damping structure (11) and an internal damping structure (12). The two end damping structures (11) are arranged in parallel and spaced apart, and a plurality of internal damping structures (12) are arranged in parallel and spaced apart between the two end damping structures (11). The vibration reduction and noise reduction device also includes two end cap structures (30), and the two end cap structures (30) are detachably connected to the two end damping structures (11) in a one-to-one correspondence.
4. The vibration reduction and noise reduction device according to claim 3, characterized in that, The end cap structure (30) includes two end caps, which are interlocked and detachably connected to form the end cap structure (30); the end damping structure (11) includes two interlocked end damping members, each of which is provided with a mounting groove, and the two end caps of the end cap structure (30) are inserted into the two mounting grooves of the two end damping members in a one-to-one correspondence; the first fixing member (40) is used to detachably connect the end cap to the end damping member.
5. The vibration reduction and noise reduction device according to claim 4, characterized in that, Both ends of the end cap are provided with connecting plates (31). When the two end caps are fastened together, the two connecting plates (31) of one end cap and the two connecting plates (31) of the other end cap are detachably connected one-to-one by the second fixing member (50) so that the end cap structure (30) is connected to the connected pipeline.
6. The vibration reduction and noise reduction device according to claim 1, characterized in that, The damping structure (10) has a slot on its end face facing the mass structure (20), and the mass structure (20) is inserted into the slot.
7. The vibration reduction and noise reduction device according to claim 1, characterized in that, The damping structure (10) is a damping rubber ring, and the mass structure (20) is a metal mass unit.
8. The vibration reduction and noise reduction device according to claim 7, characterized in that, The micro-perforated array structure (21) includes a plurality of uniformly arranged holes, and the micro-perforated array structure (21) satisfies the following formula: Where r is the relative acoustic impedance and m is the relative acoustic mass. f0 is the sound absorption center frequency, μ is the kinematic viscosity coefficient, c is the sound velocity, p is the perforation rate, t is the plate thickness of the metal mass unit, and d is the hole diameter.
9. The vibration reduction and noise reduction device according to claim 7, characterized in that, The damping rubber ring and the metal mass unit satisfy the following formula: M=ρπD2TL Where F is the target resonance peak frequency, K is the equivalent stiffness, M is the equivalent mass, E is the Young's modulus of the damping rubber, D1 is the outer diameter of the pipe, B is the axial width of the damping rubber ring, H is the thickness of the damping rubber ring, ρ is the density of the metal mass element, D2 is the diameter of the metal mass element, T is the thickness of the metal mass element, and L is the axial length of the metal mass element.
10. A piping system, said piping system comprising pipes and a vibration reduction and noise reduction device as described in any one of claims 1-9, characterized in that, Several of the vibration reduction and noise reduction devices are arranged at intervals along the extension direction of the pipeline.