Ship pipeline particle damping vibration absorption system and method based on dynamic adjustment

Abstract

The invention discloses a ship pipeline particle damping vibration absorption system and method based on dynamic adjustment. The system comprises a pipeline clamp component and a dynamic vibration absorber. The dynamic vibration absorber comprises a main spring component connected with the pipeline clamp component, a particle damping assembly module connected with the main spring component and a mass balance weight module. The main spring component comprises a center spring and a spring rigidity adjusting module. The particle damping assembly module comprises a fan-shaped metal frame and a plurality of particle damping vibration attenuation units arranged on the fan-shaped metal frame; vibration energy is dissipated through collision and friction of metal particles in the particle damping vibration attenuation unit, the particle diameter and the filling rate are flexibly adjusted according to actual working conditions, and the vibration absorption frequency range is widened. The mass balance weight module comprises a plurality of detachable balance weight pieces which are arranged in a stacked mode. The vibration suppression device is compact in structure and can flexibly adapt to various working conditions, and efficient suppression of vibration at the characteristic frequency position of the pipeline is achieved by dynamically adjusting the spring rigidity, the particle damping parameters and the mass balance weight.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline vibration control, and more specifically, relates to a particle damping vibration absorption system and method for a ship pipeline based on dynamic adjustment. Background Technique

[0002] At present, the extreme working conditions that ships need to face have increased significantly. The dynamic loads under extreme working conditions have the characteristics of high amplitude, wide frequency band, and short action time, which are likely to cause severe vibration and shock responses of the pipeline system. As the core carrier for power transmission, energy supply, and life support, the anti-shock and vibration reduction performance of the pipeline system directly determines the stealth performance, structural integrity, and mission sustainability of the ship. Therefore, the research on vibration reduction of ship pipeline systems is of great significance.

[0003] However, traditional rigid supports or passive damping devices (such as spring vibration isolators, hydraulic dampers, etc.) have significant limitations and are difficult to meet the diverse needs of modern ships. Specifically, it is manifested in the following aspects: (1) The spring stiffness of traditional vibration dampers cannot be dynamically adjusted according to the actual working conditions, and it is difficult to adapt to the wide-frequency vibration requirements, especially the low-frequency effect is not ideal; (2) The damping characteristics of traditional dampers are fixed and cannot be flexibly matched with the pipeline vibration frequency, resulting in limited vibration reduction effect; (3) The mass counterweight of traditional devices is fixed and cannot be flexibly adjusted according to the actual working conditions, further limiting the vibration reduction effect; (4) Traditional vibration reduction devices such as spring vibration isolators and hydraulic dampers usually have large volume and weight, which are restricted by space in the ship pipeline system and are difficult to meet the lightweight requirements; (5) The installation and maintenance of traditional vibration reduction devices require professional technicians, and the maintenance difficulty is large in complex environments, increasing the use cost and maintenance difficulty; (23) Traditional vibration reduction devices are often standardized products and are difficult to be customized according to the special needs of the ship pipeline system, restricting their application in specific scenarios.

[0004] Therefore, there is an urgent need for a pipeline particle vibration absorption device with good vibration absorption effect, wide vibration absorption frequency range, high standardization degree, convenient adjustment, small space, and easy disassembly and replacement. Summary of the Invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a new type of pipeline particle vibration absorber, which has a wider vibration absorption frequency band than traditional dynamic vibration absorbers, and has a good vibration absorption effect in the low-frequency range (within 50Hz). Especially for low-frequency vibration absorption below 50Hz, this structure can not only ensure the stability of the vibration absorption system, but also ensure a good vibration absorption effect. Through structural innovation and parameter optimization, the present invention breaks through the bottleneck of traditional technology, realizes wide-band vibration reduction and efficient use of space, and can flexibly adapt to a variety of working conditions through adjustable stiffness design. This innovative technology provides key technical support for improving the safety and stealth of ships, and injects new security force into the reliability of ship operation in complex naval combat environments.

[0006] In order to achieve the above-mentioned object, one aspect of the present invention provides a particle damping vibration absorption system for ship pipelines based on dynamic adjustment, comprising a pipeline clamp component and a dynamic vibration absorber arranged on the pipeline clamp component; wherein, The pipeline clamp component adopts an upper and lower embracing structure; The dynamic vibration absorber comprises a main spring component connected to the pipe clamp component, a particle damping assembly module connected to the main spring component and a mass counterweight module; the main spring component comprises a spring base connected to the pipe clamp component, a center spring arranged on the spring base, and a spring stiffness adjustment module arranged on the center spring for adjusting the stiffness of the center spring; the stiffness of the center spring is changed by controlling the number of turns of the center spring involved in the movement, so that the natural frequency of the dynamic vibration absorber is close to the vibration frequency; the particle damping assembly module comprises a fan-shaped metal frame connected to the main spring component, a fan-shaped metal frame arranged on the fan-shaped metal frame, and a particle damping assembly module connected to the main spring component. Multiple independent particle damping vibration reduction units on the metal frame; the particle damping vibration reduction unit dissipates vibration energy through the collision and friction of internal metal particles, flexibly adjusts the particle diameter and filling rate according to actual working conditions, and widens the vibration absorption frequency range; the mass balance module is located on the top of the dynamic vibration absorber, including a plurality of superimposed detachable balance weight plates, and the overall mass of the dynamic vibration absorber is adjusted by increasing or decreasing the number of balance weight plates or replacing balance weight plates of different density materials, so that its natural frequency accurately matches the pipeline vibration frequency; through the dynamic adjustment of the spring stiffness, particle damping parameters and mass balance, efficient suppression of vibration at the characteristic frequency of the pipeline is achieved.

[0007] Furthermore, the pipeline clamp component includes an upper clamp and a lower clamp for clamping the pipeline; The upper clamp and the lower clamp are both arc-shaped structures adapted to the curvature of the pipeline surface; the upper clamp is provided with an arc-shaped clamp connecting plate consistent with the curvature of the upper clamp.

[0008] Further, the dynamic vibration absorber is rigidly connected to the pipe clamp member through a vertical limiter. The vertical limiter is respectively arranged between the two sides of the spring stiffness adjustment module and the arc-shaped clamp connecting plate; The vertical limiter is a strip-shaped structure and an oval retaining groove arranged on the longitudinal central axis of the strip-shaped structure.

[0009] Further, the bottom of the spring base is connected to the middle part of the top of the arc-shaped clamp connecting plate; Further, the spring stiffness adjustment module includes two relatively arranged arc-shaped spring clamps; The inner part of the arc-shaped spring clamp is provided with an internal thread adapted to the central spring, and the outer surface is provided with an adjusting bolt; The adjusting bolt passes through the retaining groove and is fixed to the arc-shaped spring clamp.

[0010] Further, the radian of the upper and lower surfaces of the sector-shaped metal frame is consistent with the outer diameter of the pipeline; The upper and lower surfaces of the sector-shaped metal frame are provided with a shock absorber damping layer with a high loss factor.

[0011] Further, the sector-shaped metal frame is divided into a plurality of independent chambers by a dividing plate; The main spring member is arranged in the middle independent chamber of the sector-shaped metal frame; Both ends of the central spring are connected to the upper and lower end surfaces of the middle independent chamber; The particle damping vibration reduction units are respectively arranged in the independent chambers on both sides of the main spring member.

[0012] Further, the particle damping vibration reduction unit includes a cylindrical metal shell and spring connection structures respectively arranged between the two ends of the cylindrical metal shell and the upper and lower inner surfaces of the sector-shaped metal frame.

[0013] Further, a number of metal particles are filled in the cylindrical metal shell; The diameter range of the metal particles is 1-6 mm; The filling rate of the metal particles is adjusted between 70% and 90% according to the working conditions, and particles of different diameters can be mixed.

[0014] The second aspect of the present invention provides a method for particle damping vibration absorption of a ship pipeline based on dynamic adjustment, which is realized by applying the particle damping vibration absorption system for a ship pipeline based on dynamic adjustment, and includes the following steps: S1: Install the pipe clamp member on the pipeline through an upper and lower surrounding structure; S2: Select appropriate metal particles according to the target vibration damping frequency band and determine the filling rate; inject the metal particles into the cylindrical metal shell and seal the shell; vertically install the assembled particle damping vibration damping unit into the independent chamber of the fan-shaped metal frame through the spring connection structure; S3: Install the fan-shaped metal frame with a vibration damper damping layer with a high loss factor above the pipe clamp component, ensuring that the upper and lower surface arcs are consistent with the outer diameter of the pipe; S4: Install the main spring component in the middle independent chamber of the fan-shaped metal frame, connect the two ends of the central spring to the upper and lower end surfaces of the middle independent chamber respectively, and connect the bottom of the spring base to the middle part of the top of the arc-shaped clamp connecting plate; S5: Install the mass counterweight module on the top of the dynamic vibration absorber, adjust the overall mass of the vibration absorber by increasing or decreasing the number of counterweight plates or replacing counterweight plates with different density materials, so that the natural frequency of the dynamic vibration absorber accurately matches the pipeline vibration frequency; S6: Rigidly connect the dynamic vibration absorber to the pipe clamp component through the vertical limiter; S7: Loosen the adjustment bolt of the spring stiffness adjustment module, rotate the central spring, and change its stiffness value by controlling the number of turns of the central spring participating in the movement to ensure that the stiffness value meets the target vibration frequency; S8: When the pipeline vibrates under external excitation, the dynamic vibration absorber absorbs vibration energy through the elastic deformation of the main spring component, dissipates energy through the collision and friction of the metal particles in the particle damping vibration damping unit, and cooperates with the vibration damper damping layer to further suppress high-frequency vibration; by adjusting the spring stiffness, particle parameters and mass counterweight module, the vibration absorber realizes low-frequency vibration damping in a wide frequency band.

[0015] Generally speaking, compared with the prior art through the above technical solutions conceived by the present invention, the following beneficial effects can be achieved: (1) The ship pipeline particle damping vibration absorption system and method based on dynamic adjustment of the present invention aim at the problem that common passive pipeline dynamic vibration absorbers cannot adjust the spring stiffness or the damping value. By setting a spring stiffness adjustment module to control the number of turns of the central spring participating in the movement, the stiffness of the central spring is changed, so that the natural frequency of the dynamic vibration absorber is close to the pipeline vibration characteristic frequency to be controlled, and the vibration absorption effect is improved; the particle damping assembly module is connected to the dynamic vibration absorber, and it contains multiple particle damping vibration reduction units inside, which can not only adjust the vibration absorption frequency of the dynamic vibration absorber, but also increase the damping of the system to further improve the vibration reduction effect; the particle damping vibration reduction unit is a modular component with adjustable number. The unit is connected to the damping assembly module through a spring and filled with metal particles inside; by adjusting the number of the particle damping vibration reduction units or replacing the particles with different density or particle size combinations inside, the vibration energy is dissipated through the collision and friction of the metal particles, and then the vibration absorption frequency of the dynamic vibration absorber is adjusted to improve the vibration reduction effect of the vibration absorption system; according to the actual working conditions, the particle diameter and filling rate are flexibly adjusted to broaden the vibration absorption frequency range, and the problem of limited vibration absorption frequency range in the prior art can be effectively solved; the mass counterweight module is located at the top of the dynamic vibration absorber and is used to balance the mass of the dynamic vibration absorber to maintain the required natural frequency; by increasing or decreasing the number of counterweight plates or replacing the counterweight plates with different density materials, the overall mass of the dynamic vibration absorber is adjusted so that its natural frequency precisely matches the pipeline vibration frequency; the pipeline particle damping vibration absorber of the present invention can not only maximize the vibration absorption effect at the characteristic frequency, but also appropriately broaden the vibration absorption effect near the characteristic frequency range, and has multiple advantages such as compact structure, good vibration absorption effect, wide vibration absorption frequency range, high standardization degree, convenient adjustment, small space, easy disassembly and replacement, etc., and is suitable for the vibration control of the ship pipeline system.

[0016] (2) The ship pipeline particle damping vibration absorption system and method based on dynamic adjustment of the present invention uses an upper and lower surrounding type pipeline clamp component to tightly connect the dynamic vibration absorber with the pipeline; the vertical limiter is used to limit the lateral offset of the vibration absorber. When the dynamic vibration absorber moves during the vibration process, the vertical limiter ensures that the vibration absorber only moves up and down in the vertical direction, preventing lateral offset, so as to ensure the stability of the vibration reduction effect; through the dynamic adjustment of the spring stiffness, particle damping parameters and mass counterweight, the system can effectively suppress the pipeline vibration in a relatively wide frequency band; the overall design of the present invention occupies a small space and is particularly suitable for environments with limited space such as ships, and can overcome the limitations of complex structure and large occupied space in the prior art.

[0017] (3) For the ship pipeline particle damping vibration absorption system and method based on dynamic adjustment of the present invention, the radian of the upper and lower surfaces of the sector-shaped metal frame of the particle damping assembly module is consistent with the outer diameter of the pipeline; by laying a vibration damping layer with a high loss factor on the surface, the high-frequency vibration of the sector-shaped metal frame is suppressed; the vibration transmission of the contact surface is reduced; when the structural member vibrates, the deformation of the damping layer (such as tensile deformation, shear deformation, etc.) will consume the vibration energy, thereby suppressing the propagation of vibration and reducing the influence of vibration on other components or structures.

[0018] (3) For the ship pipeline particle damping vibration absorption system and method based on dynamic adjustment of the present invention, the sector-shaped metal frame is divided into multiple independent chambers by a partition plate, and the main spring member is arranged in the middle independent chamber of the sector-shaped metal frame; both ends of the central spring are connected to the upper and lower surface of the middle independent chamber; the particle damping vibration reduction units are respectively arranged in each independent chamber on both sides of the main spring member; through modular design, the number and damping characteristics of the particle damping vibration reduction units can be flexibly adjusted, enhancing the scalability and versatility of the system, and solving the problem of poor system adaptability in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a ship pipeline particle damping vibration absorption system based on dynamic adjustment according to an embodiment of the present invention; Figure 2 It is an enlarged schematic structural diagram of a vertical limiter of a ship pipeline particle damping vibration absorption system based on dynamic adjustment according to an embodiment of the present invention; Figure 3 It is an enlarged schematic structural diagram of a spring stiffness adjustment module of a ship pipeline particle damping vibration absorption system based on dynamic adjustment according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the trend of vibration level changing with frequency of a ship pipeline particle damping vibration absorption system based on dynamic adjustment according to an embodiment of the present invention under different conditions; Figure 5 It is a schematic flow diagram of a ship pipeline particle damping vibration absorption method based on dynamic adjustment according to an embodiment of the present invention.

[0020] In all the drawings, the same reference numerals denote the same technical features, specifically: 1 - pipe clamp member, 11 - upper clamp, 12 - lower clamp, 13 - arc-shaped clamp connecting plate, 14 - vertical limiter, 141 - oblong retaining groove, 2 - dynamic vibration absorber, 21 - main spring member, 211 - spring base, 212 - central spring, 213 - spring stiffness adjustment module, 2131 - arc-shaped spring fixture, 2132 - adjusting bolt, 22 - particle damping assembly module, 221 - sector-shaped metal frame, 222 - particle damping vibration reduction unit, 2221 - cylindrical metal shell, 2222 - spring connection structure, 223 - shock absorber damping layer, 224 - partition plate, 23 - mass counterweight module. Detailed implementation manners

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, when an element is referred to as "fixed on", "arranged on" or "provided on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element; the terms "installed", "connected", "connected" and "provided" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] As Figures 1 - 3As shown in the figure, one aspect of the present invention provides a ship pipeline particle damping vibration absorption system based on dynamic adjustment, which includes a pipeline clamp member 1 and a dynamic vibration absorber 2 provided on the pipeline clamp member 1; the pipeline clamp member 1 adopts an upper and lower surrounding structure; the dynamic vibration absorber 2 includes a main spring member 21 connected to the pipeline clamp member 1, a particle damping assembly module 22 connected to the main spring member 21, and a mass counterweight module 23; the main spring member 21 includes a spring base 211 connected to the pipeline clamp member 1, a central spring 212 provided on the spring base 211, and a spring stiffness adjustment module 213 provided on the central spring 212 for adjusting the stiffness of the central spring 212; by controlling the number of turns of the central spring 212 participating in the movement, the stiffness of the central spring 212 is changed, so that the natural frequency of the dynamic vibration absorber 2 is close to the pipeline vibration frequency, and the vibration absorption effect is improved; the particle damping assembly module 22 includes a fan-shaped metal frame 221 connected to the main spring member 21 and a plurality of independent particle damping vibration reduction units 222 provided on the fan-shaped metal frame 221; the entire particle damping assembly module 22 can provide different damping for the dynamic vibration absorber 2 to improve the vibration reduction effect; the particle damping vibration reduction unit 222 dissipates vibration energy through the collision and friction of internal metal particles, and flexibly adjusts the particle diameter and filling rate according to the actual working conditions to broaden the vibration absorption frequency range; the mass counterweight module 23 is located at the top of the dynamic vibration absorber and is used to balance the mass of the dynamic vibration absorber to maintain the required natural frequency. The mass counterweight module 23 includes a number of detachable counterweight sheets stacked together, and the overall mass of the dynamic vibration absorber 2 is adjusted by increasing or decreasing the number of counterweight sheets or replacing counterweight sheets made of different density materials (such as lead, steel), so that its natural frequency accurately matches the pipeline vibration frequency; the present invention realizes the efficient suppression of vibration at the characteristic frequency of the pipeline through the dynamic adjustment of spring stiffness, particle damping parameters and mass counterweight; the adjustable particle damping vibration reduction unit significantly broadens the vibration absorption frequency range (the effective vibration absorption frequency of the traditional vibration absorber is 1-2Hz, and after being broadened by the present invention, the vibration absorption frequency can reach 4Hz); the overall design of the present invention is compact, occupies little space, and is suitable for environments with limited space such as ships; through modular design and standardized components, it is convenient for disassembly, replacement and maintenance.

[0024] Further, as Figures 1 - 3 shown, the pipeline clamp member 1 includes an upper clamp 11 and a lower clamp 12 for clamping the pipeline. The upper clamp 11 and the lower clamp 12 are fastened to the pipeline by bolts to ensure close fit with the outer wall of the pipeline. The structure is simple and the installation and disassembly are convenient; both the upper clamp 11 and the lower clamp 12 are arc-shaped structures adapted to the surface curvature of the pipeline; an arc-shaped clamp connecting plate 13 having the same curvature as the upper clamp 11 is provided on the upper clamp 11 for connecting the dynamic vibration absorber 2.

[0025] Further, as Figures 1 - 3As shown, the dynamic vibration absorber 2 is rigidly connected to the pipe clamp member 1 through the vertical limiter 14, which can ensure that the dynamic vibration absorber 2 moves only in the vertical direction of the pipe, avoiding lateral offset interference. The vertical limiter 14 is respectively arranged between the arc-shaped clamp connecting plates 13 on both sides of the spring stiffness adjustment module 213. The vertical limiter 14 is of a strip structure and is provided with an oval retaining groove 141 on the longitudinal central axis of the strip structure. The vertical limiter 14 restricts the dynamic vibration absorber 2 to move only in the vertical direction of the pipe, avoiding lateral offset interference.

[0026] Furthermore, as Figures 1 - 3 shown, the bottom of the spring base 211 is connected to the middle of the top of the arc-shaped clamp connecting plate 13. The spring stiffness adjustment module 213 includes two arc-shaped spring clamps 2131 arranged oppositely. The inside of the arc-shaped spring clamp 2131 is provided with an internal thread adapted to the central spring 212, and the outer surface is provided with an adjustment bolt 2132. The adjustment bolt 2132 passes through the retaining groove 141 and is fixed to the arc-shaped spring clamp 2131. When the stiffness needs to be adjusted, loosen the adjustment bolt 2132 on the arc-shaped spring clamp 2131 and rotate the central spring 212. By controlling the number of turns of the central spring 212 participating in the movement, the stiffness of the central spring 212 is changed, that is, the effective working number of turns is changed to adjust the stiffness value, so that the natural frequency of the dynamic vibration absorber is close to the vibration frequency to improve its vibration absorption effect. After the adjustment is completed, tighten the adjustment bolt 2132. Specifically, loosen the adjustment bolt 2132 on the arc-shaped spring clamp 2131. By rotating the central spring 212, the winding mode of the central spring 212 in the support structure can be changed, so as to adjust the effective working number of turns participating in the movement. When the central spring 212 is rotated clockwise and one end of it winds inward, the effective working number of turns can be reduced and the stiffness of the spring is increased. When the central spring 212 is rotated counterclockwise and one end of it unfolds outward, the effective working number of turns can be increased and the stiffness of the spring is reduced. After adjusting to the required stiffness, tighten the adjustment bolt 2132 to fix the arc-shaped spring clamp 2131 in a new position to ensure that the central spring 212 maintains the adjusted state. In this way, the stiffness of the spring can be flexibly adjusted to meet different vibration frequency requirements.

[0027] Furthermore, as Figures 1 - 3As shown, the radian of the upper and lower surfaces of the sector-shaped metal frame 221 is consistent with the outer diameter of the pipeline and can be precisely matched; damping layers 223 of shock absorbers with high loss factors are laid on the upper and lower surfaces of the sector-shaped metal frame 221 to suppress the high-frequency vibration of the sector-shaped metal frame 221; the vibration transmission of the contact surface can be reduced through the damping layers 223 of shock absorbers; when the pipeline is vibrated by external excitation, the pipeline clamp member 1 transmits the vibration to the dynamic vibration absorber 2, and at the same time, the amplitude of the vibration transmitted to the outer wall of the pipeline is reduced through the damping layers 223 of shock absorbers provided on the dynamic vibration absorber 2.

[0028] Further, as Figures 1 - 3 shown, the sector-shaped metal frame 221 is divided into a plurality of independent chambers by partition plates 224, and the main spring member 21 is arranged in the middle independent chamber of the sector-shaped metal frame 221; both ends of the central spring 212 are connected to the upper and lower end surfaces of the middle independent chamber; the particle damping shock absorption units 222 are respectively arranged in the independent chambers on both sides of the main spring member 21; the number and damping characteristics of the particle damping shock absorption units 222 can be flexibly adjusted through modular design; in the present invention, the sector-shaped metal frame 221 is divided into a plurality of independent chambers by partition plates 224, and the particle damping shock absorption units in each chamber can work independently, enhancing the shock absorption capacity of the system; the design of the independent chambers enables the particle damping shock absorption units to more effectively dissipate vibration energy, improving the overall shock absorption effect. The main spring member is arranged in the middle independent chamber and works together with the particle damping shock absorption units. The elastic deformation of the main spring and the collision and friction of the particle damping dissipate energy, further improving the shock absorption effect of the system. The design of the independent chambers enables the particle damping shock absorption units to be flexibly arranged at different positions of the sector-shaped metal frame, enhancing the adaptability of the system. This design is not only convenient for installation and maintenance, but also can adjust the number and position of the particle damping shock absorption units according to actual needs. Through modular design, the system can flexibly adjust the number and parameters of the particle damping shock absorption units according to different pipeline vibration conditions, enhancing the scalability and versatility of the system, and solving the problem of poor adaptability of the existing system.

[0029] Further, as Figures 1 - 3 shown, the particle damping shock absorption unit 222 includes a cylindrical metal shell 2221 and spring connection structures 2222 respectively arranged between the two ends of the cylindrical metal shell 2221 and the upper and lower inner surfaces of the sector-shaped metal frame 221. The cylindrical metal shell 2221 is fixed in the chamber of the sector-shaped metal frame 221 through the spring connection structures 2222; a number of metal particles are filled inside the cylindrical metal shell 2221; the diameter range of the metal particles is 1-6 mm, and the filling rate of the metal particles is adjusted between 70% and 90% according to the working conditions; by replacing particles with different density or particle size combinations, the broadband damping characteristic requirements can be adapted.

[0030] Furthermore, the collision and friction of metal particles are nonlinear processes that can effectively dissipate high-frequency vibration energy and exhibit significant vibration damping effects especially during high-frequency vibrations. The collision and friction characteristics of metal particles have a nonlinear response that enables the particle damping vibration reduction unit to exhibit different damping characteristics at different amplitudes, allowing it to adapt to complex vibration environments, especially showing good vibration damping effects under multi-frequency excitation and random vibration conditions. By adjusting the diameter and filling rate of the metal particles, the damping characteristics of the particle damping vibration reduction unit can be changed. Smaller particle diameters and higher filling rates usually increase the collision and friction frequency between particles, thereby improving the damping effect; metal particles of different materials have different densities and friction coefficients, and appropriate particle materials can be selected according to the actual working conditions to optimize the damping performance. By adjusting the parameters of the particles (such as diameter, filling rate, material, etc.), the vibration absorption frequency range can be broadened, enabling the shock absorber to cover more vibration frequencies; by reasonably selecting particle parameters, the natural frequency of the particle damping vibration reduction unit can be adjusted to match the vibration characteristic frequency of the pipeline, thereby enhancing the vibration damping effect.

[0031] In the ship pipeline particle damping vibration absorption system based on dynamic adjustment provided by the present invention, when vibration is transmitted to the dynamic vibration absorber 2, the central spring 212 of the main spring member 21 undergoes elastic deformation to absorb vibration energy. The spring stiffness adjustment module makes the natural frequency of the dynamic vibration absorber accurately match the pipeline vibration characteristic frequency by controlling the number of central spring coils participating in the movement, thereby enhancing the vibration absorption effect; the particle damping vibration reduction unit 222 in the particle damping assembly module 22 further dissipates energy through the collision and friction of metal particles. The particle diameter and filling rate can be flexibly adjusted according to the actual working conditions to broaden the vibration absorption frequency range. The mass counterweight module 23 dynamically adjusts the overall mass of the vibration absorber by adding or removing counterweight plates or replacing materials, making the natural frequency of the vibration absorber match the pipeline vibration frequency, thereby enhancing the vibration damping effect; the particle damping vibration reduction unit is an independent module, and its quantity and parameters can be flexibly adjusted according to requirements, which can improve the standardization degree and versatility of the system; the overall design is compact, occupying little space, and is suitable for environments with limited space such as ships; the modular design and standardized components facilitate disassembly, replacement, and maintenance.

[0032] Furthermore, Figure 4This is the trend of the vibration level (unit: dB) of the ship pipeline particle damping vibration absorption system based on dynamic adjustment of the present invention changing with frequency (unit: Hz) under different conditions; the dots in the figure represent the change trend of the pipeline vibration level when the damping vibration absorption system of the present invention is not used; the squares represent the change trend of the pipeline vibration level in the configuration state of the damping vibration absorption system of the present invention; the diamonds represent the change trend of the pipeline vibration level in the configuration state of the damping vibration absorption system of the present invention and when using 0.5 mm particles; the regular triangles represent the change trend of the pipeline vibration level in the configuration state of the damping vibration absorption system of the present invention and when using 2 mm particles; the inverted triangles represent the change trend of the pipeline vibration level in the configuration state of the damping vibration absorption system of the present invention and when using 4 mm particles; from Figure 4 It can be seen that the vibration level in the original state changes relatively smoothly within the frequency range, but the overall vibration level is relatively high; the vibration level in the configured state is slightly lower than that in the original state, indicating that the configured state may already have a certain vibration reduction effect; when using 0.5 mm particles, the vibration reduction effect is average between frequencies of 10 and 14. When using 2 mm and 4 mm particles, the vibration reduction effect is good between frequencies of 10 and 14. According to the above analysis, it can be known that using the ship pipeline particle damping vibration absorption system based on dynamic adjustment of the present invention can effectively reduce the pipeline vibration level, especially the damping vibration absorbers with 2 - 4 mm particles show good vibration reduction effects at 10 - 14 Hz.

[0033] As Figure 5 shown, the second aspect of the present invention provides a ship pipeline particle damping vibration absorption method based on dynamic adjustment, including the following steps: S1: Install the pipeline clamp member 1, and install the pipeline clamp member 1 on the pipeline through an upper and lower surrounding structure; Specifically, fasten the upper clamp 11 and the lower clamp 12 on the pipeline through bolts to ensure that the inner wall of the clamp is closely attached to the outer wall of the pipeline; check whether the arc structures of the upper clamp 11 and the lower clamp 12 are adapted to the surface curvature of the pipeline to ensure the stability of the connection; S2: Assemble the particle damping vibration reduction unit 222, select appropriate metal particles according to the target vibration reduction frequency band, and determine the filling rate; inject the metal particles into the cylindrical metal shell 2221 and seal the shell; vertically install the assembled particle damping vibration reduction unit 222 into the independent chamber of the fan-shaped metal frame 221 through the spring connection structure 2222; S3: Install the fan-shaped metal frame 221, install the fan-shaped metal frame 221 above the pipeline clamp member 1 to ensure that the upper and lower surface curvatures are consistent with the outer diameter of the pipeline; check whether the upper and lower surfaces of the fan-shaped metal frame 221 are provided with a vibration absorber damping layer 223 with a high loss factor to suppress high-frequency vibrations; S4: Install the main spring component. Install the main spring component 21 in the middle independent chamber of the sector metal frame 221. Connect the two ends of the central spring 212 to the upper and lower surface of the middle independent chamber respectively, and connect the bottom of the spring base 211 to the middle part of the top of the arc-shaped clamp connecting plate 13. S5: Install the mass counterweight module 23. Install the mass counterweight module 23 on the top of the dynamic vibration absorber 2. Adjust the overall mass of the vibration absorber by increasing or decreasing the number of counterweight plates or replacing counterweight plates made of different density materials (such as lead, steel); ensure that the adjustment of the mass counterweight module 23 makes the natural frequency of the dynamic vibration absorber 2 accurately match the pipeline vibration frequency. S6: Connect the dynamic vibration absorber 2 and the pipeline clamp component 1. Rigidly connect the dynamic vibration absorber 2 and the pipeline clamp component 1 through the vertical limiter 14; ensure that the vertical limiter 14 restricts the dynamic vibration absorber 2 to move only in the vertical direction of the pipeline to avoid lateral offset interference; check whether the long strip structure and the long circular retaining groove 141 of the vertical limiter 14 are correctly installed, and ensure that the adjusting bolt 2132 passes through the retaining groove 141 and is fixed to the arc-shaped spring clamp 2131. S7: Adjust the spring stiffness. Loosen the adjusting bolt 2132 of the spring stiffness adjustment module 213, rotate the central spring 212, and change its stiffness value by controlling the number of turns of the central spring 212 participating in the movement. After adjustment, tighten the adjusting bolt 2132 to ensure that the stiffness value meets the target vibration frequency. S8: Debugging and operation. When the pipeline is vibrated by external excitation, the dynamic vibration absorber 2 absorbs the vibration energy through the elastic deformation of the main spring component 21. The metal particles in the particle damping vibration reduction unit 222 dissipate energy due to collision and friction, and cooperate with the vibration absorber damping layer 223 to further suppress high-frequency vibration; by adjusting the spring stiffness, particle parameters and the mass counterweight module 23, the vibration absorber realizes low-frequency vibration reduction in a wide frequency band.

[0034] The method for damping vibration of ship pipelines based on dynamic adjustment dynamically adjusts the stiffness of the central spring through a spring stiffness adjustment module, enabling the natural frequency of the dynamic vibration absorber to precisely match the pipeline vibration frequency, significantly improving the vibration absorption effect. At the same time, the particle damping vibration reduction unit is an independent module, and its quantity and parameters can be flexibly adjusted according to requirements. The metal particles inside the particle damping vibration reduction unit dissipate vibration energy through collision and friction, adjust the damping characteristics, broaden the vibration absorption frequency range, and optimize the dynamic performance of the vibration absorber, effectively solving the problem of limited vibration absorption frequency range in the prior art. Its non-linear characteristics and adaptability enable it to effectively cope with complex vibration environments and significantly improve the vibration reduction effect. The mass counterweight module realizes dynamic adjustment of the mass by adding or removing counterweight sheets or replacing materials, ensuring the adaptability and versatility of the system. The present invention effectively suppresses pipeline vibration by reasonably installing and adjusting pipeline clamp components, particle damping vibration reduction units, and dynamic vibration absorbers. Through adjustable stiffness and damping, a set of standardized equipment is used to adapt to different ship pipelines and working conditions, reducing the costs of equipment design, production, and maintenance. The present invention is easy to operate and highly adaptable, capable of meeting the vibration reduction requirements of ship pipelines under different working conditions. Through standardized components and modular design, the system is convenient for disassembly, replacement, and maintenance, significantly reducing the maintenance costs and complexity, and ensuring the long-term stability and reliability of the system, solving the problem of difficult maintenance in the prior art.

[0035] It is easy for those skilled in the art to understand that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ship pipeline particle damping vibration absorption system based on dynamic adjustment, characterized in that: It includes a pipe clamp member (1) and a dynamic vibration absorber (2) provided on the pipe clamp member (1); wherein, The pipe clamp member (1) adopts an upper and lower surrounding structure; The dynamic vibration absorber (2) includes a main spring member (21) connected to the pipe clamp member (1), a particle damping assembly module (22) and a mass counterweight module (23) connected to the main spring member (21); the main spring member (21) includes a spring base (211) connected to the pipe clamp member (1), a central spring (212) provided on the spring base (211), and a spring stiffness adjustment module (213) provided on the central spring (212) for adjusting the stiffness of the central spring (212); by controlling the number of turns of the central spring (212) participating in the movement, the stiffness of the central spring (212) is changed so that the natural frequency of the dynamic vibration absorber (2) approaches the vibration frequency; the particle damping assembly module (22) includes a sector-shaped metal frame (221) connected to the main spring member (21), and a plurality of independent particle damping vibration reduction units (222) provided on the sector-shaped metal frame (221); the particle damping vibration reduction units (222) dissipate vibration energy through the collision and friction of internal metal particles, and flexibly adjust the particle diameter and filling rate according to the actual working conditions to broaden the vibration absorption frequency range; the mass counterweight module (23) is located at the top of the dynamic vibration absorber (2) and includes a plurality of detachable counterweight sheets stacked, and the overall mass of the dynamic vibration absorber (2) is adjusted by increasing or decreasing the number of counterweight sheets or replacing counterweight sheets of different density materials so that its natural frequency precisely matches the pipeline vibration frequency; through the dynamic adjustment of the spring stiffness, particle damping parameters and mass counterweight, the efficient suppression of vibration at the characteristic frequency of the pipeline is realized.

2. The particle damping vibration absorption system for ship pipelines based on dynamic adjustment according to claim 1, wherein: The pipe clamp member (1) includes an upper clamp (11) and a lower clamp (12) for clamping the pipe; Both the upper clamp (11) and the lower clamp (12) are arc-shaped structures adapted to the surface curvature of the pipe; an arc-shaped clamp connecting plate (13) consistent with the arc of the upper clamp (11) is provided on the upper clamp (11).

3. The particle damping vibration absorption system for ship pipelines based on dynamic adjustment according to claim 2, characterized in that: The dynamic vibration absorber (2) is rigidly connected to the pipe clamp member (1) through a vertical limiter (14); The vertical limiter (14) is respectively arranged between the arc-shaped clamp connecting plate (13) on both sides of the spring stiffness adjustment module (213); The vertical limiter (14) is a long strip-shaped structure and an oblong retaining groove (141) provided on the longitudinal central axis of the long strip-shaped structure.

4. The particle damping vibration absorption system for ship pipelines based on dynamic adjustment according to claim 3, characterized in that: The bottom of the spring base (211) is connected to the middle of the top of the arc-shaped clamp connecting plate (13).

5. The particle damping vibration absorption system for ship pipelines based on dynamic adjustment according to claim 4, characterized in that: The spring stiffness adjustment module (213) includes two relatively arranged arc-shaped spring clamps (2131); The inside of the arc-shaped spring clamp (2131) is provided with an internal thread adapted to the central spring (212), and an adjusting bolt (2132) is provided on the outer surface; The adjusting bolt (2132) passes through the retaining groove (141) and is fixed to the arc-shaped spring clamp (2131).

6. A ship pipeline particle damping vibration absorption system based on dynamic adjustment according to any one of claims 1-4, characterized in that: The radian of the upper and lower surfaces of the sector-shaped metal frame (221) is consistent with the outer diameter of the pipeline; The upper and lower surfaces of the sector-shaped metal frame (221) are provided with a shock absorber damping layer (223) with a high loss factor.

7. A ship pipeline particle damping vibration absorption system based on dynamic adjustment according to any one of claims 1-4, characterized in that: The sector-shaped metal frame (221) is divided into multiple independent chambers by a partition plate (224); The main spring member (21) is arranged in the middle independent chamber of the sector-shaped metal frame (221); Both ends of the central spring (212) are connected to the upper and lower end surfaces of the middle independent chamber; The particle damping vibration reduction units (222) are respectively arranged in each independent chamber on both sides of the main spring member (21).

8. A ship pipeline particle damping vibration absorption system based on dynamic adjustment according to any one of claims 1-4, characterized in that: The particle damping vibration reduction unit (222) includes a cylindrical metal shell (2221) and a spring connection structure (2222) respectively arranged between the two ends of the cylindrical metal shell (2221) and the upper and lower inner surfaces of the sector-shaped metal frame (221).

9. A ship pipeline particle damping vibration absorption system based on dynamic adjustment according to claim 8, characterized in that: A number of metal particles are filled inside the cylindrical metal shell (2221); The diameter range of the metal particles is 1-6 mm; The filling rate of the metal particles is adjusted between 70% and 90% according to the working conditions, and particles of different diameters can be mixed.

10. A method for damping vibration of ship pipelines based on dynamic adjustment, characterized in that, It is realized by applying the ship pipeline particle damping vibration absorber system based on dynamic adjustment as described in any one of claims 1-9, including the following steps: S1: Install the pipeline clamp member (1) on the pipeline through an upper and lower surrounding structure; S2: Select appropriate metal particles according to the target vibration reduction frequency band and determine the filling rate; inject the metal particles into the cylindrical metal shell (2221) and seal the shell; vertically install the assembled particle damping vibration reduction unit (222) into the independent chamber of the sector-shaped metal frame (221) through the spring connection structure (2222). S3: Install the sector-shaped metal frame (221) provided with the shock absorber damping layer (223) with a high loss factor above the pipeline clamp member (1), and ensure that the radian of its upper and lower surfaces is consistent with the outer diameter of the pipeline; S4: Install the main spring member (21) in the middle independent chamber of the sector-shaped metal frame (221), connect both ends of the central spring (212) to the upper and lower end surfaces of the middle independent chamber respectively, and connect the bottom of the spring base (211) to the middle part of the top of the arc-shaped clamp connecting plate (13); S5: Install the mass counterweight module (23) on the top of the dynamic vibration absorber (2), and adjust the overall mass of the vibration absorber by increasing or decreasing the number of counterweight plates or replacing counterweight plates of different density materials, so that the natural frequency of the dynamic vibration absorber (2) accurately matches the pipeline vibration frequency; S6: Rigidly connect the dynamic vibration absorber (2) and the pipeline clamp member (1) through a vertical limiter (14); S7: Loosen the adjusting bolt (2132) of the spring stiffness adjustment module (213), rotate the central spring (212), and change its stiffness value by controlling the number of turns of the central spring (212) participating in the movement to ensure that the stiffness value meets the target vibration frequency; S8: When the pipeline vibrates under external excitation, the dynamic vibration absorber (2) absorbs the vibration energy through the elastic deformation of the main spring member (21), dissipates the energy through the collision and friction of the metal particles in the particle damping vibration reduction unit (222), and further suppresses high-frequency vibration in cooperation with the shock absorber damping layer (223); by adjusting the spring stiffness, particle parameters and the mass counterweight module (23), the vibration absorber realizes low-frequency vibration reduction in a wide frequency band.

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