Granular damper and design method of granular damper

Abstract

The application discloses a kind of granular damper and the design method of granular damper, belong to the technical field of damping and damping, to solve the problem of poor damping effect caused by the self-regulating ability of existing granular damper, the granular damper includes shell, the shell contains upper and lower connecting cover plate (6) and shell (1), shell (1) contains main cavity (101) and sub-cavity (102), first damping particles are contained in main cavity (101), the first damping particles are the mixture of hard damping particles and semi-hard damping particles.The shell of the granular damper is filled with the mixture of hard damping particles and semi-hard damping particles, the synergistic effect of hard damping particles and semi-hard damping particles can automatically adjust the particle collision behavior according to the change of vibration environment, and has higher energy dissipation capacity under the same conditions.

Description

Technical Field

[0001] This invention relates to the field of vibration damping technology, specifically to a particle damper and a design method for a particle damper. Background Technology

[0002] Mechanical equipment typically generates severe vibrations during operation. These vibration loads are extremely unbalanced, and there is a vibration amplification effect between components, leading to problems such as reduced working accuracy, accelerated fatigue of the main structure, and structural fracture. Therefore, vibration damping devices are generally required to be installed on the equipment.

[0003] Particle damping vibration reduction technology has the advantages of small added mass, high durability, and low cost, and has been widely used in vibration reduction of mechanical equipment. For example, Chinese patent CN 112031196 A, published on December 4, 2020, discloses a "Combinable Particle Damper". This damper can be flexibly assembled according to the installation space to achieve flexible application in various scenarios. At the same time, the damper can use a variety of fillers as vibration reduction materials to achieve a wide frequency vibration reduction effect. However, the connection structure has low reliability. To achieve the optimal vibration effect under different vibration environment conditions, it is necessary to frequently change the device configuration and particle filling amount. It lacks a certain self-adjustment capability. When the particles move, the interaction with the container wall can only generate a small amount of energy dissipation, which cannot fully utilize the energy dissipation of the collision between the particles and the container. Moreover, the particles produce a single vibration reduction effect, which is limited to a single purpose. Summary of the Invention

[0004] To address the problem of poor vibration reduction performance caused by the lack of self-adjustment capability in existing particle dampers, this invention provides a particle damper and a design method for a particle damper. The shell of the particle damper is filled with a mixture of hard damping particles and semi-hard damping particles. The synergistic effect of the hard damping particles and semi-hard damping particles can automatically adjust the particle collision behavior according to changes in the vibration environment, resulting in higher energy dissipation capacity under the same conditions.

[0005] The technical solution adopted by the embodiments of the present invention to solve its technical problem is as follows: A particle damper includes a housing, the housing having an upper and lower connected cover plate and a shell, the shell containing a receiving cavity and a partition plate, the receiving cavity being divided by the partition plate to form a main cavity and a sub-cavity, the volume of the main cavity being larger than the volume of the sub-cavity, the main cavity containing a first damping particle, the first damping particle being a mixture of hard damping particles and semi-hard damping particles.

[0006] The beneficial effects of the above technical solution are: the main cavity is filled with conventional hard damping particles and semi-hard damping particles. The synergistic effect of hard damping particles and semi-hard damping particles can not only reduce vibration and noise, but also automatically adjust the particle collision behavior according to changes in the vibration environment, reducing the need for damper replacement.

[0007] The outer shell is a regular prism structure, and the shell contains side walls and a bottom wall connected vertically. The bottom wall is a regular polygon structure, and the corners of the partition plate and the bottom wall correspond one-to-one. The total volume of the sub-cavities is 1 / 10 to 1 / 20 of the volume of the main cavity.

[0008] The rigid damping particles are made of solid metal and have an elastic modulus of 100 GPa-400 GPa. The semi-rigid damping particles are made of plastic or rubber and have an elastic modulus of 60 MPa-1000 MPa.

[0009] Within the main cavity, the ratio of the number of rigid damping particles to the number of semi-rigid damping particles is 10:1 to 50:1. The first damping particles are arranged in at least one layer in the vertical direction, and more than 10 of the first damping particles can be arranged in the horizontal direction. The filling rate of the first damping particles is 80%-95%.

[0010] The sub-cavity contains a second damping particle, which is a hard damping particle. The damping particle in the sub-cavity is made of solid metal and has an elastic modulus of 100 GPa-400 GPa. The particle size of the second damping particle in the sub-cavity is less than 2 mm, and the filling rate of the second damping particle is 10%-40%.

[0011] The inner surface of the housing is provided with raised particles. The first damping particle is in contact with the raised particles. The raised particles are made of hard alloy and are arranged in regular rows.

[0012] The outer edge of the shell is provided with a mortise and tenon structure. The side wall has multiple side wall surfaces, which correspond one-to-one with the side edge of the bottom wall. Along the circumference of the side wall, the mortise and tenon structure contains alternating tenon units and mortise units set on the outer side wall surfaces. Two adjacent particle dampers in the horizontal direction can be connected by matching their respective tenon units and mortise units. The total connection length of the tenon units and mortise units is the same as the connection length of the side wall surfaces. The installation direction of the tenon units and mortise units is the vertical direction.

[0013] The bottom wall has six mounting through holes, which correspond one-to-one with the corners of the bottom wall. The mounting through holes are located in the sub-cavity. Two adjacent particle dampers in the vertical direction can be connected by fasteners, which include nuts and bolts. The bolts pass through the mounting through holes, and the nuts are located in the sub-cavity.

[0014] A method for designing a particle damper, the method comprising the following steps: Step 1: Vibration Detection The vibration behavior of the object to be damped is obtained, and the dominant frequency and acceleration of the object to be damped are analyzed. Step 2: Design vibration damping unit Based on the available damping space around the object to be damped, the external dimensions of the particle damper are designed, such that at least one particle damper can be laid flat and installed in the available damping space; the particle damper is the particle damper described above. Step 3: Laboratory Optimal Particle Matching Test The outer shell of the particle damper is fabricated, and the first damping particles are filled into the main cavity. The vibration reduction test of the particle damper is carried out on a vibration reduction test bench with the target vibration value of the object to be damped as the standard. The optimal physical parameters of the first damping particles and the dimensions of the outer shell are obtained through a limited number of experiments.

[0015] The beneficial effects of the embodiments of the present invention are: 1. The main cavity is filled with conventional hard damping particles and semi-hard damping particles. The synergistic effect of hard damping particles and semi-hard damping particles can not only reduce vibration and noise, but also automatically adjust the particle collision behavior according to changes in the vibration environment, reducing the need for damper replacement.

[0016] 2. The surface of the stud is reinforced by filling the sub-cavity with small-diameter hard damping particles, which enhances the fatigue life of the stud and improves the reliability of the connector.

[0017] 3. The particle damper has the functions of horizontal laying and vertical extension, which can quickly assemble modules and adapt to different vibration scenarios; 4. The inner surface of the shell of the particle damper is provided with protruding particles, which can change the motion behavior of the damping particles, improve the collision strength between the middle particles and the inner cavity, and have a higher energy dissipation capacity under the same conditions.

[0018] 5. The hexagonal shell assembly is dense, which can make the most of the limited space of the structure to be vibration damped, and has strong applicability. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a front view schematic diagram of the casing.

[0021] Figure 2 This is a three-dimensional schematic diagram of the shell.

[0022] Figure 3 This is a schematic diagram of the fasteners installed on the housing.

[0023] Figure 4 This is a schematic diagram of multiple housings connected and installed in a horizontal direction.

[0024] Figure 5 This is a front view schematic diagram of the pad.

[0025] Figure 6 This is a three-dimensional schematic diagram of the pad.

[0026] Figure 7 This is an assembly diagram of the particle damper described in this invention.

[0027] The annotations in the attached figures are explained as follows: 1. Shell; 2. Mortise and tenon structure; 3. Mounting through hole; 4. Fastener; 5. Pad; 6. Cover plate; 101. Main cavity; 102. Sub-cavity; 103. Receiving cavity; 104. Side wall; 105. Bottom wall; 106. Partition plate; 107. Side wall surface; 201. Tenon unit; 202. Mortise unit; 401. Nut; 402. Bolt; 501. Protruding particles. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates perpendicular to. Figure 1 The direction of the paper and the direction pointing outwards from the paper; the directional word "down" indicates perpendicular to the direction of the paper. Figure 1 The direction of the paper and pointing inwards; the directional word "left" indicates... Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates Figure 1 The direction above, the directional word "back" indicates Figure 1 The direction is below the center. This invention is described from the perspective of a reader or user, but the above directional terms should not be understood or interpreted as limiting the scope of protection of this invention.

[0030] like Figures 1 to 3 , Figure 7 As shown in the embodiment of the present invention, a particle damper includes a shell, the shell having a cover plate 6 and a housing 1 connected vertically, the housing 1 containing a receiving cavity 103 and a partition plate 106, the receiving cavity 103 being divided by the partition plate 106 to form a main cavity 101 and a plurality of sub-cavities 102, the volume of the main cavity 101 being larger than the volume of the sub-cavities 102, the main cavity 101 containing a first damping particle, the first damping particle being a mixture of hard damping particles and semi-hard damping particles.

[0031] There can be multiple main cavities 101. The volume of the main cavity 101 is larger than the volume of the sub-cavities 102. The main cavity 101 of the particle damper is filled with a mixture of hard damping particles and semi-hard damping particles. The synergistic effect of the hard damping particles and semi-hard damping particles can automatically adjust the particle collision behavior according to the changes in the vibration environment, and has a higher energy dissipation capacity under the same conditions.

[0032] In this embodiment, the outer shell is a regular prism structure. The shell 1 includes a side wall 104 and a bottom wall 105 connected vertically. The protruding particles 501 can be located on the inner surface of one or more of the side wall 104, the bottom wall 105, and the cover plate 6. The bottom wall 105 is a regular polygon structure. The partition plates 106 correspond one-to-one with the corners of the bottom wall 105. The partition plates 106 are located at each corner of the bottom wall 105. The cavity 103 is divided by the partition plates 106 to form a main cavity 101 and multiple sub-cavities 102. The total volume of the sub-cavities 102 is 1 / 10 to 1 / 20 of the volume of the main cavity 101.

[0033] For example, the outer shell is a regular hexagonal prism structure, the bottom wall 105 is a regular hexagonal structure, and the side peripheral walls 104 contain six side wall surfaces 107, which correspond one-to-one with the six sides of the bottom wall 105. Partition plates 106 are located at the six corners of the bottom wall 105, and the accommodating cavity 103 is divided by the partition plates 106 to form a main cavity 101 and six sub-cavities 102. The use of a hexagonal structure to achieve planar close-packing can fully utilize the space of the structure to be vibration-damped.

[0034] Both the main cavity 101 and the sub-cavity 102 accommodating the cavity 103 are filled with damping particles. The main cavity 101 contains first damping particles, and the sub-cavity 102 contains second damping particles. Both the first and second damping particles can be spherical. Preferably, the diameter of the damping particles in the main cavity 101 is larger than the diameter of the damping particles in the sub-cavity 102.

[0035] Within the main cavity 101, the rigid damping particles can be made of solid metal, such as iron or aluminum, and their elastic modulus is 100 GPa-400 GPa. The semi-rigid damping particles can be made of plastic or rubber, such as foamed plastic or foamed rubber, and their elastic modulus is 60 MPa-1000 MPa.

[0036] Within the main cavity 101, the diameters of the rigid damping particles and the semi-rigid damping particles can be obtained through a limited number of experiments. The ratio of the number of rigid damping particles to the number of semi-rigid damping particles is 10:1 to 50:1. The first damping particles are arranged in at least one layer in the vertical direction (i.e., up and down direction), and more than 10 of the first damping particles can be arranged in the horizontal direction. The filling rate of the first damping particles can be 80%-95%.

[0037] The synergistic effect of rigid and semi-rigid damping particles is twofold: firstly, it reduces noise while simultaneously reducing vibration; secondly, the deformation and recovery of the semi-rigid damping particles occur during vibration, as they collide with the rigid damping particles, causing deformation. The deformation of the semi-rigid damping particles increases with the increase of vibration intensity, while the movement space of the rigid damping particles increases, thereby enhancing the energy dissipation effect of the collision. When the equipment stops operating, i.e., when the vibration stops, the deformation of the semi-rigid damping particles recovers, thus achieving the purpose of self-adjustment.

[0038] The sub-cavity 102 contains a second damping particle, which is a hard damping particle made of solid metal, such as iron or aluminum, and has an elastic modulus of 100 GPa-400 GPa. The particle size of the second damping particle in the sub-cavity 102 is less than 2 mm, and the filling rate of the second damping particle is 10%-40%.

[0039] The inner surface of the housing 1 is provided with raised particles 501. The first damping particle is in contact with the raised particles 501. The raised particles 501 are made of hard alloy and are arranged in regular rows. Or, as Figures 5 to 7 As shown, the outer shell also includes a pad 5, which is matched and disposed within the main cavity 101. The pad 5 can be made of metal, such as steel. The pad 5 is stacked and connected to the bottom wall 105 and / or the cover plate 6. When the pad 5 is stacked and connected to the bottom wall 105, the protruding particles 501 are located on the upper surface of the pad 5; when the pad 5 is stacked and connected to the cover plate 6, the protruding particles 501 are located on the lower surface of the pad 5.

[0040] In existing particle dampers, only the particles near the inner wall at the edge can interact with the housing; the middle part only experiences inter-particle interaction, resulting in a lower energy dissipation rate for the particles in the middle compared to those at the edges. In this invention, the inner surface of the particle damper's housing is provided with protruding particles 501. These protruding particles 501 can be located on the inner surface of the cover plate 6 and / or the housing 1, allowing the damping particles to contact them. This transforms the interaction between the particles and the inner cavity bottom wall from mere frictional energy dissipation to collisional friction, increasing the intensity of particle motion, enhancing inter-particle energy dissipation, reducing the vibration response of the main structure, altering the damping particle motion behavior, and increasing the collision intensity between the middle particles and the inner cavity, thus achieving higher energy dissipation capacity under the same conditions.

[0041] The raised particles 501 can be made of cemented carbide or other wear-resistant and impact-resistant materials. The raised particles 501 are arranged in regular rows and columns, have a conical structure, and have a volume of 10 mm². 3 -100mm 3 When the pad 5 is stacked and connected to the bottom wall 105, the top of the protruding particle 501 faces upward and the bottom faces downward; when the pad 5 is stacked and connected to the cover plate 6, the top of the protruding particle 501 faces downward and the bottom faces upward. The protruding particle 501 is fixed to the outer shell by welding or inlaying. The outer shell includes the cover plate 6, the shell 1, and the pad 5.

[0042] In this invention, the modular particle dampers (which can be called modular particle dampers) are connected by a simple mechanical mechanism, improving reliability, meeting the needs of temporary and rapid installation, and significantly increasing the tunable bandwidth. The interaction between the damping particles and the shell is enhanced, achieving better energy dissipation at the same fill rate. The particle damper is functionally divided into a main cavity 101 and a sub-cavity 102. The main cavity 101 provides vibration reduction, noise reduction, and collision self-adjustment, while the sub-cavity 102 enhances the fatigue life and reliability of the connecting components.

[0043] like Figure 4 As shown, in order to achieve the flat combination of multiple particle dampers in the horizontal direction, a mortise and tenon structure 2 is provided on the outer edge of the shell 1. The side wall 104 contains multiple side wall surfaces 107, and the side wall surfaces 107 correspond one-to-one with the side edges of the bottom wall 105. Along the circumference of the side wall 104, the mortise and tenon structure 2 contains tenon units 201 and mortise units 202 alternately arranged on the outside of the side wall surfaces 107. Two adjacent particle dampers in the horizontal direction are matched and connected by their respective tenon units 201 and mortise units 202. The installation direction of the tenon units 201 and mortise units 202 is the vertical direction.

[0044] For example, the outer shell is a regular hexagonal prism structure, and the side peripheral wall 104 contains six side wall surfaces 107. Along the circumference of the side peripheral wall 104, tenon units 201 and mortise units 202 are arranged alternately on the outside of the side wall surfaces 107. The tenon units 201 are located in the middle of the side wall surface 107, and the mortise units 202 are located at both ends of the side wall surface 107. Two mortise units 202 form a mortise groove. The tenon units 201 of two adjacent particles of the damper in the horizontal direction are matched and connected with the mortise groove. It is necessary to ensure that the total connection length of the tenon units 201 and mortise units 202 is the same as the connection length of the side wall surface 107 to ensure that the connection strength on both sides is matched.

[0045] To achieve the combination of multiple particle dampers in the vertical direction, six mounting through holes 3 are provided on the bottom wall 105. The mounting through holes 3 correspond one-to-one with the corners of the bottom wall 105. The mounting through holes 3 are located inside the sub-cavity 102 and correspond to the sub-cavity 102. Two adjacent particle dampers in the vertical direction are connected by fasteners 4. The fasteners 4 include nuts 401 and bolts 402. The bolts 402 pass through the mounting through holes 3, and the nuts 401 are located inside the sub-cavity 102. The diameter of the mounting through holes 3 is larger than the diameter of the bolts 402 but smaller than the outer edge of the nuts 401.

[0046] like Figure 7 As shown, the cover plate 6 and the bottom wall 105 are symmetrical and mirror images of each other. The cover plate 6 is provided with six mounting through holes 3, and the mounting through holes 3 on the cover plate 6 correspond one-to-one with the mounting through holes 3 on the bottom wall 105. The bolt 402 passes through the mounting through holes 3 on the cover plate 6 and the mounting through holes 3 on the bottom wall 105.

[0047] The height of nut 401 is less than the height of sub-cavity 102, allowing the hard damping particles filling sub-cavity 102 to contact the outer circumferential surface of bolt 402. Filling sub-cavity 102 with small-diameter hard damping particles strengthens the surface of bolt 402, enhancing stud fatigue life and improving connection reliability. Multiple particle dampers in the vertical direction can be connected and fixed using fasteners 4 or by welding.

[0048] According to the vibration condition of the component to be damped, the corresponding particle damper is matched and combined accordingly. The particle damper is quickly laid out horizontally through the mortise and tenon structure 2, and further longitudinally extended through the fastener 4.

[0049] A method for designing a particle damper, the method comprising the following steps: Step 1: Vibration Detection The vibration behavior of the object to be damped is obtained, and the dominant frequency and acceleration of the object to be damped are analyzed. Step 2: Design vibration damping unit Based on the available damping space around the object to be damped, the external dimensions of the particle damper are designed, such that at least one particle damper can be laid flat and installed in the available damping space; the particle damper is the particle damper described above. Step 3: Laboratory Optimal Particle Matching Test The outer shell of the particle damper is fabricated. The first damping particle is filled in the main cavity 101, and the second damping particle is filled in the sub-cavity 102. The vibration reduction test of the particle damper is carried out on the vibration reduction test bench with the target vibration value of the object to be damped as the standard. The optimal physical parameters of the first damping particle and the second damping particle and the size of the outer shell are obtained through a limited number of experiments.

[0050] For example, through a limited number of experiments, it was found that: in the main cavity 101, the elastic modulus of the rigid damping particles is 100GPa-400GPa, and the elastic modulus of the semi-rigid damping particles is 60-1000MPa. The ratio of rigid damping particles to semi-rigid damping particles is 10:1 to 50:1. The particle size of the damping particles ensures that more than 10 particles can be accommodated in the plane direction of the main cavity 101, and the filling amount in the thickness direction of the main cavity 101 is not less than one layer of damping particles. The filling rate of damping particles in the main cavity 101 is 80%-95%. In the sub-cavity 102, round rigid damping particles are filled. The particle size of the rigid damping particles is less than 2mm. During vibration, the particles strengthen the surface of the bolt 402, enhancing the fatigue life of the stud. The filling rate is 10%-40%.

[0051] In practical use, the number of the combined particle dampers can be adjusted according to the actual situation, and the particle size, filling rate, material and other parameters of each particle damper can also be different, thereby expanding the application scenarios.

[0052] Whether or not to add a backing plate 5 can be chosen based on the actual situation. Alternatively, the backing plate 5 can be fixed inside the housing by welding or other methods; or, when making the housing, the backing plate 5 can be directly made into the bottom surface of the housing, which can simplify the installation process and reduce the additional weight.

[0053] If multiple layers are stacked, the cover plate 6 can be omitted except for the top-layer particle damper. That is, among the multiple stacked particle dampers, only the top-layer particle damper has a cover plate 6, while the particle dampers in the other layers do not. The upper layer can be used to press down the lower layer, thereby reducing the added weight and speeding up the installation process.

[0054] The specific application of the particle damper is described below.

[0055] A vibration structure was measured on-site, and then the particle damper was installed. The changes in relevant indicators before and after the installation were compared. It can be seen that the vibration reduction effect of the embodiment can reach 61%, while the alternative example also has a certain vibration reduction effect of 45%, which is weaker than that of the present invention. The noise generated by the particle damper of the present invention is only 60 dB, while the noise of the alternative example increases to 70 dB due to the absence of soft particles, as shown in Table 1.

[0056] Table 1

[0057] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used together.

Claims

1. A particle damper, characterized in that, The particle damper includes a housing, which contains a pad (5) and a cover plate (6) and a shell (1) connected at the top and bottom. The housing is a regular hexagonal prism structure. The shell (1) contains a side wall (104) and a bottom wall (105) connected vertically. The bottom wall (105) is a regular hexagonal structure. The shell (1) contains a cavity (103) and a partition plate (106). The corners of the partition plate (106) and the bottom wall (105) correspond one-to-one. The cavity (103) is divided by the partition plate (106) to form a main cavity (101) and a sub-cavity (102). The total volume of the sub-cavity (102) is 1 / 10 to 1 / 20 of the volume of the main cavity (101). The main cavity (101) contains a first damping particle, which is a mixture of hard damping particles and semi-hard damping particles. The hard damping particles are made of solid metal and have an elastic modulus of 100GPa-400GPa. The semi-hard damping particles are made of plastic or rubber and have an elastic modulus of 60MPa-1000MPa. The sub-cavity (102) contains a second damping particle. The material of the second damping particle is solid metal. The elastic modulus of the hard damping particle is 100GPa-400GPa. The particle size of the second damping particle is less than 2mm. The filling rate of the second damping particle is 10%-40%. The bottom wall (105) is provided with six mounting through holes (3), and the mounting through holes (3) correspond one-to-one with the corners of the bottom wall (105). The mounting through holes (3) are located inside the sub-cavity (102). Two adjacent particle dampers in the vertical direction can be connected by fasteners (4). The fasteners (4) contain nuts (401) and bolts (402). The bolts (402) pass through the mounting through holes (3), and the nuts (401) are located inside the sub-cavity (102). The pad (5) is matched and disposed in the main cavity (101). The pad (5) is stacked and connected with the bottom wall (105) or the cover plate (6). The inner surface of the shell (1) is provided with protruding particles (501). When the pad (5) is stacked and connected with the bottom wall (105), the protruding particles (501) are located on the upper surface of the pad (5). When the pad (5) is stacked and connected with the cover plate (6), the protruding particles (501) are located on the lower surface of the pad (5).

2. The particle damper according to claim 1, characterized in that, Inside the main cavity (101), the ratio of the number of rigid damping particles to the number of semi-rigid damping particles is 10:1 to 50:

1. The first damping particles are arranged in at least one layer in the vertical direction, and more than 10 of the first damping particles can be arranged in the horizontal direction. The filling rate of the first damping particles is 80%-95%.

3. The particle damper according to claim 1, characterized in that, The first damping particle is in contact with the protruding particle (501), which is made of hard alloy and is arranged in regular rows.

4. The particle damper according to claim 1, characterized in that, The outer edge of the shell (1) is provided with a mortise and tenon structure (2). The side wall (104) contains multiple side wall surfaces (107). The side wall surfaces (107) correspond one-to-one with the side of the bottom wall (105). Along the circumference of the side wall (104), the mortise and tenon structure (2) contains tenon units (201) and mortise units (202) alternately arranged outside the side wall surfaces (107). Two adjacent particle dampers in the horizontal direction can be matched and connected by their respective tenon units (201) and mortise units (202). The total connection length of the tenon units (201) and mortise units (202) is the same as the connection length of the side wall surfaces (107). The installation direction of the tenon units (201) and mortise units (202) is the up and down direction.

5. A design method for a particle damper, characterized in that, The design method of the particle damper includes the following steps in sequence: Step 1: Vibration Detection The vibration behavior of the object to be damped is obtained, and the dominant frequency and acceleration of the object to be damped are analyzed. Step 2: Design vibration damping unit Based on the available damping space around the object to be damped, the external dimensions of the particle damper are designed such that at least one particle damper can be laid flat and installed in the available damping space; the particle damper is the particle damper as described in claim 1. Step 3: Laboratory Particle Matching Test The outer shell of the particle damper is fabricated, and the first damping particles are filled into the main cavity (101). The vibration reduction test of the particle damper is carried out on the vibration reduction test bench with the target vibration value of the object to be damped as the standard. The physical parameters of the first damping particles and the dimensions of the outer shell are obtained through the test.

Images