Steel wire rope damper and vibration damping device for cable structures

Abstract

This invention relates to a wire rope damper and vibration reduction device for cable structures. The wire rope damper dissipates energy from the vibration of the cable structure through the wire rope, effectively suppressing high-frequency vibrations and providing some suppression of low-frequency vibrations. Furthermore, by providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between two clamping plates of at least one clamping plate unit, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the two corresponding permanent magnets to eliminate the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure during compression. The second permanent magnet type magnetic stiffness element utilizes the magnetic force of the two corresponding permanent magnets to eliminate the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure during tension, thereby improving the control effect of the wire rope damper on the cable structure vibration and enabling the wire rope damper to meet higher requirements for cable structure vibration reduction.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology for cable structures, and in particular to a wire rope damper and vibration reduction device for cable structures. Background Technology

[0002] In recent years, with the increasing span of cable-stayed or suspension bridges, the length of the cable structure has also been continuously growing. Long-span cable-stayed or suspension bridges have small cable structures with low damping, making them highly susceptible to wind-induced vibrations such as vortex-induced resonance, wake galloping, and wind-induced vibrations under external excitations such as wind, rain, and bridge deck vibrations. Vibration of the cable structure can cause fatigue at the cable end joints, leading to rupture of the cable structure's protective sleeve or cracking of the lugs, thus accelerating corrosion of the steel wires within the cable structure and, in severe cases, even causing cable structure failure. Furthermore, cable structure vibration can sometimes also cause bridge deck vibration, affecting driving comfort and bridge safety. Therefore, to ensure the safe operation of bridges, it is essential to effectively suppress cable structure vibration.

[0003] Currently, the damping and vibration reduction measures used in actual bridge construction mainly include the installation of vibration damping hammers, high-damping rubber dampers, viscous dampers, and viscous shear dampers. Wire rope dampers are rarely used for cable-stayed structure vibration reduction; they are primarily used in aerospace and seismic isolation. Traditional wire rope dampers require multiple dampers to be installed circumferentially along the cable structure, resulting in complex installation, inconvenient maintenance and replacement, and high costs. Furthermore, like metal dampers, traditional wire rope dampers exhibit a significant reduction in vibration reduction performance due to their high stiffness.

[0004] Furthermore, the cables or power transmission lines of long-span suspension bridges are mostly arranged in a multi-strand cable structure. Compared to single-strand cable structures, multi-strand cable structures are more prone to collisions and significant swaying between strands due to large-amplitude vibrations. These collisions and swaying can damage the cable structure and cause fatigue at the cable end joints, threatening structural safety. High-order, small-amplitude vibrations can also induce bending stress at the cable anchorages, leading to fatigue fracture. Current vibration reduction measures for multi-strand cable structures mainly include spiral winding, installation of separators, cable end dampers, and auxiliary cables. While spiral winding and rigid partitions can effectively control wake vibration in multi-strand cable structures, they are still difficult to control high-order vortex-induced vibrations. Installing auxiliary cables encroaches on space outside the strands, resulting in poor aesthetics. Traditional cable-end dampers require individual dampers for each cable, which is costly. If wire rope dampers are used, they can only be installed individually along each cable, making installation complex and requiring support devices that connect the wire rope damper's clamps to the bridge deck, further increasing costs. This severely limits the placement of wire rope dampers, preventing them from being installed at higher altitudes. Summary of the Invention

[0005] The purpose of this invention is to address the problem that existing wire rope dampers, compared to other dampers, have significantly reduced vibration reduction performance due to their higher stiffness, and to provide a wire rope damper and vibration reduction device for cable structures.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A wire rope damper for a cable structure includes a wire rope and at least one clamping plate unit. Each clamping plate unit includes two clamping plate groups, and each clamping plate group has a plurality of through holes through which the wire rope passes. The wire rope passes sequentially through the through holes of the two clamping plate groups of at least one clamping plate unit to form a helical structure. The two clamping plate groups of the clamping plate unit through which the wire rope passes move closer or further apart along the radial direction corresponding to the helical structure, which can cause the wire rope to dissipate energy. At least one clamping plate group is used to connect the cable structure.

[0008] At least one clamping unit has a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between two clamping plate groups. Both the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element include two permanent magnets, and each permanent magnet has two poles. The first permanent magnet type magnetic stiffness element can reduce the positive stiffness of the wire rope compression when the two clamping plate groups of the clamping unit are close together by utilizing the magnetic force of the corresponding two permanent magnets. The second permanent magnet type magnetic stiffness element can reduce the positive stiffness of the wire rope tension when the two clamping plate groups of the clamping unit are far apart by utilizing the magnetic force of the corresponding two permanent magnets.

[0009] The wire rope damper for cable structures described in this solution can have the number of clamping units selected according to actual needs. Each clamping unit has two clamping plate groups. The wire rope passes through the through holes of the two clamping plate groups, forming a spiral structure. This structure can limit the movement of the two clamping plate groups in each clamping unit. When one clamping plate group of the clamping unit is connected to the cable structure, and the other clamping plate group is connected to another cable structure or a fixed support, the vibration of the cable structure will cause the corresponding clamping plate group to vibrate in the same way. This will cause the two clamping plate groups of the clamping unit to move closer or further apart. The spiral structure connected by the two clamping plate groups of the clamping unit will form radial compression or tension, thereby using the wire rope to dissipate energy.

[0010] This solution involves providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between the two clamping plates of at least one clamping plate unit. The first permanent magnet type magnetic stiffness element utilizes the magnetic force of the two corresponding permanent magnets to reduce the positive stiffness of the wire rope compression when the two clamping plates of the clamping plate unit approach each other. That is, when the cable structure connecting the two clamping plates of the clamping plate unit equipped with the first permanent magnet type magnetic stiffness element vibrates and compresses, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the two corresponding permanent magnets to generate a force that brings the two clamping plates of the clamping plate unit closer together, thereby eliminating the effect of the wire rope damper's own stiffness on the cable. The reduction effect of structural vibration damping performance improves the control effect on cable structure vibration; the second permanent magnet type magnetic stiffness element can reduce the positive stiffness of the wire rope tension when the two clamping groups of the clamping unit move away from each other by using the magnetic force of the corresponding two permanent magnets. That is, when the cable structure connected by the two clamping groups of the clamping unit equipped with the second permanent magnet type magnetic stiffness element vibrates and causes tension, the second permanent magnet type magnetic stiffness element can generate a force that moves the two clamping groups of the clamping unit away by using the magnetic force of the corresponding two permanent magnets, thereby eliminating the reduction effect of the wire rope damper's own stiffness on the vibration damping performance of the cable structure and improving the control effect on cable structure vibration.

[0011] The wire rope damper for cable structures described in this solution dissipates energy from cable structure vibrations through the wire rope. It effectively suppresses high-frequency vibrations and also has a certain degree of suppression on low-frequency vibrations. Furthermore, by providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between the two clamping plate groups of at least one clamping plate unit, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the corresponding two permanent magnets to generate a force that brings the two clamping plate groups of the clamping plate unit closer together, reducing the compressive stiffness of the wire rope damper. This eliminates the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure during compression. The second permanent magnet type magnetic stiffness element uses the magnetic force of the two corresponding permanent magnets to generate a force that moves the two clamping plates of the clamping plate unit away from each other, reducing the positive stiffness of the wire rope damper during tension. This eliminates the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure during tension, improves the vibration control effect, and enables the wire rope damper to meet the higher vibration reduction requirements of cable structures, such as power transmission lines, cable stays of cable-stayed bridges, or suspension cables of suspension bridges.

[0012] Preferably, at least one of the clamping plate units is provided with a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element between the two clamping plate groups.

[0013] The first permanent magnet type magnetic stiffness element includes two first permanent magnets, and the second permanent magnet type magnetic stiffness element includes two second permanent magnets. Both the first and second permanent magnets have two poles. The two first permanent magnets are respectively disposed near the two clamping plate groups of the clamping unit, and the two first permanent magnets are respectively connected and fixed to the clamping plate groups they are close to. The two first permanent magnets have opposing surfaces, and the opposing surfaces of the two first permanent magnets are opposite in polarity. The two clamping plate groups of the clamping unit can move closer to each other along the radial direction corresponding to the spiral structure, which can drive the two first permanent magnets to move closer. The two second permanent magnets are respectively disposed near the two clamping plate groups of the clamping unit, and the two second permanent magnets are respectively connected and fixed to the clamping plate groups they are far from. The two second permanent magnets have opposing surfaces, and the opposing surfaces of the two second permanent magnets are opposite in polarity. The two clamping plate groups of the clamping unit can move closer to each other along the radial direction corresponding to the spiral structure, which can drive the two second permanent magnets to move closer.

[0014] In this scheme, at least one of the clamping plate units is provided with a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element between the two clamping plate groups. That is, the tension and compression generated by the vibration of the cable structure connected by the clamping plate unit can reduce the normal stiffness of the wire rope damper, thereby eliminating the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure and improving the vibration control effect. When the cable structure vibrates and causes the wire rope damper to compress, the two first permanent magnets move closer together, increasing their magnetic attraction and thus the force that pulls the two clamping plates of the clamping unit closer together. Meanwhile, the two second permanent magnets, connected to more distant clamping plates, move further apart, decreasing their magnetic attraction and thus the force that pulls the two clamping plates of the clamping unit further apart, reducing the normal stiffness of the wire rope damper during compression. Conversely, when the cable structure vibrates and causes the wire rope damper to stretch, the two first permanent magnets move further apart, decreasing their magnetic attraction and thus the force that pulls the two clamping plates of the clamping unit closer together. Meanwhile, the two second permanent magnets, connected to more distant clamping plates, move closer together, increasing their magnetic attraction and thus the force that pulls the two clamping plates of the clamping unit further apart, reducing the normal stiffness of the wire rope damper during stretching.

[0015] Preferably, the two second permanent magnets are respectively connected and fixed to the clamping plate assembly located away from them by a fixing plate;

[0016] The fixing plate includes a first fixing plate, a second fixing plate, and a third fixing plate. The first fixing plate and the third fixing plate are respectively disposed near two clamping plate groups of the clamping plate unit. The first fixing plate and the third fixing plate are disposed in parallel. The second fixing plate is perpendicularly connected between the first fixing plate and the third fixing plate. The first fixing plate is connected to the clamping plate group it is adjacent to. The second permanent magnet is connected to the third fixing plate.

[0017] The second permanent magnet is located between the two third fixing plates.

[0018] By using the aforementioned fixing plate to set up two second permanent magnets, the installation of the two second permanent magnets is more convenient and the connection is more stable, which is conducive to the two second permanent magnets reducing the tensile stiffness of the wire rope damper.

[0019] Preferably, the clamping plate group is arranged along the axial direction of the cable structure, the through holes of each clamping plate group are distributed at intervals along the axial direction of the cable structure, the spiral structure is arranged between the two clamping plate groups of all the clamping plate units, and the angle between the length direction of the spiral structure and the axial direction of the cable structure is greater than or equal to 0° and less than or equal to 30°.

[0020] When the length direction of the helical structure is aligned with the axial direction of the cable structure, the damping effect is better compared to when the length direction of the helical structure is aligned with the circumferential direction of the cable structure. When the length direction of the helical structure is aligned with the axial direction of the cable structure, there can be an angle of less than or equal to 30° with the axial direction of the cable structure, but the damping effect is best when the angle is 0°.

[0021] Preferably, the wire rope damper comprises only one of the aforementioned clamp units;

[0022] One of the clamping plates of the clamping plate unit is used to connect the cable structure, and the other clamping plate unit is used to connect the first bracket, the first bracket being fixed; or the two clamping plate groups of the clamping plate unit are respectively connected to one of the cable structures.

[0023] When the wire rope damper includes only one clamping unit, if one clamping plate group of the clamping unit is used to connect the cable structure and the other clamping plate group is connected to a first support, and the first support is fixed, then the fixing of the first support is inevitable and will restrict the installation position of the wire rope damper. If the two clamping plate groups of the clamping unit are each connected to a cable structure, then there is no need to install a support. The energy dissipation of the wire rope can be achieved simply by utilizing the different vibrations of the two cable structures. This method has a wider range of applications and can adapt to installation at any height of the two cable structures.

[0024] Preferably, the two clamping plate groups of the clamping plate unit are respectively connected to one of the cable structures, and the two clamping plate groups of the clamping plate unit are located at different axial heights corresponding to the cable structures.

[0025] By adopting the above arrangement, the two clamping plate groups are respectively connected to different heights of the different cable structures. This can avoid the small deformation of the wire rope damper when the different cable structures move synchronously. By utilizing the characteristic that the amplitude of the vibration of the cable structure is different at different heights, the deformation and energy dissipation capacity of the wire rope damper can be improved, thereby improving its vibration reduction performance.

[0026] Preferably, the wire rope damper includes at least two clamping plate units, and a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element are provided between the two clamping plate groups of all the clamping plate units. The clamping plate units are staggered in the circumference of the spiral structure, and all the clamping plate groups are respectively used to connect one of the cable structures.

[0027] The first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to different clamping plate units are located at different heights of the cable structure.

[0028] The above arrangement can be adapted to the vibration reduction and energy dissipation of cable structures with an even number of cables, such as 4, 6, or 8, and the vibration reduction and energy dissipation effect is better for both high-frequency and low-frequency vibrations.

[0029] Preferably, the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to the clamping plate unit are arranged side by side at the same axial height of the cable structure, which can avoid setting the clamping plate group of the clamping plate unit too long along the axial length of the cable structure, and make the arrangement more convenient.

[0030] Preferably, the wire rope damper includes only one clamping unit, wherein the two clamping plate groups of the clamping unit are both annular, the axial direction of the clamping plate groups is the same as the axial direction of the cable structure, the two clamping plate groups are arranged in an inner and outer ring, and there is a gap between the two clamping plate groups. The wire rope is passed between the two clamping plate groups to form the spiral structure, and the length direction of the spiral structure is the same as the circumferential direction of the clamping plate groups.

[0031] One of the clamping plate groups of the clamping plate unit is used to connect the cable structure, and the other clamping plate group is connected to the second bracket, the second bracket being fixed; or the two clamping plate groups of the clamping plate unit are respectively connected to one of the cable structures.

[0032] The wire rope damper in this design is arranged in a ring shape, and both clamping plates of the clamping plate unit are also ring-shaped, arranged in an inner and outer ring configuration. This allows for better control of both high-frequency and low-frequency vibrations of the cable structure, while also reducing the reduction in vibration control performance of the cable structure due to the damper's own normal stiffness during tension and compression.

[0033] A vibration damping device for cable structures includes at least two wire rope dampers for cable structures, all of which are connected in parallel at different axial heights of the corresponding cable structures.

[0034] At least two wire rope dampers for the cable structure can be arranged along the length of the cable structure to compensate for the damping ratio of the failure mode, thereby improving the vibration reduction frequency band of the wire rope damper and making the vibration reduction effect of the entire vibration reduction device for the cable structure better. Moreover, there is no interference between the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element between different wire rope dampers for the cable structure. Therefore, it is still possible to achieve good control of high-frequency vibration and low-frequency vibration of the cable structure at the same time. At the same time, it can reduce the reduction of the cable structure vibration control performance by the normal stiffness of the wire rope damper itself during tension and compression.

[0035] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] 1. The wire rope damper for cable structures described in this invention dissipates energy from cable structure vibrations through the wire rope, effectively suppressing high-frequency vibrations. By providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between the two clamping plates of at least one clamping plate unit, the first permanent magnet type magnetic stiffness element generates a force that brings the two clamping plates of the clamping plate unit closer together using the magnetic force of the corresponding two permanent magnets, reducing the compressive stiffness of the wire rope damper. This eliminates the reduction effect of the wire rope damper's own stiffness on the compressive vibration reduction performance of the cable structure. The second permanent magnet type magnetic stiffness element generates a force that moves the two clamping plates of the clamping plate unit further apart using the magnetic force of the corresponding two permanent magnets, reducing the tensile stiffness of the wire rope damper. This eliminates the reduction effect of the wire rope damper's own stiffness on the tensile vibration reduction performance of the cable structure, improving the control effect on cable structure vibrations and enabling the wire rope damper to meet the higher vibration reduction requirements of cable structures.

[0037] 2. In the wire rope damper for cable structures described in this invention, when the cable structure vibrates and causes the wire rope damper to compress, the two first permanent magnets move closer together, further increasing their magnetic attraction and increasing the force that pulls the two clamping plates of the clamping unit closer together. Meanwhile, the two second permanent magnets, connected to more distant clamping plates, move away from each other, further decreasing their magnetic attraction and reducing the force that pulls the two clamping plates of the clamping unit away from each other, thus reducing the normal stiffness of the wire rope damper during compression. When the cable structure vibrates and causes the wire rope damper to stretch, the two first permanent magnets move away from each other, further decreasing their magnetic attraction and reducing the force that pulls the two clamping plates of the clamping unit closer together. Meanwhile, the two second permanent magnets, connected to more distant clamping plates, move closer together, further increasing their magnetic attraction and increasing the force that pulls the two clamping plates of the clamping unit away from each other, thus reducing the normal stiffness of the wire rope damper during stretching.

[0038] 3. The wire rope damper for cable structures described in this invention has a helical structure whose length direction is along the axial direction of the cable structure. Compared to a helical structure whose length direction is along the circumferential direction of the cable structure, this provides better damping effect. When the length direction of the helical structure is along the axial direction of the cable structure, it can have an angle of less than or equal to 30° with the axial direction of the cable structure, but the damping effect is best when the angle is 0°. When the wire rope damper includes only one clamping plate unit, the two clamping plate groups of the clamping plate unit are respectively connected to one cable structure. In this case, there is no need to install a support bracket. It is only necessary to use the different vibrations of the two cable structures to achieve deformation and energy dissipation of the helical structure. This method has a wider range of applications and can be adapted to installation at any height of the two cable structures. The two clamping plate groups are respectively connected to different heights of different cable structures, which can avoid the wire rope damper having small deformation when different cable structures move synchronously. By utilizing the different amplitudes of the cable structure vibration at different heights, the deformation and energy dissipation capacity of the wire rope damper are improved, thereby improving its vibration reduction performance.

[0039] 4. The vibration damping device for cable structures described in this invention can arrange at least two wire rope dampers for cable structures along the length of the cable structure to compensate for the damping ratio of the failure mode, thereby improving the vibration damping frequency band of the wire rope dampers and making the overall vibration damping effect of the vibration damping device for cable structures better. Moreover, there is no interference between the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element between different wire rope dampers for cable structures, so it can still achieve better control of high-frequency vibration and low-frequency vibration of the cable structure at the same time. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the wire rope damper for cable structures described in Example 1;

[0041] Figure 2 This is a front view of the wire rope damper for cable structures described in Example 1;

[0042] Figure 3 This is a plan view of the wire rope damper for cable structures described in Example 1;

[0043] Figure 4 This is a side view of the wire rope damper for cable structures described in Example 1;

[0044] Figure 5 This is a schematic diagram showing the installation state of the wire rope damper for the cable structure described in Example 1 on the cable structure;

[0045] Figure 6 This is a plan view of the wire rope damper for the cable structure described in Example 1 being installed on the cable structure;

[0046] Figure 7 This is a schematic diagram of the wire rope damper for cable structures described in Example 2;

[0047] Figure 8 This is a front view of the wire rope damper for cable structures described in Example 2;

[0048] Figure 9 This is a schematic diagram showing the installation state of the wire rope damper for the cable structure described in Example 2 on the cable structure;

[0049] Figure 10 This is a side view of the wire rope damper for the cable structure described in Example 2 being installed on the cable structure.

[0050] Figure 11 This is a plan view of the wire rope damper for the cable structure described in Example 2 being installed on the cable structure;

[0051] Figure 12 This is a schematic diagram of the wire rope damper for cable structures described in Example 3;

[0052] Figure 13 This is a side view of the wire rope damper for cable structures described in Example 3;

[0053] Figure 14 This is a plan view of the wire rope damper for cable structures described in Example 3;

[0054] Figure 15 This is a schematic diagram showing the installation status of the wire rope damper for the cable structure described in Example 3;

[0055] Figure 16 This is a front view of the installation of the wire rope damper for the cable structure described in Example 3;

[0056] Figure 17 This is a schematic diagram of the wire rope damper for cable structures described in Example 4;

[0057] Figure 18 This is a front view of the wire rope damper for cable structures described in Example 4;

[0058] Figure 19 This is a plan view of the wire rope damper for cable structures described in Example 4;

[0059] Figure 20 This is a schematic diagram of the structure of the vibration reduction device for cable structures, which consists of wire rope dampers for cable structures as described in Example 5.

[0060] Figure 21 This is a front view of a vibration reduction device for cable structures, consisting of wire rope dampers for cable structures as described in Example 5.

[0061] Figure 22 This is a plan view of a vibration reduction device for cable structures, consisting of wire rope dampers for cable structures as described in Example 5.

[0062] Icons: 1-Cable structure; 2-Connector; 3-First clamping plate; 31-First anchor bolt; 4-Second clamping plate; 41-Second anchor bolt; 5-Limiting device; 6-Fixing plate; 61-First fixing plate; 62-Second fixing plate; 63-Third fixing plate; 7-Wire rope; 71-Through hole; 81-First permanent magnet; 82-Second permanent magnet. Detailed Implementation

[0063] The present invention will now be described in detail with reference to the accompanying drawings.

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0065] Example 1

[0066] This embodiment provides a wire rope damper for cable structures; see [link / reference]. Figure 1-6The system includes a steel wire rope 7 and at least one clamping plate unit. Each clamping plate unit includes two clamping plate groups. Each clamping plate group has a plurality of through holes 71 through which the steel wire rope 7 passes. The steel wire rope 7 passes through the through holes 71 of the two clamping plate groups of at least one clamping plate unit in sequence to form a spiral structure. The two clamping plate groups of the clamping plate unit through which the steel wire rope 7 passes move closer or further away along the radial direction corresponding to the spiral structure, which can cause the steel wire rope 7 to dissipate energy. At least one clamping plate group is used to connect the cable structure 1.

[0067] At least one clamping unit has a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between two clamping plate groups. Both the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element include two permanent magnets, and each permanent magnet has two poles. The first permanent magnet type magnetic stiffness element can reduce the positive stiffness of the steel wire rope 7 under compression when the two clamping plate groups of the clamping unit are close together by utilizing the magnetic force of the corresponding two permanent magnets. The second permanent magnet type magnetic stiffness element can reduce the positive stiffness of the steel wire rope 7 under tension when the two clamping plate groups of the clamping unit are far apart by utilizing the magnetic force of the corresponding two permanent magnets.

[0068] The wire rope damper for cable structures described in this solution allows for selection of the number of clamping plate units based on actual needs. Each clamping plate unit has two clamping plate assemblies. A wire rope 7 passes through the through holes 71 of the two clamping plate assemblies, forming a helical structure. The wire rope 7 is composed of multiple strands of steel wire and is wound between the clamping plate assemblies. Figure 1-3As shown. The wire rope 7 is formed by winding multiple strands of wire bundles, and each wire bundle is formed by winding multiple wires. The wire rope 7 can be configured with various properties by changing the number of strands, lay length, number of wire bundles, and lay length of the wire bundles to meet different vibration reduction requirements. Meanwhile, high-strength steel wire or stainless steel can be used to improve the performance and durability of the wire rope 7. The helical structure can limit the movement of the two clamping plate groups in each clamping plate unit. Therefore, when one clamping plate group in the clamping plate unit is connected to the cable structure 1, and the other clamping plate group is connected to another cable structure 1 or a fixed support, the vibration of the cable structure 1 will cause the corresponding clamping plate group to vibrate in the same way. That is, the clamping plate group and the cable structure 1 move together as a whole, causing the two clamping plate groups in the clamping plate unit to move closer or further apart. The wire rope damper can deform with the relative displacement of the two clamping plate groups in different directions, and the helical structure connecting the two clamping plate groups in the clamping plate unit will form radial compression or tension, thereby utilizing the wire rope 7 to dissipate energy. The wire rope damper provides damping force in the in-plane and out-of-plane directions of the cable structure 1 using the axial tension and roll directions, and in the axial (length) direction using the shear direction. A single wire rope damper can reduce the in-plane, out-of-plane, and axial vibrations of the multi-strand cable structure 1, reducing installation costs. After the wire rope damper reaches its service life, only maintenance and replacement are required, reducing the total lifespan cost. In this embodiment, the cable structure 1 refers to rope, cable, or conductor structures requiring vibration reduction, such as power transmission lines, stay cables of cable-stayed bridges, and suspension cables of suspension bridges.

[0069] Because wire rope dampers use metal components, they are durable, unaffected by temperature, and highly adaptable to the environment. Compared to traditional rubber dampers and hydraulic dampers, the damping medium is mainly steel. With appropriate anti-corrosion measures, they are even more durable, will not leak, and are easy to maintain. They are a low-cost, simple-to-install, easy-to-maintain cable-stayed damper with good vibration reduction performance.

[0070] In this scheme, when the wire rope damper includes only one clamping unit, the two clamping plates of the clamping unit can be ring-shaped. The axial direction of the clamping plate group is the same as the axial direction of the cable structure 1. The two clamping plate groups are arranged in inner and outer rings, and there is a gap between the two clamping plate groups. The wire rope 7 is passed between the two clamping plate groups to form the spiral structure. The length direction of the spiral structure is the same as the circumferential direction of the clamping plate group. One of the clamping plate groups of the clamping unit is used to connect the cable structure 1, and the other clamping plate group is connected to the second support, which is fixed. Alternatively, the two clamping plate groups of the clamping unit are respectively connected to one cable structure 1. When the wire rope damper includes only one clamping unit, the two clamping plate groups of the clamping unit can also be plate-shaped, that is, the clamping plate groups are arranged along the axial direction of the cable structure 1, and the through holes 71 of each clamping plate group are distributed at intervals along the axial direction of the cable structure 1. The helical structure is provided between the two clamping plate groups of all the clamping units, and the angle between the length direction of the helical structure and the axial direction of the cable structure 1 is greater than or equal to 0° and less than or equal to 30°. Arranging the length direction of the helical structure along the axial direction of the cable structure 1 provides better damping effect than arranging the length direction of the helical structure along the circumferential direction of the cable structure 1. When the length direction of the helical structure is arranged along the axial direction of the cable structure 1, there can be an angle of less than or equal to 30° with the axial direction of the cable structure 1, such as an angle generated during installation or production, but the damping effect is best when the angle is 0°. In this embodiment, as... Figure 2 As shown, the length direction of the spiral structure is set along the axial direction of the cable structure 1, and the deflection angle is 0°.

[0071] like Figure 5As shown, there are two wire rope dampers for the cable structure. Each wire rope damper has a clamping unit with two clamping plate groups. The two clamping plate groups of the clamping unit are respectively connected to one of the cable structures 1. When the cable structures 1 held by the two clamping plate groups vibrate inconsistently, the clamping plate groups connecting the two cable structures 1 can move relatively closer or further apart, thereby causing radial compression or tension in the helical structure between the two cable structures 1, resulting in energy dissipation in the wire rope 7. This arrangement does not require support, i.e., no bracket is needed. This structural form utilizes the characteristic that the multi-strand cable structure 1 does not move synchronously during vibration. The relative displacement between the cable structures 1 causes the wire rope damper to stretch or compress, generating damping force, thus eliminating the need for a support structure. The unsupported structure can significantly reduce costs and improve aesthetics. More importantly, the unsupported structure avoids the scenario where the damper's vibration reduction performance is reduced due to excessively low stiffness of the support structure, and the scenario where the damper cannot be applied due to the need for support devices. In addition to being economical and aesthetically pleasing, it can be arranged at any position on the cable structure 1, which is very advantageous for the low-order vibrations of the cable structure 1. For example, in multi-strand vibration reduction of suspension bridges, wire rope dampers can be placed at higher positions on the cables, which is highly beneficial for low-order vibrations of the cables. In the field of power transmission lines, support devices are often difficult to install, and even if the support devices are fixed to the transmission towers, their stiffness is difficult to guarantee. Permanent magnet wire rope dampers without support devices can completely avoid such situations, which is highly beneficial for controlling wind-induced vibrations of power transmission lines.

[0072] Figure 5 Alternatively, one clamping plate group of the clamping plate unit can hold the cable structure 1, while the other clamping plate group is fixed. For example, one clamping plate group of the clamping plate unit is used to connect the cable structure 1, and the other clamping plate group is connected to the first support. The first support is fixed. In this case, it is not necessary to consider whether the vibration of the cable structure 1 is consistent. As long as the cable structure vibrates, the two clamping plate groups will move relatively closer or further apart. As a result, the spiral structure connected by the two clamping plate groups of the clamping plate unit will form radial compression or tension, generating energy dissipation. This method has more requirements for the support setting, which limits the setting position of the wire rope damper used for the cable structure, such as limiting the setting height of the wire rope damper used for the cable structure on the cable structure 1.

[0073] In this embodiment, as Figure 3-4As shown, the clamping plate assembly includes a first clamping plate 3 and a second clamping plate 4. A through hole 71 is located between the first clamping plate 3 and the second clamping plate 4. The first clamping plate 3 and the second clamping plate 4 are detachably connected by a second anchoring bolt 41. The second clamping plate 4 is located inside the spiral structure, and the first clamping plate 3 is located outside the spiral structure. The side of the first clamping plate 3 away from the second clamping plate 4 is detachably connected to the cable structure 1. Specifically, the side of the first clamping plate 3 away from the second clamping plate 4 has an outward-facing semi-cylindrical groove. The first clamping plate 3 is detachably connected to a connector 2. The side of the connector 2 near the first clamping plate 3 has an inward-facing semi-cylindrical groove. The semi-cylindrical grooves of the first clamping plate 3 and the connector 2 combine to form an installation hole that can be fitted and fixedly connected to the cable structure 1. The semi-cylindrical grooves of the first clamping plate 3 and the connector 2 can be detachably connected by the first anchoring bolt 31, facilitating installation. After the wire rope damper fails, it can be replaced promptly, and disassembly is convenient, reducing maintenance costs.

[0074] The energy dissipation of the vibration of cable structure 1 is achieved by using steel wire ropes. It has a good suppressive effect on the high-frequency vibration of cable structure 1 and also has a certain suppressive effect on the low-frequency vibration of cable structure 1. However, since the traditional steel wire rope damper has a large positive stiffness, it will significantly affect the vibration reduction performance of the steel wire rope damper and reduce the control effect on the vibration of cable structure 1. This solution involves providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between two clamping plate groups in at least one clamping plate unit. The first and / or second permanent magnet type magnetic stiffness elements utilize the magnetic force between the permanent magnets to significantly reduce the normal stiffness of the wire rope damper. For example, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the corresponding two permanent magnets to reduce the normal stiffness of the wire rope 7 under compression when the two clamping plate groups of the clamping plate unit are close together. That is, when the cable structure 1 connecting the two clamping plate groups of the clamping plate unit equipped with the first permanent magnet type magnetic stiffness element vibrates and compresses, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the corresponding two permanent magnets to generate… The force that brings the two clamping plates of the clamping unit closer together can eliminate the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure during compression. The second permanent magnet type magnetic stiffness element can reduce the tensile stiffness of the wire rope 7 when the two clamping plates of the clamping unit move away from each other using the magnetic force of the corresponding two permanent magnets. That is, when the cable structure 1 connected by the two clamping plates of the clamping unit equipped with the second permanent magnet type magnetic stiffness element vibrates and is stretched, the second permanent magnet type magnetic stiffness element can generate a force that moves the two clamping plates of the clamping unit away from each other using the magnetic force of the corresponding two permanent magnets, thereby eliminating the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure 1 during tension. Under the same excitation, after the first permanent magnet type magnetic stiffness element and / or the second permanent magnet type magnetic stiffness element are provided between the two clamping plates of the clamping unit, the vibration reduction performance of the wire rope damper is significantly higher than that of the traditional wire rope damper. The first permanent magnet type magnetic stiffness element can adjust the magnetic force by changing the size of the first permanent magnet 81 and the spacing between the first permanent magnets 81, thereby adapting to wire rope dampers with different parameters. The second permanent magnet type magnetic stiffness element can adjust the magnetic force by changing the size of the second permanent magnet 82 and the spacing between the second permanent magnets 82, thereby adapting to wire rope dampers with different parameters.

[0075] In this scheme, at least one of the clamping plate units is provided with a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element between the two clamping plate groups. That is, the tension and compression generated by the vibration of the cable structure 1 connected by the clamping plate unit can reduce the normal stiffness of the wire rope damper, thereby eliminating the reduction effect of the stiffness of the wire rope damper itself on the vibration reduction performance of the cable structure 1 and improving the control effect on the vibration of the cable structure 1.

[0076] like Figure 1-2As shown, the first permanent magnet type magnetic stiffness element includes two first permanent magnets 81, and the second permanent magnet type magnetic stiffness element includes two second permanent magnets 82. Both the first permanent magnets 81 and the second permanent magnets 82 have two poles. The two first permanent magnets 81 are respectively disposed near two clamping plate groups of the clamping plate unit. The two first permanent magnets 81 are respectively connected and fixed to the clamping plate groups they are adjacent to. A limiting device 5 can be used to fix the first permanent magnets 81 to the corresponding clamping plate groups. The two first permanent magnets 81 have opposing surfaces, and the opposing surfaces of the two first permanent magnets 81 are opposite in poles, i.e. Figure 1 The two first permanent magnets 81 have opposite poles on their adjacent surfaces, such as one having an S pole and the other an N pole. The two clamping plates of the clamping unit move closer together radially along the corresponding spiral structure, which in turn moves the two first permanent magnets 81 closer together. Two second permanent magnets 82 are respectively disposed near the two clamping plates of the clamping unit, and each second permanent magnet 82 is respectively connected and fixed to the clamping plate that is furthest from it. The two second permanent magnets 82 have opposing surfaces, and the opposing surfaces of the two second permanent magnets 82 are at opposite poles. Figure 1 The surfaces of the two second permanent magnets 82 that are close to each other are opposite poles, such as one S pole and the other N pole; the two clamping plates of the clamping unit can drive the two second permanent magnets 82 to approach each other by moving away radially from each other along the corresponding spiral structure.

[0077] When the cable structure 1 vibrates, causing the wire rope damper to compress, the two first permanent magnets 81 move closer together, further increasing their magnetic attraction. This increases the force that pulls the two clamping plates of the clamping unit closer together. Meanwhile, the two second permanent magnets 82, connected to more distant clamping plates, move away from each other, further decreasing their magnetic attraction. This reduces the force that pulls the two clamping plates of the clamping unit further apart, thus lowering the normal stiffness generated by the compression of the wire rope damper. When the cable structure 1 vibrates, causing the wire rope damper to stretch, the two first permanent magnets 81 move away from each other, further reducing the magnetic attraction of the two first permanent magnets 81. This reduces the force that would cause the two clamping plates of the clamping unit to move closer together. Meanwhile, because the two second permanent magnets 82 are connected to the more distant clamping plates, the two second permanent magnets 82 move closer together, further increasing the magnetic attraction of the two second permanent magnets 82. This increases the force that would cause the two clamping plates of the clamping unit to move away from each other, reducing the normal stiffness generated by the stretching of the wire rope damper.

[0078] Specifically, the two second permanent magnets 82 are respectively connected and fixed to the clamping plate assembly located away from them via fixing plates 6; see reference. Figure 7 and Figure 8The fixing plate 6 includes a first fixing plate 61, a second fixing plate 62, and a third fixing plate 63. The first fixing plate 61 and the third fixing plate 63 are respectively disposed near two clamping plate groups of the clamping plate unit. The first fixing plate 61 and the third fixing plate 63 are arranged in parallel. The second fixing plate 62 is perpendicularly connected between the first fixing plate 61 and the third fixing plate 63. The first fixing plate 61 is connected to the clamping plate group it is adjacent to. The second permanent magnet 82 is connected to the third fixing plate 63. The second permanent magnet 82 is located between the two third fixing plates 63. By using the above-mentioned fixing plate 6 to set two second permanent magnets 82, the setting of the two second permanent magnets 82 is more convenient and the connection is more stable. It is beneficial for the two second permanent magnets 82 to reduce the tensile stiffness of the wire rope damper.

[0079] The wire rope damper used in this solution for cable structures transmits the vibration of cable structure 1 to the damper through the clamping plate assembly. When the vibration amplitude of cable structure 1 is large, the damper utilizes the deformation of wire rope 7 to generate friction between the wire strands and bundles, thereby consuming the energy generated by the vibration and reducing the vibration of cable structure 1, preventing its failure from threatening bridge safety and driving comfort. When the vibration amplitude of cable structure 1 is small, the wire rope 7 does not slip relative to each other due to internal friction, and the damper can eliminate the energy generated by the vibration without deformation, achieving the vibration reduction effect. The permanent magnet type magnetic stiffness element counteracts the restoring force of the wire rope damper through the attraction between magnets, reducing the normal stiffness of the damper and significantly improving its energy dissipation capacity. The wire rope 7 dissipates energy from the vibration of the cable structure 1, effectively suppressing high-frequency vibrations. Furthermore, by providing a first permanent magnet type magnetic stiffness element and / or a second permanent magnet type magnetic stiffness element between the two clamping plates of at least one clamping plate unit, the first permanent magnet type magnetic stiffness element utilizes the magnetic force of the corresponding two permanent magnets to generate a force that brings the two clamping plates of the clamping plate unit closer together. This force counteracts the restoring force generated when the wire rope damper is compressed, thereby reducing the normal stiffness of the wire rope damper during compression. This, in turn, allows for... To eliminate the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure 1 during compression, the second permanent magnet type magnetic stiffness element utilizes the magnetic force of the two corresponding permanent magnets to generate a force that moves the two clamping plates of the clamping plate unit away from each other. This force counteracts the restoring force generated when the wire rope damper is stretched, reducing the normal stiffness of the wire rope damper during stretching. This, in turn, eliminates the reduction effect of the wire rope damper's own stiffness on the vibration reduction performance of the cable structure 1 during stretching, allowing the wire rope damper to simultaneously meet the higher vibration control requirements of the cable structure 1. The reduced normal stiffness of the wire rope damper allows for greater deformation of the damper under the same load excitation, resulting in more energy dissipation from the vibration of the cable structure 1 and improving the vibration reduction effect of the wire rope damper.

[0080] Example 2

[0081] This embodiment provides a wire rope damper for cable structures, which differs from Embodiment 1 in that, see [reference needed] Figure 7-9 The two clamping plate groups of the clamping plate unit can each connect to one of the cable structures 1, and the two clamping plate groups of the clamping plate unit are located at different axial heights corresponding to the cable structures 1.

[0082] Using the above arrangement, the two clamping plate assemblies are respectively connected to different heights of the cable structure 1, such as... Figure 10 As shown, this can avoid the small deformation of the wire rope damper when different cable structures 1 move synchronously. By utilizing the different amplitudes of vibration at different heights of cable structure 1, the deformation and energy dissipation capacity of the wire rope damper can be improved, thereby enhancing its vibration reduction performance.

[0083] Example 3

[0084] This embodiment provides a wire rope damper for cable structures, which differs from Embodiment 1 in that, see [reference needed] Figure 12-16 The wire rope damper includes at least two clamping plate units. A first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element are provided between the two clamping plate groups of all the clamping plate units. The clamping plate units are staggered in the circumference of the spiral structure. All the clamping plate groups are used to connect one of the cable structures 1.

[0085] The first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to different clamping plate units are located at different heights of the cable structure 1.

[0086] The above arrangement can be adapted to the vibration reduction and energy dissipation of cable structures 1 with an even number of cables of 4, 6, 8, etc. and greater than or equal to 4. Each clamping plate unit has a corresponding first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element, which can reduce the positive stiffness of compression and tension, so that the vibration reduction and energy dissipation effect of the wire rope damper for both high-frequency and low-frequency vibrations is better, and can simultaneously meet the vibration reduction and energy dissipation requirements of multiple cable structures 1.

[0087] In this embodiment, the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to each clamping plate unit can be located at different heights of the cable structure 1, that is, arranged in rows along the axial direction of the cable structure 1. However, this arrangement requires the clamping plate group of the clamping plate unit to be relatively long. If an even number of wire rope dampers of the cable structure 1, such as 4, 6, or 8, are set, then 2, 3, or 4 clamping plate units, or more than 2, are required. The clamping plate groups of these clamping plate units need to be of equal length, which results in a relatively long clamping plate group, making it inconvenient for installation in the cable structure 1 and for winding and threading the wire rope. In this embodiment, as... Figure 15 As shown, by arranging the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to the clamping plate unit side by side at the same axial height of the cable structure 1, it is possible to avoid setting the clamping plate group of the clamping plate unit too long along the axial length of the cable structure 1, making the arrangement more convenient. At the same time, it is possible to divide the length direction of the cable structure 1 into more control points. The control points can simultaneously use the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element arranged side by side to reduce the positive stiffness of the wire rope damper, and the length of the cable structure corresponding to each control point is shorter, resulting in better control effect.

[0088] Example 4

[0089] This embodiment provides a wire rope damper for cable structures, which differs from Embodiment 3 in that, see [reference needed] Figure 17-19 The wire rope damper includes at least two clamping plate units. Each clamping plate unit has a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element between its two clamping plate groups. The clamping plate units are staggered around the circumference of the spiral structure. All clamping plate groups are used to connect one cable structure 1. With this arrangement, all cable structures 1 connected by clamping plate units can utilize the wire rope damper to effectively dissipate high-frequency vibrations of the cable structure 1. However, only cable structures 1 connected by clamping plate units equipped with the first and second permanent magnet type magnetic stiffness elements can utilize these elements to reduce the positive stiffness of compression and tension in the corresponding directions, thereby achieving better control for cable structures 1 with higher vibration reduction requirements.

[0090] Example 5

[0091] This embodiment provides a vibration damping device for cable structures, including at least two wire rope dampers for cable structures as described in the above embodiments, with all the wire rope dampers for cable structures connected in parallel at different axial heights of the corresponding cable structure 1.

[0092] At least two wire rope dampers for the cable structure can be arranged along the length of the cable structure to compensate for the damping ratio of the failure mode, thereby improving the vibration reduction frequency band of the wire rope dampers and making the vibration reduction effect of the entire vibration reduction device for the cable structure better. Moreover, there is no interference between the first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element between different wire rope dampers for the cable structure, so it is still possible to achieve better control of the high-frequency vibration and low-frequency vibration of the cable structure 1 at the same time.

[0093] like Figure 9-11 The method employs the wire rope dampers for cable structures described in Example 2, which are installed in parallel at different positions along the length of cable structure 1 to prevent mutual interference. Furthermore, the clamping plates connected to one of the two wire rope dampers for cable structures in Example 2 are positioned close together, while the clamping plates connected to the other cable structure 1 are positioned far apart. This prevents different wire rope dampers from exhibiting the same vibration at the same height position on cable structure 1, resulting in better vibration control of cable structure 1.

[0094] like Figure 20-22 The method employs the wire rope dampers used in Embodiment 4 for cable structures, which are installed in parallel at different positions along the length of the cable structure to avoid mutual interference. One wire rope damper, with a clamping unit containing a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element, is connected to two cable structures 1. The other wire rope damper, also with a clamping unit containing a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element, is connected to the other two cable structures 1. This configuration of the cable structure 1 provides better control over both low-frequency and high-frequency vibrations of the four cable structures 1 and compensates for the damping ratio of the failure mode.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wire rope damper for cable structures, characterized in that, The device includes a wire rope (7) and at least one clamping unit. Each clamping unit includes two clamping groups. Each clamping group has several through holes (71) through which the wire rope (7) passes. The wire rope (7) passes through the through holes (71) of the two clamping groups of at least one clamping unit in sequence to form a spiral structure. The two clamping groups of the clamping unit through which the wire rope (7) passes move closer or further away along the radial direction of the corresponding spiral structure, which can cause the wire rope (7) to dissipate energy. At least one clamping group is used to connect the cable structure (1). At least one of the clamping plate units has a first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element provided between the two clamping plate groups. The first permanent magnet type magnetic stiffness element includes two first permanent magnets (81), and the second permanent magnet type magnetic stiffness element includes two second permanent magnets (82). Both the first permanent magnets (81) and the second permanent magnets (82) have two poles. The two first permanent magnets (81) are respectively arranged close to the two clamping plates of the clamping unit. The two first permanent magnets (81) are respectively connected and fixed to the clamping plates that are close to them. The two first permanent magnets (81) have opposing surfaces. The opposing surfaces of the two first permanent magnets (81) have opposite poles. The two clamping plates of the clamping unit can move closer to each other along the radial direction corresponding to the spiral structure, which can drive the two first permanent magnets (81) to move closer. The first permanent magnet type magnetic stiffness element can reduce the positive stiffness of the steel wire rope (7) when the two clamping plates of the clamping unit move closer by using the magnetic force of the two first permanent magnets (81). Two second permanent magnets (82) are respectively disposed close to the two clamping plates of the clamping unit. The two second permanent magnets (82) are respectively connected and fixed to the clamping plates that are far away from them. The two second permanent magnets (82) have opposing surfaces. The opposing surfaces of the two second permanent magnets (82) have opposite poles. The two clamping plates of the clamping unit can drive the two second permanent magnets (82) to move closer together by moving away from each other along the radial direction of the corresponding spiral structure. The second permanent magnet type magnetic stiffness element can reduce the positive stiffness of the wire rope (7) when the two clamping plates of the clamping unit move away from each other by using the magnetic force of the two second permanent magnets (82).

2. The wire rope damper for cable structures according to claim 1, characterized in that, The two second permanent magnets (82) are respectively connected and fixed to the clamping plate assembly located away from them by fixing plates (6); The fixing plate (6) includes a first fixing plate (61), a second fixing plate (62) and a third fixing plate (63). The first fixing plate (61) and the third fixing plate (63) are respectively arranged close to the two clamping plate groups of the clamping plate unit. The first fixing plate (61) and the third fixing plate (63) are arranged in parallel. The second fixing plate (62) is vertically connected between the first fixing plate (61) and the third fixing plate (63). The first fixing plate (61) is connected to the clamping plate group it is close to. The second permanent magnet (82) is connected to the third fixing plate (63). The second permanent magnet (82) is located between the two third fixing plates (63).

3. The wire rope damper for cable structures according to any one of claims 1-2, characterized in that, The clamping plate group is arranged along the axial direction of the cable structure (1), and the through holes (71) of each clamping plate group are spaced apart along the axial direction of the cable structure (1). The spiral structure is arranged between the two clamping plate groups of all the clamping plate units. The angle between the length direction of the spiral structure and the axial direction of the cable structure (1) is greater than or equal to 0° and less than or equal to 30°.

4. The wire rope damper for cable structures according to claim 3, characterized in that, The wire rope damper comprises only one of the aforementioned clamp units; One of the clamping plates of the clamping plate unit is used to connect the cable structure (1), and the other clamping plate unit is connected to the first bracket, the first bracket being fixed; or the two clamping plate groups of the clamping plate unit are respectively connected to one of the cable structures (1).

5. The wire rope damper for cable structures according to claim 4, characterized in that, The two clamping plates of the clamping plate unit can each connect to one of the cable structures (1), and the two clamping plates of the clamping plate unit are located at different axial heights corresponding to the cable structures (1).

6. The wire rope damper for cable structures according to claim 3, characterized in that, The wire rope damper includes at least two clamping plate units. A first permanent magnet type magnetic stiffness element and a second permanent magnet type magnetic stiffness element are provided between the two clamping plate groups of all the clamping plate units. The clamping plate units are staggered in the circumference of the spiral structure. All the clamping plate groups are used to connect one of the cable structures (1). The first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to different clamping plate units are located at different heights of the cable structure (1).

7. The wire rope damper for cable structures according to claim 6, characterized in that, The first permanent magnet type magnetic stiffness element and the second permanent magnet type magnetic stiffness element corresponding to the clamping plate unit are arranged side by side at the same axial height of the cable structure (1).

8. The wire rope damper for cable structures according to any one of claims 1-2, characterized in that, The wire rope damper includes only one clamping unit. The two clamping groups of the clamping unit are both annular. The axial direction of the clamping group is the same as the axial direction of the cable structure (1). The two clamping groups are arranged in inner and outer circles. There is a gap between the two clamping groups. The wire rope (7) is passed between the two clamping groups to form the spiral structure. The length direction of the spiral structure is the same as the circumferential direction of the clamping group. One of the clamping plates of the clamping plate unit is used to connect the cable structure (1), and the other clamping plate unit is used to connect the second bracket, the second bracket being fixed; or the two clamping plates of the clamping plate unit are respectively connected to one of the cable structures (1).

9. A vibration damping device for cable structures, characterized in that, Includes at least two wire rope dampers for cable structures as described in any one of claims 1-8, all of which are connected in parallel at different axial heights of the corresponding cable structure (1).

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