Temporary cable damping device for cable-stayed bridge construction and mounting method of temporary cable damping device

Abstract

The invention discloses a temporary inhaul cable vibration reduction device for cable-stayed bridge construction and an installation method thereof.The vibration reduction device comprises a cable clamp arranged on a stay cable in a sleeving mode, a supporting base supported on a main beam and a vibration reduction device body with the two ends hinged to the cable clamp and the supporting base respectively, and the vibration reduction device body is connected and installed through the supporting base and the cable clamp; vibration of the stay cable is transmitted to the vibration reduction device, vibration reduction is achieved through the vibration reduction device, the vibration reduction device converts linear vibration of the stay cable into rotation of the structure, and therefore vibration reduction is achieved. The wind-induced vibration response of the stay cable in the construction process of the cable-stayed bridge can be reduced, and the safety coefficient of cable-stayed bridge construction is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable-stayed bridge construction, and more particularly to a temporary cable vibration reduction device for cable-stayed bridge construction and an installation method thereof. Background Art

[0002] Cable-stayed bridges, due to their excellent spanning capacity, are widely used to cross large rivers, straits, and canyons. Construction environments such as straits and canyons are complex and prone to strong winds. Cable-stayed bridges, with their lightweight structures and large spans, are highly sensitive to wind loads. Wind-induced loads can cause deformation and vibration in structural components such as the main beams, towers, and cables. Cables, in particular, experience strong vibrations under wind loads due to their light weight, flexible stiffness, and low damping. During the construction phase of a cable-stayed bridge, when the structure is not yet fully formed and its overall stiffness is low, wind-induced vibrations in the cables can be even more intense. Strong cable vibrations can cause damage to anchorage areas and, in severe cases, even fatigue fracture. During cable-stayed bridge construction, significant cable vibrations can severely impact the normal operation of construction workers and equipment, increasing safety risks and potentially causing physical and psychological harm to workers. Therefore, controlling cable vibration during cable-stayed bridge construction in environments subject to frequent strong winds is essential.

[0003] Currently, common methods for reducing vibrations in cable-stayed bridges during construction include using auxiliary cables at the cable ends to suppress vibrations, inserting wooden blocks into cable sleeves to suppress vibrations, and adding dampers. The cost of using multiple auxiliary cables at the cable ends is high, and the rigid connections between the auxiliary cables and the cable stays are easily damaged. As a traditional vibration-damping material, wooden blocks have a relatively limited vibration-damping effect, and they tend to loosen during vibration, ultimately losing their vibration-damping ability. Common vibration-damping dampers for cable stays include liquid viscous dampers and rubber dampers, which have also been found to have many shortcomings during use. Traditional dampers experience mechanical friction and loss during the vibration-damping process, and liquid dampers are prone to oil leakage, resulting in poor durability and high maintenance costs. Summary of the Invention

[0004] An object of the present invention is to provide a temporary cable vibration reduction device for cable-stayed bridge construction and an installation method thereof, which can reduce the wind-induced vibration response of the cable during cable-stayed bridge construction and improve the safety factor of cable-stayed bridge construction.

[0005] In order to solve the above technical problems, the present invention provides a temporary cable vibration reduction device for cable-stayed bridge construction, including a cable clamp mounted on the cable, a support base supported on the main beam, and a vibration reduction device hinged to the cable clamp and the support base at both ends. The vibration reduction device is connected and installed through the support base and the cable clamp. The vibration of the cable is transmitted to the vibration reduction device and vibration reduction is achieved through the vibration reduction device. The vibration reduction device converts the linear vibration of the cable into rotation of the structure, thereby achieving vibration reduction.

[0006] Preferably, the vibration damping device includes a first connecting ear plate, a second connecting ear plate, an outer wall arranged between the first connecting ear plate and the second connecting ear plate, and a transmission rod, the first connecting ear plate is hinged to the cable clamp, the second connecting ear plate is hinged to the support base, the second connecting ear plate is fixedly connected to the outer wall, one end of the transmission rod is connected to the first connecting ear plate, and the other end is connected to the outer wall on the second connecting ear plate through a spring.

[0007] Preferably, an outer wall is also provided on the transmission rod at the first connecting ear plate, and a pair of side walls are fixedly connected on both sides of the pair of outer walls. A plurality of limit blocks are correspondingly provided on the inner side walls of the side walls, which are used to limit the movement of the transmission rod along the linear direction of the spring extension and contraction, and the transmission rod slides through the outer wall corresponding to the first connecting ear plate.

[0008] Preferably, there are four transmission rods, and the ends of any two of them are connected to form a whole by connecting plates, two groups of transmission rods are arranged relatively parallel and correspondingly connected to two springs, an outer wall is also provided on the transmission rod at the first connecting ear plate, and a pair of side walls are fixedly connected on both sides of the pair of outer walls, the transmission rod slides through the outer walls corresponding to the first connecting ear plate, and gears are provided in the middle of the two groups of transmission rods, which are respectively connected by rotating shafts on a pair of side walls, and racks are provided on the two groups of transmission rods, and the racks are respectively arranged on the upper transmission rod and the lower transmission rod and mesh with the corresponding gears, and a pair of rotating shafts are respectively fixed with metal conductor disks and magnet disks, which are arranged relatively parallel and located between the two groups of rotating rods, and a plurality of permanent magnets are provided on the side walls of the magnet disk facing the metal conductor disk.

[0009] Preferably, the ends of a pair of rotating shafts located between the metal conductor disk and the magnet disk are both rotatably sleeved with rotating wheels, and the outer walls of the pair of rotating wheels are fixedly connected to the inner wall of a sleeve.

[0010] Preferably, the plurality of permanent magnets are evenly spaced along the circumference of the magnet disk and are arranged in an even number, and a pair of rotating shafts are respectively passed through the centers of the metal conductor disk and the magnet disk, and simultaneously pass through the centers of a pair of side walls.

[0011] Preferably, the cable clamp includes a pair of outer clamps arranged opposite to each other, which are sleeved on the inclined cable, and the ends of the pair of outer clamps are fastened by bolts so that the pair of outer clamps are tightly clamped on the inclined cable, and a connecting plate is vertically provided on one of the outer clamps, which is used to be hinged to the vibration reduction device, and the inner walls of the pair of outer clamps are fixedly provided with buffer rubber pads.

[0012] Preferably, the support base includes a support bottom plate fixed on the main beam and a support column fixed on the support bottom plate. The support column is hollow inside and has a plurality of threaded holes spaced apart along the longitudinal direction. A sliding column is provided in the support column for vertical sliding cooperation, and a plurality of threaded holes are also spaced apart along the longitudinal direction. The support column corresponds to any pair of threaded holes on the sliding column and is connected by bolts to adjust the height of the support base.

[0013] Preferably, the support base and the vibration damping device are connected by a connecting assembly, one end of the connecting assembly is a pair of parallel vertical steel plates with holes arranged opposite to each other, which are hinged to the connecting holes at the top of the sliding column, and the other end of the connecting assembly is a horizontal steel plate with holes perpendicular to the vertical steel plates, which is hinged to the vibration damping device.

[0014] The present invention also provides a method for installing a temporary cable vibration reduction device for cable-stayed bridge construction, comprising the following steps: Step 1: Install the cable clamp at the corresponding height of the cable according to the design requirements; Step 2: Install the support base according to the angle of the inclined cable and the position of the cable clamp, and adjust it to the appropriate height designed; Step 3: Install the vibration reduction device between the cable clamp and the support base. After installation, the vibration reduction device forms a 90° angle with the inclined cable.

[0015] The present invention has at least the following beneficial effects: 1) This invention utilizes a vibration damping device to convert the vibration of the stay cable into rotation of a flywheel (conductor disk and magnet disk), which in turn generates eddy current damping, thereby achieving vibration reduction. Compared to traditional methods of installing auxiliary cables at the ends of stay cables and inserting wooden blocks into the cable sleeves, this invention offers advantages such as zero friction loss, excellent durability, superior vibration reduction, and self-resetting.

[0016] 2) This invention features a simple overall structure. By employing a cable clamp, a vibration damping device, a connecting assembly, and a support base, it achieves vibration damping for the stay cables during construction. The incorporation of a liftable support column and a rotatable connecting assembly allows for installation of the vibration damping device at various angles, enhancing the suitability of temporary vibration damping devices for installation during stay cable construction. The reinforced steel plate increases the rigidity of the support base, effectively supporting the vibration damping device and improving the vibration damping effect.

[0017] 3) The vibration reduction device of this invention has a dual vibration reduction effect. On the one hand, the transmission rod, rack, and gear convert the vibration of the cable into rotation of the flywheel (conductor disk and magnet disk), achieving a capacitive damping effect. On the other hand, the interaction between the conductor disk and the magnet disk realizes eddy current damping. Furthermore, by reversing the relative positions of the rack and gear of the two transmission components, the conductor disk and the magnet disk rotate in opposite directions, amplifying the relative rotation speed and increasing the relative speed at which the conductor cuts through the magnetic flux lines, achieving a double eddy current damping effect and achieving excellent vibration reduction for the cable. The device's excellent vibration reduction effect ensures the quality of bridge construction and improves the safety of construction workers.

[0018] 4) The relative rotational speed of the conductor disk and the magnet disk of the present invention is related to the vibration speed of the transmission rod, which means that the magnitude of the eddy current damping of the vibration reduction device is related to the vibration speed of the cable. The damping force of the eddy current damping effect of the vibration reduction device provided by the present invention can be adaptively changed with the vibration response of the cable, effectively ensuring the vibration suppression requirements of the cable under wind-induced vibration conditions of different intensities at different construction sites, and ensuring the vibration reduction effect of the cable during the construction of the cable-stayed bridge.

[0019] 5) The damping of the vibration reduction device of the present invention comes from the eddy current damping generated by the relative rotation of the conductor disk and the magnet disk. Compared with traditional mechanical friction energy consumption, liquid viscosity energy consumption, and structural deformation energy consumption, there is no friction loss, no damage to the structure, good durability, and can be reused in multiple cable-stayed bridge construction projects, reducing construction costs.

[0020] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation of the vibration reduction device of the present invention; Figure 2 Schematic diagram of the cable clamp of the present invention; Figure 3 A schematic diagram of a support base of the present invention; Figure 4 is a schematic diagram of a connection assembly of the present invention; Figure 5 Schematic diagram a of the vibration reduction device of the present invention; Figure 6 is a schematic diagram of a connection kit of the present invention; Figure 7 Schematic diagram b of the vibration reduction device of the present invention.

[0022] Description of reference numerals: 1. Main beam, 2. Stay cable, 3. Cable clamp, 4. Vibration damping device, 5. Support base, 6. Connection assembly; 31. External clamp, 32. Buffer rubber pad, 33. Connecting plate, 34. Stiffening plate, 35. Connecting bolts; 41. Side wall, 411. Roller, 421. First connecting ear plate, 422. Second connecting ear plate, 43. Transmission rod, 44. Rotating assembly, 441. Rack, 442. Gear, 443. Rotating shaft, 444. Limit block, 45. Outer wall, 46. Connecting kit, 461. Sleeve, 462. Rotating wheel, 47. Metal conductor disk, 48. Magnetic disk, 481. Permanent magnet, 49. Spring; 51. Bottom plate, 52. Reinforcement steel plate, 53. Support column, 54. Sliding column, 55. Connection hole; 61. Horizontal steel plate, 62. Vertical steel plate. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below with reference to the accompanying drawings so that those skilled in the art can implement it according to the description.

[0024] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] like Figure 1 As shown, the present invention provides a temporary cable vibration reduction device for cable-stayed bridge construction, comprising a cable clamp sleeved on the cable, a support base supported on the main beam, and a vibration reduction device hinged to the cable clamp and the support base at both ends. The vibration reduction device is connected and installed through the support base and the cable clamp, and the vibration of the cable is transmitted to the vibration reduction device and vibration reduction is achieved through the vibration reduction device. The vibration reduction device converts the linear vibration of the cable into rotation of the structure, thereby achieving vibration reduction.

[0026] The structure mainly includes a stay cable 2, a main beam 1, a cable clamp 3, a vibration reduction device 4, a support base 5, and a connection assembly 6.

[0027] like Figure 2As shown, the cable clamp comprises a pair of opposing outer clamps that are mounted on the stay cable. The ends of the outer clamps are bolted together to secure the clamps to the stay cable. A connecting plate is vertically mounted on one of the outer clamps, which is hingedly connected to the vibration damping device. A cushioning rubber pad is fixedly mounted on the inner wall of each outer clamp. The cable clamp 3 comprises an outer clamp 31, a cushioning rubber pad 32, a perforated connecting plate 33, a stiffening plate 34, and connecting bolts 35. The connecting plate 33, stiffening plate 34, and outer clamp 31 are welded perpendicularly to each other. The stiffening plate 34 strengthens the connection between the connecting plate 33 and the outer clamp 31. The connecting plate 33 is hingedly connected to the first connecting lug 421 of the vibration damping device.

[0028] like Figure 3 As shown, the cable clamp includes a pair of opposing outer clamps that are mounted on the diagonal cable. The ends of the pair of outer clamps are fastened with bolts to ensure that the pair of outer clamps are tightly attached to the diagonal cable. A connecting plate is vertically mounted on one of the outer clamps, which is used to hinge with the vibration reduction device. The inner walls of the pair of outer clamps are fixed with buffer rubber pads. The support base is composed of a support base plate 51, a reinforcing steel plate 52, a support column 53, and a sliding column 54. The support base plate 51 is connected to the main beam 1 by bolts. The reinforcing steel plates 52 are arranged on opposite sides of the support column to improve the bending resistance and stability of the support column 53. The sliding column 53 can slide within the support column 53 and is fixed in position by horizontal bolts, thereby improving the installation adaptability of the temporary vibration reduction device 4. A connecting hole 55 is provided at the top of the sliding column 54 for hinged connection to the vibration reduction device.

[0029] like Figure 4 As shown, the support base and the vibration damping device are connected via a connecting assembly, one end of which is a pair of parallel vertical steel plates with holes arranged opposite to each other, which are hinged to the connecting hole at the top of the sliding column, and the other end of the connecting assembly is a horizontal steel plate with holes perpendicular to the vertical steel plates, which is hinged to the vibration damping device. The connecting assembly 6 is composed of three steel plates with holes, one end of which is two parallel vertical steel plates with holes 62, and the other end is a horizontal steel plate with holes 61 perpendicular to them, and the three steel plates have overlapping parts, thereby improving the strength of the connecting assembly. Among them, the vertical steel plate with holes 62 at one end of the connecting assembly is hinged to the connecting hole 55 of the sliding column 54, and the horizontal steel plate with holes at the other end is hinged to the vibration damping device 4. The connecting assembly 6 can adapt to different installation angles of the vibration damping device 4, thereby improving the applicability of the temporary vibration damping device.

[0030] like Figures 5 to 7 As shown, the vibration damping device includes a first connecting ear plate, a second connecting ear plate, an outer wall arranged between the first connecting ear plate and the second connecting ear plate, and a transmission rod. The first connecting ear plate is hinged to the cable clamp, the second connecting ear plate is hinged to the support base, and the second connecting ear plate is fixedly connected to the outer wall. One end of the transmission rod is connected to the first connecting ear plate, and the other end is connected to the outer wall on the second connecting ear plate through a spring.

[0031] An outer wall is also provided on the transmission rod at the first connecting ear plate, and a pair of side walls are fixedly connected to both sides of the pair of outer walls. A plurality of limit blocks are correspondingly provided on the inner side walls of the side walls, which are used to limit the movement of the transmission rod along the linear direction of the spring extension and contraction. The transmission rod slides through the outer wall corresponding to the first connecting ear plate.

[0032] Four transmission rods are provided, and the ends of any two of them are connected by a connecting plate to form a whole. Two sets of transmission rods are arranged in parallel with each other and are correspondingly connected to two springs. A gear is provided in the middle of each set of transmission rods, which are respectively connected by rotating shafts on a pair of side walls. Both sets of transmission rods are provided with racks, and the racks are respectively provided on the upper transmission rod and the lower transmission rod and mesh with corresponding gears. A metal conductor disk and a magnet disk are respectively fixedly provided on the pair of rotating shafts, which are arranged in parallel with each other and located between the two sets of rotating rods. A plurality of permanent magnets are provided on the side walls of the magnet disk facing the metal conductor disk. The plurality of permanent magnets are evenly spaced along the circumference of the magnet disk and the number of permanent magnets provided is even. A pair of rotating shafts are respectively provided through the centers of the metal conductor disk and the magnet disk, and also through the centers of the pair of side walls.

[0033] like Figure 6 As shown, the left and right sides are respectively the assembly diagram and the explosion diagram of the connection kit. A pair of rotating shafts are located between the metal conductor disk and the magnetic disk, and the ends thereof are both rotatably sleeved with rotating wheels, and the outer walls of the pair of rotating wheels are fixedly connected to the inner wall of a sleeve.

[0034] The vibration damping device has a first connecting lug 421 hingedly connected to the cable clamp 3 at one end, and a second connecting lug 422 hingedly connected to the support base 5 at the other end. The cable clamp 3 is sleeved with the stay cable 2, and the support base 5 is bolted to the main beam 1. The first connecting lug 421, connected to the cable clamp 3, is secured to the vibration damping device's transmission rod 43. The vibration damping device comprises two rotating assemblies 44, each consisting of a matching rack 441, a gear 442, a rotating shaft 443, and a transmission rod stopper 444. The gear 442 is secured to the rotating shaft 443. One end of the transmission rod 43 passes through the device's outer wall 45 and is secured to the first connecting lug 421. The other end is connected to the device's outer wall at the other end via a restoring spring 49. A circular hole is defined in the device's side wall 41, within which a roller 411 is positioned. The outer wall of the roller 411 is secured to the hole, while the inner wall of the roller 411 is connected to the rotating shaft 443 of the rotating assembly, providing support for the rotating shaft 443. The limit blocks 444 are fixed to the side wall 41 of the device and are symmetrically arranged above and below the rotating rod. The limit blocks 444 ensure that the rack 441 can effectively contact the gear 442, thereby ensuring that the transmission rod 43 can effectively drive the gear 442 to rotate.

[0035] The rotating shafts 443 of the two rotating assemblies 44 in the device are connected by a connecting sleeve 46. This connecting sleeve 46 consists of two rotating wheels 462 and a sleeve 461. The inner walls of the rotating wheels 462 are connected to the rotating shafts 443, while the outer walls of the rotating wheels 462 are fixed to the inner wall of the sleeve 461. One end of each rotating shaft 443 is supported by the corresponding device side wall 41, and the other end is connected by the connecting sleeve 46, ensuring that the two rotating shafts 443 can rotate freely within the device. The racks 441 on the transmission rods 43 of the two rotating assemblies 44 are positioned opposite to the gears 442. When the transmission rods 43 move, the gears 442 and rotating shafts 443 of the two rotating assemblies rotate in opposite directions. A metal conductor disk 47 and a magnetic disk 48 are respectively mounted on the two rotating shafts. The magnetic disk 48 is equipped with a regularly arranged permanent magnet 481.

[0036] By adopting the above technical solution, under the action of wind load, the vibration of the cable 2 will drive the transmission rod 43 to move, causing the conductor disk 47 and the magnet disk 48 in the vibration damping device 4 to rotate relative to each other. On the one hand, the rack and pinion mechanism converts the translational motion of the cable 2 into rotation of the conductor disk 47 and the magnet disk 48, exerting the effect of an inertial damper. On the other hand, the conductor cuts the magnetic flux lines, generating eddy currents, thereby achieving a vibration reduction effect. In addition, when the cable 2 vibrates, the restoring spring 49 provides a certain damping force for the cable 2, and when vibration stops, it provides a restoring force for the transmission rod 43. The conductor disk 47 is made of a metal material with good electrical conductivity, and in this embodiment, electrical copper is used. The magnet disk 48 is made of a material with good magnetic conductivity, and in this embodiment, low-carbon steel is used. The permanent magnet can be a rare earth permanent magnet with high and stable magnetic properties, and in this embodiment, neodymium iron boron is used. In addition, the number of permanent magnets 481 on the magnet disk 48 is preferably an even number, and the directions of the magnetic poles of two adjacent permanent magnets are ensured to be opposite, so as to achieve the shortest magnetic circuit.

[0037] The present invention also provides a method for installing a temporary cable vibration reduction device for cable-stayed bridge construction, comprising the following steps: 1) Install the cable clamp 3: Install the cable clamp 3 at the corresponding height of the cable as required. To better protect the cable 2, add a layer of buffer rubber 32 to the inner wall of the cable clamp. Tighten the cable clamp connecting bolts 35 to ensure the connection quality between the cable clamp 3 and the cable 2.

[0038] 2) Install the support base 5: According to the angle of the inclined cable 2 and the position of the cable clamp 3, fix the support base plate 51 and adjust the height of the sliding column 54 to the designed appropriate height, and tighten the horizontal bolts between the sliding column 54 and the support column 53.

[0039] 3) Install the vibration damping device 4: Hinge the first connecting lug 421 on one end of the device's transmission rod 43 to the connecting plate 33 of the cable clamp 3. Hinge the second connecting lug 422 on the other end of the device to the horizontal steel plate 61 on one end of the connecting assembly. Hinge the vertical steel plate 62 on the other end of the connecting assembly to the connecting hole 55 on the sliding post. After installation, the vibration damping device 4 should form a 90° angle with the inclined cable 2.

[0040] It will be understood that the present invention is described by way of some embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and embodiments. They can be fully applied to various fields suitable for the present invention, and further modifications can be easily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A temporary cable vibration reduction device for cable-stayed bridge construction, characterized in that: It includes a cable clamp mounted on the inclined cable, a support base supported on the main beam, and a vibration reduction device with both ends hinged to the cable clamp and the support base respectively. The vibration reduction device is connected and installed through the support base and the cable clamp. The vibration of the inclined cable is transmitted to the vibration reduction device and vibration reduction is achieved through the vibration reduction device. The vibration reduction device converts the linear vibration of the inclined cable into rotation of the structure, thereby achieving vibration reduction.

2. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 1, characterized in that: The vibration damping device includes a first connecting ear plate, a second connecting ear plate, an outer wall arranged between the first connecting ear plate and the second connecting ear plate, and a transmission rod. The first connecting ear plate is hinged to the cable clamp, the second connecting ear plate is hinged to the support base, the second connecting ear plate is fixedly connected to the outer wall, one end of the transmission rod is connected to the first connecting ear plate, and the other end is connected to the outer wall on the second connecting ear plate through a spring.

3. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 2, characterized in that: An outer wall is also provided on the transmission rod at the first connecting ear plate, and a pair of side walls are fixedly connected to both sides of the pair of outer walls. A plurality of limit blocks are correspondingly provided on the inner side walls of the side walls, which are used to limit the movement of the transmission rod along the linear direction of the spring extension and contraction. The transmission rod slides through the outer wall corresponding to the first connecting ear plate.

4. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 2, characterized in that: There are four transmission rods, and the ends of any two of them are connected to form a whole through a connecting plate. The two groups of transmission rods are arranged relatively parallel and correspondingly connected to two springs. An outer wall is also provided on the transmission rod at the first connecting ear plate, and a pair of side walls are fixedly connected on both sides of the pair of outer walls. The transmission rod slides through the outer walls corresponding to the first connecting ear plate. Gears are provided in the middle of the two groups of transmission rods, which are connected by rotating shafts on a pair of side walls. Racks are provided on the two groups of transmission rods, and the racks are respectively provided on the upper transmission rod and the lower transmission rod and mesh with the corresponding gears. Metal conductor disks and magnet disks are fixedly provided on a pair of rotating shafts, which are arranged relatively parallel and located between the two groups of rotating rods. A plurality of permanent magnets are provided on the side walls of the magnet disk facing the metal conductor disk.

5. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 4, characterized in that: The ends of a pair of rotating shafts located between the metal conductor disk and the magnet disk are both rotatably sleeved with rotating wheels, and the outer walls of the pair of rotating wheels are fixedly connected with the inner wall of a sleeve.

6. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 4, characterized in that: A plurality of permanent magnets are evenly spaced and arranged along the circumference of the magnet disk, and the number of the permanent magnets is even. A pair of rotating shafts respectively pass through the centers of the metal conductor disk and the magnet disk, and pass through the centers of a pair of side walls at the same time.

7. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 1, characterized in that: The cable clamp includes a pair of outer clamps arranged opposite to each other, which are sleeved on the inclined cable. The ends of the pair of outer clamps are fastened by bolts so that the pair of outer clamps are tightly clamped on the inclined cable. A connecting plate is vertically provided on one of the outer clamps, which is used to be hinged with the vibration reduction device. The inner walls of the pair of outer clamps are fixedly provided with buffer rubber pads.

8. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 1, characterized in that: The support base includes a support bottom plate fixed on the main beam and a support column fixed on the support bottom plate. The support column is hollow inside and has multiple threaded holes spaced apart along the longitudinal direction. A sliding column is vertically slidably fitted inside the support column, and multiple threaded holes are also spaced apart along the longitudinal direction. The support column corresponds to any pair of threaded holes on the sliding column and is connected by bolts to adjust the height of the support base.

9. The temporary cable vibration reduction device for cable-stayed bridge construction according to claim 8, characterized in that: The support base and the vibration damping device are connected by a connecting assembly. One end of the connecting assembly is a pair of parallel vertical steel plates with holes arranged opposite to each other, which are hinged to the connecting holes at the top of the sliding column. The other end of the connecting assembly is a horizontal steel plate with holes perpendicular to the vertical steel plates, which is hinged to the vibration damping device.

10. The method for installing a temporary cable vibration reduction device for cable-stayed bridge construction according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Install the cable clamp at the corresponding height of the cable according to the design requirements; Step 2: Install the support base according to the angle of the inclined cable and the position of the cable clamp, and adjust it to the appropriate height designed; Step 3: Install the vibration reduction device between the cable clamp and the support base. After installation, the vibration reduction device forms a 90° angle with the inclined cable.

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