Suspender system for a suspension bridge

Abstract

The application discloses a suspension bridge sling support type damping system, which comprises two subsystems of a damping damping system and a frequency modulation damping system; the support type damping system comprises a rigid support, a frequency modulation mass element, a threaded rod, viscous liquid, an elastic buffer tank, a supporting spring, a base, a side plate, a rigid support branch, a spherical hinge and a support end plate; a plurality of slings are connected through a sling separator; the rigid support is connected with the sling separator through the support end plate and is smoothly connected to the rigid support branch, the threaded rod is extended on the branch to install the frequency modulation mass element, and high-frequency vibration of the sling is controlled; the rigid support is fixed to the bottom plate of the elastic buffer tank through the spherical hinge and rotates around the spherical hinge to dissipate energy; the tank body is provided with a cover plate to prevent the viscous liquid in the tank body from leaking out; the side plate is connected to the support and is immersed in the viscous liquid; and the supporting spring provides additional rigidity for the rigid support. The application can effectively control wind-induced vibration of the sling, is convenient to install and maintain, and saves manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering, and in particular to a suspension bridge cable-stayed vibration reduction system. Background Technology

[0002] A suspension bridge is a bridge structure in which cables, suspended from towers and anchored to both banks, serve as the main load-bearing components of the superstructure. Due to their aesthetic appeal and exceptional spanning capacity, they are one of the most common types of modern long-span bridges. Currently, some ultra-long-span suspension bridges have spans exceeding 2000 meters. For example, the 1915 Chatkale Bridge, which opened in 2022, has a main span of 2023 meters; the under-construction Shiziyang Channel has a main span of 2180 meters; and the under-construction Zhangjinggao River Crossing Channel even reaches a main span of 2300 meters. For suspension bridges, the suspenders are a crucial component of the load transmission path, connecting the upper main cable and the lower main girder. Therefore, safe and reliable suspenders are essential for the normal operation of a suspension bridge. However, due to the inherent characteristics of suspenders—low damping, small mass, low frequency, and high slenderness ratio—they are highly susceptible to frequent and large-amplitude vibrations under wind loads, and may even experience cable-to-cable contact. These phenomena may lead to a decline in the fatigue performance of the suspension cables and, due to the anchorage failure of the cable clamps at both ends, reduce the long-term service performance of the suspension bridge. This indicates that the emergence of ultra-long-span suspension bridges places increasingly higher demands on the wind-induced vibration control of the suspension cables.

[0003] Currently, the main methods for controlling sling vibration include installing rigid damping frames between the cables, installing high-energy-consuming rubber dampers between the cables, and installing dampers at the beam ends of the sling main beam. Among these, installing rigid damping frames between the cables is one of the simplest control methods and can effectively prevent cable collisions, but its control capability is limited because it has no additional damping energy dissipation capacity. While installing high-energy-consuming rubber dampers between the cables can provide sufficient additional damping, their material durability is poor, they are easily damaged, and require frequent replacement. Dampers installed at the beam ends generally have a starting displacement, making them ineffective for small but high-frequency vibrations. Furthermore, the first two control methods carry the risk of the control device falling off, and dampers installed at the beam ends require a higher installation position to achieve ideal control effects. Additionally, the control effect on the upper end of ultra-long slings remains to be tested.

[0004] In summary, there is an urgent need for a new suspension cable vibration reduction and control system that can effectively control the wind vibration of suspension bridge cables over a long period of time, with good system durability and the ability to control the vibration of multiple modes of the cables. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a suspension bridge cable support type vibration reduction system, which can effectively control the wind-induced vibration of the suspension cables.

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

[0007] A suspension bridge cable-stayed vibration reduction system, the corresponding main structure of the suspension bridge includes a main beam, cables, cable clamps and cable separators. The suspension bridge cables are connected to the main beam. Each set of cables includes two or more parallel multi-strand cables. The multi-strand cables are connected by cable separators. The cables are connected to the main beam by cable clamps.

[0008] The vibration reduction system includes a damping vibration reduction system and a frequency modulation vibration reduction system. The damping vibration reduction system includes a rigid support, a viscous liquid, an elastic buffer tank, a support spring, a base, a ball joint, and a support end plate. The base is fixedly installed above the main beam and is connected to the surface of the main beam for fixation. The elastic buffer tank is placed above the base and fixed to the base by the support spring. The viscous liquid is placed inside the elastic buffer tank. One end of the rigid support is bolted to the sling separator through the support end plate, and the other end is immersed in the elastic buffer tank containing the viscous liquid and fixed in the tank body by the ball joint. The rigid support is also provided with a corner, and a rigid support branch is provided at the corner near the elastic buffer tank.

[0009] The frequency-modulated vibration reduction system includes a threaded rod and a frequency-modulated mass element. One end of the threaded rod is connected to a rigid support branch, and the frequency-modulated mass element passes through the threaded rod to control high-frequency vibration.

[0010] As a preferred technical solution of the present invention: the body of the elastic buffer box includes a bottom plate and a side wall plate, both of which are hollow structures, and the interior of the base and the side wall plate are filled with elastic filler.

[0011] As a preferred technical solution of the present invention: a top plate is installed above the elastic buffer box, the rigid bracket passes through the top plate and is immersed in the viscous liquid, and is fixed to the bottom plate of the elastic buffer box by a ball joint, and a spring fixing seat is provided on the base, one end of the supporting spring is connected to the top plate, and the other end is fixed to the spring fixing seat.

[0012] As a preferred embodiment of the present invention: four support springs are provided, and the four support springs are symmetrically fixed at the four corners of the top plate.

[0013] As a preferred technical solution of the present invention: a spherical groove is provided on the bottom plate of the elastic buffer box, and a ball joint is installed at the bottom of the rigid bracket. The rigid bracket is fixed by being engaged in the spherical groove through the ball joint.

[0014] As a preferred embodiment of the present invention, the angle between the supporting spring and the side wall of the elastic buffer box is in the range of 5 to 15°.

[0015] As a preferred embodiment of the present invention: the rigid support is further provided with a side plate for increasing the contact area with the viscous liquid, increasing the damping force generated by the relative motion with the viscous liquid, and reducing the vibration of the rigid support and the sling connected thereto, the side plate being located inside the viscous liquid.

[0016] In the above structure: the suspension bridge cable-stayed vibration reduction system proposed in this invention corresponds to a main suspension bridge structure including a main beam, cables, cable clamps, and cable separators. The vibration reduction system includes a damping vibration reduction system and a frequency-tuned vibration reduction system. The damping vibration reduction system includes a rigid support, a viscous fluid, an elastic buffer box, a support spring, a base, a ball joint, and a support end plate. The frequency-tuned vibration reduction system includes a threaded rod and a frequency-tuned mass element.

[0017] The rigid support is bolted to the sling separator via the support end plate. It undergoes two beveled angles at a preset position, thus forming a corner on the rigid support. The corner near the elastic buffer box extends vertically downward and is immersed in the elastic buffer box containing viscous liquid, and is fixed by a ball joint. The elastic buffer box is connected to the base, and the base is fixed to the surface of the main beam.

[0018] The bottom plate and side wall plates of the elastic buffer box are filled with elastic filler. The side wall plates provide material stiffness for the elastic buffer box, and the elastic filler inside provides elastic deformation performance, which has an energy dissipation effect and does not completely restrict the rotation of the rigid support. The viscous liquid in the elastic buffer box dissipates the vibration energy of the rigid support and the slings connecting the rigid support through relative movement with the rigid support and side plates, thereby achieving vibration reduction.

[0019] Multiple support springs are used to provide additional stiffness to the elastic buffer box, ensuring that the overall stiffness of the system is met and the overall deformation is controllable. Four support springs are provided, located at the four corners of the elastic buffer box. The angle between the support springs and the vertical direction of the elastic buffer box is 5 to 15°, which can simultaneously limit the vertical and lateral deformation of the system.

[0020] By constructing a function of the manufacturing cost C of the suspension bridge cable-stayed vibration damping system with respect to the mass M of the materials used in each subsystem, the optimal component parameters of the suspension bridge cable-stayed vibration damping system are obtained. The design parameters of the suspension bridge cable-stayed vibration damping system include: material unit mass price w1, material density ρ1, cross-sectional area A1 of the rigid support and threaded rod, total length L1, material unit mass price w2, material density ρ2 of the internal filling of the elastic buffer box, material unit area price w3, material surface density ρ3 of the elastic buffer box shell, length L2, height H2, width D2 of the elastic buffer box, length L3, height H3, width D3 of the internal space of the elastic buffer box, material unit mass price w4, material density ρ4 of the viscous liquid, volume V4 of the viscous liquid, material unit mass price w5, material density ρ5 of the base, base shape area Ω5, base height H5, material unit mass price w6, material density ρ6 of the frequency-modulated mass element, and mass block volume V6. Assuming the costs of supporting springs, various connectors, ball joints, side plates, and other components are negligible, and the thickness of the elastic buffer tank's outer shell is ignored, the mass M of the bracket-type vibration damping system is defined as follows: rigid support mass M1, internal filling mass of the elastic buffer tank M2, outer shell mass of the elastic buffer tank M3, viscous liquid mass M4, base mass M5, and frequency modulation element mass M6. Then, the manufacturing cost C of the bracket-type vibration damping system is expressed as a function of the system's mass M:

[0021] min C={w1M1, w2M2, w3M3, w4M4, w5M5, w6M6}

[0022] in:

[0023] M1=ρ1A1L1

[0024] M2=ρ2(L2H2D2-L1H1D1)

[0025] M3 = 2ρ3H2(L2 + D2)

[0026] M4=ρ4V4

[0027]

[0028] M6=ρ6V6

[0029] In the formula, dx and dy represent the infinitesimal segments of the base plate along two horizontal directions, respectively; in addition, the manufacturing cost C of the support-type suspension cable vibration reduction system must meet the following constraints during the solution process:

[0030]

[0031] In the formula, σ i Let [σ] be the stress of the material of the i-th structure.i [ ] represents the allowable stress of the corresponding material;

[0032] ε i Let [ε] be the strain of the material of the i-th structure. i [ ] represents the allowable strain of the corresponding material;

[0033] n is the quantity of materials used;

[0034] def represents the deformation of the support-type vibration damping system, lim represents the deformation limit of the support-type vibration damping system, and is a set value;

[0035] H d The plumb bob distance between the connection point of the rigid support and the sling separator and the center of the sling clamp is calculated using the following formula:

[0036] H d =2L c ζ s

[0037] In the formula, ζ s The design damping ratio of the support-type cable vibration reduction system is calculated using the following formula:

[0038] ζ s =ζ d -ζ other -ζ n

[0039] In the formula, ζ d Design the damping ratio for the sling; ζ other Damping ratio provided for other vibration reduction measures; ζ n L is the inherent damping ratio of the sling; c This refers to the length of the sling.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] 1. The bracket-type sling vibration reduction system of the present invention is equipped with four support springs, which provide additional stiffness to the system, effectively avoid excessive deformation of the system, and is safe and reliable.

[0042] 2. The damping vibration reduction system in this invention is directly mounted on the main beam and has a base, making it safe and stable; the internal viscous fluid can be directly replaced, which facilitates installation and subsequent operation and maintenance.

[0043] 3. The damping vibration reduction system in this invention has side plates installed on the rigid support immersed in viscous liquid, which increases the contact area between the viscous liquid and the rigid support and improves the efficiency of the suspension cable vibration reduction.

[0044] 4. In this invention, the frequency modulation vibration reduction system is formed by connecting a frequency modulation mass element in series with a threaded rod, which is directly attached to the rigid support, saving installation space; and the threaded rod can screw the frequency modulation mass element in and out, which facilitates the frequency adjustment of the frequency modulation vibration reduction system.

[0045] 5. The damping vibration reduction system and the frequency modulation vibration reduction system in this invention work together. The damping vibration reduction system can effectively control the low-frequency large-amplitude vibration of the sling, and the frequency modulation vibration reduction system can effectively control the high-frequency vibration near the corresponding mode, thereby meeting the overall control requirements of the support-type vibration reduction system for multi-mode vibration.

[0046] 6. The present invention adopts a multi-parameter joint optimization scheme, which can improve the overall working efficiency of the vibration reduction system. That is, under the premise that the damping ratio of the bracket-type vibration reduction system remains unchanged, the overall mass of the system is reduced, thereby reducing the manufacturing cost. Attached Figure Description

[0047] Figure 1 This is the front view of the present invention;

[0048] Figure 2 This is a side view of the present invention;

[0049] Figure 3 yes Figure 2 Section I-I;

[0050] Figure 4 This is a top view of the side panel.

[0051] List of reference numerals in the attached diagram:

[0052] 1. Rigid support; 2. Frequency-modulated mass element; 3. Threaded rod; 4. Viscous liquid; 5. Elastic buffer tank; 6. Support spring; 7. Base; 8. Side plate; 9. Main beam; 10. Sling; 11. Sling clamp; 12. Rigid support branch; 13. Ball joint; 14. Support end plate; 15. Sling separator. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0054] like Figures 1-4 As shown, this invention proposes a suspension bridge cable-stayed vibration reduction system. The corresponding main structure of the suspension bridge includes a main beam 9, cables 10, cable clamps 11, and cable separators 15. The suspension cables 10 are connected to the main beam 9. Each set of cables 10 includes two or more parallel multi-strand cables. The multi-strand cables are connected by the cable separators 15. The cables 10 are connected to the main beam 9 by the cable clamps 11.

[0055] The vibration reduction system includes a damping vibration reduction system and a frequency modulation vibration reduction system. The damping vibration reduction system includes a rigid support 1, a viscous liquid 4, an elastic buffer box 5, a support spring 6, a base 7, a ball joint 13, and a support end plate 14. The base 7 is fixedly installed above the main beam 9 and is connected to the surface of the main beam 9 for fixation. The elastic buffer box 5 is placed above the base 7 and fixed to the base 7 by the support spring 6. The viscous liquid 4 is placed inside the elastic buffer box 5. One end of the rigid support 1 is bolted to the sling separator 15 through the support end plate 14, and the other end is immersed in the elastic buffer box 5 containing the viscous liquid 4 and fixed in the box body of the elastic buffer box 5 by the ball joint 13. The rigid support 1 is also provided with a corner, and a rigid support branch 12 is provided at the corner near the elastic buffer box 5.

[0056] The frequency modulation vibration reduction system includes a threaded rod 3 and a frequency modulation mass element 2. One end of the threaded rod 3 is connected to a rigid support branch 12, and the frequency modulation mass element 2 passes through the threaded rod 3 to control high-frequency vibration.

[0057] The elastic buffer box 5 includes a bottom plate and side wall panels. Both the bottom plate and the side wall panels are hollow structures, and the interior of both the bottom plate and the side wall panels are filled with elastic filler.

[0058] A top plate is installed above the elastic buffer box 5. The rigid support 1 passes through the top plate and is immersed in the viscous liquid 4. It is fixed to the bottom plate of the elastic buffer box 5 by ball joint 13. A spring fixing seat is provided on the base 7. One end of the support spring 6 is connected to the top plate, and the other end is fixed to the spring fixing seat.

[0059] Four support springs 6 are provided, and the four support springs 6 are symmetrically fixed at the four corners of the top plate.

[0060] The bottom plate of the elastic buffer box 5 is provided with a spherical groove, and the bottom of the rigid bracket 1 is equipped with a ball joint 13. The rigid bracket 1 is fixed by being snapped into the spherical groove through the ball joint 13.

[0061] The angle between the supporting spring 6 and the side wall of the elastic buffer box 5 is in the range of 5 to 15°.

[0062] The rigid support 1 is also equipped with a side plate 8, which is used to increase the contact area with the viscous liquid 4, increase the damping force generated by the relative motion with the viscous liquid 4, and reduce the vibration of the rigid support 1 and the sling 10 connected thereto. The side plate 8 is located inside the viscous liquid 4.

[0063] This invention proposes a suspension bridge cable-stayed vibration reduction system. The corresponding main structure of the suspension bridge includes a main beam 9, cables 10, cable clamps 11, and cable separators 15. The vibration reduction system includes a damping vibration reduction system and a frequency-modulated vibration reduction system. The damping vibration reduction system includes a rigid support 1, a viscous liquid 4, an elastic buffer box 5, a support spring 6, a ball joint 13, and a support end plate 14. The frequency-modulated vibration reduction system includes a threaded rod 3 and a frequency-modulated mass element 2.

[0064] The rigid support 1 is bolted to the sling divider 15 via the support end plate 14. The rigid support 1 undergoes two beveled changes at a preset position, thus forming a corner on the rigid support 1. The corner near the elastic buffer box 5 extends vertically downward and is immersed in the elastic buffer box 5 containing viscous liquid 4, and is fixed by ball joint 13. The elastic buffer box 5 is connected to the base 7, and the base 7 is fixed to the surface of the main beam 9.

[0065] The bottom plate and side wall plates of the elastic buffer box 5 are filled with elastic filler. The side wall plates provide material stiffness for the elastic buffer box 5, and the elastic filler inside provides elastic deformation performance, has an energy dissipation function, and does not completely constrain the rotation of the rigid support 1. The viscous liquid 4 inside the elastic buffer box 5 dissipates the vibration energy of the rigid support 1 and the sling 10 connecting the rigid support 1 through relative movement with the rigid support 1 and the side plate 8, so as to achieve vibration reduction.

[0066] Multiple support springs 6 are used to provide additional stiffness to the elastic buffer box 5, ensuring that the overall stiffness of the system is met and the overall deformation is controllable. Four support springs 6 are provided, located at the four corners of the elastic buffer box 5. The angle between the support springs 6 and the vertical direction of the elastic buffer box 5 is 5 to 15°, which can simultaneously limit the vertical and lateral deformation of the system.

[0067] By constructing a function of the manufacturing cost C of the suspension bridge cable-stayed vibration damping system with respect to the mass M of the materials used in each subsystem, the optimal component parameters of the suspension bridge cable-stayed vibration damping system are obtained. The design parameters of the suspension bridge cable-stayed vibration damping system include: material unit mass price w1, material density ρ1, cross-sectional area A1, total length L1 of the rigid support 1 and threaded rod 3; material unit mass price w2, material density ρ2 of the internal filling of the elastic buffer box 5; material unit area price w3, material surface density ρ3 of the outer shell of the elastic buffer box 5; length L2, height H2, width D2 of the elastic buffer box 5; length L3, height H3, width D3 of the internal space of the elastic buffer box 5; material unit mass price w4, material density ρ4 of the viscous liquid 4; volume V4 of the viscous liquid 4; material unit mass price w5, material density ρ5 of the base 7; shape area Ω5 of the base 7; height H5 of the base 7; material unit mass price w6, material density ρ6 of the frequency-modulated mass element 2; and mass block volume V6. Assuming the costs of components such as the supporting spring 6, various connectors, ball joint 13, and side plate 8 are not considered, and the outer shell thickness of the elastic buffer box 5 is negligible, the mass M of the bracket-type vibration damping system consists of the mass M1 of the rigid bracket 1, the mass M2 of the internal filling of the elastic buffer box 5, the mass M3 of the outer shell of the elastic buffer box 5, the mass M4 of the viscous liquid 4, the mass M5 of the base 7, and the mass M6 of the frequency modulation element 2. Then, the manufacturing cost C of the bracket-type vibration damping system is expressed as a function of the mass M of the bracket-type vibration damping system as follows:

[0068] min C={w i M1, w2M2, w3M3, w4M4, w5M5, w6M6}

[0069] in:

[0070] M1=ρ1A1L1

[0071] M2=ρ2(L2H2D2-L1H1D1)

[0072] M3 = 2ρ3H2(L2 + D2)

[0073] M4=ρ4V4

[0074]

[0075] M6=ρ6V6

[0076] In the formula, dx and dy represent the infinitesimal segments of the base plate along two horizontal directions, respectively; in addition, the manufacturing cost C of the support-type suspension cable vibration reduction system must meet the following constraints during the solution process:

[0077]

[0078] In the formula, σ i Let [σ] be the stress of the material of the i-th structure. i [ ] represents the allowable stress of the corresponding material;

[0079] ε i Let [ε] be the strain of the material of the i-th structure. i [ ] represents the allowable strain of the corresponding material;

[0080] n is the quantity of materials used;

[0081] def represents the deformation of the support-type vibration damping system, lim represents the deformation limit of the support-type vibration damping system, and is a set value;

[0082] H d The plumb distance from the connection point between the rigid support and the sling separator to the center of the sling clamp is calculated using the following formula: H d =2L c ζ s

[0083] In the formula, ζ s The design damping ratio of the support-type cable vibration reduction system is calculated using the following formula:

[0084] ζ s =ζ d -ζ other -ζ n

[0085] In the formula, ζ d Design the damping ratio for the sling; ζ other Damping ratio provided for other vibration reduction measures; ζ n L is the inherent damping ratio of the sling; c This refers to the length of the sling.

[0086] The suspension bracket vibration reduction system of this invention is equipped with four support springs 6, which provide additional stiffness to the system, effectively avoiding excessive deformation of the system, and ensuring safety and reliability.

[0087] The damping and vibration reduction system in this invention is directly mounted on the main beam 9 and is equipped with a base 7, which is safe and stable; the internal viscous liquid 4 can be directly replaced, which is convenient for installation and subsequent operation and maintenance.

[0088] The damping vibration reduction system of the present invention has a side plate 8 installed on the rigid support 1 immersed in viscous liquid 4, which increases the contact area between viscous liquid 4 and rigid support 1 and improves the vibration reduction efficiency of sling 10.

[0089] In this invention, the frequency modulation vibration reduction system is formed by connecting the frequency modulation mass element 2 in series with the threaded rod 3 and directly attaching it to the rigid bracket 1, which saves installation space; and the threaded rod 3 can screw the frequency modulation mass element 2 in and out, which facilitates the frequency adjustment of the frequency modulation vibration reduction system.

[0090] In this invention, the damping vibration reduction system and the frequency modulation vibration reduction system work together. The damping vibration reduction system can effectively control the low-frequency large-amplitude vibration of the sling 10, and the frequency modulation vibration reduction system can effectively control the high-frequency vibration near the corresponding mode, thereby meeting the overall control requirements of the bracket-type vibration reduction system for multi-mode vibration.

[0091] This invention employs a multi-parameter joint optimization scheme, which can improve the overall working efficiency of the vibration reduction system. That is, under the premise that the damping ratio of the bracket-type vibration reduction system remains unchanged, the overall mass of the system is reduced, thereby reducing the manufacturing cost.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any modifications or equivalent changes made based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A kind of suspension bridge cable hanger type damping system, corresponding suspension bridge main structure includes main beam (9), cable (10), cable clamp (11) and cable separator (15), suspension bridge cable (10) is connected with main beam (9), each group of cable (10) includes two or more parallelly arranged multiple cable, multiple cable is connected by cable separator (15), the cable (10) is connected with main beam (9) by cable clamp (11), it is characterized in that: The damping system includes damping damping system and frequency modulation damping system, The damping damping system includes rigid support (1), viscous liquid (4), elastic buffer box (5), supporting spring (6), base (7), ball hinge (13) and support end plate (14), the base (7) is fixedly installed on main beam (9) top, the base (7) is connected with the surface of main beam (9) and is realized fixed, the elastic buffer box (5) is placed on the base (7) top and is fixed on the base (7) by supporting spring (6), the viscous liquid (4) is placed in the elastic buffer box (5), one end of the rigid support (1) is bolted with the cable separator (15) by support end plate (14), the other end is immersed in the elastic buffer box (5) with viscous liquid (4), and is fixed in the box of elastic buffer box (5) by ball hinge (13), rigid support (1) is also provided with corner, and rigid support branch (12) is provided at the corner close to elastic buffer box (5), The frequency modulation damping system includes threaded rod (3) and frequency modulation mass element (2), one end of the threaded rod (3) is connected on rigid support branch (12), threaded rod (3) is worn with frequency modulation mass element (2), to control high-frequency vibration. The box of the elastic buffer box (5) includes bottom plate and side wall plate, the bottom plate and side wall plate are all hollow structure, the bottom plate and side wall plate are filled with elastic filler inside, The top plate is installed above the elastic buffer box (5), the rigid support (1) is immersed into the viscous liquid (4) by passing through the top plate, and is fixed to the bottom plate of the elastic buffer box (5) by the ball hinge (13), the base (7) is provided with spring fixed seat, one end of the supporting spring (6) is connected on the top plate, and the other end is fixed on the spring fixed seat. Four supporting springs (6) are provided, and the four supporting springs (6) are fixed symmetrically at the four corners of the top plate. The bottom plate of the elastic buffer box (5) is provided with a spherical recess, the bottom of the rigid support (1) is provided with a ball hinge (13), and the rigid support (1) is fixed by being clamped in the spherical recess through the ball hinge (13).

2. A suspension bridge cable hanger type damping system according to claim 1, characterized in that: The angle between the supporting spring (6) and the side wall plate of the elastic buffer box (5) is 5-15 °.

3. A system according to claim 2, wherein: The rigid support (1) is also provided with a side plate (8) for increasing the contact area with the viscous liquid (4) and improving the damping force generated by the relative motion of the viscous liquid (4), thereby reducing the vibration of the rigid support (1) and the cable (10) connected thereto, and the side plate (8) is located in the viscous liquid (4).

4. A system according to claim 3, wherein: ​ 5. A suspension bridge cable hanger type damping system according to claim 2, characterized in that: ​ 6. A suspension bridge cable hanger type damping system according to claim 1, characterized in that: ​ 7. The suspension bridge cable hanger type damping system according to claim 1, characterized in that: ​

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