A low-damping tuned mems-damper device

Abstract

The present application belongs to the technical field of low-frequency vibration control, aiming at the problems of high damping ratio, instability, low vibration control efficiency and unsuitable for large-scale engineering of existing inertial damper, a low-damping tuned inertial damper device is provided, which provides the possibility for the whole system to realize the required optimal damping ratio, and further efficiently controls low-frequency resonance. Unlike traditional rigid support and transmission mode, the device adopts economical, reliable and convenient flexible suspension support and transmission mode to realize low frequency and stable low damping of the system. The flexible support part and the rigid inertial device are in contact transmission around, which eliminates the high damping caused by high energy consumption due to instability caused by friction and collision in traditional inertial tuned mass damper, so as to ensure that the large inertial system realizes stable low damping ratio, meets the needs of realizing optimal control effect, and is directly applied to large engineering structure resonance control.

Description

A low-damping tuned inertial capacitive damping device Technical Field

[0001] This invention belongs to the field of low-frequency vibration control technology, and relates to a low-damping tuned inertial capacitance damping device that achieves stability using flexible suspension support and transmission. Background Technology

[0002] Tuned mass dampers can control resonance in many applications, such as vortex-induced vibration (vortex-induced vibration) in long-span bridges, high-rise buildings, and masts. For a specified tuning target frequency, the static deformation of the spring under the action of the mass's weight can be expressed as g / (2πf). 2 The formula is used to calculate the static deformation of a spring, where g and f are the gravitational acceleration and vibration frequency, respectively. It can be seen that the static deformation of the spring is inversely proportional to the square of the frequency. At lower frequencies, there is a problem of excessive static elongation or compression of the spring. For example, at frequencies of 0.25Hz, 0.15Hz, and 0.1Hz, the static deformation of the spring is approximately 4.0m, 11.0m, and 24.8m, respectively. Adding the original length of the spring would require even more space. However, this is not feasible in many practical engineering projects. Many long-span bridges may have vortex-induced vibration frequencies below 0.3Hz, some even below 0.1Hz, while their internal vertical space is typically less than 4m. In such cases, traditional tuned mass dampers cannot be directly used to control such low-frequency (<0.3Hz) resonances.

[0003] An inertial container converts small translational motions into large rotational motions, providing the system with an equivalent mass far exceeding its own physical mass. Introducing this into a tuned mass damper allows for the use of a smaller physical mass to drive the inertial container's rotation, achieving a larger equivalent mass; this can be called a tuned inertial capacitive damper (or simply inertial container). This significantly reduces vibration frequency, spring strength, original spring length, and static deformation of the spring under the weight of the mass, thus making it possible to install the damper system inside a bridge box girder. The inertial container concept is simple, and the relevant analytical methods are relatively mature, solving the problem of significantly reducing the system's vibration frequency.

[0004] The publicly available literature "Inertial Capacity Vibration Damping System and Its Research Progress" (Zhang Ruifu et al., Engineering Mechanics, 2019(10):8-27) provides some traditional inertial containers, whose transmission methods include gear and rack type, ball screw type, etc. The self-weight of the inertial container is usually rigidly supported, and the transmission between the mass body and the inertial container is also usually rigidly connected. The prominent common problem of these inertial containers is that the frictional force between certain mechanical parts is very large or changes greatly over time due to installation errors or other cumulative deformations, and there may also be collision problems, which leads to the damping ratio of the tuned inertial container being too large and unstable. The theoretical analysis in the publicly available foreign language paper "Using tuned mass damper inerter to mitigate vortex-induced vibration of long-span bridges: Analytical study" (Xu Kun et al., Engineering Structures, 2019(182):101-111) shows that when the physical mass of the inertial container and the modal mass of the controlled structure are within the range of 0.5%-1.5%, the optimal damping ratio of the inertial container is often between 2% and 3%. However, to date, no cases have been found in engineering full-scale inertial containers where the damping ratio can be stably controlled below 5%, thus failing to guarantee reliable and efficient vibration control.

[0005] In summary, introducing inertial capacitance into a tuned mass damper system can solve the frequency reduction problem. However, due to its existing rigid support and transmission method, the system damping ratio is too large and exhibits significant randomness, severely hindering its engineering application. Given the problems of excessively large and unstable damping ratios in traditional inertial dampers, their inability to achieve optimal damping ratios, and their difficulty in practical engineering applications, there is an urgent need for optimization and improvement. If the damping ratio can be stably controlled below 2%, or even lower, the optimal damping ratio required by the system can be achieved by conveniently adding additional damping methods, thus maximizing control efficiency and promoting its engineering applications. Summary of the Invention

[0006] This invention provides a flexible suspension support and transmission device for achieving stable low damping ratio in a tuned inertial container, which solves the problem that traditional inertial containers have low control efficiency and cannot be put into engineering practice due to excessive damping and inability to obtain the optimal damping ratio.

[0007] This invention provides a simple and reliable flexible suspension device for a tuned inertial container, and a transmission device between vertical and torsional displacements. A sector-shaped block with holes / slits is placed at a suitable position on the inertial container. A high-strength flexible connector passes through the holes / slits of the sector-shaped block, thereby suspending and supporting the self-weight of the inertial container on the controlled structure. A fixed support device is set on the tuning mass. The high-strength flexible connector is wound around the inertial container's axis of rotation at a specified position and direction. This allows the fixed support device to drive the inertial container to reciprocate as it vibrates up and down with the mass, achieving a larger equivalent mass and thus reducing the system's vibration frequency. The sector-shaped block also rotates around the top contact surface of the high-strength flexible connector, while the connector remains vertical. The entire transmission system of the inertial container essentially eliminates the damping caused by friction in traditional inertial containers, resulting in a total system damping ratio of less than 1%. The optimal damping ratio required by the system can be achieved through adjustment or additional damping, thereby realizing efficient control of ultra-low frequency resonance. This flexible suspension transmission system is not limited to controlling vertical resonance; it can also be arranged on both sides of a torsional system to control torsional resonance.

[0008] The technical solution of the present invention:

[0009] A low-damping tuned inertial-capacitance damping device includes a vertical tension spring 1, a mass body 2, a first support 3, a first high-strength flexible connector 4, a second high-strength flexible connector 5, an inertial container shaft 6, an inertial container flywheel 7, an inertial container fan-shaped support device 8, a third high-strength flexible connector 9, a second support 10, and a tensioner 11.

[0010] The upper end of the vertical tension spring 1 is suspended below the top plate of the box girder, and the lower end is suspended on the mass body 2, forming a vertical vibration system with the vertical tension spring 1 and the mass body 2; the first support 3 is fixed on the mass body 2; a pair of first high-strength flexible connectors 4 and second high-strength flexible connectors 5 are symmetrically arranged on both sides of the inertia container shaft 6 to ensure symmetrical force on the inertia container shaft 6; the upper end of the first high-strength flexible connector 4 is connected to the top of the first support 3, and it wraps around the outer surface of the inertia container shaft 6 at least half a turn, and its lower end is fixed inside the inertia container shaft 6; the lower end of the second high-strength flexible connector 5 is connected to the bottom of the first support 3, and it wraps around the outer surface of the inertia container shaft 6 at least half a turn, and its upper end is fixed inside the inertia container shaft 6. The first high-strength flexible connector 4 is fixed inside the inertial container shaft 6; the inertial container flywheel 7 is symmetrically and coaxially fixed with the inertial container shaft 6, providing most of the equivalent mass for the inertial container; the inertial container fan-shaped support device 8 is coaxially fixed with the inertial container shaft 6 on the inertial container flywheel 7; the lower end of the third high-strength flexible connector 9 is connected to the fan-shaped support device 8, and the upper end is connected to the second bracket 10, used to suspend and support the self-weight of the inertial container; the second bracket 10 is fixedly supported under the top plate of the box girder; tensioners 11 are set at the top and bottom of the first bracket 3 to adjust the force on the first high-strength flexible connector 4 and the second high-strength flexible connector 5, so as to avoid them being in a relaxed state and affecting the vibration control efficiency.

[0011] The material, specific size, cross-sectional shape, and quantity of the vertical tension spring 1 are not limited. Springs with large initial stress can be used, which only begin to elongate after reaching a certain tension, thereby minimizing the static elongation of the spring and improving the original length of the spring and vibration control efficiency.

[0012] The specific materials and structural form of the mass body 2 are not limited. It does not necessarily have to be made of steel. More economical reinforced concrete slabs or even water tanks can be used, which can significantly reduce the project cost.

[0013] The first support 3 is fixed to the mass body 2 or integrated with the mass body 2. The first support 3 drives the inertia container shaft 6 and the inertia container flywheel 7 to rotate through the first high-strength flexible connector 4 and the second high-strength flexible connector 5 to provide the system with a very large equivalent mass, so as to significantly reduce the vibration frequency of the system. The material and specific structural form of the first support 3 are not limited.

[0014] The first high-strength flexible connector 4 and the second high-strength flexible connector 5 are wound adjacently in opposite directions on the inertial container shaft 6, and are in a vertical plane when stationary. To ensure the symmetry and stability of the transmission, two pairs are required to be arranged symmetrically on the left and right.

[0015] The materials, specifications, and dimensions of the first high-strength flexible connector 4 and the second high-strength flexible connector 5 are not limited, ensuring their strength, rigidity, and flexibility. The first high-strength flexible connector 4 and the second high-strength flexible connector 5 bear tensile force and are directly wound around the inertial container shaft 6, which can convert the up-and-down translation of the mass body 2 into the rotation of the inertial container shaft 6, effectively avoiding the high damping caused by friction or collision in traditional inertial container systems (such as those using gears and toothed plates or ball screws).

[0016] The material of the inertia container shaft 6 is not limited, but steel or aluminum tubing is recommended to ensure lightweight, high strength, smoothness, and wear resistance. The diameter of the inertia container shaft 6 is not limited, and can generally be used within the range of 5-50cm, depending on the amplitude and available space. A smaller diameter allows for a smaller amplitude, but also a higher mass magnification of the inertia container, requiring a smaller diameter and mass of the inertia container flywheel 7. The number and length of the inertia container shafts 6 are not limited and can be optimized according to needs.

[0017] The material, form, and size of the inertial container flywheel 7 are not limited, and it does not necessarily have to be a circular wheel. The mass should be arranged as far away from the center of rotation as possible to provide a larger equivalent mass. The determination can be made by comprehensively considering factors such as economy, convenience, and durability.

[0018] The aforementioned sector-shaped support device 8 for the inertial container primarily supports the container's own weight and the inertial force of its rotation, ensuring that the container undergoes pure torsional motion. The sector-shaped support device 8 is equipped with appropriately sized holes or slots to facilitate the passage of the third high-strength flexible connector 9. The lower end of the third high-strength flexible connector 9 is fixed to the bottom of the sector-shaped support device 8 by knotting or other convenient and reliable methods. The top of the sector-shaped support device 8 is rounded to avoid excessive sharpness that could lead to excessive shear stress on the third high-strength flexible connector 9. Under the condition of ensuring sufficient strength and rigidity, the sector-shaped support device 8... The included angle should be as small as possible, which allows the inertial container to rotate at the largest possible angle without causing the third high-strength flexible connector 9 to come into contact with the side of the fan-shaped support device 8, thus ensuring that the inertial container undergoes pure torsional motion; the unidirectional rotation angle of the third high-strength flexible connector 9 generally cannot exceed 160 degrees, so in order to ensure a sufficiently large amplitude, the diameter of the inertial container shaft 6 must be large enough (usually >10cm); the inertial container flywheel 7 and the inertial container fan-shaped support device 8 are not necessarily limited to both sides of the inertial container shaft 6, but can also be symmetrically arranged at other positions of the inertial container shaft 6.

[0019] The material, specifications, and dimensions of the third high-strength flexible connector 9 are not limited, ensuring its strength, stiffness, and flexibility; the diameter of the rope and the thickness of the strap cannot be too large, otherwise it will cause relatively large bending and tensile stress. The third high-strength flexible connector 9 is used to suspend the inertial container fan-shaped support device 8. During the rotation of the inertial container and the fan-shaped support device 8, the third high-strength flexible connector 9 always remains in a vertical state, thus effectively avoiding the high damping caused by friction or collision in traditional inertial container system support methods.

[0020] The form of the second support 10 is not limited; it can be fixed under the top plate of the box girder or supported on the bottom plate of the box girder. Its strength and rigidity are related to factors such as the distance between the lifting point on the third high-strength flexible connector 9 and the top / bottom plate.

[0021] The form of the tensioner 11 is not limited, as long as it is convenient to reliably adjust the force on the first high-strength flexible connector 4 and the second high-strength flexible connector 5 so that they are in a taut state.

[0022] The inertial container fan-shaped support device 8 is replaced by a rigid round bar 12 with a smaller diameter, and the rigid round bar 12 is fixed coaxially with the inertial container rotating shaft 6; the third high-strength flexible connector 9 is replaced by a linear tension spring 13 and a high-strength thin rope 14 connected in sequence; the high-strength thin rope 14 is fixed to the bottom of the rigid round bar 12, the rigid round bar 12 vibrates to the torsion, and the linear tension springs 13 on both sides reciprocate to stretch and shorten to achieve low-damping transmission; the rigid round bar 12 vibrates up and down relative to the second support 10; the diameter of the rigid round bar 12 is as small as possible while ensuring strength and stiffness, so as to reduce the vibration of the rigid round bar 12 relative to the second support 10 and ensure control efficiency.

[0023] The rigid round bar 12 can also be directly suspended and supported by the third high-strength flexible connector 9. Compared with the inertial container fan-shaped support device 8, as the inertial container shaft 6 rotates, the rigid round bar 12 rotates around the third high-strength flexible connector 9. During this process, the rigid round bar 12 undergoes vertical vibration. Similarly, the diameter of the rigid round bar 12 should be as small as possible to ensure control efficiency.

[0024] The end of the inertial container shaft 6 can also be placed within the inner ring of the low-damping bearing 15, with the outer edge of the low-damping bearing 15 held in place by a third high-strength flexible connector 9, ensuring that the inertial container system remains in a stable rotational state throughout the vibration process. During the vibration of the inertial container, various unpredictable disturbances may occur. Compared with traditional fixed supports, the flexible support method using the third high-strength flexible connector 9 can largely avoid external excitation loads, thereby ensuring a stable damping ratio for the inertial container system. If the third high-strength flexible connector 9 is not installed at the lower edge of the low-damping bearing 15, the inertial container system needs to have sufficient physical mass to prevent it from being pulled upwards. If the third high-strength flexible connector 9 is installed at the lower edge of the low-damping bearing 15, it can be ensured that when the upward inertial force exceeds the physical mass of the inertial container system, the inertial container system will not be pulled upwards and will remain in a stable rotational state. This can significantly reduce the physical mass of the entire inertial container system, reducing material and transportation / installation costs.

[0025] Compared to the fan-shaped support device 8, the three support methods listed above have no limit on the rotation angle of the inertial container, which can exceed 180 degrees or even 360 degrees in one direction; under the condition of achieving the same vertical amplitude, the diameter of the inertial container shaft 6 and the diameter of the flywheel 7 can be greatly reduced.

[0026] As needed, the second support 10 is supported on the mass body 2. Correspondingly, the first support 3 is fixed on the top plate or bottom plate of the box girder. That is, the fixed support components of the first support 3 and the second support 10 are interchanged. The transmission system is equivalent to the support method described above and achieves the same function.

[0027] High-strength flexible connectors are generally ropes, lines, cables, belts, or chains, with no restrictions on form, size, or material.

[0028] The self-weight of the inertial container is usually supported by rigid support. This invention proposes to use a flexible suspension method, which can effectively achieve lower stability damping to meet the optimal control target. There are various specific suspension support forms, which will not be listed one by one.

[0029] The beneficial effects of the present invention are as follows: (1) The tuned inertial-capacitance damper of the flexible suspension support and transmission device proposed in this invention basically eliminates the high damping caused by friction and collision in the traditional rigid transmission method. For example, when the mass body is 5 tons, the physical mass of the inertial container is 1 ton, and the equivalent mass is 50 tons, the damping ratio of the system of the present invention can be as low as 5‰; (2) The components of the present invention are easy to assemble and disassemble, can be quickly installed and disassembled, and are highly replaceable; (3) The device provided by the present invention has a lower cost and better economic efficiency; (4) The present invention has strong applicability and is not limited to controlling the vertical bending vortex vibration of bridges. It can also be arranged on both sides of the main beam to control the torsional vortex vibration of bridges, or controlled by local adjustment to control the resonance of other engineering systems. Attached Figure Description

[0030] Figure 1 is a structural diagram of a flexible suspension support and transmission device for achieving stable low damping ratio of a tuned inertial mass damper (taking the use of a vertical tension spring for vertical vortex vibration of a steel box girder bridge as an example).

[0031] Figure 2 is a partial enlarged view of the first bracket suspension transmission device;

[0032] Figure 3 is a partial enlarged view of the second bracket suspension support device;

[0033] Figures 4, 5, and 6 show three other implementation methods for the second bracket suspension support device.

[0034] In the diagram: 1 Vertical tension spring, 2 Mass body, 3 First support, 4 First high-strength flexible connector, 5 Second high-strength flexible connector, 6 Inertia container shaft, 7 Inertia container flywheel, 8 Inertia container fan-shaped support device, 9 Third high-strength flexible connector, 10 Second support, 11 Tensioner, 12 Rigid round bar, 13 Linear tension spring, 14 High-strength thin rope, 15 Low-damping bearing. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in detail below with reference to the technical solutions and accompanying drawings.

[0036] As shown in Figure 1, a low-damping tuned inertial-capacitance damping device, taking the vertical vortex vibration of a steel box girder bridge using a vertical tension spring as an example, includes a vertical tension spring 1, a mass body 2, a first support 3, a first high-strength flexible connector 4, a second high-strength flexible connector 5, an inertial container shaft 6, an inertial container flywheel 7, an inertial container fan-shaped support device 8, a third high-strength flexible connector 9, a second support 10, and a tensioner 11. The upper end of the vertical tension spring 1 is suspended below the top plate of the box girder, and the lower end is suspended from the mass body 2. The vertical tension spring 1 and the mass body 2 can form a basic vertical vibration system. The first support 3 is fixed on the mass body 2. The upper end of the first high-strength flexible connector 4 is connected to the top of the first support 3, and the lower end is fixed inside the inertia container shaft 6 and wrapped around the outer surface of the inertia container shaft 6 at least half a turn. The lower end of the second high-strength flexible connector 5 is connected to the bottom of the first support 3, and the upper end is fixed inside the inertia container shaft 6 and wrapped around the outer surface of the inertia container shaft 6 at least half a turn. A pair of first high-strength flexible connectors 4 and second high-strength flexible connectors 5 are symmetrically arranged on both sides of the inertia container shaft 6 to ensure... The inertia container shaft 6 can be symmetrically stressed and rotate smoothly back and forth; the inertia container flywheel 7 is symmetrically fixed coaxially with the inertia container shaft 6, providing most of the equivalent mass for the inertia container; the inertia container fan-shaped support device 8 is fixed coaxially with the inertia container shaft 6; the lower end of the third high-strength flexible connector 9 is connected to the fan-shaped support device 8, and the upper end is connected to the second bracket 10, used to suspend and support the self-weight of the inertia container; the second bracket 10 can be supported on the top or bottom plate of the box girder; a tensioner 11 is set at the top or bottom of the first bracket 3 to adjust the stress on the first high-strength flexible connector 4 and the second high-strength flexible connector 5, so as to avoid them being in a relaxed state and affecting the vibration control efficiency.

[0037] The inertial container sector support device 8 (as shown in Figure 3) can also be replaced by a rigid round bar 12 with a smaller diameter (as shown in Figure 4). The rigid round bar 12 is fixed coaxially with the inertial container shaft 6. The third high-strength flexible connector 9 can be replaced by a linear tension spring 13 and a high-strength thin rope 14 connected in sequence (as shown in Figure 4). The high-strength thin rope 14 is fixed to the bottom of the rigid round bar 12. The rigid round bar 12 undergoes torsional vibration, and the linear tension springs 13 on both sides reciprocate to stretch and shorten, which can also achieve low-damping transmission. The diameter of the rigid round bar 12 should be as small as possible while ensuring strength and stiffness to reduce the vertical vibration of the rigid round bar 12. The rigid round bar 12 can also be suspended and supported by the third high-strength flexible connector 9 (as shown in Figure 5). Compared with the sector support device 8, the rigid round bar 12 will also experience vertical vibration during the rotation of the inertial container shaft 6 around the third high-strength flexible connector 9. The diameter of the rigid round bar 12 should be as small as possible to ensure control efficiency.

[0038] The inertia container shaft 6 can also be placed in the inner ring of the low-damping bearing 15 (as shown in Figure 6). The third high-strength flexible connector 9 is used to pull the low-damping bearing 15 up and down, so that the inertia container shaft 6 can rotate at any angle. The relatively fixed bearing support method can ensure more stable low damping.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any equivalent changes, modifications, or variations made by those skilled in the art to the above examples using the technical solutions of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A low-damping tuned inertial capacitance damping device, characterized in that, The low-damping tuned inertial-capacitance damping device includes a vertical tension spring (1), a mass (2), a first support (3), a first high-strength flexible connector (4), a second high-strength flexible connector (5), an inertial container shaft (6), an inertial container flywheel (7), an inertial container fan-shaped support device (8), a third high-strength flexible connector (9), a second support (10), and a tensioner (11). The upper end of the vertical tension spring (1) is suspended below the top plate of the box girder, and the lower end is suspended on the mass (2). The vertical tension spring (1) and the mass (2) form a vertical vibration system. The first support (3) is fixed on the mass (2). A pair of first high-strength flexible connectors (4) and second high-strength flexible connectors (5) are symmetrically arranged on both sides of the inertial container shaft (6) to ensure that the inertial container shaft (6) is subjected to symmetrical forces. The upper end of the first high-strength flexible connector (4) is connected to the top of the first support (3), and it wraps around the outer surface of the inertial container shaft (6) for at least half of its length. The lower end of the first high-strength flexible connector (5) is fixed inside the inertial container shaft (6); the lower end of the second high-strength flexible connector (5) is connected to the bottom of the first support (3), and it wraps around the outer surface of the inertial container shaft (6) at least half a turn, and its upper end is fixed inside the inertial container shaft (6); the inertial container flywheel (7) is symmetrically and coaxially fixed with the inertial container shaft (6) to provide most of the equivalent mass for the inertial container; the inertial container fan-shaped support device (8) is coaxially fixed with the inertial container shaft (6) on the inertial container flywheel (7); the lower end of the third high-strength flexible connector (9) is connected to the fan-shaped support device (8), and the upper end is connected to the second support (10) to suspend and support the self-weight of the inertial container; the second support (10) is fixedly supported under the top plate of the box girder; tensioners (11) are set at the top and bottom of the first support (3) to adjust the force on the first high-strength flexible connector (4) and the second high-strength flexible connector (5) so that they are not in a relaxed state and affect the vibration control efficiency.

2. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The first support (3) is fixed on the mass body (2) or integrated with the mass body (2). The first support (3) drives the inertial container shaft (6) and the inertial container flywheel (7) to rotate through the first high-strength flexible connector (4) and the second high-strength flexible connector (5) to provide the system with a very large equivalent mass, so as to significantly reduce the vibration frequency of the system.

3. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The first high-strength flexible connector (4) and the second high-strength flexible connector (5) are wound in opposite directions on the inertial container shaft (6) and are in a vertical plane when stationary.

4. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The inertial container shaft (6) is made of steel or aluminum tube with a diameter of 5-50cm.

5. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The inertial container flywheel (7) and the inertial container sector support device (8) are arranged on both sides of the inertial container shaft (6) or symmetrically at other positions on the inertial container shaft (6).

6. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The inertial container fan-shaped support device (8) has holes or slots for the third high-strength flexible connector (9) to pass through; the third high-strength flexible connector (9) is used to suspend the inertial container fan-shaped support device (8), and the third high-strength flexible connector (9) is always in a vertical state during the rotation of the inertial container and the fan-shaped support device (8); the top of the fan-shaped support device (8) is rounded; the unidirectional rotation angle of the fan-shaped support device (8) around the third high-strength flexible connector (9) does not exceed 160 degrees.

7. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The inertial container fan-shaped support device (8) is replaced by a rigid round bar (12), which is coaxially fixed with the inertial container rotating shaft (6); the third high-strength flexible connector (9) is replaced by a linear tension spring (13) and a high-strength thin rope (14) connected in sequence; the high-strength thin rope (14) is fixed to the bottom of the rigid round bar (12), the rigid round bar (12) vibrates to the torsion, and the linear tension springs (13) on both sides reciprocate to stretch and shorten to achieve low-damping transmission.

8. The low-damping tuned inertial capacitance damping device according to claim 7, characterized in that, The rigid round bar (12) is directly suspended and supported by the third high-strength flexible connector (9).

9. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The end of the inertial container shaft (6) is placed in the inner ring of the low-damping bearing (15), and the upper and lower outer edges of the low-damping bearing (15) are pulled up and down by the third high-strength flexible connector (9).

10. The low-damping tuned inertial capacitance damping device according to claim 1, characterized in that, The second support (10) is supported on the mass body (2) as needed, and the first support (3) is fixed on the top plate or bottom plate of the box girder. That is, the fixed support components of the first support (3) and the second support (10) are interchanged to achieve the same function.

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