A damping device for vibration reduction of a rod-shaped structure

Abstract

The present invention provides a damping device for vibration reduction of a rod-shaped structure, which includes two sets of force transmission components symmetrically arranged perpendicular to the length direction of the rod-shaped structure. The force transmission components include a first force transmission inclined rod hinged to the rod-shaped structure and an axial damper hinged to a fixed foundation. Among them, the hinge point of the axial damper is arranged close to the symmetry center of the two sets of force transmission components, and the piston end of the axial damper is arranged far from the symmetry center of the two sets of force transmission components; one end of the first force transmission inclined rod far from the rod-shaped structure is hinged to the piston end of the axial damper. The present invention has the advantages of good energy dissipation and vibration reduction effect, simple structure and low cost, etc.

Description

Technical Field

[0001] The present invention relates to the field of bridge vibration control, and particularly to a damping device for vibration reduction of rod-shaped structures. Background Art

[0002] Structural vibration control is to set active or passive energy dissipation devices on a structure, and increase the structural damping and consume the vibration energy of seismic and wind loads through the energy absorption mechanism of the device or the non-linear deformation of energy dissipation materials, so as to reduce and suppress the dynamic response of the main structure under the action of earthquakes, strong winds and other dynamic loads, improve the ability of the structure to resist external vibrations, and meet the requirements of structural safety, practicability, economy, etc. In the field of civil engineering, from the perspective of the structural control mechanism, structural vibration control is usually divided into four forms: passive control, active control, hybrid control and semi-active control.

[0003] The vibration of bridge stay cables is usually controlled by controlled or semi-active dampers. Among them, the existing controlled dampers usually connect the control points on the stay cables to the bridge foundation through dampers; in order to achieve the expected vibration control effect on the transverse direction of the stay cables, the control points on the stay cables are far from the bridge deck (foundation), and a certain installation height of the damper is required. Due to the limited length of the stay cable damper, a connecting structure (such as a column or a cantilever, etc.) for connecting the lower node of the damper needs to be led out from the bridge deck to facilitate the installation of the damper. However, the existing method has the following problems: (1) According to the force analysis, during the vibration control process, the lower end of the column will be subjected to large bending moments and shear forces, and this value is proportional to the movement speed of the stay cable and also proportional to the height of the column. To ensure the normal and safe use of the damper, the cross-section of the column needs to be enlarged, and the fixing requirements at the bottom of the column are high. Usually, the method of embedding a bottom plate is used to place the column, which results in a large amount of connecting structure material consumption and high cost, especially for the working conditions of ultra-long stay cables and high damper installation positions; (2) In the application scenario of stay cable vibration control, for cable-stayed bridges, when the stay cable moves away from the bridge tower near the bridge tower, its inclination angle gradually decreases, and the damper installation height requirement will also decrease accordingly, which brings difficulties to the design of the column. The usual treatment method is to segment the required installation height of the stay cable damper and set multiple installation height intervals. Although this method simplifies the design of the column, it also sacrifices the vibration control effect of some stay cables at the interval edges to a certain extent; (3) At the same time, the existing dampers are directly connected to the control points of the stay cables, and the dampers are arranged at a certain angle. The installation method makes the damping force acting on the stay cable be the component force of the damper damping force. The damping coefficient of the stay cable damper is reduced to a certain extent for both in-plane and out-of-plane control, and its damping coefficient is low, and the vibration reduction and energy consumption effect is poor.

[0004] Chinese Patent Invention 201910395071.9 discloses a "lever mass damping system for controlling the vibration of stay cables". It places the first damper 30 and the second damper 31 in the accommodation cavity of the support 5 near the bridge deck, and connects the stay cable with the damper through the lever mechanisms 2 and 4; when the stay cable undergoes out-of-plane vibration along the transverse direction, the transverse movement of the stay cable is transmitted to the second damper 31 through the connecting member 2, and the damper alone exerts a damping effect. Since the lever arm of the connecting member 2 near the second damper 31 is smaller and the lever arm near the stay cable is larger, the damping effect of the second damper 31 for controlling the transverse vibration of the stay cable is reduced; when the stay cable undergoes in-plane vibration, the vibration of the stay cable is transmitted to the first damper 30 through the connecting member 2 and the L-shaped lever 4, and the first damper 30 exerts a damping effect. Since the length of the first lever arm 40 is greater than that of the second lever arm 41, this structure has a better control effect on the in-plane vibration of the stay cable. However, the first damper and the second damper of the present invention work independently, respectively controlling the in-plane and out-of-plane vibrations of the stay cable, and cannot participate in the control of in-plane and out-of-plane vibrations simultaneously. That is to say, when the stay cable undergoes in-plane or out-of-plane vibration alone, one of the dampers does not participate in the work, resulting in low damper utilization efficiency and poor energy dissipation and vibration reduction effects; to achieve the energy dissipation and vibration reduction effect, the second damper needs to increase the energy consumption during the control of the out-of-plane vibration of the stay cable, and its cost is high. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a damping device for rod-shaped structure vibration reduction with good energy dissipation and vibration reduction effects, simple structure, and low cost.

[0006] To solve the above technical problems, the technical solution proposed by the present invention is as follows:

[0007] A damping device for rod-shaped structure vibration reduction, comprising two sets of force transmission components symmetrically arranged perpendicular to the length direction of the rod-shaped structure. The force transmission components include a first force transmission inclined rod hinged to the rod-shaped structure and an axial damper hinged to a fixed foundation. Among them, the hinge point of the axial damper is arranged near the symmetry center of the two sets of force transmission components, and the piston end of the axial damper is arranged away from the symmetry center of the two sets of force transmission components; the end of the first force transmission inclined rod away from the rod-shaped structure is hinged to the piston end of the axial damper.

[0008] As a further improvement of the above technical solution:

[0009] A sliding pair is provided between the first force transmission inclined rod and the piston end of the axial damper. The sliding pair includes an axial slider and a guide rail for placing the axial slider. The first force transmission inclined rod and the piston end of the axial damper are hinged to the axial slider; the guide rail is arranged on the fixed foundation and is arranged along the moving direction of the piston of the axial damper.

[0010] The axial damper is arranged horizontally or obliquely.

[0011] The axial dampers of the two sets of force transmission components are both hinged to the fixed foundation through a damper connecting piece; the damper connecting piece is arranged at the symmetric center of the two sets of force transmission components and is fixedly installed on the fixed foundation or the guide rail.

[0012] The first force transmission diagonal rods of the two sets of force transmission components are both hinged to the rod-shaped structure through a main force transmission rod; the force transmission component further includes a second force transmission diagonal rod located above the first force transmission diagonal rod, one end of the second force transmission diagonal rod is movably sleeved outside the main force transmission rod through a main rod slider, and the other end of the second force transmission diagonal rod is hinged to the piston end of the axial damper.

[0013] One end of the main force transmission rod is hinged or fixedly connected to the rod-shaped structure, and the other end of the main force transmission rod is hinged to the first force transmission diagonal rod.

[0014] The main force transmission rod is connected to the rod-shaped structure through a hoop, the hoop is installed outside the rod-shaped structure, and the main force transmission rod is hinged or fixedly connected to the hoop.

[0015] The main force transmission rod and the rod-shaped structure are arranged perpendicular to each other or at a certain angle.

[0016] The rod-shaped structure is arranged horizontally, vertically or obliquely.

[0017] The rod-shaped structure is a stay cable or a pipeline.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] (1) The setting form of the present invention enables the movement of the rod-shaped structure to be transmitted to the piston end of the axial damper through the first force transmission diagonal rod. Then, the axial damper feeds back a certain damping force according to the movement speed and transmits it back to the rod-shaped structure through the first force transmission diagonal rod, which makes the energy dissipation and vibration reduction effect of the rod-shaped structure good. Specifically:

[0020] The rod-shaped structure will undergo vertical and lateral vibrations when externally excited. When the rod-shaped structure undergoes vertical vibration alone, the two force transmission components will move symmetrically with each other. That is, as the rod-shaped structure rises or falls, the hinged ends of the two first force transmission diagonal rods and the axial damper will approach or move away from each other, and the two axial dampers will shorten or elongate simultaneously. At this time, the vertical velocity of the rod-shaped structure is not equal to the velocity of the axial damper, the damping force of the axial damper is not equal to the vertical component of the nodal reaction force of the rod-shaped structure, and the lateral damping coefficient of the axial damper is related to the angle θ between the first force transmission diagonal rod and the axial damper. That is, when θ is in the range of 0 to 90 degrees, the larger θ is, the larger the vertical damping amplification coefficient of the rod-shaped structure is, and as the angle increases, the vertical damping amplification coefficient of the rod-shaped structure increases sharply, which makes the vertical damping coefficient of the axial damper have an amplification effect and ensures the effect of vertical vibration control of the rod-shaped structure.

[0021] 0When the rod-shaped structure undergoes horizontal vibration alone, the hinged ends of the two first force transmission diagonal rods and the axial damper will follow the rod-shaped structure to make synchronous horizontal sliding. Taking the rod-shaped structure moving to the right as an example, the hinged ends of the two first force transmission diagonal rods and the axial damper will follow the rod-shaped structure to move to the right, and the moving speeds are equal. The axial damper on the left will shorten, and the axial damper on the right will elongate. At this time, the horizontal velocity of the rod-shaped structure is equal to the velocity of the axial damper, the damping force of the axial damper is equal to the horizontal component of the nodal reaction force of the rod-shaped structure, and the lateral damping coefficient of the axial damper is independent of the angle θ between the first force transmission diagonal rod and the axial damper, which makes the damping coefficient of the axial damper not decrease and ensures the effect of horizontal vibration control of the rod-shaped structure.

[0022] When the structure undergoes simultaneous vertical and lateral movements, the movement of the axial damper is the superposition of the above two situations, and the damping coefficient of the axial damper is the superposition of the two, which ensures the vibration control effect of the rod-shaped structure when it undergoes simultaneous vertical and lateral movements.

[0023] (2) In the present invention, the axial dampers of the two force transmission components jointly participate in vibration control during in-plane and out-of-plane vibrations. There is no situation where only one damper works alone during in-plane or out-of-plane vibrations, and the utilization rate of the dampers is high, further improving the energy dissipation and vibration reduction effect.

[0024] (3) The first force transmission diagonal rod only bears the action of axial forces (alternating tensile and compressive forces) during the vibration control process. The stress distribution on the cross-section of the first force transmission diagonal rod is uniform, and the required cross-sectional size of the rod is small. It avoids the occurrence of using sensors directly connected to the rod-shaped structure, setting extension connection structures with large material consumption and difficult installation. While ensuring the energy dissipation and vibration reduction effect, it greatly reduces the material consumption and installation difficulty, and greatly reduces the cost.

[0025] (4) When it is a rod-shaped structure arranged obliquely (such as a stay cable), for stay cables with different inclination angles, the present invention can also perform segmented processing on the length of the connector according to the installation height of the damping device in the same way as the traditional columnar connector. However, the difference is that: the installation positions (stay cable control points) of the first force-transferring diagonal rod of the present invention and the stay cable have a certain adjustment range when the lengths of the first force-transferring diagonal rods are equal. On the premise of ensuring reasonable heights of the stay cable control points in each segmented interval, it ensures the optimal vibration control effect of the stay cable within the stroke range of the axial damper.

[0026] (5) The two groups of force-transferring components of the present invention are symmetrically arranged perpendicular to the length direction of the rod-shaped structure. The first force-transferring diagonal rod is hinged to the rod-shaped structure, and the axial damper is respectively hinged to the fixed foundation and the first force-transferring diagonal rod. The hinge points of the axial damper are arranged close to the symmetry center of the two groups of force-transferring components, and the piston ends of the axial damper are arranged away from the symmetry center of the two groups of force-transferring components. Its structure is simple, the layout is compact, and the installation is convenient. Description of the Drawings

[0027] In the following, the present invention will be described in more detail based on embodiments and with reference to the drawings. Among them:

[0028] Figure 1 is the structural schematic diagram of Embodiment 1 of the present invention.

[0029] Figure 2 is the force analysis schematic diagram of Embodiment 1 of the present invention.

[0030] Figure 3 is the structural schematic diagram of Embodiment 1 of the present invention in specific application (the rod-shaped structure is in an inclined state).

[0031] Figure 4 is the structural schematic diagram of Embodiment 1 of the present invention in specific application (the rod-shaped structure is in a horizontal state).

[0032] Figure 5 is the structural schematic diagram of Embodiment 1 of the present invention in specific application (the rod-shaped structure is in a vertical state).

[0033] Figure 6 is another structural schematic diagram of Embodiment 1 of the present invention in specific application (the rod-shaped structure is in a vertical state).

[0034] Figure 7 is the structural schematic diagram of Embodiment 2 of the present invention.

[0035] Figure 8 is the structural schematic diagram of Embodiment 2 of the present invention in specific application (the rod-shaped structure is in an inclined state).

[0036] Figure 9It is a schematic structural diagram of Embodiment 2 of the present invention in specific application (the rod-shaped structure is in a horizontal state).

[0037] Figure 10 It is a schematic structural diagram of Embodiment 2 of the present invention in specific application (the rod-shaped structure is in a vertical state).

[0038] Figure 11 It is a schematic structural diagram of Embodiment 3 of the present invention.

[0039] Figure 12 It is a schematic structural diagram of Embodiment 4 of the present invention.

[0040] Each label in the figure represents:

[0041] 1. Force transmission component; 11. First force transmission inclined rod; 12. Axial damper; 121. Cylinder end; 122. Piston end; 13. Sliding pair; 131. Axial slider; 132. Guide rail; 14. Second force transmission inclined rod; 2. Rod-shaped structure; 3. Fixed foundation; 4. Damper connecting piece; 5. Main force transmission rod; 6. Main rod slider; 7. Hoop. Specific embodiments

[0042] The present invention will be further described in detail below in conjunction with the specification drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0043] Embodiment 1

[0044] As Figures 1 to 6 An embodiment of the damping device for vibration reduction of a rod-shaped structure of the present invention is shown. The rod-shaped structure 2 can be a rod-shaped component such as a stay cable or a pipeline. The damping device can control the vertical and horizontal movements (in-plane and out-of-plane movements) of the rod-shaped component. In this embodiment, the damping device includes two groups of force transmission components 1, and the two groups of force transmission components 1 are symmetrically arranged perpendicular to the length direction of the rod-shaped structure 2. The force transmission component 1 includes a first force transmission inclined rod 11 and an axial damper 12. Among them, one end of the first force transmission inclined rod 11 is hinged to the rod-shaped structure 2, and the other end of the first force transmission inclined rod 11 is hinged to the piston end 122 of the axial damper 12 to transmit the movement of the rod-shaped structure 2 to the axial damper 12; the cylinder end 121 of the axial damper 12 is hinged to the fixed foundation 3, and the hinge point of the axial damper 12 is arranged close to the symmetry center of the two groups of force transmission components 1, and the piston end 122 of the axial damper 12 is arranged away from the symmetry center of the two groups of force transmission components 1. Its structure is simple, the layout is compact, and the installation is convenient.

[0045] The setting form of the present invention enables the movement of the rod-shaped structure 2 to be transmitted to the piston end 122 of the axial damper 12 through the first force-transmitting inclined rod 11. Then, the axial damper 12 feeds back a certain damping force according to the movement speed and transmits it back to the rod-shaped structure 2 through the first force-transmitting inclined rod 11 to ensure the energy dissipation and vibration reduction effect of the rod-shaped structure 2. Specifically:

[0046] When the rod-shaped structure 2 is externally excited, it will undergo vertical and lateral vibrations. When the rod-shaped structure 2 undergoes vertical vibration alone, the two force-transmitting assemblies 1 will move symmetrically with respect to each other. That is, as the rod-shaped structure 2 rises or falls, the hinged ends of the two first force-transmitting inclined rods 11 with the axial damper 12 will approach or move away from each other, and the two axial dampers 12 will shorten or elongate simultaneously. At this time, the vertical speed of the rod-shaped structure 2 is not equal to the speed of the axial damper 12, the damping force of the axial damper 12 is not equal to the vertical component of the nodal reaction force of the rod-shaped structure 2, and the lateral damping coefficient of the axial damper 12 is related to the angle θ between the first force-transmitting inclined rod 11 and the axial damper 12. The larger the θ value, the larger the vertical damping amplification coefficient of the rod-shaped structure 2, and the vertical damping amplification coefficient of the rod-shaped structure 2 increases sharply with the increase of the θ value, which makes the vertical damping coefficient of the axial damper 12 have an amplification effect and ensures the vertical vibration control effect of the rod-shaped structure 2. The analysis is as follows:

[0047] As Figure 2 shown, the relationship between the vertical speed v y of the rod-shaped structure 2 and the speed v of the axial damper 12 is v y = v / tan(θ); the relationship between the vertical component F y of the nodal reaction force of the rod-shaped structure 2 and the output force F of the axial damper 12 is F y = F·tan(θ); the damping coefficient C y of the damping device for the vertical movement of the rod-shaped structure 2 is: Cy = F y / v y = F·tan 2 (θ) / v = C·tan 2 (θ), where C is the damping coefficient of the axial damper 12; the vertical damping amplification coefficient γ of the rod-shaped structure 2 satisfies tan 2 (θ) = γ. It can be seen that the vertical damping amplification coefficient γ of the rod-shaped structure 2 is related to the angle θ between the first force-transmitting inclined rod 11 and the axial damper 12, that is, when θ is in the range of 0 to 90 degrees, the larger the θ value, the larger the vertical damping amplification coefficient γ of the rod-shaped structure 2, and the vertical damping amplification coefficient γ of the rod-shaped structure 2 increases sharply with the increase of the θ value.

[0048] When the rod-shaped structure 2 vibrates horizontally alone, the hinged ends of the two first force-transferring diagonal rods 11 with the axial damper 12 will slide horizontally synchronously with the rod-shaped structure 2. Taking the rightward movement of the rod-shaped structure 2 as an example, the hinged ends of the two first force-transferring diagonal rods 11 with the axial damper 12 will move rightward with the rod-shaped structure 2, and the moving speeds are equal. The axial damper 12 on the left will shorten, and the axial damper 12 on the right will elongate. At this time, the horizontal speed of the rod-shaped structure 2 is equal to the speed of the axial damper 12, the damping force of the axial damper 12 is equal to the horizontal component of the node reaction force of the rod-shaped structure 2, and the transverse damping coefficient of the axial damper 12 is independent of the angle θ between the first force-transferring diagonal rod 11 and the axial damper 12, which ensures that the damping coefficient of the axial damper 12 will not decrease and guarantees the vibration control effect of the rod-shaped structure 2 in the horizontal direction.

[0049] When the structure moves vertically and horizontally simultaneously, the movement of the axial damper 12 is the superposition of the above two situations, and the damping coefficient of the axial damper 12 is the superposition of the two, which ensures the vibration control effect of the rod-shaped structure 2 when it moves vertically and horizontally simultaneously.

[0050] In the present invention, the axial dampers 12 of the two force-transferring assemblies 1 participate in vibration control together during in-plane and out-of-plane vibrations. There is no situation where only one damper works alone during in-plane or out-of-plane vibrations. The utilization rate of the axial dampers 12 is high, which further improves the energy dissipation and vibration reduction effect.

[0051] At the same time, the first force-transferring diagonal rod 11 only bears the action of axial force (alternating tensile and compressive forces) during the vibration control process, and it does not bear the action of bending moment. The stress distribution on the cross-section of the first force-transferring diagonal rod 11 is uniform, and the required cross-sectional size of the rod is small, which avoids problems such as using sensors directly connected to the rod-shaped structure 2, large amount of materials for setting up extended connection structures, and difficult installation. While ensuring the energy dissipation and vibration reduction effect, it greatly reduces the amount of materials used and the installation difficulty, and greatly reduces the cost.

[0052] When the rod-shaped structure 2 is arranged obliquely (such as a stay cable), for stay cables with different inclination angles, the present invention can also perform segmented processing on the length of the connector according to the installation height of the damping device in the same way as traditional column-type connectors. However, the difference is that: the installation positions (stay cable control points) of the first force-transferring diagonal rod 11 and the stay cable have a certain adjustment range when the length of the first force-transferring diagonal rod 11 is equal. At the same time, the angle θ between the first force-transferring diagonal rod 11 and the axial damper 12 is adjusted accordingly with the adjustment of the installation position of the first force-transferring diagonal rod 11 and the stay cable, which ensures the optimal vibration control effect of the stay cable within the stroke range of the axial damper 12 on the premise of ensuring the reasonable height of the stay cable control points in each segmented interval.

[0053] Further, as Figure 1As shown in the figure, a sliding pair 13 is provided between the first force - transmitting diagonal rod 11 and the piston end 122 of the axial damper 12. The sliding pair 13 includes a guide rail 132 and an axial slider 131. Among them, the guide rail 132 is arranged on the fixed foundation 3, and the guide rail 132 is arranged along the moving direction of the piston of the axial damper 12; both the first force - transmitting diagonal rod 11 and the piston end 122 of the axial damper 12 are hinged to the axial slider 131; the axial slider 131 is arranged in the guide rail 132, so that the axial slider 131 can move along the moving direction of the piston of the axial damper 12, to transmit the acting force transmitted by the first force - transmitting diagonal rod 11 to the axial damper 12, and transmit the damping force fed back by the axial damper 12 back to the rod - shaped structure 2 through the first force - transmitting diagonal rod 11.

[0054] At the same time, the axial slider 131 can disperse the axial bearing capacity of the axial damper 12, ensuring the reliable and safe operation of the axial damper 12 under high loads. And from the above analysis, it can be seen that the transverse damping coefficient of the axial damper 12 is not amplified. Therefore, the design load required for the guide rail 132 is small, and the guide rail 132 even does not need to be pre - embedded, which greatly improves the convenience and efficiency of component installation and reduces the installation cost. In other embodiments, when the axial damper 12 bears a small load, the sliding pair 13 can also be cancelled, and the first force - transmitting diagonal rod 11 is directly connected to the piston end 122 of the axial damper 12.

[0055] In this embodiment, the axial damper 12 is horizontally arranged, and the guide rail 132 is parallel to the axial damper 12, so that the axial slider 131 moves along the moving direction of the piston of the axial damper 12 to ensure the normal operation of the axial damper 12. In other embodiments, the axial damper 12 can also be obliquely arranged, which reduces the lateral installation space of the damping device and avoids the occurrence of the jamming phenomenon of the axial damper 12. At this time, the guide rail 132 is also set to be parallel to the axial damper 12.

[0056] Furthermore, the axial dampers 12 of the two groups of force - transmitting components 1 are both hinged to the fixed foundation 3 through a damper connecting piece 4. The damper connecting piece 4 is arranged at the symmetric center of the two groups of force - transmitting components 1, and the damper connecting piece 4 is fixedly installed on the fixed foundation 3 or the guide rail 132. This makes the installation and disassembly of the axial damper 12 convenient, and the installation structure is simple.

[0057] Even further, the first force - transmitting diagonal rod 11 is connected to the rod - shaped structure 2 through a hoop 7. The hoop 7 is installed outside the rod - shaped structure 2, and the first force - transmitting diagonal rod 11 is hinged to the hoop 7. This makes the installation of the first force - transmitting diagonal rod 11 convenient, and the installation structure is simple.

[0058] As Figures 3 to 6 shown, the damping device of the present invention can be applied to the vibration control of rod - shaped structures 2 arranged horizontally, vertically or obliquely. Its application range is wide and its versatility is strong. At the same time, asFigure 4 and Figure 5 As shown in Figure 5 , the first force - transmitting diagonal rod 11 and the rod - shaped structure 2 are arranged perpendicular to each other; or as shown in Figure 3 and Figure 6 Figure 6 , the first force - transmitting diagonal rod 11 and the rod - shaped structure 2 may also be arranged at a certain angle.

[0059] Taking the stay cable with the rod - shaped structure 2 arranged obliquely as an example, the working principle of the damping device in this embodiment is as follows: The vertical and horizontal combined movement of the stay cable can be decomposed into vertical and horizontal movements. The vertical movement can cause the hinged ends of the two first force - transmitting diagonal rods 11 and the axial damper 12 to approach or move away from each other, and the two axial dampers 12 will shorten or elongate simultaneously. The horizontal movement can cause the hinged ends of the two first force - transmitting diagonal rods 11 and the axial damper 12 to slide horizontally synchronously following the stay cable, resulting in the elongation or shortening of the axial damper 12. The vertical and horizontal combined movement of the stay cable is the superposition of vertical and horizontal movements. At the same time, the damping force fed back by the axial damper 12 acts on the stay cable through the first force - transmitting diagonal rod 11 to achieve the purpose of controlling the vibration of the stay cable.

[0060] Embodiment 2

[0061] Figures 7 to 10 Figures 7 to 10 shows another embodiment of the damping device for reducing the vibration of the rod - shaped structure of the present invention. This embodiment is basically the same as Embodiment 1, except that the first force - transmitting diagonal rods 11 of the two sets of force - transmitting components 1 in this embodiment are all hinged to the rod - shaped structure 2 through a main force - transmitting rod 5; the force - transmitting component 1 further includes a second force - transmitting diagonal rod 14. The second force - transmitting diagonal rod 14 is located above the first force - transmitting diagonal rod 11. One end of the second force - transmitting diagonal rod 14 is movably sleeved outside the main force - transmitting rod 5 through a main - rod slider 6, and the other end of the second force - transmitting diagonal rod 14 is hinged to the piston end 122 of the axial damper 12.

[0062] The vertical damping amplification factor γ of the rod - shaped structure 2 in Embodiment 1 is related to the angle θ between the first force - transmitting diagonal rod 11 and the axial damper 12. When θ is close to 90°, the vertical damping amplification factor γ increases sharply, and the damping device may lock. Therefore, in order to avoid the locking phenomenon, the value of θ cannot be too large. When the value of θ is small and the distance between the rod - shaped structure 2 and the fixed foundation 3 is far, the distance between the hinged end of the first force - transmitting diagonal rod 11 and the axial damper 12 will be very large, resulting in a large lateral installation space for the damping device.

[0063] To solve the above problems, in this embodiment, a main force transfer rod 5 is provided. The first force transfer diagonal rod 11 is hinged to the rod-shaped structure 2 through a main force transfer rod 5. When the distance between the rod-shaped structure 2 and the fixed foundation 3 remains unchanged, the hinge point of the first force transfer diagonal rod 11 and the rod-shaped structure 2 moves downward through the setting of the main force transfer rod 5, which greatly shortens the length of the first force transfer diagonal rod 11. At this time, when the θ value is small, the distance between the hinged end of the first force transfer diagonal rod 11 and the axial damper 12 is greatly shortened compared with Embodiment 1, thereby saving the lateral installation space required for the damping device. On the basis of ensuring the vibration reduction and energy dissipation function, the installation space of the damping device is greatly reduced, and the structure is simple and the cost is low.

[0064] Meanwhile, in order to ensure that the main force transfer rod 5 effectively transfers the lateral force, a second force transfer diagonal rod 14 and a main rod slider 6 are provided. The second force transfer diagonal rod 14 is movably sleeved outside the main force transfer rod 5 through the main rod slider 6. The main rod slider 6 can move along the axial direction of the main force transfer rod 5 when the rod-shaped structure 2 moves. It enables the main force transfer rod 5 to always maintain a vertical state when bearing the lateral acting force, and enables the damping device to have only one lateral degree of freedom, so that the main force transfer rod 5 can still reliably transfer the acting force during the lateral movement, ensuring the vibration control effect of the rod-shaped structure 2.

[0065] The second force transfer diagonal rod 14 and the first force transfer diagonal rod 11 simultaneously participate in the transfer of the acting force between the rod-shaped structure 2 and the axial damper 12, that is, the second force transfer diagonal rod 14 and the first force transfer diagonal rod 11 transfer the movement transmitted by the main force transfer rod 5 to the axial damper 12, and feedback the damping force of the axial damper 12 back to the rod-shaped structure 2 through the main force transfer rod 5 to ensure the vibration control effect of the rod-shaped structure 2.

[0066] Furthermore, one end of the main force transfer rod 5 is fixedly connected to the rod-shaped structure 2. While transferring the vertical and lateral acting forces of the rod-shaped structure 2, it can transfer the bending moment of the rod-shaped structure 2. The other end of the main force transfer rod 5 is hinged to the first force transfer diagonal rod 11, which is equivalent to moving the hinge point of the first force transfer diagonal rod 11 and the rod-shaped structure 2 downward. In other embodiments, one end of the main force transfer rod 5 can also be hinged to the rod-shaped structure 2. At this time, only the vertical and lateral acting forces of the rod-shaped structure 2 can be transferred.

[0067] In this embodiment, the main force transfer rod 5 is connected to the rod-shaped structure 2 through a hoop 7. The hoop 7 is installed outside the rod-shaped structure 2, and the main force transfer rod 5 is connected to the hoop 7. It makes the installation of the main force transfer rod 5 convenient and the installation structure simple.

[0068] As Figures 7 to 10 shown, the damping device of the present invention can be applied to the vibration control of rod-shaped structures 2 arranged horizontally, vertically or obliquely. At the same time, the main force transfer rod 5 and the rod-shaped structure 2 can be arranged perpendicular to each other or at a certain angle.

[0069] The working principle of the damping device for the vibration reduction of the rod-shaped structure in this embodiment is as follows:

[0070] The vertical and horizontal combined movement of the rod-shaped structure 2 can be decomposed into vertical and horizontal movements. The vertical movement can cause the hinge ends of the two first force-transmitting diagonal rods 11 and the axial damper 12 to approach or move away from each other, and the two axial dampers 12 will shorten or elongate simultaneously. The horizontal movement can cause the hinge ends of the two first force-transmitting diagonal rods 11 and the axial damper 12 to perform synchronous horizontal sliding following the rod-shaped structure 2, resulting in the elongation or shortening of the axial damper 12. The vertical and horizontal combined movement of the rod-shaped structure 2 is the superposition of vertical and horizontal movements. At the same time, the damping force fed back by the axial damper 12 acts on the rod-shaped structure 2 through the first force-transmitting diagonal rod 11, the second force-transmitting diagonal rod 14, and the main force-transmitting rod 5, achieving the effect of vibration control of the rod-shaped structure 2.

[0071] Embodiment 3

[0072] Figure 11 An embodiment of another damping device for the vibration reduction of the rod-shaped structure according to the present invention is shown. This embodiment is basically the same as Embodiment 2, except that the axial damper 12 in this embodiment is arranged obliquely, which further reduces the lateral installation space of the damping device; at the same time, the included angle θ between the first force-transmitting diagonal rod 11 and the axial damper 12 is smaller than that in Embodiment 2, which makes it not easy for the axial damper 12 to get stuck when the piston end 122 moves, further ensuring the reliable operation of the axial damper 12 and further improving the energy dissipation and vibration reduction effect.

[0073] In this embodiment, the guide rail 132 is arranged parallel to the axial damper 12 so that the axial slider 131 can effectively move along the length direction of the axial damper 12, ensuring the normal operation of the axial damper 12.

[0074] Embodiment 4

[0075] Figure 12 An embodiment of another damping device for the vibration reduction of the rod-shaped structure according to the present invention is shown. This embodiment is basically the same as Embodiment 3, except that the sliding pair 13 is cancelled in this embodiment, and the axial damper 12 is directly installed on the fixed foundation 3, using the axial damper 12 itself to achieve the effect of a moving pair. On the premise that the load borne by the axial damper 12 is small, the piston end 122 of the axial damper 12 is directly hinged to the first force-transmitting diagonal rod 11 and the second force-transmitting diagonal rod 14, which can effectively save costs.

[0076] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A damping device for vibration reduction of a rod-shaped structure, characterized in that, The invention comprises two groups of force transmission components which are symmetrically arranged perpendicular to the length direction of the rod-like structure, wherein the force transmission components comprise a first force transmission inclined rod hinged to the rod-like structure, and an axial damper hinged to a fixed base, wherein the hinge point of the axial damper is arranged close to the symmetry center of the two groups of the force transmission components, and the piston end of the axial damper is arranged away from the symmetry center of the two groups of the force transmission components; one end of the first force transmission inclined rod away from the rod-like structure is hinged to the piston end of the axial damper; the axial damper is arranged obliquely; the first force transmission inclined rod of the two groups of the force transmission components The diagonal rods are hinged to the rod-like structure through a main force transmission rod; the force transmission assembly also includes a second force transmission diagonal rod located above the first force transmission diagonal rod, one end of the second force transmission diagonal rod is movably mounted outside the main force transmission rod through a main rod slider, and the other end of the second force transmission diagonal rod is hinged to the piston end of the axial damper, which enables the main force transmission rod to always remain in a vertical state when subjected to lateral force, and makes the damping device have only one lateral degree of freedom; the second force transmission diagonal rod and the first force transmission diagonal rod simultaneously participate in the transmission of force between the rod-like structure and the axial damper.

2. The damping device for vibration reduction of a rod-shaped structure according to claim 1, characterized in that, A sliding pair is provided between the first force transmission oblique rod and the piston end of the axial damper, and the sliding pair includes an axial slider and a guide rail for placing the axial slider. The first force transmission oblique rod and the piston end of the axial damper are hinged to the axial slider; the guide rail is provided on the fixed base and is arranged along the moving direction of the piston of the axial damper.

3. The damping device for vibration reduction of a rod-shaped structure according to claim 2, characterized in that, The axial dampers of the two groups of force transmission components are hinged to the fixed base through a damper connector; the damper connector is arranged at the symmetry center of the two groups of force transmission components and is fixedly installed on the fixed base or the guide rail.

4. The damping device for vibration reduction of a rod-shaped structure according to claim 3, characterized in that, One end of the main force transmission rod is hinged or fixedly connected to the rod-shaped structure, and the other end of the main force transmission rod is hinged to the first force transmission oblique rod.

5. The damping device for vibration reduction of a rod-shaped structure according to claim 4, characterized in that, The main force transmission rod is connected to the rod-shaped structure via a hoop, the hoop is installed outside the rod-shaped structure, and the main force transmission rod is hinged or fixedly connected to the hoop.

6. The damping device for vibration reduction of a rod-shaped structure according to claim 5, characterized in that, The main force transmission rod and the rod-shaped structure are arranged perpendicular to each other or at a certain angle.

7. The damping device for vibration reduction of a rod-shaped structure according to any one of claims 1 to 2, characterized in that, The rod-shaped structures are arranged horizontally, vertically or obliquely.

8. The damping device for vibration reduction of a rod-shaped structure according to claim 7, characterized in that, The rod-shaped structure is a stay cable or a pipe.

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