An anti-impact pendulum tuned mass damper for wind vibration control of a power transmission tower

Abstract

The utility model discloses a kind of anti-impact pendulum tuned mass damper for wind vibration control of transmission tower, including transmission tower, mass block, two groups of angle steel, two groups of connecting spring and two groups of spring L plate clamp.The utility model, with the spring L plate clamp of ring bolt can guarantee that connecting spring rotates freely, the disturbance of mass block non-tuned direction is solved by the design double hinge of steel pole up and down, the energy dissipation of traditional tuned mass damper of transmission tower under wideband excitation Limited damping effect is solved by installing viscoelastic energy dissipation device, and the influence on tower body when avoiding collision with tower body is solved by installing viscoelastic anti-collision pad in tuning direction, overall structure is simple, the structural response of transmission tower under wind load can be effectively controlled, the problem of transmission tower lateral collapse caused by first-order natural frequency vibration is solved, damping effect is good, anti-impact, worthy of promotion and application.

Description

Technical Field

[0001] This utility model relates to the field of wind vibration control technology for transmission towers, and in particular to an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers. Background Technology

[0002] Power transmission lines are the lifeblood of the power grid. Damage to transmission towers can paralyze the power supply system, causing serious consequences for society and people's lives and property. Typhoons are severe natural disasters, and strong typhoons can cause transmission towers to collapse laterally.

[0003] Tuned mass dampers are widely used in structural vibration response control. By rationally designing their spring stiffness and pendulum length, the frequency of the tuned mass damper is made close to the first natural frequency of the transmission tower when it collapses laterally. When an external force is applied to the main structure, the damper will move in the opposite direction to the main structure, thereby reducing the vibration response of the main structure. Especially in areas where typhoon disasters are frequent, the application of tuned mass damper vibration reduction technology is very necessary.

[0004] Currently, tuned mass damping technology has been applied to many tall buildings and structures. Among them, spring-tuned mass damping technology can solve the problem of excessively short pendulum length in pendulum-type tuned mass dampers. However, it still has problems such as the spring possibly twisting during installation, the tuned mass swinging amplitude being too large and potentially colliding with the tower, limited energy dissipation and vibration reduction effect under broadband excitation, and disturbances in the non-tuned direction of the mass. Therefore, the specific application of common tuned mass damping devices in transmission towers still needs to be improved based on actual conditions.

[0005] To address the aforementioned challenges, this invention proposes a spring L-plate clamp welded with ring bolts to ensure the free rotation of the connecting spring, a double-hinged design on the upper and lower steel rod to resolve disturbances in the non-tuning direction of the mass block, the installation of a viscoelastic energy dissipator to address the limited energy dissipation and vibration reduction effect of traditional tuned mass dampers under broadband excitation in transmission towers, and the installation of a viscoelastic anti-collision pad in the tuning direction to avoid the impact on the tower body when colliding with it. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-impact pendulum tuned mass damper for wind-induced vibration control of transmission towers.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an anti-collision pendulum tuned mass damper for wind vibration control of transmission towers, comprising a transmission tower, a mass block, two sets of angle steel, two sets of connecting springs, and two sets of spring L-plate clamps. The two sets of spring L-plate clamps are respectively fixed to the side angle steel of the transmission tower by a set of screws. The mass block is disposed between the two sets of spring L-plate clamps. The upper wall of the mass block is rotatably connected to two sets of steel rods through ear plates. The ends of the two sets of steel rods away from the mass block are movably connected to an upper L-plate clamp by bolts. The upper L-plate clamp is fixed to the angle steel at the top of the transmission tower by bolts. A set of spring fixing plates is fixedly connected to the left and right sides of the mass block respectively. One end of the connecting spring is fixedly connected to the mass block through the spring fixing plates. The end of the connecting spring away from the mass block is connected to the spring L-plate clamp. A viscoelastic anti-collision pad is provided on the side of the mass block with the spring fixing plates and at the end away from the spring fixing plates. A viscoelastic energy dissipator is disposed between the two sets of steel rods.

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

[0009] The viscoelastic energy dissipator includes two sets of inner steel plates, two sets of outer steel plates, and four sets of viscoelastic energy dissipating materials. The two sets of inner steel plates are arranged opposite each other along their length, with their opposite ends movably connected to the upper end of one set of steel rods and the lower end of another set of steel rods, respectively. The two sets of outer steel plates are respectively arranged on the front and rear sides of the opposite ends of the two sets of inner steel plates. The inner wall of the inner steel plate is provided with a limiting hole. The two sets of outer steel plates are fixed together by a limiting bolt. The section of the limiting bolt located between the two sets of outer steel plates passes through the limiting hole and is slidably connected to it. The four sets of viscoelastic energy dissipating materials are attached in pairs to the front and rear sides of one set of inner steel plates. The side of the viscoelastic energy dissipating material away from the inner steel plate is fixedly connected to the outer steel plate.

[0010] As a further description of the above technical solution:

[0011] The upper L-shaped clamp includes two sets of L-shaped upper plates and two sets of L-shaped lower plates. The two sets of L-shaped upper plates are fixedly connected to the one set of L-shaped lower plates in an upper-lower back-to-back structure. The two sets of L-shaped upper plates are fixed to the angle steel at the top of the transmission tower by bolts, and the two sets of L-shaped lower plates are movably connected to the upper end of the steel pole by bolts.

[0012] As a further description of the above technical solution:

[0013] The viscoelastic anti-collision pad is bonded to the mass block with epoxy adhesive.

[0014] As a further description of the above technical solution:

[0015] The spring L-plate clamp is provided with a ring bolt on the side facing the mass block, and the end of the connecting spring away from the mass block is engaged with the ring bolt.

[0016] This utility model has the following beneficial effects:

[0017] Compared with existing technologies, this anti-impact pendulum tuned mass damper for wind vibration control of transmission towers features a spring L-plate clamp with ring bolts to ensure free rotation of the connecting spring, a double hinge design on the upper and lower steel rods to address disturbances in the non-tuning direction of the mass block, the installation of a viscoelastic energy dissipator to address the limited energy dissipation and vibration reduction effect of traditional tuned mass dampers under broadband excitation, and the installation of a viscoelastic anti-collision pad in the tuning direction to avoid the impact on the tower body when colliding with it. The overall structure is simple, effectively controls the structural response of transmission towers under wind loads, solves the problem of lateral collapse of transmission towers caused by first-order natural frequency vibration, has good vibration reduction effect, and is impact-resistant, making it worthy of promotion and application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the spring L-plate clamp structure of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0020] Figure 3 This is an exploded view of the mass block and steel rod connection structure of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0021] Figure 4 This is an exploded view of the connection structure between the steel rod and the upper L-plate clamp of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0022] Figure 5 This is a partial schematic diagram of the steel rod, upper L-plate clamp, and angle steel connection structure of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0023] Figure 6 This is a schematic diagram of the viscoelastic energy dissipator structure of an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers proposed in this utility model.

[0024] Legend:

[0025] 1. Upper L-shaped clamp; 2. Steel rod; 3. Mass block; 4. Ear plate; 5. Connecting spring; 6. Viscoelastic anti-collision pad; 7. Spring fixing clamp; 8. Spring L-shaped clamp; 9. Bolt with ring; 10. L-shaped upper plate; 11. L-shaped lower plate; 12. Angle steel; 13. Viscoelastic energy dissipator; 1301. Inner steel plate; 1302. Outer steel plate; 1303. Viscoelastic energy dissipating material; 1304. Limit bolt; 1305. Limit hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1 to 6 This utility model provides an anti-impact pendulum tuned mass damper for wind vibration control of transmission towers: It includes a transmission tower, a mass block 3, two sets of angle steel 12, two sets of connecting springs 5, and two sets of spring L-plate clamps 8. The two sets of spring L-plate clamps 8 are respectively fixed to the side angle steel 12 of the transmission tower by a set of screws. The mass block 3 is positioned between the two sets of spring L-plate clamps 8. A ring bolt 9 is provided on the side of the spring L-plate clamps facing the mass block 3. A set of spring fixing plates 7 are fixedly connected to the left and right sides of the mass block 3, and one end of the connecting spring 5 is fixed to the mass block 3 through the spring fixing plates 7. The connecting spring 5 is connected to the end of the connecting spring 5 away from the mass block 3 and is fastened to the ring bolt 9. The connecting spring 5 provides stiffness to adjust the TMD frequency to match the first natural frequency of the transmission tower, and can also work with the viscoelastic anti-collision pad 6 to limit the displacement of the mass block 3. The spring L plate clamp 8 with ring bolt 9 can ensure that the connecting spring 5 can rotate freely. The spring fixing clamp 7 has bolt holes for fixing the connecting spring 5. The spring fixing clamp 7 can prevent the connecting spring 5 from deforming and being squeezed out after being squeezed.

[0028] Two sets of steel rods 2 are rotatably connected to the upper wall of the mass block 3 via ear plates 4. The ends of the two sets of steel rods 2 away from the mass block 3 are movably connected to an upper L-plate type clamp 1 by bolts. The upper L-plate type clamp 1 is fixed to the angle steel 12 at the top of the transmission tower by bolts. The upper L-plate type clamp 1 includes two sets of L-shaped upper plates 10 and two sets of L-shaped lower plates 11. The two sets of L-shaped upper plates 10 are fixedly connected to one set of L-shaped lower plates 11 in an upper-lower back-to-back structure. The two sets of L-shaped upper plates 10 are fixed to the angle steel 12 at the top of the transmission tower by bolts. The two sets of L-shaped lower plates 11 are movably connected to the upper end of the steel rods 2 by bolts. A viscoelastic anti-collision pad 6 is provided on the side of the mass block 3 where the spring fixing clamp 7 is located and at the end away from the spring fixing clamp 7. The viscoelastic anti-collision pad 6 is bonded to the mass block 3 by epoxy adhesive. The installation of the viscoelastic anti-collision pad 6 in the tuning direction can avoid the impact on the tower body when it collides with the tower body.

[0029] A viscoelastic energy dissipator 13 is installed between the two sets of steel rods 2. The viscoelastic energy dissipator 13 includes two sets of inner steel plates 1301, two sets of outer steel plates 1302, and four sets of viscoelastic energy-dissipating materials 1303. The two sets of inner steel plates 1301 are arranged opposite each other along their length, and their opposite ends are movably connected to the upper end of one set of steel rods 2 and the lower end of the other set of steel rods 2, respectively. The two sets of outer steel plates 1302 are respectively located on the front and rear sides of the opposite end of the two sets of inner steel plates 1301. The inner wall of the inner steel plate 1301 is provided with a limiting hole 1305. The two sets of outer steel plates 1302 are fixed together by a limiting bolt 1304. The limiting bolt 1304 is located at... A section of the limiting hole 1305 is slidably connected between the two sets of outer steel plates 1302. Four sets of viscoelastic energy dissipating materials 1303 are attached in pairs to the front and rear sides of a set of inner steel plates 1301. The side of the viscoelastic energy dissipating material 1303 away from the inner steel plate 1301 is fixedly connected to the outer steel plate 1302. When the relative movement of the inner steel plates 1301 at both ends of the viscoelastic energy dissipator 13 is too large, the limiting bolt 1304 and the side wall of the limiting hole 1305 come into contact and limit the movement, thereby protecting the viscoelastic energy dissipating material 1303 from damage due to excessive deformation of the viscoelastic energy dissipator 13 and preventing further damage to the transmission tower.

[0030] Working principle: The damper is fixedly suspended at the angle steel 12 at the top of the tower. When the transmission tower is subjected to wind load excitation vibration, the device will swing at the same frequency along the tuning direction; the working state of the connecting spring 5 switches between tension and compression; the relative movement of the two inner steel plates 1301 of the viscoelastic energy dissipator 13 causes the viscoelastic energy dissipating material 1303 to deform and reduce vibration; when the swing is too large, the impact is controlled by the viscoelastic anti-collision pad 6 to dissipate energy; as the wind load ends, the mass block 3 and the connecting spring 5 return to the initial state under the damping action, and the tuning mass damper vibration reduction device self-resets.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-impact pendulum tuned mass damper for wind-induced vibration control of transmission towers, characterized in that: The system includes a transmission tower, a mass block (3), two sets of angle steel (12), two sets of connecting springs (5), and two sets of spring L-plate clamps (8). The two sets of spring L-plate clamps (8) are respectively fixed to the side angle steel (12) of the transmission tower by a set of screws. The mass block (3) is set between the two sets of spring L-plate clamps (8). The upper wall of the mass block (3) is rotatably connected to two sets of steel rods (2) through ear plates (4). The ends of the two sets of steel rods (2) away from the mass block (3) are movably connected to an upper L-plate clamp (1) by bolts. The upper L-plate clamp (1) is connected to the upper L-plate clamp (1) by bolts. The bolt is fixed to the angle steel (12) at the top of the transmission tower. A set of spring fixing plates (7) are fixedly connected to the left and right sides of the mass block (3). One end of the connecting spring (5) is fixedly connected to the mass block (3) through the spring fixing plate (7). The end of the connecting spring (5) away from the mass block (3) is connected to the spring L plate clamp (8). A viscoelastic anti-collision pad (6) is provided on the side of the mass block (3) with the spring fixing plate (7) and at the end away from the spring fixing plate (7). A viscoelastic energy dissipator (13) is provided between the two sets of steel rods (2).

2. The impact-resistant pendulum tuned mass damper for wind-induced vibration control of transmission towers according to claim 1, characterized in that: The viscoelastic energy dissipator (13) includes two sets of inner steel plates (1301), two sets of outer steel plates (1302), and four sets of viscoelastic energy dissipating materials (1303). The two sets of inner steel plates (1301) are arranged opposite each other in the longitudinal direction, and their opposite ends are movably connected to the upper end of one set of steel rods (2) and the lower end of another set of steel rods (2), respectively. The two sets of outer steel plates (1302) are respectively arranged on the front and rear sides of the opposite end of the two sets of inner steel plates (1301). Limiting holes are provided on the inner wall of the inner steel plate (1301). (1305) The two sets of outer steel plates (1302) are fixed together by limiting bolts (1304). The limiting bolts (1304) are located between the two sets of outer steel plates (1302) and are slidably connected through the limiting hole (1305). The four sets of viscoelastic energy dissipating materials (1303) are pasted in pairs on the front and rear sides of a set of inner steel plates (1301). The side of the viscoelastic energy dissipating material (1303) away from the inner steel plate (1301) is fixedly connected to the outer steel plate (1302).

3. The anti-impact pendulum tuned mass damper for wind-induced vibration control of transmission towers according to claim 2, characterized in that: The upper L-shaped clamp (1) includes two sets of L-shaped upper plates (10) and two sets of L-shaped lower plates (11). The two sets of L-shaped upper plates (10) are fixedly connected to the one set of L-shaped lower plates (11) in an upper-lower back-to-back structure. The two sets of L-shaped upper plates (10) are fixed to the angle steel (12) at the top of the transmission tower by bolts. The two sets of L-shaped lower plates (11) are movably connected to the upper end of the steel rod (2) by bolts.

4. The impact-resistant pendulum tuned mass damper for wind-induced vibration control of transmission towers according to claim 3, characterized in that: The viscoelastic anti-collision pad (6) and the mass block (3) are bonded together with epoxy adhesive.

5. The anti-impact pendulum tuned mass damper for wind-induced vibration control of transmission towers according to claim 4, characterized in that: The spring L-plate clamp (8) is provided with a ring bolt (9) on the side facing the mass block (3), and the end of the connecting spring (5) away from the mass block (3) is engaged with the ring bolt (9).

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