Self-resetting variable friction composite impact pendulum damper

Abstract

The application discloses a self-resetting variable-friction composite impact pendulum damper, which comprises a metal ball, a suspension device, a variable-friction device and a support; the metal ball is suspended in the support through the suspension device; the variable-friction device is arranged on the two sides of the metal ball oppositely and is installed in the support through a connecting structure; the variable-friction device comprises a limiting plate vertically arranged on one side of the metal ball, an upper friction plate and a lower friction plate arranged on the upper end and the lower end of the limiting plate; the upper friction plate and the lower friction plate arranged along the horizontal direction are connected with the limiting plate through elastic structures; high-damping rubber materials are arranged on the limiting plate, the upper friction plate and the lower friction plate; the variable-friction device is arranged so that the damper has the functions of self-resetting and variable friction; on one hand, the variable-friction device can effectively ensure the post-shock residual deformation of a control structure; on the other hand, the two energy dissipation processes of impact and variable friction can improve the energy dissipation capacity of the damper and effectively reduce the vibration of a building structure.

Description

Technical Field

[0001] This invention relates to the field of structural vibration reduction and damping technology in civil engineering, and in particular to a self-resetting variable friction composite collision pendulum damper. Background Technology

[0002] With the continuous development of society, more and more buildings have been constructed, leading to a surge in research on the seismic resistance of these structures. Earthquakes exert immense destructive force on structures, making the effective improvement of their seismic resistance a significant challenge in civil engineering. In recent years, dampers—an effective seismic-resistant component—have been increasingly widely used. Compared to traditional seismic-resistant structures, dampers do not cause permanent damage to the building itself; they are not structural elements but rather energy-dissipating components. By incorporating damper components into structural buildings, the overall seismic performance of the building can be effectively improved. Among various types of dampers, friction dampers and impact dampers are widely used due to their simple structure and high energy dissipation capacity.

[0003] However, existing dampers are of a single type, with only variable friction or only self-resetting function. Dampers with only variable friction, lacking self-resetting function, cannot control the residual deformation of the structure after an earthquake, affecting the post-earthquake usability of the structure and causing serious economic and time losses. On the other hand, dampers with only self-resetting and no variable friction, if the sliding friction is too large, only provide stiffness under small earthquakes and cannot play a role in energy dissipation and vibration reduction; if the sliding friction is too small, the energy dissipation and vibration reduction effect is too small under large earthquakes and cannot effectively reduce vibration.

[0004] Therefore, it is essential to invent a damper that combines self-resetting and variable friction to achieve a stronger energy dissipation capacity. Summary of the Invention

[0005] This invention provides a self-resetting variable friction composite collision pendulum damper to solve the above-mentioned problems.

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

[0007] A self-resetting variable friction composite collision pendulum damper includes a metal ball, a suspension device, a variable friction device, and a support.

[0008] The metal ball is suspended inside the bracket by a suspension device, and the variable friction device is respectively arranged on both sides of the metal ball. The variable friction device is installed inside the bracket through a connecting structure.

[0009] The variable friction device comprises a limiting plate vertically arranged on one side of the metal ball, an upper friction plate and a lower friction plate arranged on the upper and lower ends of the limiting plate, and the upper and lower friction plates arranged in the horizontal direction are connected with the limiting plate through an elastic structure; the limiting plate, the upper friction plate and the lower friction plate are all provided with high-damping rubber materials;

[0010] When the metal ball swings horizontally under the action of the earthquake force, the metal ball moves towards the limiting plate and collides with the limiting plate, the limiting plate drives the upper friction plate and the lower friction plate to move towards the metal ball after being collided by the metal ball, so that the upper side of the metal ball is in contact with the high-damping rubber material on the bottom surface of the upper friction plate and rubs, and the lower side of the metal ball is in contact with the high-damping rubber material on the top surface of the lower friction plate and rubs; when the metal ball swings to the initial position after being collided, the elastic structure drives the limiting plate, the upper friction plate and the lower friction plate to reset.

[0011] Further, the variable friction device further comprises a side plate, an upper pulling plate, a lower pulling plate and a limiting plate pulling plate;

[0012] The side plate is vertically arranged between the upper friction plate and the lower friction plate, and the side plate is perpendicular to the limiting plate, one side of the side plate away from the metal ball is connected with the support through the connecting structure; the side plate is internally provided with a first sliding groove arranged in the horizontal direction and a second sliding groove and a third sliding groove arranged on the upper and lower sides of the first sliding groove respectively and inclinedly; the limiting plate pulling plate is slidingly installed in the first sliding groove, and one end of the limiting plate pulling plate is connected with the limiting plate; the upper pulling plate is slidingly installed in the second sliding groove, and one end of the upper pulling plate away from the limiting plate pulling plate extends out of the second sliding groove and is connected with the upper friction plate; the lower pulling plate is slidingly installed in the third sliding groove, and one end of the lower pulling plate away from the limiting plate pulling plate extends out of the third sliding groove and is connected with the lower friction plate;

[0013] The middle part of the elastic structure is connected with the limiting plate, and the upper and lower ends thereof are connected with the upper friction plate and the lower friction plate respectively; when the metal ball moves towards the limiting plate and collides with the limiting plate and drives the limiting plate to move away from the side plate, the limiting plate drives the upper pulling plate to slide in the second sliding groove and the lower pulling plate to slide in the third sliding groove through the limiting plate pulling plate and the elastic structure connected with the limiting plate pulling plate, the upper pulling plate drives the upper friction plate to move towards the metal ball and rubs with the upper side of the metal ball, and the lower pulling plate drives the lower friction plate to move towards the metal ball and rubs with the lower side of the metal ball; after the metal ball returns to the original position, the elastic structure drives the limiting plate pulling plate and the limiting plate to reset, and drives the upper friction plate and the lower friction plate to reset through the upper pulling plate and the lower pulling plate.

[0014] Further, the first chute, the second chute and the third chute are all provided with guide columns; the limit plate pulling plate, the upper pulling plate and the lower pulling plate are all provided with long strip-shaped notches and are slidably connected with the guide columns through the long strip-shaped notches.

[0015] Further, the upper pulling plate, the lower pulling plate and the limit plate pulling plate are all provided with protruding columns, and the elastic structure is connected on the protruding columns.

[0016] Further, the variable friction device further comprises a cover plate, the cover plate is installed on the side plate, and the side plate is connected with the connecting structure through the cover plate.

[0017] Further, the upper friction plate is provided with an arc-shaped groove on the side close to the suspension device.

[0018] Further, the suspension device is a flexible rope.

[0019] Further, the suspension device is a cantilever column.

[0020] Further, the elastic structure is a torsion spring.

[0021] The beneficial effects of the present application are:

[0022] The self-resetting variable friction composite impact pendulum damper disclosed in the present application, when the metal ball is horizontally swung by the earthquake force, the metal ball first collides with the high-damping rubber material of the limit plate, the limit plate drives the upper and lower friction plates to move to the high-damping rubber material above to rub with the metal ball after the collision, and the limit plate and the upper and lower friction plates are reset under the action of the elastic structure after the metal ball moves to the initial position; the variable friction device is arranged to make the damper have the functions of self-resetting and variable friction, on the one hand, effectively ensures the post-earthquake residual deformation of the control structure, and on the other hand, the two energy dissipation processes of impact and variable friction can improve the energy dissipation capacity of the damper, and effectively reduce the vibration of the building structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The structure diagram of the self-resetting variable friction composite impact pendulum damper disclosed in the first embodiment of the present application Figure 1 ;

[0025] Figure 2It is a front view of a self-resetting variable friction composite impact pendulum damper structure disclosed in the embodiment of the present application.

[0026] Figure 3 It is a left view of a self-resetting variable friction composite impact pendulum damper structure disclosed in the embodiment of the present application.

[0027] Figure 4 It is a top view of a self-resetting variable friction composite impact pendulum damper structure disclosed in the embodiment of the present application.

[0028] Figure 5 It is a schematic diagram of the internal structure of a side plate of a self-resetting variable friction composite impact pendulum damper structure disclosed in the embodiment of the present application.

[0029] In the figure: 1, metal ball; 2, suspension device; 3, variable friction device; 301, limiting plate; 302, upper friction plate; 302a, arc-shaped groove; 303, lower friction plate; 304, elastic structure; 305, side plate; 305a, first sliding groove; 305b, second sliding groove; 305c, third sliding groove; 306, upper pulling plate; 306a, second notch; 307, lower pulling plate; 307a, third notch; 308, limiting plate pulling plate; 308a, first notch; 309, cover plate; 310, high-damping rubber material; 311, first guide column; 312, second guide column; 313, third guide column; 314, first protruding column; 315, second protruding column; 316, third protruding column; 4, support; 5, connecting structure. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] As Figures 1-4 shown is a self-resetting variable friction composite impact pendulum damper provided by the present embodiment, which comprises a metal ball 1, a suspension device 2, a variable friction device 3 and a support 4.

[0032] The metal ball 1 is suspended inside the support 4 through the suspension device 2, and the variable friction devices 3 are respectively arranged on the two sides of the metal ball 1, i.e. two variable friction devices 3 are symmetrically arranged on the two sides of the metal ball axis, and the variable friction devices 3 are installed in the support 4 through the connecting structure 5.

[0033] The variable friction device 3 comprises a limiting plate 301 vertically arranged on one side of the metal ball, an upper friction plate 302 and a lower friction plate 303 arranged on the upper and lower ends of the limiting plate 301, and the upper and lower friction plates 302 and 303 arranged in the horizontal direction are connected with the limiting plate 301 through an elastic structure 304; the limiting plate 301, the upper friction plate 302 and the lower friction plate 303 are all provided with high-damping rubber material 310;

[0034] When the metal ball 1 swings horizontally under the action of the earthquake force, the metal ball 1 moves towards the limiting plate 301 and collides with the limiting plate 301 (the high-damping rubber material on the limiting plate 301), the limiting plate 301 drives the upper and lower friction plates 302 and 303 to move towards the metal ball 1 after being hit by the metal ball 1, so that the upper side of the metal ball 1 contacts and rubs with the high-damping rubber material on the bottom surface of the upper friction plate 302, and the lower side of the metal ball 1 contacts and rubs with the high-damping rubber material on the top surface of the lower friction plate 303; when the metal ball 1 swings to the initial position after being hit, the elastic structure 304 drives the limiting plate 301 to reset, and the limiting plate 301 drives the upper and lower friction plates 302 and 303 to reset, so as to realize the variable friction and self-resetting of the damper. In this embodiment, the support 4 is a frame structure without a bottom surface.

[0035] The self-resetting variable friction composite impact swing damper disclosed in the application can realize the self-resetting and variable friction functions, effectively ensures the post-earthquake residual deformation of the control structure, improves the energy dissipation capacity of the damper through the two energy dissipation processes of impact and variable friction, and effectively reduces the vibration of the building structure.

[0036] Compared with the ordinary friction damper, the variable friction damper can increase the friction force between the damper and the metal ball with the increase of displacement, and improves the energy dissipation efficiency of the damper; the damper utilizes the impact of the metal ball on the limiting plate when the metal ball moves under the force, so that the upper and lower friction plates move and rub the metal ball, and when the metal ball swings to the initial position after being hit, all the pulling plates return to the original position under the action of the torsion spring, so as to prepare for the next impact and effectively utilize the self-resetting function to increase the energy dissipation efficiency when the metal ball hits the limiting plate; the damper adopts the high-damping rubber material on the surfaces of the limiting plate, the upper friction plate and the lower friction plate, so that the metal ball can dissipate more energy and have better damping performance when colliding with the limiting plate and the upper and lower friction plates; the damper has a relatively simple form, is easy to design, has a relatively low cost, and solves the problems of the traditional damper, such as large overall structure, heavy weight and high cost.

[0037] In specific embodiments, as shown in Figure 5 the variable friction device 3 further comprises a side plate 305, an upper pulling plate 306, a lower pulling plate 307 and a limiting plate pulling plate 308;

[0038] The side plate 305 is vertically arranged between the upper friction plate 302 and the lower friction plate 303, and the side plate 305 is perpendicular to the limiting plate. The side of the side plate away from the metal ball is connected with the support 4 through the connecting structure 5. The side plate is internally provided with a first sliding groove 305a arranged in the horizontal direction, and a second sliding groove 305b and a third sliding groove 305c arranged on the upper and lower sides of the first sliding groove 305a respectively and arranged in an inclined manner. The limiting plate pulling plate 308 is slidingly installed in the first sliding groove 305a, and one end of the limiting plate pulling plate 308 is connected with the limiting plate 301. The upper pulling plate 306 is slidingly installed in the second sliding groove 305b, and one end of the upper pulling plate 306 away from the limiting plate pulling plate 308 extends out of the second sliding groove 305b and is connected with the upper friction plate 302. The lower pulling plate 307 is slidingly installed in the third sliding groove 305c, and one end of the lower pulling plate 307 away from the limiting plate pulling plate 308 extends out of the third sliding groove 305c and is connected with the lower friction plate 303.

[0039] The middle part of the elastic structure 304 is connected with the limiting plate 301, and the upper and lower ends are respectively connected with the upper friction plate 302 and the lower friction plate 303; when the metal ball 1 moves towards the limiting plate and collides with the limiting plate 301 and drives the limiting plate 301 to move away from the side plate 305, the limiting plate drives the elastic structure through the limiting plate pulling plate and the limiting plate pulling plate connected with the limiting plate pulling plate, and simultaneously drives the upper pulling plate 306 to slide in the second sliding groove 305b and the lower pulling plate 307 to slide in the third sliding groove 305c, the upper pulling plate 306 drives the upper friction plate to move towards the metal ball (downwards) and rubs the upper side of the metal ball, and the lower pulling plate 307 drives the lower friction plate to move towards the metal ball (upwards) and rubs the lower side of the metal ball; after the metal ball returns to the original position, the elastic structure 304 drives the limiting plate pulling plate and the limiting plate to reset, and drives the upper pulling plate 306, the lower pulling plate 307, the upper friction plate 302 and the lower friction plate 303 to reset, so as to realize the self-resetting of the device; the metal ball swings to collide with the limiting plate, and after the collision, the limiting plate drives the upper friction plate and the lower friction plate to move through the limiting plate pulling plate 308, the upper pulling plate 306, the lower pulling plate 307 and the elastic structure 304, so that the metal ball contacts the upper friction plate and the lower friction plate and generates variable friction; the damper has two energy consumption processes of collision and variable friction, the energy consumption effect of the damper is greatly improved, effective shock absorption is realized, the damper has self-resetting, can effectively control the post-earthquake residual deformation of the structure, and does not need external force to reset each part of the device to the original position, saves the resetting time of the device, improves the self-resetting efficiency, and saves the structure resetting energy consumption.

[0040] In specific embodiments, the first sliding slot 305a, the second sliding slot 305b and the third sliding slot 305c are each provided with a guide column; the limit plate pulling plate 308, the upper pulling plate 306 and the lower pulling plate 307 are each provided with a long strip-shaped notch, and are slidably connected with the guide column through the long strip-shaped notch. One end of the guide column is fixed on the bottom surface of the sliding slot, and the other end extends out of the long strip-shaped notch. The first sliding slot 305a is provided with a first guide column 311, the limit plate pulling plate 308 is provided with a long strip-shaped first notch 308a, and the limit plate pulling plate 308 is slidably connected with the first guide column 311 through the first notch 308a; the second sliding slot 305b is provided with a second guide column 312, the upper pulling plate 306 is provided with a long strip-shaped second notch 306a, and the upper pulling plate 306 is slidably connected with the second guide column 312 through the second notch 306a; the third sliding slot 305c is provided with a third guide column 313, the lower pulling plate 307 is provided with a long strip-shaped third notch 307a, and the lower pulling plate 307 is slidably connected with the third guide column 313 through the third notch 307a. The guide column is provided to guide the sliding of the pulling plate, the notch is used to realize the sliding of the pulling plate in cooperation with the guide column, and the length of the notch is used to limit the movement distance of the pulling plate. The length of the notch can be set according to actual use requirements.

[0041] In specific embodiments, the upper pulling plate 306, the lower pulling plate 307 and the limit plate pulling plate 308 are each provided with a protruding column, and the elastic structure 304 is connected to the protruding column; the upper pulling plate 306 is provided with a first protruding column 314, the lower pulling plate 307 is provided with a second protruding column 315, the limit plate pulling plate 308 is provided with a third protruding column 316, the middle part of the elastic structure 304 is fixed on the third protruding column 316, and the two ends of the elastic structure 304 are respectively fixed on the first protruding column 314 and the second protruding column 315. The protruding column is provided to facilitate the connection of the elastic structure 304, thereby facilitating the movement and resetting of the limit plate 301, the upper friction plate 302 and the lower friction plate 303.

[0042] In specific embodiments, the variable friction device 3 further comprises a cover plate 309, the cover plate 309 is installed on the side plate 305, the side plate 305 is connected with the connecting structure 5 through the cover plate 309, the cover plate 309 is used to fix the component device in the side plate 305, and facilitates the connection of the side plate 305 and the connecting structure 5.

[0043] In specific embodiments, the upper friction plate 302 is provided with an arc-shaped groove 302a on the side close to the suspension device 2; when the metal ball moves towards the limit plate 301 and collides with the limit plate 301, the arc-shaped groove 302a provides space for the movement of the suspension device. In this embodiment, the arc-shaped groove 302a is a semicircular arc-shaped groove, which facilitates the swinging of the suspension device in the groove.

[0044] In specific embodiments, the suspension device 2 is a flexible rope, i.e. a single pendulum type, which is selected when the damper is installed on a higher building structure, and the formula for calculating the frequency of the damper is:

[0045]

[0046]

[0047] wherein T is the period, f is the frequency, and l is the length of the rope.

[0048] In order to make the frequency of the damper the same as the frequency of the structure, the length of the thin flexible rope should meet formula (2).

[0049] In specific embodiments, the suspension device 2 is a cantilever column, i.e. a cantilever column type, which is selected when the damper is installed on a lower building structure, and the formula for calculating the frequency of the damper is:

[0050]

[0051]

[0052] wherein ω is the circular frequency, k is the stiffness coefficient, δ is the flexibility coefficient, EI is the bending stiffness, m is the mass, and l is the length of the cantilever column.

[0053] In order to make the frequency of the damper the same as the frequency of the structure, the length of the cantilever column should meet formula (4).

[0054] The above formulas (1)-(4) are all existing formulas, and the logic will not be described again.

[0055] In specific embodiments, the elastic structure 304 is a torsion spring.

[0056] When the damper is used, the damper can be installed on the floor of a high-rise building or a part with large vibration, and the length of the suspension device can be determined according to the vibration frequency of the installed building structure, so as to ensure that the swing frequency of the damper is the same as the vibration frequency of the building. Under the action of the earthquake load, the metal ball swings horizontally, the metal ball hits the high-damping rubber material on the limiting plate, the limiting plate drives the limiting plate pull plate to move away from the side plate, so as to drive the upper pull plate to move downward and the lower pull plate to move upward through the torsion spring connected with the limiting plate pull plate, the upper pull plate, and the lower pull plate, so as to make the high-damping rubber material of the upper and lower friction plates rub the metal ball; when the metal ball moves to the initial position, the limiting plate and the limiting plate pull plate return to the original position, and the upper pull plate, the upper friction plate, the lower pull plate, and the lower friction plate also return to the original position through the action of the torsion spring, so as to realize variable friction and self-resetting, and fully improve the energy dissipation and shock absorption efficiency of the damper; the damper has simple structure, convenient installation, maintenance-free, and low cost.

[0057] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A self-centering variable friction composite impact pendulum damper, characterized by, Metal ball (1), suspension device (2), variable friction device (3) and support (4) are included. The metal ball (1) is suspended in the support (4) by the suspension device (2), and the metal ball (1) is provided with the variable friction device (3) on both sides respectively, and the variable friction device (3) is installed in the support (4) by the connecting structure (5); The variable friction device (3) includes a limiting plate (301) vertically arranged on one side of the metal ball, and an upper friction plate (302) and a lower friction plate (303) arranged on the upper and lower ends of the limiting plate (301), the upper friction plate (302) and the lower friction plate (303) arranged in the horizontal direction are connected with the limiting plate (301) through the elastic structure (304); the limiting plate (301), the upper friction plate (302) and the lower friction plate (303) are all provided with high-damping rubber material (310); the upper friction plate (302) is provided with an arc-shaped groove (302a) close to one side of the suspension device (2); When the metal ball (1) swings horizontally under the action of earthquake force, the metal ball (1) moves towards the limiting plate (301) and hits the limiting plate (301), the limiting plate (301) is driven to move the upper friction plate (302) and the lower friction plate (303) towards the metal ball (1) after being hit by the metal ball (1), so that the upper side of the metal ball (1) contacts and rubs with the high-damping rubber material on the bottom surface of the upper friction plate (302), and the lower side of the metal ball (1) contacts and rubs with the high-damping rubber material on the top surface of the lower friction plate (303); when the metal ball (1) swings to the initial position after being hit, the elastic structure (304) drives the limiting plate (301), the upper friction plate (302) and the lower friction plate (303) to reset; The suspension device (2) is a flexible rope.

2. A self-centering variable friction composite impact pendulum damper according to claim 1, characterized in that The variable friction device (3) further includes a side plate (305), an upper pulling plate (306), a lower pulling plate (307) and a limiting plate pulling plate (308). The side plate (305) is vertically arranged between the upper friction plate (302) and the lower friction plate (303), and the side plate (305) is perpendicular to the limiting plate, and the side plate is connected with the support (4) through the connecting structure (5) away from the metal ball; the side plate is internally provided with a first sliding groove (305a) arranged in the horizontal direction, and a second sliding groove (305b) and a third sliding groove (305c) arranged on the upper and lower sides of the first sliding groove respectively and arranged in an inclined manner; the limiting plate pulling plate (308) is slidingly installed in the first sliding groove (305a), and one end of the limiting plate pulling plate (308) is connected with the limiting plate (301); the upper pulling plate (306) is slidingly installed in the second sliding groove (305b), one end of the upper pulling plate (306) away from the limiting plate pulling plate (308) extends out of the second sliding groove (305b) and is connected with the upper friction plate (302); the lower pulling plate (307) is slidingly installed in the third sliding groove (305c), and one end of the lower pulling plate (307) away from the limiting plate pulling plate (308) extends out of the third sliding groove (305c) and is connected with the lower friction plate (303). The middle part of the elastic structure (304) is connected with the limiting plate (301), and the upper and lower ends are connected with the upper friction plate (302) and the lower friction plate (303) respectively; when the metal ball (1) moves towards the limiting plate and collides with the limiting plate (301) and drives the limiting plate (301) to move away from the side plate (305), the limiting plate drives the upper pulling plate (306) to slide in the second sliding groove (305b) and the lower pulling plate (307) to slide in the third sliding groove (305c) through the limiting plate pulling plate and the elastic structure connected with the limiting plate pulling plate simultaneously, the upper pulling plate (306) drives the upper friction plate to move towards the metal ball and rubs the upper side of the metal ball, and the lower pulling plate (307) drives the lower friction plate to move towards the metal ball and rubs the lower side of the metal ball; after the metal ball returns to the original position, the elastic structure (304) drives the limiting plate pulling plate and the limiting plate to reset, and drives the upper friction plate (302) and the lower friction plate (303) to reset through the driving of the upper pulling plate (306) and the lower pulling plate (307).

3. A self-centering variable friction composite impact pendulum damper according to claim 2, characterized in that The first sliding groove (305a), the second sliding groove (305b) and the third sliding groove (305c) are all provided with guide columns; the limiting plate pulling plate (308), the upper pulling plate (306) and the lower pulling plate (307) are all provided with long strip-shaped notches, and are slidingly connected with the guide columns through the long strip-shaped notches.

4. A self-centering variable friction composite impact pendulum damper according to claim 2, characterized in that The upper pulling plate (306), the lower pulling plate (307) and the limiting plate pulling plate (308) are all provided with protruding columns, and the elastic structure (304) is connected on the protruding columns.

5. A self-centering variable friction composite impact pendulum damper according to claim 2, characterized in that The variable friction device (3) further comprises a cover plate (309), and the cover plate (309) is installed on the side plate (305), and the side plate (305) is connected with the connecting structure through the cover plate (309).

6. A self-centering variable friction composite impact pendulum damper according to claim 1, characterized in that The suspension device (2) is a cantilever column.

7. A self-centering variable friction composite impact pendulum damper according to claim 1, characterized in that, The elastic structure (304) is a torsion spring.

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