CN110700429A - A kind of SMA composite universal suspension damping device - Google Patents

Abstract

The invention discloses an SMA composite universal suspension damping device, comprising a fixed support device, the fixed support device is a three-dimensional structure with five sides closed and one open side and an internal cavity, and the mass oscillator is connected with the support device through a pendulum rod. The wire-wire cable connection device is composed of SMA wire and wire rope connected by wire cable conversion head. The SMA wire end of each wire-wire cable connecting device is connected to the slider through the baffle plate, the wire end is diverted through the upper steering pulley, and is fixedly connected to the external structure by the wire cable channel passing device. The invention combines the suspension damping system with the SMA wire, uses the wire-steel cable connecting device to connect with the interior of the structure, transmits the inertial force of the suspension damping system to the structure through the wire-steel cable connecting device, and uses the SMA wire at the same time. The phase transition pseudoelasticity provides damping to achieve the purpose of energy dissipation and shock absorption. The device has the characteristics of simple manufacture, convenient and flexible arrangement, etc., and can effectively reduce the seismic response of the structure.

Description

A kind of SMA composite universal suspension damping device

technical field

The invention belongs to the technical field of vibration damping devices, and in particular relates to an SMA composite universal suspension damping device.

Background technique

As a historical and religious building, the ancient pagoda is a precious historical and cultural heritage of all mankind. The ancient pagoda buildings of different ages reflect the construction technology and the level of science and technology under the historical conditions at that time, and record the production and life information at that time. Therefore, the ancient pagoda is not only of great significance to the study of the development history of ancient Chinese architecture, but also of extraordinary value to the study of ancient Chinese history, culture, religion, politics, art and economic exchanges.

At present, most of the existing ancient pagoda structures in my country have been built for a long time, and the natural disasters and man-made damages are relatively serious, and the ability to resist disasters is poor, so dynamic disaster protection is urgently needed. However, due to the particularity of the protection of the ancient pagoda structure, many problems, especially the shock absorption technology and protection theory of the ancient pagoda structure, are still not perfect, and the existing technology needs to be improved.

The ancient pagoda historical buildings are different from modern buildings. The shock absorption protection of ancient pagodas should follow the principle of protection and restoration of ancient buildings, and large-scale destructive reinforcement cannot be carried out. Therefore, external damping and shock absorption devices are used to shock the ancient pagoda structure. Reinforcement is the ideal method.

The suspension damping system is a damping system that can be installed inside the ancient pagoda structure. The suspension damping system is a structural damping system based on the passive control principle. Its working principle is: when the structure produces a vibration response due to external excitation, the structural vibration drives the pendulum mass vibrator to swing, and the vibration of the mass vibrator is fed back to the structure. A control force, so as to achieve the effect of shock absorption. However, if the suspension damping system is separately installed on the inner floor of the ancient pagoda structure, the suspension damping system has less shock absorption effect on the ancient pagoda structure due to its own characteristics. Therefore, if the suspension damping system is combined with SMA wire, and the wire-steel cable is used to connect the inside of the ancient pagoda structure, and develop a SMA composite suspension damping device with good performance, the inertial force of the suspension damping system can be passed through. The wire-steel cable is transmitted to the ancient pagoda structure, and at the same time, the SMA wire in the SMA composite suspension damping device can be used to provide damping, so as to achieve the purpose of energy dissipation and shock absorption, thereby significantly reducing the seismic response of the ancient pagoda structure.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an SMA composite universal suspension damping device, which has good damping effect and damping stability, and can effectively prevent the destruction of historical buildings under the action of strong earthquakes.

The technical solution adopted in the present invention is that an SMA composite universal suspension damping device includes a fixed support device. The fixed support device is a three-dimensional structure with five sides closed and one open side and an internal cavity. The fixed support device is suspended and connected with a For the mass vibrator, several evenly distributed wire-wire cable connection devices are fixed on the periphery of the mass vibrator, and each wire-wire cable connection device is arranged in a circular manner in the fixed support device; The device is connected to the external structure, the bottom plate of the fixed support device is fixed with an annular baffle with a slot in the middle, and the middle of the baffle is provided with a slider that can move along the bottom plate of the fixed support device, and the downward end of each wire-wire cable connecting device passes through The slot of the baffle is attached to the slider.

The present invention is also characterized in that,

The wire-wire cable connection device includes SMA wire and wire rope. The SMA wire and the wire rope are connected by the wire rope conversion head; the end of the SMA wire away from the wire conversion head is connected to the slider through the baffle plate, and the wire rope is far away from the wire rope. One end of the conversion head passes through the fixed support device and is connected with the external structure.

The fixed support device includes an upper limit plate, a lower limit plate and a three-sided enclosure plate that are oppositely arranged up and down; the upper limit plate, the lower limit plate, and the three-sided enclosure plate are spliced end to end to form a structure with five sides closed on one side and an internal cavity; The baffle plate is fixed on the lower limit plate, and the upper limit plate is provided with a plurality of steel cable channels, and each steel cable is connected to the external structure through the steel cable channels.

Bottom turning pulleys are also arranged on the edges of both sides of the lower limit plate, each bottom turning pulley is located on the outer side of the annular baffle, and the SMA wire is turned through the bottom turning pulley and then passes through the baffle and is fixedly connected to the slider.

The middle part of the upper limit plate is vertically fixed with a universal hinge, and the mass oscillator is connected with the universal hinge through a pendulum rod; the upper end of the pendulum rod is provided with a circular penetration hole, which can freely penetrate the rotating shaft of the universal hinge.

The upper diverting pulleys are arranged symmetrically on both sides of the upper limit plate. One end of the wire rope passes through the upper diverting pulley and then passes through the wire rope channel to connect with the external structure. The four corners of the lower limit plate are provided with waist-shaped holes, which are connected to the external structure through countersunk head bolts and nuts. .

The outside of the fixed support device is also provided with a dust shield, the three-sided enclosure plates are welded by three steel plates, and the middle of the two vertical steel plates is provided with a connecting buckle connected to the dust shield.

The upper part of the mass oscillator is symmetrically arranged with a plurality of threaded holes, and the lower end of the pendulum rod is provided with threads adapted to the threaded holes.

Outrigger plates are arranged on both sides of the lower part of the mass oscillator; rubber gasket layers are arranged on the inner side of the outrigger plates.

A dust shield is arranged on the opening side of the fixed support device, and the three-sided enclosure plate is welded by three steel plates, and the middle of each steel plate is provided with a connecting buckle connected to the dust shield.

The beneficial effect of the SMA composite universal suspension damping device of the present invention is that the suspension damping device of the present invention combines the suspension damping system with the SMA wire, and uses the wire-steel cable connecting device to connect with the interior of the structure , the inertial force of the suspension damping system is transmitted to the structure through the wire-wire cable connection device, and the phase transition pseudo-elasticity of the SMA wire is used to provide damping, so as to achieve the purpose of energy dissipation and damping. The device has the characteristics of simple manufacture, convenient and flexible arrangement, etc., and can effectively reduce the seismic response of the structure.

Description of drawings

Fig. 1 is the sectional view of a kind of SMA composite universal suspension damping device of the present invention;

FIG. 2 is a side view of an SMA composite gimbal suspension damping device of the present invention.

In the figure, 1. Upper limit plate, 2. Lower limit plate, 3. Three-sided enclosure plate, 4. Universal hinge, 6. Upper turning pulley, 7. Baffle plate, 8. Bottom turning pulley, 9. Waist hole , 10. Connection buckle, 11. Swing rod, 12. SMA wire, 13. Wire cable conversion head, 14. Steel cable, 15. Rubber gasket layer, 100. Fixed support device, 200. Mass vibrator, 300. Slider , 400. Wire - cable connection device, 500. Dust cover.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

An SMA composite universal suspension damping device, the structure is shown in Figure 1, including a fixed support device 100, the fixed support device 100 is a three-dimensional structure with five sides closed and one side open, and an internal cavity, and the fixed support device 100 is suspended within the connection. There is a mass vibrator 200, and several evenly distributed wire-wire cable connection devices are fixed on the periphery of the mass vibrator 200, and each wire-wire cable connection device 400 is arranged in a circular manner in the fixed support device 100; the wire-wire cable connection device The fixed support device 100 is upwardly penetrated and connected to the external structure. The bottom plate of the fixed support device 100 is fixed with an annular baffle 7 with a slot in the middle. - The downward end of the wire cable connecting device is connected to the slider 300 through the slot of the baffle plate 7 .

The wire-wire cable connection device 400 includes the SMA wire 12 and the wire rope 14, and the SMA wire 12 and the wire rope 14 are connected by the wire rope conversion head 13; the end of the SMA wire 12 away from the wire rope conversion head 13 passes through the baffle 7 and The slider 300 is connected, and the end of the wire 14 away from the wire conversion head 13 is passed through the fixed support device 100 and connected to the external structure.

The fixed support device 100 includes an upper limit plate 1 , a lower limit plate 2 and a three-sided enclosure plate 3 that are oppositely arranged up and down; the upper limit plate 1 , the lower limit plate 2 , and the three-sided enclosure plate 3 are formed by end-to-end splicing to form a five-sided closed side opening. , The structure of the internal cavity; the baffle plate 7 is fixed on the lower limit plate 2, and the upper limit plate 1 is provided with a number of steel cable channels, and each steel cable 14 is connected to the external structure through the steel cable channel. The lower limit plate is the bottom plate of the fixed support device.

The edge portions on both sides of the lower limit plate 2 are also provided with bottom diverting pulleys 8, each bottom diverting pulley 8 is located on the outer side of the annular baffle 7 respectively, and the SMA wire 12 is diverted by the bottom diverting pulley 8 and then passes through the baffle and the slider 300. Fixed connection.

The middle part of the upper limit plate 1 is vertically fixed with a universal hinge 4, and the mass oscillator 200 is connected with the universal hinge 4 through a swing rod 11; the upper end of the swing rod 11 is provided with a circular penetration hole, which can freely penetrate into the rotating shaft of the universal hinge 4 .

The upper diverting pulleys 6 are symmetrically arranged on both sides of the upper limit plate 1, one end of the wire rope 14 passes through the upper diverting pulley 6 and then passes through the wire rope channel to be connected to the external structure, and waist-shaped holes 9 are arranged at the four corners of the lower limit plate, through which the countersunk head bolts The nut is attached to the outer structure. The steel cable 14 is diverted by the upper steering pulley 6, and is fixedly connected with the top concrete beam slab or the bottom concrete beam slab of a certain layer of the structure through the steel cable channel passing device through countersunk bolts and nuts.

The outside of the fixed support device 100 is also provided with a dust shield 500 (as shown in FIG. 2 ), the three-sided enclosure plate 3 is welded by three steel plates, and the middle of the two vertical steel plates is provided with a connection buckle connected to the dust shield 500 10.

The upper part of the mass vibrator 200 is symmetrically provided with a plurality of threaded holes, and the lower end of the pendulum rod 11 is provided with threads adapted to the threaded holes.

Outrigger plates are provided on both sides of the lower part of the mass oscillator 200 ; a rubber gasket layer 15 is arranged on the inner side of the outrigger plate.

A dust shield 500 is provided on the opening side of the fixed support device 100 for dust prevention. The three-sided enclosure plate 3 is welded by three steel plates. The middle of each steel plate is provided with a connecting buckle 10 connected to the dust shield 500 .

The SMA wire 12 is austenite at room temperature, and the pseudo-elasticity of the austenitic SMA wire at room temperature is used to provide damping, so as to achieve the purpose of energy dissipation and shock absorption.

The sliding block 300 is located on the lower limit plate 2 , the pre-tensioning reaction force of the SMA wire 12 in the wire-wire cable connecting device 400 is provided by the baffle 7 , and the sliding block 300 is in close contact with the baffle 7 after pre-tensioning.

Take one cycle as an example to illustrate the SMA composite suspension damping device: when the seismic action is small, the mass oscillator does not contact the slider and can swing freely, and the reverse inertial force acts on the structure through the rigid fixed support device ; When the tower body is greatly affected by the earthquake, the mass vibrator and the slider move together. If the structure vibrates to the right, the mass vibrator will swing to the left and drive the slider to move to the right as a whole, pulling the SMA wire on the right. A relative displacement occurs. At this time, the SMA wire on the left is still in a static state. When the mass oscillator returns to the equilibrium position, the SMA wire returns to the initial pre-tensioned state. The SMA wire on the right undergoes an energy consumption cycle process, forming a comparison The full hysteresis curve realizes the energy dissipation and shock absorption of the structure. At the same time, the inertial force of the mass oscillator acts on the structure through the steel cable, which inhibits the seismic response of the structure, so that the seismic response of the structure is attenuated. In the same way, the principle is the same when the mass oscillator moves in other directions. The invention is simple in manufacture, convenient and flexible in arrangement, abides by the principle of "repairing the old as old" for ancient building protection, and can effectively reduce the earthquake response of the ancient pagoda structure.

The specific implementation examples described above are only illustrative of the formula of this patent, and do not limit the scope of this patent. Without departing from the design spirit of this patent, those of ordinary skill in the art can make various Variations and improvements all fall within the scope of protection determined by the claims of this patent.

Claims (10)

1. The SMA composite universal suspension and oscillation damping device is characterized by comprising a fixed supporting device (100), wherein the fixed supporting device (100) is of a three-dimensional structure with five closed surfaces and one open surface and an internal cavity, a mass oscillator (200) is connected in the fixed supporting device (100) in a hanging manner, a plurality of wire-steel cable connecting devices which are uniformly distributed are fixed on the periphery of the mass oscillator (200), and the wire-steel cable connecting devices (400) are arranged in the fixed supporting device (100) in a circumferential manner; the wire-steel cable connecting device penetrates out of the fixed supporting device (100) upwards to be connected with an external structure, a bottom plate of the fixed supporting device (100) is fixedly provided with an annular baffle (7) with a groove in the middle, a sliding block (300) capable of moving along the bottom plate of the fixed supporting device (100) is arranged in the middle of the baffle (7), and one downward end of each wire-steel cable connecting device penetrates through the groove of the baffle (7) to be connected onto the sliding block (300).

2. The SMA composite universal suspension damping device according to claim 1, wherein: the wire-steel cable connecting device (400) comprises an SMA wire (12) and a steel cable (14), wherein the SMA wire (12) and the steel cable (14) are connected through a wire cable conversion head (13); one end of the SMA wire (12) far away from the wire cable conversion head (13) penetrates through the baffle (7) to be connected with the sliding block (300), and one end of the steel cable (14) far away from the wire cable conversion head (13) penetrates out of the fixed supporting device (100) to be connected with an external structure.

3. The SMA composite universal suspension damping device according to claim 2, wherein: the fixed supporting device (100) comprises an upper limiting plate (1), a lower limiting plate (2) and a three-side enclosure plate (3) which are arranged oppositely up and down; the upper limiting plate (1), the lower limiting plate (2) and the three-side enclosure plate (3) are spliced end to form a structure with five closed sides and an opening at one side and an internal cavity; the baffle (7) is fixed on the lower limiting plate (2), the upper limiting plate (1) is provided with a plurality of steel cable channels, and the steel cables (14) penetrate through the steel cable channels and are connected to an external structure.

4. The SMA composite universal suspension damping device according to claim 3, wherein: the edge parts of two sides of the lower limiting plate (2) are also provided with bottom diverting pulleys (8), each bottom diverting pulley (8) is respectively positioned at the outer side of the annular baffle (7), and the SMA wires (12) are diverted through the bottom diverting pulleys (8) and then penetrate through the baffle to be fixedly connected with the sliding block (300).

5. The SMA composite universal suspension damping device according to claim 3, wherein: a universal hinge (4) is vertically fixed in the middle of the upper limiting plate (1), and the mass vibrator (200) is connected with the universal hinge (4) through a swing rod (11); the upper end of the swing rod (11) is provided with a circular through hole which can freely penetrate through a rotating shaft of the universal hinge (4).

6. The SMA composite universal suspension damping device according to claim 3, wherein: go up spacing board (1) both sides edge symmetrical arrangement upper portion diverting pulley (6), cable wire (14) one end passes through cable wire passageway again behind upper portion diverting pulley (6) and links to each other with exterior structure, spacing board four corners position sets up waist shape hole (9) down, links to each other with exterior structure through countersunk head bolt nut.

7. The SMA composite universal suspension damping device according to claim 3, wherein: the fixed supporting device (100) is further provided with a dust cover (500) outside, the three-sided enclosure plate (3) is formed by welding three steel plates, and the middle parts of the two vertical steel plates are provided with connecting buckles (10) connected with the dust cover (500).

8. The SMA composite universal suspension damping device according to claim 4, wherein: the upper part of the mass oscillator (200) is symmetrically provided with a plurality of threaded holes, and the lower end of the swing rod (11) is provided with threads matched with the threaded holes.

9. The SMA composite universal suspension damping device according to claim 5, wherein: two sides of the lower part of the mass oscillator (200) are provided with outward extending plates; and a rubber gasket layer (15) is arranged on the inner side of the overhanging plate.

10. The SMA composite universal suspension damping device according to claim 3, wherein: the dustproof dust hood (500) is arranged on one side of an opening of the fixed supporting device (100), the three-sided enclosure plate (3) is formed by welding three steel plates, and a connecting buckle (10) connected with the dust hood (500) is arranged in the middle of each steel plate.

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