CN110700429A - SMA composite universal suspension damping device - Google Patents
SMA composite universal suspension damping device Download PDFInfo
- Publication number
- CN110700429A CN110700429A CN201910887694.8A CN201910887694A CN110700429A CN 110700429 A CN110700429 A CN 110700429A CN 201910887694 A CN201910887694 A CN 201910887694A CN 110700429 A CN110700429 A CN 110700429A
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- wire
- sma
- steel cable
- fixed supporting
- supporting device
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
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- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses an SMA composite universal suspension pendulum damping device which comprises a fixed supporting device, wherein the fixed supporting device is of a three-dimensional structure with five closed surfaces and one open surface and an internal cavity, and a mass oscillator is connected with the supporting device through a swing rod. The wire-steel cable connecting device is formed by connecting SMA wires and steel cables through wire cable conversion heads. The SMA wire end of each wire-steel cable connecting device passes through the baffle and is connected with the sliding block, and the steel cable end is turned by the upper turning pulley and penetrates out of the device through the steel cable channel to be fixedly connected with an external structure. The invention combines the suspension pendulum damping system with the SMA wire, utilizes the wire-steel cable connecting device to connect with the interior of the structure, transfers the inertia force of the suspension pendulum damping system to the structure through the wire-steel cable connecting device, and simultaneously utilizes the phase change pseudo-elasticity of the SMA wire to provide damping, thereby achieving the purposes of energy dissipation and shock absorption. The device has the characteristics of simple manufacture, convenient and flexible arrangement and the like, and can effectively reduce the earthquake response of the structure.
Description
Technical Field
The invention belongs to the technical field of vibration reduction devices, and particularly relates to an SMA composite universal suspension vibration reduction device.
Background
The ancient pagoda is a historical religious building and is a precious historical cultural heritage of all mankind. The ancient pagoda buildings of different ages reflect the construction process and the scientific and technical level under the current historical conditions, and record the current production and living information. Therefore, the ancient towers have great significance for researching the development history of ancient buildings in China, and have remarkable value for researching the ancient history, culture, religion, politics, art, economic communication and the like in China.
At present, most of the existing ancient tower structures in China are built for a long time, natural disasters and artificial damages are serious, the anti-disaster capability is poor, and dynamic disaster protection is urgently needed. However, due to the particularity of the protection of the ancient tower structure, many problems, especially the damping technology and protection theory of the ancient tower structure, are still imperfect, and the prior art needs to be improved.
The historic building of the ancient towers is different from the modern building, the principle of ancient building protection and restoration is followed when the ancient building is subjected to shock absorption protection, large-area destructive reinforcement cannot be carried out on the ancient building, and therefore the method for carrying out shock absorption and reinforcement on the ancient tower structure by utilizing the external damping shock absorption device is an ideal method.
The pendulum damping system is a damping system that can be placed inside the ancient tower structure. The suspension pendulum damping system is a structural damping system based on a passive control principle, and the working principle is as follows: when the structure generates a vibration response due to external excitation, the structure vibrates to drive the pendulum mass oscillator to swing, and the swing of the mass oscillator feeds back a control force to the structure, so that the effect of shock absorption is achieved. However, if set up the pendulum shock mitigation system on the inside floor of ancient tower structure alone, the pendulum shock mitigation system is less because the cushioning effect that self characteristics played the ancient tower structure. Therefore, if the suspension pendulum damping system is combined with the SMA wire, the SMA composite suspension pendulum damping device with good performance is developed by utilizing the internal connection of the wire-steel cable and the ancient tower structure, the inertia force of the suspension pendulum damping system can be transmitted to the ancient tower structure through the wire-steel cable, and simultaneously, the SMA wire in the SMA composite suspension pendulum damping device can be utilized to provide damping, so that the purposes of energy dissipation and shock absorption are achieved, and the seismic response of the ancient tower structure is obviously reduced.
Disclosure of Invention
The invention aims to provide an SMA composite universal suspension pendulum damping device which has good damping effect and damping stability and can effectively prevent a historical building from being damaged under the action of strong shock.
The technical scheme adopted by the invention is that the SMA composite universal suspension pendulum damping device comprises a fixed supporting device, wherein the fixed supporting device is a three-dimensional structure with five closed surfaces and one open surface and an internal cavity, a mass oscillator is connected in the fixed supporting device in a hanging manner, a plurality of uniformly distributed wire-steel cable connecting devices are fixed on the periphery of the mass oscillator, and the wire-steel cable connecting devices are arranged in the fixed supporting device in a circumferential manner; the wire-steel cable connecting devices penetrate out of the fixed supporting device upwards to be connected with an external structure, an annular baffle plate with a groove in the middle is fixed on a bottom plate of the fixed supporting device, a sliding block capable of moving along the bottom plate of the fixed supporting device is arranged in the middle of the baffle plate, and one downward end of each wire-steel cable connecting device penetrates through the groove of the baffle plate to be connected onto the sliding block.
The present invention is also characterized in that,
the wire-steel cable connecting device comprises an SMA wire and a steel cable which are connected through a wire cable conversion head; one end of the SMA wire, which is far away from the wire rope conversion head, penetrates through the baffle to be connected with the sliding block, and one end of the steel rope, which is far away from the wire rope conversion head, penetrates out of the fixed supporting device to be connected with an external structure.
The fixed supporting device comprises an upper limiting plate, a lower limiting plate and a three-side enclosure plate which are oppositely arranged up and down; the upper limiting plate, the lower limiting plate and the three-side enclosure plate are spliced end to form a structure with five closed sides and an opening at one side and an internal cavity; the baffle is fixed on lower limiting plate, goes up to set up on the limiting plate and has seted up a plurality of cable wire passageway, and each cable wire passes the cable wire passageway and connects on external structure.
Bottom diverting pulleys are arranged at the edge parts of two sides of the lower limiting plate, each bottom diverting pulley is respectively positioned at the outer side of the annular baffle, and the SMA wire is diverted through the bottom diverting pulleys and then penetrates through the baffle to be fixedly connected with the sliding block.
A universal hinge is vertically fixed in the middle of the upper limiting plate, and the mass vibrator is connected with the universal hinge through a swing rod; the upper end of the swing rod is provided with a round through hole which can freely penetrate through a rotating shaft of the universal hinge.
Upper steering pulleys are symmetrically arranged on two side edges of the upper limiting plate, one end of the steel cable passes through the upper steering pulleys and then passes through the steel cable channel to be connected with an external structure, and waist-shaped holes are formed in four corners of the lower limiting plate and are connected with the external structure through countersunk bolts and nuts.
The fixed supporting device is also provided with a dust cover outside, the three-side enclosure plate is formed by welding three steel plates, and the middle parts of the two vertical steel plates are provided with connecting buckles connected with the dust cover.
The upper part of the mass oscillator is symmetrically provided with a plurality of threaded holes, and the lower end of the swing rod is provided with threads matched with the threaded holes.
Both sides of the lower part of the mass oscillator are provided with outward extending plates; the inner side of the overhanging plate is provided with a rubber gasket layer.
A dustproof dust cover is arranged on one side of the opening of the fixed supporting device, the three-sided enclosure plate is formed by welding three steel plates, and the middle of each steel plate is provided with a connecting buckle connected with the dust cover.
The suspension damping device has the advantages that the suspension damping system is combined with the SMA wire, the wire-steel cable connecting device is connected with the interior of the structure, the inertia force of the suspension damping system is transmitted to the structure through the wire-steel cable connecting device, and meanwhile, damping is provided by the phase change pseudo-elasticity of the SMA wire, so that the purposes of energy dissipation and damping are achieved. The device has the characteristics of simple manufacture, convenient and flexible arrangement and the like, and can effectively reduce the earthquake response of the structure.
Drawings
FIG. 1 is a cross-sectional view of an SMA composite gimbal 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, an upper limiting plate, 2, a lower limiting plate, 3, a three-side apron plate, 4, a universal hinge, 6, an upper steering pulley, 7, a baffle, 8, a bottom steering pulley, 9, a kidney-shaped hole, 10, a connecting buckle, 11, a swing rod, 12, an SMA wire, 13, a wire cable conversion head, 14, a steel cable, 15, a rubber gasket layer, 100, a fixed supporting device, 200, a mass vibrator, 300, a sliding block, 400, a wire-steel cable connecting device and 500, a dust cover.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A SMA composite universal suspension and oscillation damping device is structurally shown in figure 1 and comprises a fixed supporting device 100, wherein the fixed supporting device 100 is 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 uniformly distributed wire-steel cable connecting devices 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 devices penetrate through the fixed supporting device 100 upwards to be connected with an external structure, a ring-shaped baffle 7 with a groove in the middle is fixed on a bottom plate of the fixed supporting device 100, 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 with the sliding block 300.
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 rope switching 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 rope switching head 13 penetrates out of the fixed supporting device 100 to be connected with an external structure.
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 oppositely arranged 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, a plurality of steel cable channels are arranged on the upper limiting plate 1, and each steel cable 14 penetrates through the steel cable channels to be connected to the external structure. The lower limiting plate is a bottom plate for fixing the supporting device.
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 wire 12 is diverted through the bottom diverting pulleys 8 and then penetrates through the baffle to be fixedly connected with the sliding block 300.
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 round through hole which can freely penetrate through the rotating shaft of the universal hinge 4.
Upper diverting pulleys 6 are symmetrically arranged on the two side edges of the upper limiting plate 1, one end of a steel cable 14 passes through the upper diverting pulleys 6 and then passes through a steel cable channel to be connected with an external structure, and waist-shaped holes 9 are formed in the four corners of the lower limiting plate and are connected with the external structure through countersunk bolts and nuts. The steel cable 14 passes through the upper steering pulley steering wheel 6 and penetrates out of the device through the steel cable channel to be fixedly connected with a top concrete beam plate or a bottom concrete beam plate of a certain layer of the structure through a countersunk head bolt and nut.
The fixed supporting device 100 is further provided with a dust cover 500 (as shown in fig. 2) 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.
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.
The two sides of the lower part of the mass oscillator 200 are provided with outward extending plates; the inner side of the overhanging plate is provided with a rubber gasket layer 15.
The dust-proof cover 500 is arranged on one side of the opening of the fixed supporting device 100, the three-sided enclosure plate 3 is formed by welding three steel plates, and the middle part of each steel plate is provided with a connecting buckle 10 connected with the dust-proof cover 500.
The SMA wire 12 is austenite at normal temperature, and the phase-change pseudo-elasticity of the austenite SMA wire at normal temperature is utilized to provide damping, so that the purposes of energy dissipation and shock absorption are achieved.
The sliding block 300 is positioned on the lower limiting plate 2, the pretensioning reaction force of the SMA wire 12 in the wire-steel cable connecting device 400 is provided by the baffle 7, and the sliding block 300 is tightly attached to the baffle 7 after pretensioning.
The SMA composite suspended pendulum damping device is described by taking one cycle as an example: when the earthquake action is small, the mass oscillator is not in contact with the sliding block and can freely swing, and the reverse inertia force acts on the structure through the rigid fixed supporting device; when the tower body is greatly influenced by earthquake, the mass oscillator and the sliding block move together, if the structure vibrates rightwards, the mass oscillator swings leftwards and drives the sliding block to move rightwards integrally, the SMA wire on the right side is pulled to generate relative displacement, the SMA wire on the left side is still in a static state at the moment, when the mass oscillator restores to a balance position, the SMA wire returns to an initial pre-tensioned state, the SMA wire on the right side undergoes an energy consumption circulation process to form a relatively full hysteretic curve, energy dissipation and shock absorption of the structure are realized, meanwhile, the inertia force of the mass oscillator is reacted on the structure through the steel cable to generate an inhibiting effect on the earthquake response of the structure, and the earthquake response of the structure is attenuated. Similarly, the principle of the mass oscillator moving to other directions is the same. The invention has simple manufacture and convenient and flexible arrangement, complies with the principle of 'old as old' ancient architecture protection, and can effectively reduce the earthquake response of the ancient tower structure.
The above-mentioned embodiments are merely illustrative of the present patent, and do not limit the scope of the patent, and various modifications and improvements of the technical solutions of the patent will be made by those skilled in the art without departing from the spirit of the patent design, and the scope of the patent is defined by the claims.
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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910887694.8A CN110700429A (en) | 2019-09-19 | 2019-09-19 | SMA composite universal suspension damping device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910887694.8A CN110700429A (en) | 2019-09-19 | 2019-09-19 | SMA composite universal suspension damping device |
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| CN110700429A true CN110700429A (en) | 2020-01-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282473A (en) * | 2020-10-29 | 2021-01-29 | 北京工业大学 | Shape memory alloy semi-active tuned mass damper |
| CN115903007A (en) * | 2022-12-27 | 2023-04-04 | 中国地质调查局油气资源调查中心 | Three-dimensional earthquake physical simulation data acquisition device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112282473A (en) * | 2020-10-29 | 2021-01-29 | 北京工业大学 | Shape memory alloy semi-active tuned mass damper |
| CN112282473B (en) * | 2020-10-29 | 2022-05-17 | 北京工业大学 | Shape memory alloy semi-active tuned mass damper |
| CN115903007A (en) * | 2022-12-27 | 2023-04-04 | 中国地质调查局油气资源调查中心 | Three-dimensional earthquake physical simulation data acquisition device |
| CN115903007B (en) * | 2022-12-27 | 2023-11-10 | 中国地质调查局油气资源调查中心 | Three-dimensional earthquake physical simulation data acquisition device |
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