CN101851963A - Piezoelectric-SMA composite variable friction intelligent damper - Google Patents

Piezoelectric-SMA composite variable friction intelligent damper Download PDF

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CN101851963A
CN101851963A CN 201010208437 CN201010208437A CN101851963A CN 101851963 A CN101851963 A CN 101851963A CN 201010208437 CN201010208437 CN 201010208437 CN 201010208437 A CN201010208437 A CN 201010208437A CN 101851963 A CN101851963 A CN 101851963A
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plate
sma
damper
driver
fixed
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CN101851963B (en
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戴纳新
谭平
周福霖
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Hunan University
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Hunan University
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Abstract

The invention discloses a piezoelectric-SMA composite variable friction intelligent damper, belonging to the field of civil engineering structure vibration damping control. The piezoelectric-SMA composite variable friction intelligent damper comprises an upper cover plate and a lower connecting fixed plate, wherein a driver horizontal locating plate fixedly connected with the upper part structure of a vibration isolating layer is positioned between the upper cover plate and the lower connecting fixed plate; the driver horizontal locating plate is provided with a plurality of SMA wire adjusting valves along the vertical direction; a plurality of SMA wires are arranged between the upper cover plate and the lower connecting fixed plate; the two ends of each SMA wire are respectively fixed on the upper cover plate and the lower connecting fixed plate; the SMA wires pass through the corresponding SMA wire adjusting valves; and a laminated piezoelectric driver is also arranged between the upper cover plate and the lower connecting fixed plate. The piezoelectric-SMA composite variable friction intelligent damper has simple structure, convenient assembly and disassembly as well as good repair capacity after vibration; the intelligent damper has self-resetting capability, higher passive damping under the condition of power failure, low initial rigidity and good vibration isolation effect; and the SMA wires can provide vertical uplift bearing capacity and supply vertical damping when in vertical vibration.

Description

Piezoelectric-SMA composite variable friction intelligent damper
Technical field
The present invention relates to civil engineering structure vibration damping control field, be specially a kind of Structural Engineering fields such as building damping antidetonation and wind-induced vibration control that are applicable to, be specially adapted to the shock insulation engineering, the structure of engineering structures under earthquake or wind-induced vibration effect reflected inhibiting, and can realize the frcition damper of half ACTIVE CONTROL.
Background technology
The effect of earthquake, high wind has constituted serious threat for the safety and the comfortableness of civil engineering structure, how to alleviate the response of engineering structures under dynamic load(loading)s such as earthquake and high wind effectively, the antidetonation wind loading rating that improves structure is one of problem demanding prompt solution in the civil engineering subject.
The 1950's, Japanese Kobori has proposed structure and has become rigidity damping notion; 1972, U.S. Yao proposed the notion of vibration control of civil engineering structure in conjunction with modern control theory, had started the new mileage of the ACTIVE CONTROL research of structural vibration.Run into very big difficulty owing to directly energy is converted into the application of ACTIVE CONTROL in civil engineering of control---need very big energy change control into, so people to have to turn to be half ACTIVE CONTROL.In semi-automatic control device, MR damper has developed into the control equipment of main flow, and has changed nearly 30 or 40 years structural vibration control theory and method research is many, application is few situation.But this device is difficult to adapt to the antidetonation and the wind resistance requirement of the huge and complicated structural system of civil engineering, is the task of top priority in 21st century vibration control of civil engineering structure field so promote the development and the practical engineering application of other half active damper.
The structures isolation effect technology is a kind of development earthquake protection technology faster, the notion of shock insulation as far back as 20 beginnings of the century just the someone propose, but just begin on engineering to attempt using up to the twenties in 20th century.In recent years, modern seismic isolation technology has obtained fairly large application in field of civil engineering.In the U.S., Building first adopts 4 layers of structure of base isolation technology to begin to build at the beginning of 1984, and finishes mid-term in 1985.In Japan, adopt oneself warp of structure of base isolation technology to surpass Building 1000 at present, and also have a series of base isolation design schemes to come out of the stove every year recently.The structures isolation effect technology obtains the approval of earthquake engineering circle with its good damping effect, safety, durability, economy, applicability.At present, seismic isolation technology is comparatively ripe, becomes very important a kind of structure control technology and adopts the building and the bridge of seismic isolation technology construction to stand the repeatedly test of actual earthquake, for we provide a large amount of successful experience.
Mixing the control shock isolation system then is the comprehensive advantage of performance Passive Control and ACTIVE CONTROL half ACTIVE CONTROL, semi-automatic control device such as laminated rubber bases and electricity, MR damper or title intelligent damper or active control device are mixed use, both made the earthquake acceleration reaction and the stratified deformation of shock isolation system superstructure very little, make the shock insulation layer big displacement can not take place again, and because the energy that the active actuator of this shock isolation system needs is little, compliance is strong, control effectively, be considered to have the shock isolation system of new generation of development potentiality.But existing intelligent shock-isolation system mainly contains following defective:
(1) half ACTIVE CONTROL systematic research problem.Although the existing at present minority case history of half ACTIVE CONTROL system is up to now still based on theoretical and experimental study.With the controlled device of mechanical engineering and aviation field, characteristics such as building structure ubiquity volume is big, quality is big and the control demand is big are if the actual control system undercapacity just can not satisfy the needs of civil engineering antidetonation.If control system is exerted oneself and satisfied the demand, the problem that aforementioned change damping control apparatus and MR damper exist just might be overcome to a certain extent.Yet exerting oneself of present most semi-automatic control devices can not be satisfied the demand of actual building construction vibration control far away.
Magnetic rheological liquid damper is a kind of outstanding intelligence controlling device that developed recently gets up.Because that it has is simple in structure, it is big to exert oneself, regulate easily and the control good effectiveness, so it is the main device that really can be effectively applied to civil engineering structure vibration Based Intelligent Control at present.But, in the world to its research from time of existing more than ten years till now early 1990s, its theoretical result from research move towards to use seldom, few several examples are also only arranged in the whole world.Why is this? the underlying cause has three: 1) stability of magnetic flow liquid and response time index do not reach the requirement that engineering is used, and this makes the performance of magnetic rheological liquid damper can not satisfy the needs of civil engineering structure practical application fully; 2) on half active control strategies of magnetic rheological liquid damper, there is defective to structural vibration, so that the effect that is considered to half ACTIVE CONTROL of magnetic rheological liquid damper is not so good as the passive effect of opening control (passive-on), loses the meaning of magnetic rheological liquid damper to the structural vibration Based Intelligent Control; 3) on engineering is used, researcher's magnetic rheological liquid damper commonly used goes to solve the structural vibration control problem that conventional passive damping device also can solve, and can not embody the advantage of magnetic rheological liquid damper Based Intelligent Control.Owing to above three reasons, make magnetic rheological liquid damper and the intelligence control method of civil engineering structure vibration lost it and the technical advantage of conventional passive control methods comparison, therefore, civil engineering field good it, the application in engineering practice is just seldom.
Frcition damper has simple structure, easy for installation, many advantages such as energy dissipation capacity is good, therefore becomes a kind of passive energy dissipation device commonly used in the engineering.But this type of device frictional force is changeless, in engineering is used many restrictions is arranged.Piezoelectric ceramic actuator has electricity to cause distortion, the response time is fast, driving force is big characteristics are used to regulate the contact pressure (normal pressure) between friction plate, can significantly improve the passive energy dissipation ability of frcition damper, so Chinese scholars is developed on this basis to know clearly and is used for the various piezoelectric friction dampers of half ACTIVE CONTROL.But the piezoelectricity friction-changing damper is littler than the damping-force adjustable that MR damper provides, and does not have the engineering practical application at present substantially.
Marmem (ShapeMemoryAlloy, be called for short SMA) be a kind of brand-new functional material, characteristic with shape memory, phase transformation super-elasticity and high damping, having the rigidity of the hyperelastic SMA material of phase transformation and damping all can be along with distortion of materials or variation of temperature, i.e. the carrying out of phase transformation and changing.The device and the system that are made by marmem have been widely used in fields such as Aero-Space, instrument and meter, control automatically, the energy, robot and medical science.The research of marmem in the vibration control of civil engineering structure field starts from the nineties in last century.The SMA device that field of civil engineering is developed mainly contains two classes: a class is a sma actuator, and another kind of is SMA passive damping device.The former utilizes the shape memory effect of SMA, the super elastic characteristics of The latter SMA.Utilize the energy consumer of super elastic shape memory alloy effect design to compare with other metal energy consumer, have durability and corrosion resistance and good, life cycle is long, allows series of advantages such as large deformation and distortion can recover.
In sum, Chinese scholars has been studied passive energy dissipation device dissimilar and structure, conclude to get up to mainly contain: 1, viscous damping device, 2, viscoelastic damper, 3, the friction energy-dissipating damper, 4, mild steel damper, 5, lead damper, 6, marmem damper, 7, magnetic or electro-rheological fluid damper, 8, piezoelectricity friction-changing damper etc.But above-mentioned damper all adopts single energy consume mechanism or single dissipative cell and material power consumption, and damping force that is provided (yield force) and initial stiffness are limited.
For satisfying actual requirement of engineering, energy consumer (damper) must sufficiently largely just can meet the demands, general building structure with the damping force of energy consumer to be advisable more than the 500kN, damping force is too little, the quantity of required damper is just many, arrange to get up can bother very much, sequence of construction and cycle increase, and also influence the building usage space.The damper of special double ACTIVE CONTROL, quantity also can cause the control system complexity too much, reduce the reliability of The whole control system.And existing damper major part is unidirectional, and horizontal direction needs along x, y bidirectional arrangements damper, is to realize vertical earthquake isolating, also needs at the vertical damper of arranging, these all cause the complicated and difficult of shock insulation layer damper arrangement.
(2) the vertical earthquake isolating problem of isolation structure.The researcher advocates to utilize the vertical rigidity of rubber vibration isolation cushion and the vertical earthquake response that damping reduces isolation structure.Wherein, people such as Asano has studied the function of shock insulation of rubber pad shock insulation layer and rocking vibration to structure vertical under the Kobe earthquake.People such as Lew and Hudson points out that the vertical earthquake of big earthquake intensity can't work the mischief to isolation structure after the vertical earthquake response record of the actual measurement of having analyzed some practical structures.Should see, though it is not their research is valuable, comprehensive.At first, rubber vibration isolation cushion mainly is that the requirement according to horizontal shock insulation designs, and its vertical rigidity and damping are not optimum to vertical earthquake isolating; Secondly, though the vertical earthquake response of isolation structure can not work the mischief to the shock insulation layer, it might make the superstructure post produce bigger axially brisance, thereby causes the total ratio of axial compressive force to axial compressive ultimate capacity of section of structural column to surpass permissible value.
Summary of the invention
Low in order to overcome existing piezoelectricity friction-changing damper energy dissipation capacity, excessive precompression causes damper to start difficulty, and confficient of static friction is bigger than the coefficient of kinetic friction, and unstable; Frcition damper has the deficiency of remaining displacement, the present invention aims to provide a kind of piezoelectric-SMA composite variable friction intelligent damper that can realize half ACTIVE CONTROL that is composited by marmem and stacked piezoelectric ceramic stack, it utilizes the runback potential energy power of SMA to solve the problem of the remaining displacement of frcition damper, and because the existence of SMA silk produces damping to vertical vibrations, the vertically pulling-resistant bearing capacity is provided also can for the damper that is placed on the shock insulation layer, be a kind of simple structure, be suitable for the half active energy-consumption damper that engineering is used.
To achieve these goals, the technical solution adopted in the present invention is: described piezoelectric-SMA composite variable friction intelligent damper, comprise upper cover plate and under be connected and fixed plate, its design feature is, upper cover plate and under be connected and fixed and be provided with between the plate and the rigidly connected driver horizontal location of shock insulation layer superstructure plate, on this driver horizontal location plate, vertically be furnished with a plurality of SMA silk control valves, upper cover plate and under be connected and fixed and be provided with many SMA silks between the plate, the two ends of every SMA silk be separately fixed at this upper cover plate and under be connected and fixed on the plate, and every SMA silk correspondence is passed a SMA silk control valve that is used for fixing the SMA silk and the SMA silk is applied pretension; Described upper cover plate and under be connected and fixed also to be provided with between the plate and vertically be contained in this driver horizontal location plate center stacked piezoelectric driver, this stacked piezoelectric driver can or reverse and can vertically be free to slide with respect to described driver horizontal location plate with described driver horizontal location plate translation.。
Further; in order to protect SMA silk and stacked piezoelectric driver; be provided with the annular laminated rubber bearing that is fixed on the driver horizontal location plate in the SMA silk outside; these annular laminated rubber bearing two ends respectively with upper cover plate with under be connected and fixed plate and fixedly connected, and SMA silk and stacked piezoelectric driver are looped around annular laminated rubber bearing inboard.
Further, the lower end of described upper cover plate and the following upper end that is connected and fixed plate are provided with friction plate, and during horizontal vibrating, the relative friction plate of stacked piezoelectric driver slides.
Described stacked piezoelectric drive arrangement is translation type or twist mode in the mode of driver horizontal location plate, and the concrete quantity of stacked piezoelectric driver is determined according to the structural dynamic result calculated.
The prestrain that described SMA silk control valve applies for the SMA silk is about 3%.
Above-mentioned damper by being bolted on the pre-embedded steel slab, can be embedded in the shock insulation layer then.
By said structure, when earthquake takes place, driver horizontal location plate with respect to upper cover plate and under be connected and fixed plate and move, by adjusting the voltage of stacked piezoelectric driver, under a electric field action by the decision of Structural Vibration Semi-active Control Technology algorithm, the stacked piezoelectric driver can produce a normal pressure that is directly proportional with electric-field intensity on friction plate under complete constraints, because friction factor is a definite value, so the frictional force between stacked piezoelectric driver and friction plate can change with normal pressure, i.e. variation with voltage changes, after embedding half ACTIVE CONTROL algorithm by single-chip microcomputer, can realize Based Intelligent Control to friction damping force.Simultaneously, stretcher strain takes place in the SMA silk after prestretched, utilizes its super-elasticity power consumption, when special violent earthquake takes place, gives the energising of SMA silk, can increase the damping force and the runback potential energy power of damper of the present invention greatly, with the generation of reply aftershock.
After earthquake finishes, because the super-elasticity restoring force of SMA silk can make the driver horizontal location plate of damper of the present invention automatically restore to the vertical motion equilbrium position.
When vertical earthquake took place, SMA silk generation stretcher strain utilized its super-elasticity power consumption, can also provide anti-pulling capacity simultaneously.When wherein the SMA silk upwards vibrated, the SMA silk that is positioned at driver horizontal location plate downside stretched, and utilized the super-elasticity power consumption of SMA silk, and vertical damping is provided, and driver horizontal location plate is driven by the firm arm of shock insulation layer superstructure, upwards vibration; When the SMA silk vibrates downwards, the SMA silk that is positioned at driver horizontal location plate upside stretches, utilize the super-elasticity power consumption of SMA silk, vertical damping is provided, driver horizontal location plate can only retrain the horizontal direction of piezoelectric actuator, and moves simultaneously with it, but vertically then easy on and off slip, driver horizontal location plate is driven by the firm arm of shock insulation layer superstructure, downwards vibration.
When outage, stacked piezoelectric driver cisco unity malfunction causes SMA silk tensile elongation can become greatly, and the corresponding enhancing of its super-elasticity energy dissipation capacity meeting can continue to guarantee the safety of structure under earthquake conditions.
The present invention for the first time system proposes and the device that passes through to be invented has been realized with two kinds of intellectual materials---and marmem and stacked piezoelectric heap are developed the thought of compound friction intelligent damper.SMA has unique shape memory and superelastic effect, and the stacked piezoelectric ceramic driver can change the normal pressure of frcition damper in moment (microsecond level) under electric field action.Deficiency at the piezoelectric friction damper of the design of Chinese scholars in the past, especially the adjustable damping force that provides of piezoelectric friction damper is less than normal, when precompression is too big, the frcition damper starting difficulty, the present invention proposes the composite buffer thought of half ACTIVE CONTROL, utilize the advantage of stacked piezoelectric heap and marmem, developed damper compound, that can realize half ACTIVE CONTROL.The stacked piezoelectric heap can sinter different shapes into according to the design needs, only two of needs provide the lead of voltage just can form a variable electric field and realize half ACTIVE CONTROL, and MR damper needs an electromagnetic coil to form variable magnetic field could to realize, therefore MR damper and the combination of other intellectual material, the difficulty that forms composite buffer is piled much bigger than stacked piezoelectric.Therefore utilizing stacked piezoelectric heap and SMA to design the composite intelligent damper is the easiest realization, and its structure is simple more, volume is small and exquisite, it is more flexible to design.
Novel intelligent damper by SMA silk and piezoelectric friction damper collaborative work, during little shake, by the super-elasticity power consumption of austenite SMA silk, stacked piezoelectric is piled in addition negative voltage, frcition damper is exerted oneself also littler than (when not having control) under the passive state, and it is sliding to have guaranteed that the shock insulation layer has been easy to; During big the shake, martensite SMA silk heats up, and utilizes shape memory characteristic that restoring force is provided, and the stacked piezoelectric heap applies positive voltage, and controlled friction heavy damping power is provided.Under with a kind of energy consume mechanism, utilize multiple dissipative cell collaborative work, common power consumption; This damper also has multiple tracks energy-dissipating and shock-absorbing defence line, the multi-way prevention principle that meets Anti-quake Architectural Structure Design, positive safe load (Fale-Safe) ability of half ACTIVE CONTROL damper is improved, under the situation of outage, still can passive passive energy dissipation (the Passive Control state is down that friction and SMA silk utilize the super-elasticity power consumption).
Because shock insulation is generally circle with laminated rubber bases, it can guarantee the isolating affection of all directions planar, piezoelectric friction damper disclosed by the invention can relatively can both drive the motion of damper and dissipation energy with the horizontal vibration of any direction on basis in superstructure, so upper cover plate of the present invention and being connected and fixed plate is the circle that assurance can provide universal damping in the horizontal direction down.
Essence of the present invention is the SMA-piezoelectricity friction composite buffer of a kind of vertical passive vibration-insulation damping device and horizontal direction half ACTIVE CONTROL, proposed on the basis of the Intelligent Composite shock isolation system that SMA and piezoelectricity friction-changing damper combine, setting up under the prerequisite of Intelligent Composite shock isolation system to building structure " level cut and turn round-vertical " Seismic Response Control equation, proposing the Intelligent Composite shock isolation system respectively to fuzzy half active control strategies of building structure horizontal earthquake reaction with to the passive control methods of building structure vertical earthquake response.
Particularly, utilize the SMA silk, can provide very simply level each to vertical damping power, simultaneously also provide certain vertically pulling-resistant supporting capacity to damper, provide technical foundation (vertical earthquake isolating damping force and vertically pulling-resistant power are provided) in high building structure, using seismic isolation technology.
The invention solves the problem that resets certainly of frcition damper, SMA is a kind of intellectual material of extensive use, and not only energy dissipation capacity is good, and can automatically restore to original state after the unloading, and the present invention utilizes it to solve the problem that resets certainly of frcition damper.
Compared with prior art, the invention has the beneficial effects as follows:
1) magnetorheologically compare with the combination of marmem with existing, stacked piezoelectric driver and SMA silk all are the good solid materials of workability, and both composite constructions are simple, easy installation and removal, so but after shaking repair ability good;
2) has runback potential energy power;
3) have bigger passive damping under the powering-off state, initial stiffness is little simultaneously, can guarantee isolating affection preferably again;
4) can provide the universal intelligent damping regulated in the horizontal direction;
5) the SMA silk can provide the vertically pulling-resistant bearing capacity, during vertical motion, can provide vertical damping; Under the synergy of the universal damping that provides with horizontal direction, can simplify the complexity of shock insulation layer damper arrangement greatly.
6) compare with existing piezoelectricity friction-changing damper, damping force increases, and energy dissipation capacity strengthens, and reliability improves, and can change present piezo-electric damping device does not have the engineering practical application owing to damping force is too little present situation.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is that the present invention is fixed on the schematic diagram on the pre-embedded steel slab;
Fig. 2 is the vertical view of an embodiment of the present invention;
Fig. 3 is the static lateral view of an embodiment of the present invention;
Fig. 4 is Fig. 3 horizontal direction vibration fundamental diagram;
Fig. 5 is that Fig. 3 vibrates fundamental diagram straight up;
Fig. 6 is that Fig. 3 vibrates fundamental diagram straight down;
Fig. 7 is a translation type intelligent damper stacked piezoelectric piece arrangement diagram of the present invention;
Fig. 8 is a twist mode intelligent damper stacked piezoelectric piece arrangement diagram of the present invention;
Fig. 9 is a driver horizontal location plate constructional drawing of the present invention;
Figure 10 is the scheme of installation of the present invention in base isolation;
Figure 11 is the layout schematic diagram of the present invention in the highrise building framework.
In the drawings
The 1-upper cover plate; Be connected and fixed plate under the 2-; 3-driver horizontal location plate;
4-SMA silk control valve; 5-SMA silk set bolt; 6-stacked piezoelectric driver;
7-vertical motion equilbrium position; The 8-friction plate; The 9-bolt;
The 10-SMA silk; 11-compound friction damper; The 12-pre-embedded steel slab;
13-annular laminated rubber bearing.
The specific embodiment
Embodiment 1
A kind of piezoelectric-SMA composite variable friction intelligent damper, as Fig. 2, shown in 3 and 9, comprise circular upper cover plate 1 and utilize the bolt 9 of large-diameter and high-strength and the following plate 2 that is connected and fixed of the circle that upper cover plate 1 is fixed together, the lower end of this upper cover plate 1 and the following upper end that is connected and fixed plate 2 are provided with friction plate 8, it is the lorry brake block of 600mm that this friction plate 8 can be selected diameter for use, establish the driver horizontal location plate 3 of fixedlying connected between the plate 2 at upper cover plate 1 and following being connected and fixed with shock insulation layer superstructure, on this driver horizontal location plate 3, vertically be furnished with 12 SMA silk control valves 4, upper cover plate 1 and under be connected and fixed and be provided with 12 SMA silks 10 between the plate 2, the two ends of every SMA silk 10 respectively by SMA silk set bolt 5 be fixed on this upper cover plate 1 and under be connected and fixed on the plate 2, and every SMA silk 10 correspondence are passed one and are used for fixing SMA silk 10 and SMA silk 10 is applied the SMA silk control valve 4 of pretension, and the prestrain that this SMA silk control valve 4 applies for SMA silk 10 is 3%.
Described SMA silk 10 outsides are provided with the annular laminated rubber bearing 13 that is fixed on the driver horizontal location plate 3, these annular laminated rubber bearing 13 two ends respectively with upper cover plate 1 with under be connected and fixed plate 2 and fixedly connected, and SMA silk 10 and stacked piezoelectric driver 6 are looped around annular laminated rubber bearing 13 inboards.
Described upper cover plate 1 and under be connected and fixed also to be provided with between the plate 2 and vertically be contained in this driver horizontal location plate 3 center stacked piezoelectric drivers 6, this stacked piezoelectric driver 6 can or reverse and can vertically be free to slide with respect to described driver horizontal location plate 3 with 3 translations of described driver horizontal location plate.As shown in Figure 8, the mode that this stacked piezoelectric driver 6 is arranged in driver horizontal location plate 3 is a twist mode, and promptly stacked piezoelectric driver 6 twists with respect to driver horizontal location plate 3 when horizontal earthquake.Described stacked piezoelectric driver 6 is preferably existing stacked piezoelectric ceramic driver.
Described upper cover plate 1, be connected and fixed plate 2 down and driver horizontal location plate 3 is preferably steel plate.
Shown in Fig. 1,10 and 11, above-mentioned compound friction damper 11 by being bolted on the pre-embedded steel slab 12, can be embedded in the shock insulation layer then.
When earthquake takes place, as shown in Figure 4, driver horizontal location plate 6 with respect to upper cover plate 1 and under be connected and fixed plate 2 and move, by adjusting 6 voltages of stacked piezoelectric driver, under electric field action, stacked piezoelectric driver 6 can produce a normal pressure that is directly proportional with electric-field intensity on friction plate 8 under complete constraints, because friction factor is a definite value, so the frictional force that stacked piezoelectric driver 6 and friction plate are 8 can change with normal pressure, i.e. variation with voltage changes, after embedding half ACTIVE CONTROL algorithm by single-chip microcomputer, can realize the Based Intelligent Control to friction damping force, stacked piezoelectric driver 6 can provide adjustable friction damping force of 0-8KN among the present invention.Simultaneously, stretcher strain takes place in SMA silk 10 after prestretched, utilizes its super-elasticity power consumption, when special violent earthquake takes place, gives the SMA silk 10 energisings, can increase the damping force and the runback potential energy power of damper 11 of the present invention greatly, with the generation of reply aftershock.
During horizontal vibrating, stacked piezoelectric driver 6 relative friction plates 8 slide, and the range of friction plate 8 slips is 155mm relatively.
As illustrated in Figures 5 and 6, after earthquake finishes, because the super-elasticity restoring force of SMA silk 10 can make the driver horizontal location plate 3 of damper 11 of the present invention automatically restore to vertical motion equilbrium position 7.
When vertical earthquake took place, driver horizontal location plate 3 was along with shock insulation layer superstructure up-down vibration, thereby made SMA silk 10 that stretcher strains take place, and utilized the power consumption of SMA silk 10 super-elasticity, can also provide anti-pulling capacity simultaneously.
When outage, stacked piezoelectric driver 6 cisco unity malfunctions cause SMA silk 10 tensile elongations can become greatly, and the corresponding enhancing of its super-elasticity energy dissipation capacity meeting can continue to guarantee the safety of structure under earthquake conditions.
Embodiment 2
A kind of piezoelectric-SMA composite variable friction intelligent damper, also be provided with 4 stacked piezoelectric drivers 6 that are fixed on driver horizontal location plate 3 centers between the plate 2 at upper cover plate 1 and following being connected and fixed, as shown in Figure 7, the mode that this stacked piezoelectric driver 6 is arranged in driver horizontal location plate 3 is the translation type, promptly stacked piezoelectric driver 6 when horizontal earthquake with 3 translations of driver horizontal location plate.One of them is arranged in the center of driver horizontal location plate 3, its excess-three be evenly arranged in this stacked piezoelectric driver 6 that is positioned at driver horizontal location plate 3 centers circumferentially.Described stacked piezoelectric driver 6 is preferably existing stacked piezoelectric ceramic driver.
All the other structures are identical with embodiment 1, repeat no more.

Claims (5)

1. piezoelectric-SMA composite variable friction intelligent damper, comprise upper cover plate (1) and under be connected and fixed plate (2), it is characterized in that, upper cover plate (1) and under be connected and fixed and be provided with between the plate (2) and shock insulation layer superstructure rigidly connected driver horizontal location plate (3), on this driver horizontal location plate (3), vertically be furnished with a plurality of SMA silk control valves (4), upper cover plate (1) and under be connected and fixed and be provided with many SMA silks (10) between the plate (2), the two ends of every SMA silk (10) be separately fixed at this upper cover plate (1) and under be connected and fixed on the plate (2), and every SMA silk (10) correspondence is passed a SMA silk control valve (4) that is used for fixing SMA silk (10) and SMA silk (10) is applied pretension; Described upper cover plate (1) and under be connected and fixed also to be provided with between the plate (2) and vertically be contained in this driver horizontal location plate (3) center stacked piezoelectric driver (6), this stacked piezoelectric driver (6) can or reverse and can vertically be free to slide with respect to described driver horizontal location plate (3) with (3) translation of described driver horizontal location plate.
2. damper according to claim 1, it is characterized in that, described SMA silk (10) outside is provided with the annular laminated rubber bearing (13) that is fixed on the driver horizontal location plate (3), these annular laminated rubber bearing (13) two ends respectively with upper cover plate (1) with under be connected and fixed plate (2) and fixedly connected, and SMA silk (10) and stacked piezoelectric driver (6) are looped around annular laminated rubber bearing (13) inboard.
3. damper according to claim 1 is characterized in that, described upper cover plate (1) and down be connected and fixed plate (2) and be the circle that assurance can provide universal damping in the horizontal direction.
4. damper according to claim 1 is characterized in that, the lower end of described upper cover plate (1) and the following upper end that is connected and fixed plate (2) are provided with friction plate (8).
5. damper according to claim 1 is characterized in that, the mode that described stacked piezoelectric driver (6) is arranged in driver horizontal location plate (3) is translation type or twist mode.
CN2010102084376A 2010-06-23 2010-06-23 Piezoelectric-SMA composite variable friction intelligent damper Expired - Fee Related CN101851963B (en)

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CN105201099A (en) * 2015-10-26 2015-12-30 西安建筑科技大学 SMA piezoelectric friction intelligent mixed damper
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CN105696721A (en) * 2016-01-26 2016-06-22 广州大学 Intelligent fluid viscous damper based on laminated piezoelectric actuator
CN105804266A (en) * 2016-05-27 2016-07-27 西安建筑科技大学 Rod-shaft type piezoelectric-SMA incorporated friction damper
CN105971357A (en) * 2016-06-02 2016-09-28 燕山大学 Piston type SMA-piezoelectric composite variable friction damper
CN109267666A (en) * 2018-11-07 2019-01-25 西安建筑科技大学 A kind of multidirectional lamination variation rigidity marmem damper and its installation method
CN111350290A (en) * 2018-12-24 2020-06-30 哈尔滨工业大学 High-energy-consumption tension-compression and rotation restorable damper

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