CN108193795A - For the active servo grid damping unit of building structure vibration damping control - Google Patents

For the active servo grid damping unit of building structure vibration damping control Download PDF

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Publication number
CN108193795A
CN108193795A CN201810002638.7A CN201810002638A CN108193795A CN 108193795 A CN108193795 A CN 108193795A CN 201810002638 A CN201810002638 A CN 201810002638A CN 108193795 A CN108193795 A CN 108193795A
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CN
China
Prior art keywords
grid
active
grille blades
control
building
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810002638.7A
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Chinese (zh)
Inventor
左太辉
李庆祥
杨仕超
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Guangdong Provincial Academy of Building Research Group Co Ltd
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Guangdong Provincial Academy of Building Research Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Guangdong Provincial Academy of Building Research Group Co Ltd filed Critical Guangdong Provincial Academy of Building Research Group Co Ltd
Priority to CN201810002638.7A priority Critical patent/CN108193795A/en
Publication of CN108193795A publication Critical patent/CN108193795A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0215Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0235Anti-seismic devices with hydraulic or pneumatic damping

Abstract

The invention discloses the active servo grid damping units controlled for building structure vibration damping,Including water tank,Acceleration transducer and control system,Water tank includes babinet,The identical grid damping unit of N group structures is provided in babinet,Babinet is divided into N+1 separate space by N group grid damping units,Adjacent separate space connects,The grid damping unit includes outer framework,Grille blades axis and active grille blades,The outer framework is longitudinally mounted in babinet,The grille blades axis is more be mounted vertically on outer framework,The more equidistant word orders of grille blades axis,Active grille blades are fixedly mounted on grille blades axis,The babinet is also set up there are two water tank inlet/outlet valve,Two water tank inlet/outlet valves are distributed in diagonal,The control system is connected respectively with the water tank inlet/outlet valve and grille blades axis.The device can adjust the damping of water tank, have the function of good passive energy dissipation.

Description

For the active servo grid damping unit of building structure vibration damping control
Technical field
Active servo grid the present invention relates to vibration control technology field, in particular to for the control of building structure vibration damping Damping unit.
Background technology
In recent years, as urbanization process accelerates, more and more populations are concentrated to city, and building industry market presents quick-fried Hairdo increases, and causes urban land more and more nervous, with the promotion and application of new material, new technology, new construction technology, building Develop to light, high, soft direction, high-rise building development in city also becomes a kind of inexorable trend.Increase with structure height, span increases Greatly, flexible reinforced causes structure to generate resonance response under high wind effect, gently then influences people and normally produces, lives to vibrate and relax Appropriateness requirement, it is heavy then cause structure major injury with destruction.These high-rise buildings how are improved to vibrate under typhoon and earthquake Stability problem has obtained various circles of society's highest attention.With the application of new material, new construction and new process, architecture quality is more next Lighter, rigidity is less and less, damping it is lower and lower, structure is softr, can be generated under wind action larger vibration and Deformation, for ensure structure safety and traffic it is smooth, how to take effective vibration reducing measure for specific building is knot A major challenge of structure engineering development.
The vibration damping that conventional method carries out structure is very uneconomical reasonable, and can not adapt to architectural development that is energy saving, subtracting material Thinking.In recent years, dissipative damping device has been successfully applied in the tall and slender structure to wind susceptible, such as skyscraper, height Alarm tower, Loads of Long-span Bridges etc..The purpose is to the reaction under wind is controlled to act on, the vibration that can increase substantially building structure is comfortable Degree.The structural vibration reduction control method of current civil engineering mainstream is that tuned mass damper, TMD (be abbreviated as by tuned mass damper, TMD ) and Tuned Liquid (being abbreviated as TLD of Tuned Liquid) TMD.
Wherein Tuned Liquid is to have filled the fixed-size rigid cistern system of certain altitude liquid.By by its It is fixed on controlled structural vibration position the most significant and carrys out vibration damping.The athletic meeting of external load excitation lower structure drives water tank movement, So as to induce liquid sloshing in water tank, the liquid of shaking can generate a reaction force to structure, when this power and structural vibration When displacement meets certain phase relation, will dissipative structure vibrational energy, so as to achieve the purpose that inhibit structural vibration.It is logical Optimum efficiency to structure control will be reached by crossing some parameters of design TLD.
For common TLD, in order to reach preferable effectiveness in vibration suppression, need to set more water tank in different location, account for More with space, cost is higher, and effectiveness in vibration suppression is also relatively limited.And the effect is relatively poor for vibration control, tuning also can be because For it is strong it is non-linear become extremely difficult, and will appear breaker under soaking, in resonance high order mode participation shake Dynamic large percentage, if applied in also needing to further careful design in Practical Project.
Invention content
The purpose of the present invention is to provide the active servo grid damping unit controlled for building structure vibration damping, the devices The damping of water tank can be adjusted, there is good passive energy dissipation.
The above-mentioned purpose of the present invention is achieved through the following technical solutions:For the active servo of building structure vibration damping control Grid damping unit, including water tank, the water tank is the existing water storage box of building structure, and water tank is arranged on the top of building structure Or mechanical floor, the water tank include babinet, water are stored in babinet, it is characterised in that:Described device further includes acceleration biography Sensor and control system, the acceleration transducer are arranged on the roof or 2/3 height and position of building structure, for collecting By the acceleration magnitude of building construction vibration under extraneous wind load or seismic loading, N groups are provided in the babinet The identical grid damping unit of structure, N are the natural number more than or equal to 1, and babinet is divided into N+1 by N group grid damping units Separate space, adjacent separate space connect, and the grid damping unit includes outer framework, grille blades axis and active grille blades, The outer framework is longitudinally mounted in babinet, and the grille blades axis is more be mounted vertically on outer framework, more The equidistant word order of grille blades axis, active grille blades are fixedly mounted on grille blades axis, the number of active grille blades Amount is equal with the quantity of grid sharf, and the two is in one-to-one relationship, and the babinet is also set up there are two water tank inlet/outlet valve, Two water tank inlet/outlet valves in diagonal be distributed, the control system respectively with the water tank inlet/outlet valve and grille blades Axis is connected, and the control system can receive the acceleration signal of acceleration transducer transmission, judges whether more than restriction Acceleration value, when acceleration is more than limit value, startup water tank inlet/outlet valve controls the water level in babinet, controls simultaneously System also is able to driving active grille blades rotation, by adjusting the rotating speed and rotation angle of active grille blades, to adjust water The damping of case obtains meeting the structural vibration period and meets the cistern water level distribution of structural eigenvector.
The present invention in building key position installation acceleration transducer, and passes through according to skyscraper vibration control needs Acceleration of the control system monitoring building under wind/seismic loading, is identified its vibration shape and frequency characteristic, for knot Structure acceleration is more than accordingly limits value, and rapid control device separates interior plus active grid to water tank and controls.
In the present invention, N+1 described separate space etc. point is set, and structure is identical.
In the present invention, the babinet is rectangle, and the separate space is also rectangle.
In the present invention, the active grille blades are fixedly mounted on grille blades axis or are welded on by rivet On grille blades axis.
In the present invention, the N is 2.
In the present invention, the building structure is skyscraper, and the height of the skyscraper is civilian more than the work of 200m Building.
In the present invention, the control system includes computer, digit driver and servo motor, the digital drive Device is mounted in servo motor, and computer is connected with digit driver, and the instruction of computer is transferred to by digit driver Servo motor, the servo motor are connected with the grille blades axis, and servo motor drives master by grille blades axis Dynamic grille blades rotation, the rotating speed of active grille blades and rotation angle are adjusted by changing the operating status of servo motor, Achieve the purpose that control the movement of active grille blades.
The active servo grid damping unit of the present invention increases water tank damper by grid and damps, and grid is carried out and is led Dynamic control by adjusting grid parameter, realizes the variation of TLD natural vibration periods in a certain range, and reach and meet external loads The Optimal damping ratio of excitation.
The active servo grid damping unit of the present invention, can be by changing grid number, grid installation position, grid resistance Fill in ratio, grille strip rotation angle, grid servo harmonic excitation frequency, form grid baffle dimensions etc. distinguish Parametric designing and Vibration analysis analyzes the damping property of TLD by analyzing side wall wave height and structural vibration reduction effect.Traditional TLD is compared to, this Side wall wave height significantly reduces the active servo grid damping unit of invention in all cases, and breaker phenomenon disappears completely It removes, high order mode, which participates in the ratio of vibration, during resonance reduces very much, and nonlinear characteristic is significantly improved, and passes through change Grid parameter can be very good to meet effectiveness in vibration suppression.
The active servo grid damping unit of the present invention can be according to the power side of the equivalent linear TMD models of grid TLD The optimal parameter of its vibration control of journey optimization:Optimal frequency ratio, Optimal damping ratio obtain the geometric dimension parameter of TLD, according to excellent Change result to understand:The Optimal damping ratio of TLD is changed with the variation of excitation amplitude;The not every quality of TLD is involved in shaking It is dynamic, that is, there are problems that an oscillating mass participation is compared;TLD and the control effect of the TMD of identical mass ratio are essentially identical, only So that its control effect is more slightly worse than TMD since the damping ratio of TLD reduces other than resonance point.
Compared with prior art, the present invention has following remarkable advantage:
(1) active servo grid damping unit of the invention is in building key position arrangement acceleration transducer, sensor It is connect with computer, is identified in wind or the seismic loading lower structure vibration shape and period, sentenced by computer program control system The disconnected frequency range for needing to control and direction of vibration.
(2) active servo grid damping unit of the invention will set active grid in large water tank, can significantly improve water The damping of case becomes apparent from than an independent water tank effectiveness in vibration suppression
(3) active servo grid damping unit of the invention is driven using servo motor, driver control system adjustment lattice Grid rotating speed and rotation angle can adjust damper vibration frequency and maximum damping ratio, be optimal control state of a control.
(4) active servo grid damping unit of the invention is by measuring pure water and setting the side wall wave height after grid can be with Find out that pure water TLD, with very strong nonlinear characteristic, and sets after grid its non-linear to be significantly improved when shaking.Cause This pure water TLD has significant nonlinear characteristic, and grid TLD approximate can use linear TMD mechanical models.
Description of the drawings
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
Fig. 1 is the structure diagram that active servo grid damping unit of the present invention is mounted in building structure;
Fig. 2 is the overall structure diagram of water tank in active servo grid damping unit of the present invention;
Fig. 3 is the operation principle frame diagram of active servo grid damping unit of the present invention.
Reference sign
1 is acceleration transducer, and 21 be grille blades axis, and 22 be active grille blades, and 23 be outer framework,
24 be babinet, and 25 be water tank inlet/outlet valve, and 26 be separate space, 3 systems in order to control.
Specific embodiment
The active servo grid damping unit for the control of building structure vibration damping as shown in Figure 1 to Figure 3, including acceleration Sensor 1, water tank 2 and control system 3, acceleration transducer 1 be arranged on building structure roof or building structure it is 2/3 high Position is spent, 2/3 height and position of building structure is key position, and acceleration transducer 1 is for collection by extraneous wind load Or under seismic loading building construction vibration acceleration magnitude, water tank 2 be the existing water storage box of building structure, water tank 2 It is arranged on top or the mechanical floor of building structure.
Water tank 2 includes babinet 24, and water is stored in babinet 24, and babinet 24 is rectangle, and 2 groups of structure phases are provided in babinet 24 Babinet 24 is divided into 3 separate spaces, 26,3 separate space 26 grades point settings, knot by same grid damping unit, 2 groups of grid damping units Structure is identical, and separate space 26 is rectangle, and adjacent separate space 26 connects, and grid damping unit includes outer framework 23, grille blades axis 21 With active grille blades 22, outer framework 23 is longitudinally mounted in babinet 24, and grille blades axis 21 is is mounted vertically in outer framework 23 On more, more 1 equidistant word orders of grille blades axis, active grille blades 22 are fixedly mounted on grille blades axis 21 On, the quantity of active grille blades 22 is equal with the quantity of grid sharf 21, and the two is in one-to-one relationship, and babinet 24 is also set It puts there are two water tank inlet/outlet valve 25, two water tank inlet/outlet valves 25 are distributed in diagonal.
Control system 3 is connected respectively with water tank inlet/outlet valve 25 and grille blades axis 21, and control system 3, which can receive, to be added The acceleration signal that velocity sensor 1 transmits judges whether, more than the acceleration value limited, to open when acceleration is more than limit value Dynamic water tank inlet/outlet valve 25 controls the water level in babinet 24, while control system 3 also is able to driving active grille blades 22 rotations, by adjusting the rotating speed and rotation angle of active grille blades 22, to adjust the damping of water tank, obtain meeting knot Structure vibration period and the cistern water level distribution for meeting structural eigenvector.
In the present embodiment, active grille blades 22 are fixedly mounted on by rivet on grille blades axis 21, can also be direct It is connected on grille blades axis 21.
In the present embodiment, building structure is skyscraper, and the height of the skyscraper is more than the work civil buildings of 200m.
In the present embodiment, control system 3 includes computer, digit driver and servo motor, and digit driver is mounted on In servo motor, computer is connected with digit driver, and the instruction of computer is transferred to servo motor by digit driver, Servo motor is connected with grid sharf 21, and servo motor drives 22 turns of active grille blades by grille blades axis 21 It is dynamic, the rotating speed of active grille blades 22 and rotation angle are adjusted by changing the operating status of servo motor, reaches control master The purpose that dynamic grille blades 22 move.
As the transformation of the present embodiment, be provided with the identical grid damping unit of N group structures in babinet 24, N be more than etc. In 1 natural number, for example N is 1,2,3 ... 8,9 etc., and babinet 24 is evenly divided into N+1 separate space by N group grid damping units 26, adjacent separate space 26 connects.
The active servo grid damping unit of the present invention can be made in structure by extraneous wind load or earthquake load With, the acceleration magnitude of acceleration transducer collection structure vibration, and pass through computer and judge whether more than specification limit Acceleration value.If a direction acceleration is limited more than acceleration, computer expert crosses analysis and Control program, obtains the master control of structure The vibration shape and period.Start servo motor, control the rotation angle of active grid, obtain meeting the structural vibration period and meet structure The grid rotation angle and speed of the vibration shape can expand the frequency range of TLD damper vibration dampings and to obtain damper optimal Damping ratio.
The active servo grid damping unit of the present invention mainly includes mechanical part and control system.Mechanical part mainly wraps It includes:Outer framework, grille blades axis and active grille blades.Outer framework and grille blades axis play a supportive role, active grille blades Certain rotating speed and rotation angle is controlled to rotate by control system, so as to increase the vibration damping frequency of water tank damping and adjustment water tank Rate is consistent with the frequency cycle that structure needs control.
Control system is made of computer, digit driver and servo motor, changes the fortune of servo motor by driver Row state achievees the purpose that control grid movements.Motion control parameter is exchanged by computer software window with digit driver to be referred to It enables and realizing, can realize that the formal character of grid movements, vibration frequency are set by kinematic parameter controller chassis;Run control section Commander's motor driven systems progress system zero-bit is looked for, the control of motor constant-speed operation and running position;Curve movement display window The displacement curve of real-time display grid movements.As it can be seen that the numerical control of active trellis system can be realized by kinetic control system Energy.
By change simple harmonic quantity displacement excitation amplitude, water height, partition board number, partition position, form partition board grid size, every A variable in plate blockage ratio has carried out the measurement of side wall wave height respectively, and optimal grid setting side has been obtained by comparison Case.By measuring pure water and the side wall wave height after grid being set to can be seen that pure water TLD when shaking with very strong non-linear Characteristic, and its is set after grid non-linear to be significantly improved.Therefore pure water TLD has significant nonlinear characteristic, and lattice Grid TLD approximate can use linear TMD mechanical models.
As shown in figure 3, when skyscraper is by the effect of extraneous wind load or earthquake load, in skyscraper roof Or key position setting acceleration transducer, it is corresponding that monitoring collects structural key floor levels acceleration, control system Judge whether acceleration value is more than specification limit.If a direction acceleration is limited more than acceleration, computer expert crosses analysis Program is controlled, obtains the master control vibration shape and the period of structure, starts servo motor and active grid is controlled, obtain meeting structure Vibration control frequency and the control of optimal damper device.
From optimal frequency ratio, Optimal damping ratio and mass ratio and the relationship of water tank length, it can be deduced that the optimal frequency ratio of TLD will It is bigger than the optimal frequency ratio of the TMD of identical mass ratio this is because there is part water to be not engaged in vibration in TLD, it is and optimal Damping ratio is also to change with the variation of main structure dynamic respond, i.e., related with excitation amplitude.
The above embodiment of the present invention is not limiting the scope of the present invention, and embodiments of the present invention are not limited to This, all this kind the above according to the present invention according to the ordinary technical knowledge and customary means of this field, is not departing from this Under the premise of inventing above-mentioned basic fundamental thought, the modification of other diversified forms, replacement or the change made to above structure of the present invention More, it should all fall within the scope and spirit of the invention.

Claims (7)

1. for the active servo grid damping unit of building structure vibration damping control, including water tank (2), the water tank (2) is builds The existing water storage box of building structure, water tank (2) are arranged on the top of building structure or mechanical floor key floor, the water tank (2) Including babinet (24), water is stored in babinet (24), it is characterised in that:Described device further includes acceleration transducer (1) and control System (3) processed, the acceleration transducer (1) are arranged on the roof or 2/3 height and position of building structure, are meeting with for collecting The acceleration magnitude of building construction vibration under by extraneous wind load or seismic loading, the babinet (24) is interior to be provided with N The identical grid damping unit of group structure, N are the natural number more than or equal to 1, and babinet (24) is divided by N group grid damping units N+1 separate space (26), adjacent separate space (26) connect, and the grid damping unit includes outer framework (23), grille blades Axis (21) and active grille blades (22), the outer framework (23) are longitudinally mounted in babinet (24), the grille blades Axis (21) is more be mounted vertically on outer framework (23), the more equidistant word orders of grille blades axis (1), active grid Blade (22) is fixedly mounted on grille blades axis (21), the quantity of active grille blades (22) and the number of grid sharf (21) Measure equal, the two is in one-to-one relationship, and the babinet (24) is also set up there are two water tank inlet/outlet valve (25), two water tanks into Outlet valve (25) is distributed in diagonal, the control system (3) respectively with the water tank inlet/outlet valve (25) and grid leaf Bobbin (21) is connected, and the control system (3) can receive the acceleration signal of acceleration transducer (1) transmission, and judgement is No is more than the acceleration value limited, starts water tank inlet/outlet valve (25) when acceleration is more than limit value to the water in babinet (24) Position is controlled, while control system (3) also is able to driving active grille blades (22) and rotates, by adjusting active grille blades (22) rotating speed and rotation angle to adjust the damping of water tank, obtain meeting the structural vibration period and meet structural eigenvector Cistern water level distribution.
2. the active servo grid damping unit according to claim 1 for the control of building structure vibration damping, feature exists In:N+1 separate space (26) decile setting, structure are identical.
3. the active servo grid damping unit according to claim 1 for the control of building structure vibration damping, feature exists In:The babinet (24) is rectangle, and the separate space (26) is also rectangle.
4. the active servo grid damping unit according to claim 1 for the control of building structure vibration damping, feature exists In:The active grille blades (22) are fixedly mounted on grille blades axis (21) or are welded on grid leaf by rivet On bobbin (21).
5. the active servo grid damping unit according to claim 1 for the control of building structure vibration damping, feature exists In:The N is 2.
6. the active servo grid damping unit according to claim 1 for the control of building structure vibration damping, feature exists In:The building structure is skyscraper, and the floor height of the skyscraper is work civil buildings of the height more than 200m.
7. the active servo grid damping unit according to any one of claims 1 to 6 for the control of building structure vibration damping, It is characterized in that:The control system (3) includes computer, digit driver and servo motor, the digit driver In servo motor, computer is connected with digit driver, and the instruction of computer is transferred to by digit driver to be watched Take motor, the servo motor is connected with the grille blades axis (21), servo motor by grille blades axis (21) come Active grille blades (22) is driven to rotate, turning for active grille blades (22) is adjusted by changing the operating status of servo motor Speed and rotation angle achieve the purpose that active grille blades (22) is controlled to move.
CN201810002638.7A 2018-01-02 2018-01-02 For the active servo grid damping unit of building structure vibration damping control Pending CN108193795A (en)

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