CN106400996A - Vertical frequency adjustment mass damper for model test and design method of vertical frequency adjustment mass damper - Google Patents
Vertical frequency adjustment mass damper for model test and design method of vertical frequency adjustment mass damper Download PDFInfo
- Publication number
- CN106400996A CN106400996A CN201610806649.1A CN201610806649A CN106400996A CN 106400996 A CN106400996 A CN 106400996A CN 201610806649 A CN201610806649 A CN 201610806649A CN 106400996 A CN106400996 A CN 106400996A
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- China
- Prior art keywords
- mass
- tmd
- spring
- mass damper
- base plate
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Classifications
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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
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
Abstract
The invention relates to a vertical frequency adjustment mass damper for a model test and a design method of the vertical frequency adjustment mass damper. The vertical frequency adjustment mass damper comprises a top plate, a bottom plate and a mass block. The top plate and the bottom plate are connected through connection threaded rods. The vertical frequency adjustment mass damper is provided with straight tracks which are fixedly connected with the top plate and the bottom plate. Springs are arranged between the top plate and the mass block as well as between the bottom plate and the mass block. The mass block is connected with sliding blocks which slide up and down along the straight tracks. The mass block makes simple harmonic motion along the straight tracks under the action of the springs. The vertical frequency adjustment mass damper is concise is design, the mass of an additional device is low, a bolt is arranged on the top plate, and thus mounting and dismounting are convenient; the number of the springs can be increased or decreased according to requirements, mounting and dismounting are easy and fast, positioning is symmetrical and accurate, and the model test requirements are met; and the side faces of the mass block are installed on the straight tracks, the gravity is borne by the compression springs, the friction force is small during vertical reciprocating high-frequency motion, influences on the frequency of the damper can be neglected, and the accuracy of frequency adjustment of the vertical frequency adjustment mass damper is guaranteed.
Description
Technical field
The present invention relates to building structure model damping test field, especially relate to a kind of vertical tune for model test
Frequency mass damper and its method for designing.
Background technology
With the needs of economy and urban construction and development, the span of building and bridge and scale are increasing, large span
Structure is common in physical culture, conference ＆ exhibition and Aerodrome Construction and Loads of Long-span Bridges etc..Using tuned mass damper, TMD (TMD) to big across
Degree structural vibration reduction, is a kind of economic and rational solution.TMD is one of earliest Structure uniformity device of application, is
The vibrational system being made up of spring, antivibrator and mass.When main structure produces vibration under outer incentive action, drive frequency modulation
Mass damper vibrates together, and the inertia force that it produces reacts in structure, and its damping also plays energy dissipating effect, makes main structure
Dynamic respons decay and be controlled.
In recent years, with a large amount of construction of large public building, TMD is designed to large-span space structure shockproof control
Research to more and more people.Due to the complexity of self power characteristic, Theoretical Calculation is difficult to meet and wants large-span space structure
Ask, in order to preferably study the damping effect to longspan structure for the TMD, it is requisite for carrying out structural model damping test.
Large-span space structure has the dynamic traits such as the vibration shape is complicated, frequency is mixed, in order to probe into the mount scheme of optimal damper device,
During model test, the parameter such as the arrangement of antivibrator and control frequency need to change at any time.Further, since large span is empty
Between structural dynamic characteristic and model contracting ratio reason, frequency needed for antivibrator higher (typically in 10-30Hz), and quality less (with
Model contracting ratio is relevant with designing quality).This makes antivibrator very sensitive to rubbing, and a small amount of friction may be moved to this antivibrator
Force characteristic brings very big change so as to TMD shock absorption principle cannot be met.At present, also compare shortage one kind and be effectively used for model
The vertical tuned mass damper, TMD of test.
Content of the invention
The purpose of the present invention is exactly to provide to solve the above problems that a kind of installing/dismounting is easy, changeable frequency be used for
The vertical tuned mass damper, TMD of model test and its method for designing.
The purpose of the present invention is achieved through the following technical solutions：
A kind of vertical tuned mass damper, TMD for model test, including the top board on top, the base plate of bottom and set
The connecting screw rod that mass between top board and base plate, described top board and base plate pass through to set between them connects, described
Vertical tuned mass damper, TMD be provided with vertical rectilinear orbit, described rectilinear orbit is fixedly connected with top board and base plate, top
Between plate and mass, between base plate and mass, it is respectively equipped with spring, mass and the slide block sliding up and down along rectilinear orbit
Connect, this mass does simple harmonic motion along rectilinear orbit under the action of the spring.
Described connecting screw rod is to be provided with externally threaded cylinder stock, and is furnished with corresponding nut, between top board and base plate
It is adjusted away from by connecting screw rod and nut.
It is symmetrical arranged before and after described rectilinear orbit, between this rectilinear orbit and top board and base plate and described mass
It is equipped with connecting plate and slide block between.
Described connecting plate is connected by screw on top board, base plate and mass.
The upper and lower surface of the lower surface of described top board, the upper surface of base plate and mass is equipped with location-plate, and this is fixed
Position plate shape is identical with the section of mass, and location-plate adopts politef to make.
Described location-plate is connected with top board, base plate and mass by screw, and described location-plate is provided with multiple
Location hole of the spring, described spring upper and lower ends adhesion annulus packing ring, spring can be made more stable during reciprocating compression, more
Change and more preferably position during spring.
The location-plate of described base plate, plate upper surface and mass lower surface is respectively equipped with size identical center circle
Hole, by this center hole, described mass lower surface can place test acceleration transducer.
Described mass adopts the big metal material of density to make, preferably cast iron.
Described top board upper end is provided with the bolt being connected with longspan structure test model, and described bolt is furnished with spiral shell
Female.
Mass in described vertical tuned mass damper, TMD and the design of spring, specifically adopt following methods：
A (), according to the bearing capacity of local at expected damping effect and longspan structure model suspension, determines single resistance
Quality m of Buddhist nun's device massTMD, it is then determined that the size of the size of mass and antivibrator；
B () determines frequency f of longspan structure model to be controlledTMD；
C () is according to formula kTMD=mTMD(2·π·fTMD)2/ N determines the stiffness coefficient of each spring, and wherein N is spring root
Number, determines according to practical situation, N is preferably taken as even number, makes layout of spring symmetrical；
D () is according to formula kTMD=Gd4/(8D3N), select to meet the spring of rigidity and dimensional requirement, wherein, G is spring
Shear moduluses, d is the diameter of spring wire, and D is the central diameter of spring, and n is active spring coils number；If no such spring, return to step
Suddenly (3) adjustment number of springs N.
The present invention, according to TMD shockproof control principle, provides and a kind of be easily installed, dismantle and can change TMD frequency at any time
Vertical tuned mass damper, TMD, this antivibrator is closely coupled with main structure by bolt, forms an entirety with main structure, only
Mass vertical relative motion on line slide rail, contributes to finding the main contributions vibration shape and corresponding frequencies in structure, when main knot
Structure is interfered when vibrating, and drives the mass motion in amortisseur.Vertical tuned mass damper, TMD is twisted by the bolt of top board
Enter in the screw that longspan structure model is reserved, then tighten nut, be allowed to fix with longspan structure model.Top board and base plate
Connected by many connecting screw rods, mass is connected with the slide block on slide rail, do vertical reciprocating motion along track, work as main structure
Be interfered vibration when, drive amortisseur in mass motion.By resonance principle, when frequency and the main structure of mass motion
When the frequency of motion is close or identical, mass reaches resonance state, and in this condition, amortisseur always applies one and main structure
Reciprocal power of moving weakening the motion of main structure, thus playing a protective role to main structure；For the angle of energy, main
The energy transfer of structure motion thus decreasing the kinergety of main structure, reaches the effect of damping on amortisseur.
Compared with prior art, the design of the present invention vertical tuned mass damper, TMD is succinct, and mass is only transported in vertical direction
Dynamic, meet the demand of longspan structure model damping test, reach the effect of multidirectional damping by unidirectional control；Partly large-scale
Seismographic station equipment, because performance limits it is impossible to be in holding state for a long time, antivibrator additional mass of the present invention is little, top board sets
There is bolt, make easy installation and removal；The present invention adopts location-plate to design, and spring Fast Installation can be made to dismantle, and positions symmetrically accurate
Really, meet the demand of quick regulation in process of the test；The mass design and installation of this antivibrator on smooth line slideway, gravity
Undertaken by compression spring, during vertically reciprocal high frequency motion, no frictional dissipation substantially, it is left that damping ratio is only 0.2%
The right side, the impact to antivibrator frequency for the frictional force can ignore the accuracy it is ensured that frequency modulation.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the main structure diagram of the present invention；
Fig. 3 is the schematic diagram of spring of the present invention；
Fig. 4 is the schematic diagram of location-plate of the present invention；
Fig. 5 is the schematic diagram of base plate of the present invention；
In figure：1- top board；11- bolt；12- nut；2- mass；3- connecting screw rod；4- rectilinear orbit；41- slide block；
42- connecting plate；5- spring；51- annulus packing ring；6- location-plate；61- screw；62- location hole of the spring；7- base plate；8- center circle
Hole；
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of vertical tuned mass damper, TMD for model test, as Figure 1-5, including the top board 1 on top, bottom
Base plate 7 and be located at mass 2 between top board 1 and base plate 7, top board 1 upper end is provided with and is connected with longspan structure model
Bolt 11, bolt 11 is furnished with two nuts 12, mass 2 is square, makes using solid iron, top board 1 and base plate 7 lead to
Cross four connecting screw rods 3 setting between them to connect, connecting screw rod 3 is to be provided with externally threaded cylinder stock, is furnished with corresponding
Nut, top board 1 is adjusted by connecting screw rod 3 and nut with the spacing of base plate 7.Vertical tuned mass damper, TMD is provided with vertically
Rectilinear orbit 4, rectilinear orbit 4 is fixedly connected with top board 1 and base plate 7, between top board 1 and mass 2, base plate 7 and mass 2
Between be respectively equipped with multiple springs 5, rectilinear orbit 4 is provided with the slide block 41 sliding up and down, and this mass 2 is in the presence of spring 5
Move reciprocatingly along rectilinear orbit 4.Be symmetrical arranged before and after rectilinear orbit 4, between this rectilinear orbit 4 and top board 1 and base plate 7 and
It is equipped with connecting plate 42, connecting plate 42 is connected by screw in top board 1, base plate 7 and mass 2 between mass 2 and slide block 41
On.The upper and lower surface of the lower surface of top board 1, the upper surface of base plate 7 and mass 2 is equipped with location-plate 6, this location-plate 6 shape
Shape is identical with the section of mass, and location-plate 6 adopts politef to make, location-plate 6 pass through screw and top board 1, base plate 7 with
And mass 2 connects, location-plate 6 is provided with six location hole of the spring 62, and spring 5 two ends adhesion has annulus packing ring 51, can make bullet
Spring 5 is stuck in location hole 62, makes spring 5 more stable during reciprocating compression, more preferably positions when changing spring.Base plate 1, bottom
The location-plate 6 of plate 1 upper surface and quality board 2 lower surface is respectively equipped with size identical center hole 8, by this center hole
8, mass 2 can connecting test acceleration transducer to test the dynamic trait of this TMD.
Embodiment 2
Mass in vertical tuned mass damper, TMD and the design of spring, specifically adopt following methods：
A (), according to the bearing capacity of local at expected damping effect and longspan structure model suspension, determines single resistance
Quality m of Buddhist nun's device massTMD, it is then determined that the size of the size of mass and antivibrator；
B () determines frequency f of longspan structure model to be controlledTMD；
C () is according to formula kTMD=mTMD(2·π·fTMD)2/ N determines the stiffness coefficient of each spring, and wherein N is spring root
Number, determines according to practical situation, N is taken as even number, makes layout of spring symmetrical；
D () is according to formula kTMD=Gd4/(8D3N), select to meet the spring of rigidity, size and other requirements, wherein, G is
The shear moduluses of spring, d is the diameter of spring wire, and D is the central diameter of spring, and n is active spring coils number；If no such spring,
Return to step (3) adjustment number of springs N.
Claims (10)
1. a kind of vertical tuned mass damper, TMD for model test, top board (1) including top, the base plate (7) of bottom with
And it is located at the mass (2) between top board (1) and base plate (7) it is characterised in that described top board (1) and base plate (7) pass through to set
Connecting screw rod (3) between them connects, and described vertical tuned mass damper, TMD is provided with vertical rectilinear orbit (4), institute
The rectilinear orbit (4) stated is fixedly connected with top board (1) and base plate (7), between top board (1) and mass (2), base plate (7) and matter
It is respectively equipped with spring (5), mass (2) is connected with the slide block (41) sliding up and down along rectilinear orbit (4) between gauge block (2), should
Mass (2) does simple harmonic motion along rectilinear orbit (4) in the presence of spring (5).
2. a kind of vertical tuned mass damper, TMD for model test according to claim 1 is it is characterised in that described
Connecting screw rod (3) be to be provided with externally threaded cylinder stock, and be furnished with corresponding nut, top board (1) is led to the spacing of base plate (7)
Cross connecting screw rod (3) and nut is adjusted.
3. a kind of vertical tuned mass damper, TMD for model test according to claim 1 is it is characterised in that described
Rectilinear orbit (4) before and after be symmetrical arranged, between this rectilinear orbit (4) and top board (1) and base plate (7) and described mass
(2) it is equipped with connecting plate (42) and slide block (41) between.
4. a kind of vertical tuned mass damper, TMD for model test according to claim 4 is it is characterised in that described
Connecting plate (42) be connected on top board (1), base plate (7) and mass (2) by screw (61).
5. a kind of vertical tuned mass damper, TMD for model test according to claim 1 is it is characterised in that described
The upper and lower surface of the lower surface of top board (1), the upper surface of base plate (7) and mass (2) be equipped with location-plate (6), this is fixed
Position plate (6) shape is identical with the section of mass (2), and location-plate (6) adopts politef to make.
6. a kind of vertical tuned mass damper, TMD for model test according to claim 5 is it is characterised in that described
Location-plate (6) be connected with top board (1), base plate (7) and mass (2) by screw (61), described location-plate (6) sets
There are multiple location hole of the spring (62), described spring (5) upper and lower ends adhesion annulus packing ring (51).
7. a kind of vertical tuned mass damper, TMD for model test according to claim 6 is it is characterised in that described
The location-plate (6) of base plate (7), base plate (7) upper surface and mass (2) lower surface be respectively equipped with size identical center circle
Hole (8), by this center hole (8), described mass (2) lower surface can connecting test acceleration transducer.
8. a kind of vertical tuned mass damper, TMD for model test according to claim 1 is it is characterised in that described
Mass (2) adopt the big metal material of density to make.
9. a kind of vertical tuned mass damper, TMD for model test according to claim 1 is it is characterised in that described
Top board (1) upper end be provided with the bolt (11) being connected with longspan structure test model, described bolt (11) is furnished with spiral shell
Female (12).
10. a kind of method for designing of vertical as claimed in claim 1 tuned mass damper, TMD is it is characterised in that described is perpendicular
To the design of the mass (2) in tuned mass damper, TMD and spring (5), specifically adopt following methods：
A (), according to the bearing capacity of local at expected damping effect and longspan structure model suspension, determines single antivibrator
Quality m of mass (2)TMD, it is then determined that the size of the size of mass (2) and antivibrator；
B () determines frequency f of longspan structure model to be controlledTMD；
C () is according to formula kTMD=mTMD(2·π·fTMD)2/ N determines the stiffness coefficient of each spring (5), and wherein N is spring (5)
Radical, determines according to practical situation, N is preferably taken as even number；
D () is according to formula kTMD=Gd4/(8D3N), select to meet the spring (5) of rigidity and dimensional requirement, wherein, G is spring (5)
Shear moduluses, d be spring (5) silk diameter, D be spring (5) central diameter, n be spring (5) number of active coils；If no such
Spring (5), returns to step (c) adjustment spring (5) quantity N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610806649.1A CN106400996A (en) | 2016-09-07 | 2016-09-07 | Vertical frequency adjustment mass damper for model test and design method of vertical frequency adjustment mass damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610806649.1A CN106400996A (en) | 2016-09-07 | 2016-09-07 | Vertical frequency adjustment mass damper for model test and design method of vertical frequency adjustment mass damper |
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| CN201610806649.1A Pending CN106400996A (en) | 2016-09-07 | 2016-09-07 | Vertical frequency adjustment mass damper for model test and design method of vertical frequency adjustment mass damper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944251A (en) * | 2020-07-18 | 2022-01-18 | 四川熠希尔科技有限公司 | Novel earthquake isolation structure |
| CN113944250A (en) * | 2020-07-18 | 2022-01-18 | 四川熠希尔科技有限公司 | Novel earthquake isolation structure |
| CN113944249A (en) * | 2020-07-18 | 2022-01-18 | 四川熠希尔科技有限公司 | Novel earthquake isolation structure |
| CN113942533A (en) * | 2021-11-17 | 2022-01-18 | 同济大学 | Under-vehicle shock absorber for inhibiting vertical vibration of railway vehicle body |
| CN114562128A (en) * | 2022-03-31 | 2022-05-31 | 中铁城建集团第一工程有限公司 | Steel structure plant maintenance plate reinforcing structure and using method thereof |
| CN115614429A (en) * | 2022-10-09 | 2023-01-17 | 国网安徽省电力有限公司铜陵供电公司 | Balanced shock attenuation damping device |
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| CN113944251A (en) * | 2020-07-18 | 2022-01-18 | 四川熠希尔科技有限公司 | Novel earthquake isolation structure |
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| CN113942533A (en) * | 2021-11-17 | 2022-01-18 | 同济大学 | Under-vehicle shock absorber for inhibiting vertical vibration of railway vehicle body |
| CN114562128A (en) * | 2022-03-31 | 2022-05-31 | 中铁城建集团第一工程有限公司 | Steel structure plant maintenance plate reinforcing structure and using method thereof |
| CN114562128B (en) * | 2022-03-31 | 2024-03-26 | 中铁城建集团第一工程有限公司 | steel structure factory building maintenance plate reinforcing structure and use method thereof |
| CN115614429A (en) * | 2022-10-09 | 2023-01-17 | 国网安徽省电力有限公司铜陵供电公司 | Balanced shock attenuation damping device |
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Application publication date: 20170215 |
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