CN107974929B - Miniature tuned mass damper - Google Patents
Miniature tuned mass damper Download PDFInfo
- Publication number
- CN107974929B CN107974929B CN201810001911.4A CN201810001911A CN107974929B CN 107974929 B CN107974929 B CN 107974929B CN 201810001911 A CN201810001911 A CN 201810001911A CN 107974929 B CN107974929 B CN 107974929B
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- Prior art keywords
- support frame
- swing rod
- mass block
- mass damper
- tuned mass
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention belongs to structural vibration reduction technical fields, and in particular to a kind of miniature tuned mass damper, including swing rod, mass block and support frame；One end of the swing rod axially and perpendicular to axially above opposite with support frame as described above connects fixedly, and the other end is connect with the mass block；Support frame as described above closes the mass block inside it.It is an object of the invention to: for pendulum length defect existing for existing pendulum-type tuned mass damper, provide a kind of miniature tuned mass damper.The miniature tuned mass damper can be applied to the vibration of control structure any direction, and pendulum length is moderate, can be suitable for the size and power of small main structure or wind-tunnel etc..In conclusion the present invention can be applied to the simulated experiments such as small main structure and wind-tunnel, feasibility reference is provided for the design of scheme.
Description
Technical field
The invention belongs to structural vibration reduction technical fields, and in particular, to a kind of miniature tuned mass damper.
Background technique
Building, machinery field are widely used tuned mass damper and carry out control structure low-frequency vibration；Such as pedestrian's load is made
With the resonance of lower foot bridge, the charming appearance and behaviour of vibration and bridge and cylinder-like structure of the large ratio of height to width structure under wind action
Whirlpool vibration etc..Theoretical and practice proves that tuned mass damper has good inhibitory effect to the vibration with excellent frequency.Especially
It, wind load has larger impact to the vibration of large ratio of height to width structure.In order to guarantee the feasibility of structure construction, at the beginning of design,
It needs to do simulated experiment to structure.In building field, wind tunnel experiment refers to placement building miniatures, learning gas in wind-tunnel
Flowing and its interaction with model, to understand a kind of experimental method for the air dynamic behaviour actually built.Wind-tunnel examination
The size for testing model is often reduced much compared to prototype, is imitated in research damper to vibration damping of the structure under wind action
When fruit, damper is also required to reduce according to the likelihood ratio, at this point, the quality of damper is often no more than 10 grams, currently, being still difficult to do
Mass is so small and the damper that can work normally.
For the direction of structural vibration, it is primarily present following three kinds of situations.First, for the feelings of control structure single vibration
Condition need to only install direction of vibration and the consistent single vibration tuned mass damper in structural vibration direction.Second, being tied for control
Structure vertical two need to generally be hindered to the case where vibration in the single vibration tuning quality that both direction installs control changed course vibration respectively
Buddhist nun's device, engineering suitable for frequency, it is also contemplated that installation pendulum-type tuned mass damper.Third, appointing for control structure
The case where meaning direction vibration, generally use pendulum-type tuned mass damper.
For pendulum-type tuned mass damper, vibration frequency is inversely proportional with pendulum length, and pendulum length belongs to rigidity unit, frequency meter
Calculate formula are as follows:Wherein: f is vibration frequency, and unit is Hz；L is pendulum length, and unit is m；G is acceleration of gravity,
Its value is taken as 9.8m/s2；π is pi, and value is taken as 3.14.
The relationship of table 1 frequency and pendulum length
As known from Table 1, when frequency is less than 0.5Hz, pendulum length is very big, and when frequency is greater than 1Hz, pendulum length very little.To make
The effectiveness in vibration suppression of tuned mass damper is best, and eigentone should be consistent with the vibration frequency of main structure, otherwise subtracts
Vibration effect will decline to a great extent.Therefore, after the frequency for adjusting damper, lead to pendulum-type structure there are pendulum lengths and is excessive or too small
Defect.To obtain ideal pendulum length, it may be designed to physical pendulum, spring can also be added and be designed to combination pendulum, but both structures are very
It is complicated.To sum up, existing pendulum-type tuned mass damper can not be applied to wind tunnel experiment, and practical application is not extensive.
Summary of the invention
It is an object of the invention to: for pendulum length defect existing for existing pendulum-type tuned mass damper, provide a kind of micro-
Type tuned mass damper.The miniature tuned mass damper can be applied to the vibration of control structure any direction, and pendulum length is suitable
In, the size and power of small main structure or wind-tunnel etc. can be suitable for.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
Miniature tuned mass damper, including swing rod, mass block and support frame；One end of the swing rod is axially and vertical
It is directly connected fixedly in axially above opposite with support frame as described above, the other end is connect with the mass block；Support frame as described above will be described
Mass block is closed inside it.Support frame as described above is arranged on the body construction, when main structure is vibrated, the fixation of swing rod
End follows main structure to be subjected to displacement.And mass block, due to the effect of inertia, the free end of swing rod follows mass block together, has
The property for keeping original motion state constant.To make the both ends of swing rod occur approximately perpendicular to axial laterally opposed displacement.
Mass block keeps the effect of original motion state, is transferred to main structure by swing rod, drives damping unit and consumes from main body
The energy that structure transmits, and then realize effectiveness in vibration suppression.In addition, enclosed support frame can prevent the additional of wind mass block generation
Damping reduces the interference to analog result.
For the engineering of tuned mass damper to be arranged, in completion of works, its intrinsic frequency is had determined.For
Keep the effectiveness in vibration suppression of tuned mass damper best, eigentone should be consistent with the eigentone of main structure,
Otherwise effectiveness in vibration suppression will decline to a great extent.The calculation formula of damper frequency are as follows:Wherein: f is vibration frequency, and K is
Rigidity, m are quality.It is found that adjusting the intrinsic frequency of damper there are two types of mode to reach the intrinsic frequency one with main structure
It causes, i.e. the rigidity and quality of damper.
When tuned mass damper mainly utilizes mass block and main structure relative motion, drives damping unit and consume
The energy transmitted from main structure, to realize the purpose of vibration damping.In skyscraper, using concrete floor or specially make
The additional mass such as concrete block, and in television tower, frequently with water tank in high building as mass block.In general, damper matter
The quality of gauge block is the bigger the better, and quality is bigger, and inertia is bigger, maintains the ability of main structure motion state bigger, vibration damping effect
Fruit is better.But the increase of quality might not be directly proportional to the raising of control effect.After it is more than certain value, with matter
The increase of gauge block quality, the raising of vibration control effect is not obvious, and the quality of damper is too big, is bound to cause building structure
Intrinsic frequency reduces significantly, and closer to the frequency of fluctuating wind, increase response.Damping effect is not had not only,
The vibration of structure is exacerbated instead.It is generally believed that damper and the mass ratio of main structure are between 0.005-0.03.To sum up,
There are optimal values for the quality of damper, have determined that when major structure of construction is completed.If adjusting resistance by changing quality
The intrinsic frequency of Buddhist nun's device, will be to lose best vibration damping effect as cost.
To sum up, if the intrinsic frequency of damper need to be adjusted, need to consider emphatically is implementation and the adjusting of its rigidity
The mode of rigidity.However, pendulum length variation greatly, due to tunnel size and is moved after existing pendulum damper is to stiffness tuning
The limitation of power makes it that can not carry out simulated experiment in the design process.This programme controls resistance in such a way that swing rod one end is fixed
The rigidity of Buddhist nun's device, rigidity unit structural form is relatively easy, and rigidity unit be adjusted after to the shadows of other component internal forces
It rings less, and then controls intrinsic frequency, be a good thinking.This programme is suitable for controlling the vibration of the small structure of modal mass
It moves, especially wind tunnel experiment model.Quality can accomplish especially small, and the quality of mass block can be as small as 2 grams, and overall quality can be with
As low as 50 grams.
Preferably, support frame as described above includes sleeve, and is separately positioned on the topmast of the sleeve upper/lower terminal
Support and bottom support frame；Three described in the sleeve, topmast support and the bottom support frame surrounds an enclosure space.This programme mentions
For a kind of enclosed support frame structure, structure is simple, solid and reliable, can be suitable for cancelled structure wind tunnel experiment model and subtract
The vibration damping of vibration and power transmission tower wind tunnel experiment model in wind tunnel experiment.
Preferably, the sleeve is transparent material.Further, the transparent material is organic glass.It is transparent
Material can be visually observed that the Vibration Condition of mass block and swing rod, and using lucite tube as support construction, moreover it is possible to
Play the role of further decreasing overall quality.
It preferably, further include length adjustment mechanism for adjusting the oscillating bar length, the length adjustment knot
Structure is arranged on support frame as described above, and the swing rod is connect with the length adjustment mechanism.The length of swing rod ranges damper
The length of rigidity, swing rod is adjustable, provides a kind of mode for adjusting natural frequency of damper, and application range is wider, simulation vibration damping effect
Fruit is more preferable.In wind tunnel experiment, it is contemplated that need the structure to different modalities quality to test, the intrinsic frequency of main structure is not
Together, it is often necessary to replace different dampers.This programme is changed the intrinsic frequency of damper, is reached by the length of adjusting swing rod
To the purpose for the eigentone for adjusting tuned mass damper, to simulate better effectiveness in vibration suppression.
Preferably, the length adjustment mechanism includes clamping plate and fastening bolt, and the clamping plate is oppositely arranged
Two boards shape structure, the two boards shape structure are connected by fastening bolt, and the swing rod is clamped in the two boards shape knot
Between structure.Mechanical structure is simple, solid and reliable, and simple and quick, convenient for safeguarding.
It preferably, further include damping adjustment device, the damping adjustment device is made of mass block and magnet, institute
Stating mass block is conductor, and the magnet is arranged on support frame as described above, and there are gaps between the magnet and the mass block.If
Damping unit is set, a kind of mode of auxiliary adjustment natural frequency of damper is provided, application range is wider, and simulation effectiveness in vibration suppression is more
It is good.Damping unit is eddy-current damping, damps and is easy to adjust, only adjusts the gap of conductor and magnet.
It as another preferred solution, further include damping adjustment device, the damping adjustment device is by mass block and conductor group
At；The mass block is magnet, and the conductor is arranged on support frame as described above；Between the conductor and the mass block there are
Gap.Damping unit is set, a kind of mode of auxiliary adjustment natural frequency of damper is provided, application range is wider, simulation vibration damping effect
Fruit is more preferable.Damping unit is eddy-current damping, damps and is easy to adjust, only adjusts the gap of conductor and magnet.
Preferably, the girder construction that the swing rod is vertically arranged.Girder construction bears the transverse direction perpendicular to axis
The rod piece of load.This programme is mainly applied and the oscillation crosswise of control main structure, by the swing rod and main body as rigidity unit
Structure is mutually perpendicular to, and can achieve optimal effectiveness in vibration suppression.
In conclusion by adopting the above-described technical solution, compared with the prior art, the beneficial effects of the present invention are: one
The case where vibration frequency of aspect, any direction of the present invention is all the same, can be applied to the vibration of control structure any direction, such as mould
Draft experiment controls vibration of the tall and slender structure under wind action.On the other hand, quality directly with the design of major structure of construction
Bearing capacity is related, pulls one hair and move the whole body, and adjusts quality and is related to the variation of numerous component internal forces, involves many areas and uneconomical.
For mass unit adjusting there are many unfavorable, the present invention adjusts the rigidity of damper by adjusting the length of swing rod, into
And the eigentone of damper is controlled, but without being bound by the length of swing rod.Therefore, the present invention can be applied to small main body
The simulated experiments such as structure and wind-tunnel provide feasibility reference for the design of scheme.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Corresponding component names are marked in attached drawing are as follows:
1- swing rod；
2- mass block；
3- support frame, 31- sleeve, 32- topmast support, the bottom 33- support frame；
4- length adjustment mechanism, 41- clamping plate, 42- fastening bolt；
5- damping adjustment device, 51- magnet；
A- main structure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
The present embodiment discloses a kind of miniature tuned mass damper, as shown in Figure 1, including swing rod 1, mass block 2 and support
Frame 3.The swing rod 1 uses Steel material.It axially and perpendicular to axial direction goes up and 3 phase of support frame as described above one end of the swing rod 1
To being permanently connected, the other end is connect with the mass block 2；Support frame as described above 3 closes the mass block 2 inside it.Institute
It states support frame 3 to be arranged on main structure A, the fixing end of the swing rod 1 and the main structure A are relatively fixed.The swing rod 1
The girder construction being vertically arranged, i.e., it is orthogonal with the direction of vibration of main structure A.Swing rod 1 need to do analysis of fatigue, guarantee swing rod
The 1 not fatigue rupture under action of long-term load.Swing rod 1 is connected by the way that fix opposite with main structure A is arranged on support frame 3,
Keep the production, installation and maintenance of damper more convenient, swing rod 1 is prevented to be directly installed on the main structure A to main structure A
Structure have an impact.
The support frame 3 of the present embodiment includes sleeve 31, and is separately positioned on the top support of 31 upper/lower terminal of sleeve
Frame 32 and bottom support frame 33；Three described in the sleeve 31, topmast support 32 and the bottom support frame 33 surrounds an enclosure space.
The sleeve 31 is transparent material.Support frame 3 uses the combination of steel structure and organic glass material, wherein the top
Support frame 32 and the bottom support frame 33 are steel construction, and the sleeve 31 is organic glass, and three is fixed to each other company by bolt
It connects.
The present embodiment further includes the length adjustment mechanism 4 for adjusting 1 length of swing rod, the structure of adjusting length 4
It is arranged on support frame as described above 3, the swing rod 1 is connect with the length adjustment mechanism 4.Specifically, the length adjustment mechanism 4
Including clamping plate 41 and fastening bolt 42, the clamping plate 41 is the two boards shape structure being oppositely arranged, and the two boards shape structure is logical
The connection of fastening bolt 42 is crossed, the swing rod 1 is clamped between the two boards shape structure.When need to adjust the length of swing rod 1, rotation
Elastic fixing bolt 42 discharges swing rod 1, swing rod 1 is adjusted to required length, screws fastening bolt 42 again.
The present embodiment further includes damping adjustment device 5, and damping adjustment device 5 uses eddy-current damping mode.Specifically, institute
It states damping adjustment device 5 to be made of mass block 2 and magnet 51, the mass block 2 is conductor, and the magnet 51 is arranged in the branch
On support 3, there are gaps between the magnet 51 and the mass block 2.The magnet 51 uses magnetic steel material, the mass block
2 use copper product.
The present embodiment is suitable for controlling the vibration of the small structure of modal mass, such as wind tunnel experiment model.Quality can be made
Especially small, the quality of mass block can be as small as 2 grams, and overall quality can be as small as 50 grams.Using lucite tube as support knot
Structure plays a part of to reduce overall quality.For example, being used for cancelled structure wind tunnel experiment model vibration damping, power transmission tower wind tunnel experiment mould
Vibration damping of the type in wind tunnel experiment；Enclosed lucite tube can prevent wind swing rod from generating additional damping.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. miniature tuned mass damper, it is characterised in that: including swing rod (1), mass block (2) and for being arranged in main structure
(A) support frame (3) on；One end of the swing rod (1) is axially and perpendicular to axial upper relatively solid with support frame as described above (3)
Surely it connects, the other end is connect with the mass block (2)；Support frame as described above (3) closes the mass block (2) inside it；
It further include the length adjustment mechanism (4) for adjusting the swing rod (1) length, the structure of adjusting length (4) is arranged described
On support frame (3), the swing rod (1) connect with the length adjustment mechanism (4)；The beam knot that the swing rod (1) is vertically arranged
Structure.
2. miniature tuned mass damper according to claim 1, it is characterised in that: support frame as described above (3) includes sleeve
(31), the topmast support (32) and bottom support frame (33) of the sleeve (31) upper/lower terminal are separately positioned on and；The sleeve
(31), topmast support (32) and the bottom support frame (33) three surround an enclosure space.
3. miniature tuned mass damper according to claim 2, it is characterised in that: the sleeve (31) is transparent material
Matter.
4. miniature tuned mass damper according to claim 3, it is characterised in that: the transparent material is organic glass
Glass.
5. miniature tuned mass damper according to claim 1, it is characterised in that: length adjustment mechanism (4) packet
Clamping plate (41) and fastening bolt (42) are included, the clamping plate (41) is the two boards shape structure being oppositely arranged, the two boards shape knot
Structure is connected by fastening bolt (42), and the swing rod (1) is clamped between the two boards shape structure.
6. miniature tuned mass damper according to claim 1, it is characterised in that: it further include damping adjustment device (5),
The damping adjustment device (5) is made of mass block (2) and magnet (51)；The mass block (2) is conductor, the magnet (51)
It is arranged on support frame as described above (3)；There are gaps between the magnet (51) and the mass block (2).
7. miniature tuned mass damper according to claim 1, it is characterised in that: it further include damping adjustment device (5),
The damping adjustment device (5) is made of mass block (2) and conductor；The mass block (2) is magnet, and the conductor is arranged in institute
It states on support frame (3)；There are gaps between the conductor and the mass block (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001911.4A CN107974929B (en) | 2018-01-02 | 2018-01-02 | Miniature tuned mass damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810001911.4A CN107974929B (en) | 2018-01-02 | 2018-01-02 | Miniature tuned mass damper |
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| Publication Number | Publication Date |
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| CN107974929A CN107974929A (en) | 2018-05-01 |
| CN107974929B true CN107974929B (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810001911.4A Active CN107974929B (en) | 2018-01-02 | 2018-01-02 | Miniature tuned mass damper |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109115450B (en) * | 2018-10-24 | 2024-03-29 | 浙江大学 | Wind tunnel model damper and wind tunnel model assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108771A (en) * | 1996-06-21 | 1998-01-13 | Mitsubishi Steel Mfg Co Ltd | Damper for building |
| CN101761146A (en) * | 2010-01-04 | 2010-06-30 | 湖南大学 | Permanent-magnet type eddy current tuned mass damper |
| CN102031751A (en) * | 2010-12-23 | 2011-04-27 | 湖南大学 | Big-tonnage cantilever type horizontal tuned mass damper for regulating eddy-current damping |
| CN203284906U (en) * | 2013-05-24 | 2013-11-13 | 柳州东方工程橡胶制品有限公司 | Permanent magnet type eddy current cantilever beam tuned mass damper |
| CN104500632A (en) * | 2014-12-02 | 2015-04-08 | 华北水利水电大学 | Tuned mass damper for vibration-damping experiment of structure model and design method |
| CN106337591A (en) * | 2016-09-30 | 2017-01-18 | 陈政清 | Novel pendulum-type eddy current damping tuned mass vibration absorber |
-
2018
- 2018-01-02 CN CN201810001911.4A patent/CN107974929B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108771A (en) * | 1996-06-21 | 1998-01-13 | Mitsubishi Steel Mfg Co Ltd | Damper for building |
| CN101761146A (en) * | 2010-01-04 | 2010-06-30 | 湖南大学 | Permanent-magnet type eddy current tuned mass damper |
| CN102031751A (en) * | 2010-12-23 | 2011-04-27 | 湖南大学 | Big-tonnage cantilever type horizontal tuned mass damper for regulating eddy-current damping |
| CN203284906U (en) * | 2013-05-24 | 2013-11-13 | 柳州东方工程橡胶制品有限公司 | Permanent magnet type eddy current cantilever beam tuned mass damper |
| CN104500632A (en) * | 2014-12-02 | 2015-04-08 | 华北水利水电大学 | Tuned mass damper for vibration-damping experiment of structure model and design method |
| CN106337591A (en) * | 2016-09-30 | 2017-01-18 | 陈政清 | Novel pendulum-type eddy current damping tuned mass vibration absorber |
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| CN107974929A (en) | 2018-05-01 |
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