CN207144221U - A kind of frequency-adjustable tuned mass damper - Google Patents
A kind of frequency-adjustable tuned mass damper Download PDFInfo
- Publication number
- CN207144221U CN207144221U CN201720896882.3U CN201720896882U CN207144221U CN 207144221 U CN207144221 U CN 207144221U CN 201720896882 U CN201720896882 U CN 201720896882U CN 207144221 U CN207144221 U CN 207144221U
- Authority
- CN
- China
- Prior art keywords
- spring
- mass
- frequency
- frequency modulation
- base
- 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.)
- Expired - Fee Related
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a kind of frequency-adjustable tuned mass damper, including base, main spring, guide rod, mass and frequency modulation spring, the square installation of the base is provided with mass fixed plate, multiple main springs are installed between base and mass fixed plate, the both ends of main spring are against base and mass fixed plate respectively, it is T-shaped mass that section is provided with mass fixed plate, multiple frequency modulation springs are provided between mass and base, multiple frequency modulation springs are arranged symmetrically on the line of symmetry on base length direction, and the mounting plane of frequency modulation spring is different from the mounting plane of main spring, i.e. the mounting plane of frequency modulation spring is below or above the mounting plane of main spring, the beneficial effects of the utility model are：It is capable of near intrinsic frequency to Selection of Urban Pedestrian Overpass, the boarding bridge resonant frequency of quick regulation tuned mass damper, effectively reduces vibration of the longspan structures such as Selection of Urban Pedestrian Overpass, boarding bridge under people's row energization.
Description
Technical field
Civil engineering structure antivibration area is the utility model is related to, specifically a kind of frequency-adjustable tuning quality resistance
Buddhist nun's device.
Background technology
In order to solve the level-crossing probrem of urban road pedestrian and motor vehicle, foot bridge obtains in China's urban construction
Extensive use.With the raising of bridge span, under-clearance and the requirement such as attractive in appearance, foot bridge uses high intensity more and more
Light material, bridge type also develop to large span direction.Because overpass uses longspan structure form, the rigidity of structure and damping
Smaller, the Vertical Resonance frequency of overpass is relatively low, causes overpass more and more sensitive to pedestrian's excitation, easily produces people's bridge
Resonance causes that pedestrian's on bridge is panic or uncomfortable, or even causes overpass self structure to damage, and threatens pedestrian's life security.
When the section of foot bridge and span are by stricter limited, it is not avoided that still in itself by optimizing foot bridge structure merely
People's bridge resonates, while the longspan structure such as boarding bridge is there is also same resonance problem, a kind of effective way be greatly across
Spending increases tuned mass damper (TMD) in structure, carry out energy-eliminating shock-absorbing processing.According to practical engineering project experience, people's row day
Bridge needs to lay bridge floor and finishing after building, and sometimes the true vertical resonant frequency of overpass and designing unit are theoretical
There is deviation in the Vertical Resonance frequency of calculating, at this moment need to readjust（By theoretical Frequency Design）TMD frequency is close to people
The Vertical Resonance frequency of row bridge.Existing tuned mass damper vibration absorber changes TMD certainly by adjusting the quality of mass
Body intrinsic frequency, such a method frequency-tuning range is small, and regulation process needs to dismantle TMD, and process is complicated laborious time-consuming and adjusts
The quality of mass is not optimal weight after frequency, and effectiveness in vibration suppression reduces.If run into frequency departure it is big when, can not be by adjusting matter
TMD frequencies are adjusted to the foot bridge natural frequency of vibration, it is necessary to dismantle TMD by the quality of gauge block, redesign production spring, extension is applied
The work cycle, and erecting bed condition is simple and crude, and installation process is more complicated.
Utility model content
The purpose of this utility model is to provide a kind of frequency-adjustable tuned mass damper, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the utility model provides following technical scheme：
A kind of frequency-adjustable tuned mass damper, including base, main spring, guide rod, mass and frequency modulation spring,
The square installation of the base is provided with mass fixed plate, and multiple main springs are provided between base and mass fixed plate, main
The both ends of spring are against base and mass fixed plate respectively, and it is T-shaped mass that section is provided with mass fixed plate,
Multiple frequency modulation springs are provided between mass and base, multiple frequency modulation springs are on the symmetrical cloth of line of symmetry on base length direction
Put, and the mounting plane of frequency modulation spring is different from the mounting plane of main spring, i.e. the mounting plane of frequency modulation spring is below or above
The mounting plane of main spring, the central diameter and line footpath of main spring and frequency modulation spring are different, have different bearing capacity and stiffness, bottom
It is provided with the corner of seat and is used for the guide rod being oriented to that moved up and down to mass.
As further program of the utility model：Main spring and the frequency modulation spring is spiral steel compression spring or drawing
Spring is stretched, the rigidity of main spring is more than more than 5 times of frequency modulation spring rate.
As the utility model further scheme：The quantity of the main spring immobilizes and is even number, main spring
It is arranged in parallel with frequency modulation spring, the variable amounts of frequency modulation spring.
As the utility model further scheme：Multiple resistances are also equipped between base and the mass fixed plate
Buddhist nun's device, damper are symmetricly set on the short side of base.
As the utility model further scheme：Rolling bearing is provided between guide rod and the mass fixed plate
Or sliding bearing.
Compared with prior art, the beneficial effects of the utility model are：It is capable of consolidating for quick regulation tuned mass damper
Have near frequency to Selection of Urban Pedestrian Overpass, boarding bridge resonant frequency, effectively reduce Selection of Urban Pedestrian Overpass, boarding bridge etc.
Vibration of the longspan structure under people's row energization, comfort level of the pedestrian when being walked on longspan structure is improved, there is structure letter
It is single, easy for installation, tuning range is wide, stability is good.
Brief description of the drawings
Fig. 1 is a kind of front view of frequency-adjustable tuned mass damper.
Fig. 2 is a kind of top view of frequency-adjustable tuned mass damper.
In figure：1- bases, 2- main springs, 3- bearings, 4- guide rods, 5- masses, 6- dampers, 7- frequency modulation spring, 8-
Mass fixed plate.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Refer to Fig. 1~2, in the utility model embodiment, a kind of frequency-adjustable tuned mass damper, including base
1st, main spring 2, guide rod 4, mass 5 and frequency modulation spring 7, the square installation of the base 1 are provided with mass fixed plate 8, bottom
Multiple main springs 2 are installed between seat 1 and mass fixed plate 8, the both ends of main spring 2 are against base 1 respectively and mass is consolidated
Fixed board 8, it is T-shaped mass 5 to be provided with section in mass fixed plate 8, and multiple tune are provided between mass 5 and base 1
Frequency spring 7, multiple frequency modulation springs 7 are arranged symmetrically on the line of symmetry on the length direction of base 1, and the installation of frequency modulation spring 7 is put down
Face is different from the mounting plane of main spring 2, i.e., the mounting plane of frequency modulation spring 7 is below or above the mounting plane of main spring 2, main
The central diameter and line footpath of spring 2 and frequency modulation spring 7 are different, have different bearing capacity and stiffness, are provided with and use at the corner of base 1
In the guide rod 4 being oriented to the up and down motion of mass 5, it is oriented to for mass vertical motion.
The main spring 2 and frequency modulation spring 7 are spiral steel compression spring or extension spring, and the rigidity of main spring 2 is more than
More than 5 times of the rigidity of frequency modulation spring 7.
The quantity of the main spring 2 is immobilized and is even number, and main spring 2 and frequency modulation spring 7 are arranged in parallel, frequency modulation spring
7 variable amounts, the quantity by increasing and decreasing frequency modulation spring 7 change the integral rigidity of spring in tuned mass damper, realize and adjust
The regulation of humorous mass damper intrinsic frequency.
Multiple dampers 6 are also equipped between the base 1 and mass fixed plate 8, damper 6 is symmetricly set on base
On 1 short side.
Rolling bearing or sliding bearing are provided between the guide rod 4 and mass fixed plate 8, makes mass 5 along guiding
The direction of bar 4 vibrates, and limits the horizontal hunting of tuning quality block.
Operation principle of the present utility model is：TMD is manufactured in the theoretical resonant frequency design for being first according to overpass,
TMD is installed in parallel 4 main springs and 4 frequency modulation springs, and 4 main springs are distributed on TMD four angles, and frequency modulation spring is symmetrically equal
Cloth is arranged on TMD long side centre position, and reserves the installing space of 12 frequency modulation springs, and the mounting plane of main spring is higher than tune
The mounting plane of frequency spring, damper arrangement is in TMD short sides centre position.4 are installed in the mass above TMD main springs
Rolling bearing, guide rod are fixed on bottom plate after passing through bearing and main spring.Secondly during TMD installation and debugging, TMD is integrally hung
It is installed on the bottom plate of overpass box beam, can uses welding or fastener that TMD is fixed on box beam bottom plate, then measure
The natural frequency of vibration of overpass.TMD formula for natural frequency is：
F is TMD intrinsic frequency in formula
M is the quality of TMD masses
K is the global stiffness of TMD inner springs
Mass is the optimized parameter determined according to the vibration isolation requirement of foot bridge in TMD, if changing the parameter will influence
Effectiveness in vibration suppression, can only change the rigidity k of spring according to TMD formula for natural frequency could change TMD intrinsic frequency.If people's row
The measurement frequency of overline bridge is more than TMD design frequency, and increasing required for determining spring in TMD is calculated according to overpass resonant frequency
The rigidity added, it is that can determine that the quantity of increase frequency modulation spring to remove frequency modulation spring rate by the increased rigidity of spring, uses special tool
Tool is put into spring retainer circle after frequency modulation is suppressed into contracting, TMD frequencies is reached near the resonant frequency of overpass；If people's row
The measurement frequency of overline bridge is less than TMD design frequency, is calculated according to overpass resonant frequency and subtracted required for determining spring in TMD
Few rigidity, it is that can determine that the quantity for reducing frequency modulation spring to remove frequency modulation spring rate by the rigidity of spring reduction, uses special tool
Tool takes out frequency modulation bullet from TMD, TMD frequencies is reached near the resonant frequency of overpass.Overpass or airport boarding
Bridge Mounting frequency adjustable tuning mass damper, TMD frequencies conveniently can be adjusted to overpass or airport is stepped on
Near the natural frequency of vibration of machine bridge, without adjusting mass quality.When pedestrian is walking on overpass or boarding bridge, adjust
Humorous mass damper is resonated with bridge, and the inertia force of tuning quality damping is acted on overpass or boarding bridge, offsets people
Row energization, reduce the vibration of overpass or boarding bridge, improve people when being walked on overpass or boarding bridge
Comfort level, ensure the security of overpass or boarding bridge.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (5)
1. a kind of frequency-adjustable tuned mass damper, including base, main spring, guide rod, mass and frequency modulation spring, its
It is characterised by, the square installation of the base is provided with mass fixed plate, is provided between base and mass fixed plate multiple
Main spring, the both ends of main spring are against base and mass fixed plate respectively, and it is T-shaped that section is provided with mass fixed plate
Mass, multiple frequency modulation springs are provided between mass and base, multiple frequency modulation springs are on pair on base length direction
Title line is arranged symmetrically, and the mounting plane of frequency modulation spring is different from the mounting plane of main spring, i.e. the mounting plane of frequency modulation spring
Below or above the mounting plane of main spring, the central diameter and line footpath of main spring and frequency modulation spring are different, have different carryings
Power and rigidity, it is provided with the corner of base and is used for the guide rod being oriented to that moved up and down to mass.
A kind of 2. frequency-adjustable tuned mass damper according to claim 1, it is characterised in that the main spring and
Frequency modulation spring is spiral steel compression spring or extension spring, and the rigidity of main spring is more than more than 5 times of frequency modulation spring rate.
3. a kind of frequency-adjustable tuned mass damper according to claim 2, it is characterised in that the main spring
Quantity is immobilized and is even number, and main spring and frequency modulation spring are arranged in parallel, the variable amounts of frequency modulation spring.
4. a kind of frequency-adjustable tuned mass damper according to claim 3, it is characterised in that the base and matter
Multiple dampers are also equipped between gauge block fixed plate, damper is symmetricly set on the short side of base.
A kind of 5. frequency-adjustable tuned mass damper according to claim 4, it is characterised in that the guide rod and
Rolling bearing or sliding bearing are provided between mass fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720896882.3U CN207144221U (en) | 2017-07-24 | 2017-07-24 | A kind of frequency-adjustable tuned mass damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720896882.3U CN207144221U (en) | 2017-07-24 | 2017-07-24 | A kind of frequency-adjustable tuned mass damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207144221U true CN207144221U (en) | 2018-03-27 |
Family
ID=61676552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720896882.3U Expired - Fee Related CN207144221U (en) | 2017-07-24 | 2017-07-24 | A kind of frequency-adjustable tuned mass damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207144221U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083974A (en) * | 2018-11-06 | 2018-12-25 | 河海大学 | A kind of intelligent frequency modulation vibration abatement of fluid reservoir |
| CN113108003A (en) * | 2021-03-24 | 2021-07-13 | 浙江合众新能源汽车有限公司 | Variable-frequency vibration tuner and configuration method |
-
2017
- 2017-07-24 CN CN201720896882.3U patent/CN207144221U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083974A (en) * | 2018-11-06 | 2018-12-25 | 河海大学 | A kind of intelligent frequency modulation vibration abatement of fluid reservoir |
| CN109083974B (en) * | 2018-11-06 | 2020-05-22 | 河海大学 | Intelligent frequency modulation shock-proof device for liquid storage tank |
| CN113108003A (en) * | 2021-03-24 | 2021-07-13 | 浙江合众新能源汽车有限公司 | Variable-frequency vibration tuner and configuration method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103074947B (en) | Tuned mass damper adjustable in three directions | |
| CN103437447B (en) | Low-frequency swing-type tuned mass damper | |
| Weber et al. | Assessment of long-term behavior of tuned mass dampers by system identification | |
| CN207144221U (en) | A kind of frequency-adjustable tuned mass damper | |
| CN202117195U (en) | Vibration absorber with multiple natural frequencies | |
| CN101806104B (en) | Suspended frequency modulation mass damper | |
| CN105386403A (en) | Assembled type current vortex tuned mass damper for pedestrian bridge and manufacturing method | |
| CN105133744B (en) | Tuned mass damper structure with continuously variable frequency | |
| CN106677366B (en) | A kind of tuning quality damping unit | |
| CN205035929U (en) | But frequency continuous variation's harmonious mass damper structure | |
| CN102995787A (en) | Rolling mass tuning damper | |
| Bruno et al. | Pedestrian-induced torsional vibrations of suspended footbridges: Proposal and evaluation of vibration countermeasures | |
| CN105975730A (en) | Multi-tuned mass damper vibration absorption design method for arc-shaped steel gate | |
| CN106368085B (en) | Energy-absorbing and vibration-damping device of track structure | |
| CN109898691A (en) | A kind of damping earthing type assembled steel reinforced concrete tuning quality damping wall | |
| CN205501804U (en) | Two limbs are friction energy dissipation shock attenuation binder for pier | |
| KR101166258B1 (en) | Vibration control device of construction structure | |
| Ghorbanzadeh et al. | Seismic performance assessment of semi active tuned mass damper in an MRF steel building including nonlinear soil–pile–structure interaction | |
| CN108049625A (en) | A kind of anti-wind shake hanging basket of high-rise outer wall decoration construction for being capable of self-balancing | |
| CN201660980U (en) | Suspended frequency modulation mass damper | |
| CN207919257U (en) | A kind of fatigue crack-resistant ω types fastener high frequency spring | |
| CN103939521A (en) | Passive mixing damping device including vibration isolator and nonlinear energy sink and design method of passive mixing damping device | |
| CN108799390B (en) | Vibration damper and parameter adjusting method thereof | |
| CN106436947B (en) | A kind of damping device and its design method for longspan structure | |
| McManus et al. | Damping in cantilevered traffic signal structures under forced vibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180327 Termination date: 20200724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |