CN201660980U - Suspended frequency modulation mass damper - Google Patents

Suspended frequency modulation mass damper Download PDF

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Publication number
CN201660980U
CN201660980U CN2010201474750U CN201020147475U CN201660980U CN 201660980 U CN201660980 U CN 201660980U CN 2010201474750 U CN2010201474750 U CN 2010201474750U CN 201020147475 U CN201020147475 U CN 201020147475U CN 201660980 U CN201660980 U CN 201660980U
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CN
China
Prior art keywords
damper
spring
mass
guide rod
fluid damper
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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.)
Expired - Fee Related
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CN2010201474750U
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Chinese (zh)
Inventor
张志强
李爱群
刘康安
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Southeast University
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Southeast University
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Priority to CN2010201474750U priority Critical patent/CN201660980U/en
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Publication of CN201660980U publication Critical patent/CN201660980U/en
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Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a suspended frequency modulation mass damper, which comprises a spring, a mass block and a viscosity fluid damper, wherein the mass block is suspended on an upper suspended beam or a top plate through the spring and the viscosity fluid damper, the viscosity fluid damper mainly consists of a sealed cylinder tube, a guide rod and a piston, the guide rod passes through the cylinder tube and can upwards and downwards slide, the piston is fixed on the guide rod, and the damping factor of the viscosity fluid damper is changed along with the change of the displacement of the viscosity fluid damper. The device of the utility model can control the vertical vibration, and has the advantages of simple device structure, small occupied volume ratio and high space utilization rate.

Description

A kind of tuned mass damper, TMD of suspension
Technical field
The utility model relates to the vibration absorber of a kind of long span bridge beam and the response of building (room) lid vertical motion, relates in particular to a kind of mass damper of suspension.
Background technology
Along with the needs of economy and urban construction and development, the span and the scale of building and bridge are increasing, and wherein representational is physical culture, conference ﹠ exhibition and Aerodrome Construction and long span bridge beam.Very great change had taken place in the building design and construction technology in recent years, the progress of computational methods, the use of light-weight high-strength material make that structural system becomes lighter, gentleer, damping is littler, and designer trends are to cross over long span with the structural system of minimum weight, the rigidity and the damping of structure have so just been reduced, make that natural frequency and wind and People's Bank of China's moving load frequency ratio of long span bridge beam and building (room) lid are more approaching, cause the vertical motion response bigger, influence the safety and normal use of structure, also cause durability of structures to reduce easily.In addition, vibration often surpasses the requirement of human comfort, usually can bring sense of discomfort to people, causes the user anxiety even panic psychology to occur, has reduced the working environment quality, has influenced operating efficiency.The existence of these problems will directly cause the reduction of structure applicable performance.Traditional method for designing, by changing the rigidity and the structural shape of structure, the frequency that improves structure reduces structural vibrations basically; But from the angle of Technological Economy, attractive in appearance and space utilization, this is irrational under many circumstances.The opposite oscillation damping method of tuned mass damper, TMD that adopts solves the problems referred to above, then is a kind of economy and rational solution.
The tuned mass damper, TMD formula is used one of structure passive control device the earliest, the vibrational system of being made up of spring, damper and mass.When main structure produces vibration under the incentive action outside, drive tuned mass damper, TMD and vibrate together, the inertia force of its generation reacts on the structure, and the energy dissipating effect is also brought into play in its damping, makes the vibration reaction decay of main structure and is controlled.Its advantage is succinct, reliable, effective and low-cost.
At present, utilize tuned mass damper, TMD that structure is carried out vibration damping control having carried out a large amount of theory analysises and experimental study, tuned mass damper, TMD has been widely used in the structural vibration control of civil engineering simultaneously.But, these researchs and use mainly to concentrate on and utilize the horizontal vibration of tuned mass damper, TMD control structure under earthquake and wind effect, the research of the vertical motion of control structure and use less; And applied tuned mass damper, TMD is passive device, and is unadjustable, can't regulate the frequency of self, and energy dissipation capacity is relatively poor, also can't eliminate the adverse effect of damper internal friction fully.
Summary of the invention
Goal of the invention: the purpose of this utility model is at the deficiencies in the prior art, and a kind of controllable type tuned mass damper, TMD that can efficiently consume energy and can eliminate the suspension of damper internal friction is provided.
Technical scheme: the tuned mass damper, TMD of suspension described in the utility model, comprise spring, mass and viscous fluid damper, described mass is suspended on overarm or the upper plate by spring and viscous fluid damper, and the damped coefficient of described viscous fluid damper changes along with the variation of viscous fluid damper displacement.
The damped coefficient of the damper of viscous fluid described in the utility model changes, can be achieved by the following scheme: described viscous fluid damper is mainly by the cylinder barrel that seals, pass that described cylinder barrel can slide up and down guide rod and the piston that is fixed on the guide rod constitutes, described piston is provided with the constant damp channel of radius, the long rod of damping is arranged in the described cylinder barrel, and pass damp channel on the described piston, when described piston moves to different displacement, the radius of the long rod of corresponding damping does not wait, thereby adjust damping hole radius R size variation, and then cause damped coefficient to change.
The utility model is controlled the size of damping hole jointly by piston and specially designed damper bar: in the stroke of piston motion, in the distance center point certain distance scope, it is bigger that damping hole is provided with; When piston motion then is changed to another kind of small-bore when distance center is put beyond this distance range.Each needs great damping force in two sections strokes, all can be by preestablishing the pore size in every section stroke range, thus can control damping and maximum damping force in this section stroke.
The guide rod upper end of described viscous fluid damper is an earrings, and described earrings is connected with described upper plate with the axle bulb by the outer cover flange; The lower end of the guide rod of described viscous fluid damper inserts in the mass, and can be free to slide; Fixedly connected with described mass in the lower end that is enclosed within the cylinder barrel of guide rod outside.
The two ends of described spring are connected with described mass with described overarm (or upper plate) by bolt respectively.What spring occurred in order to prevent to be subjected to lateral force vacillates now to the left, now to the right, even takes place out of control and phenomenon such as topple, and at described spring inner guiding device is set, and described guiding device is made up of guide peg and fairlead.
In order to change the number of effective coils of spring arbitrarily, adjust the rigidity of spring, elimination is owing to the structure actual frequency that reason caused and the inconsistent influence of calculated rate of aspects such as calculating or construction, the rigidity adjustable plate is set on described spring, and described rigidity adjustable plate is fixed on the described fairlead by positioning bolt.
Beneficial effect: the utility model compared with prior art, its beneficial effect is: 1, the viscous fluid damper in the utility model device is designed to the damper of variable coefficient, promptly under little displacement, produce little damped coefficient even be zero, big displacement produces big damped coefficient down, can eliminating the damper internal friction, to cause system to start sensitivity relatively poor and hysteresis occurs, can improve the energy dissipation capacity of damper simultaneously; 2, the utility model device can be controlled vertical motion, and apparatus structure is simple, and it is less to take volume ratio, the space availability ratio height; 3, the utility model device is by two-way guide locating device provided in being provided with in spring assembly, and what occur in the time of can effectively preventing to be subjected to lateral force vacillates now to the left, now to the right, even takes place out of control and phenomenon such as topple; 4, the utility model device is regulated pressing plate by positioning bolt and rigidity, can change the number of effective coils of spring according to on-the-spot dynamic characteristics measured result, the rigidity of Adjustment System, elimination improves the working control effect of system owing to the structure actual frequency that reason caused and the inconsistent influence of calculated rate of aspects such as calculating or construction.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 1;
Fig. 4 is the structural representation of the viscous fluid damper in the utility model device;
Among Fig. 5, (a) be the structural representation of the long rod of damping in the utility model device; (b) be A-A sectional view in (a).
The specific embodiment
Below in conjunction with accompanying drawing, the mode by embodiment is elaborated to technical solutions of the utility model, but protection domain of the present utility model is not limited to described embodiment.
Shown in Fig. 1~3, a kind of tuned mass damper, TMD of suspension, comprise spring 1, mass 2 and viscous fluid damper 3, described mass 2 is suspended on overarm or the top board 4 by spring 1 and viscous fluid damper 3, described viscous fluid damper 3 is mainly by the cylinder barrel 7 that seals, pass that described cylinder barrel 7 can slide up and down guide rod 8 and the piston 9 that is fixed on the guide rod 8 constitutes, described piston 9 is provided with the constant damp channel of radius 11, the long rod 10 of damping is arranged in the described cylinder barrel 7, and pass damp channel 11 on the described piston 9, when described piston 9 moves to different displacement, the radius of the long rod 10 of corresponding damping does not wait, thereby adjust damping hole radius R size variation, and then cause damped coefficient to change.
Represent the displacement of plunger distance central point with u, the damped coefficient of damper is Ci (i=1,2), and Z1 is the distance that damped coefficient changes separation distance center point, and Z2 represents the range of damper; Then the two-part controllable damping can be expressed as:
When | u|≤Z1, the damping aperture is R1, and damped coefficient is C1;
When Z1<| during u|≤Z2, the damping aperture is R2, and damped coefficient is C2;
The damped coefficient of a multistage also can be set certainly, as required.
Guide rod 8 upper ends of described viscous fluid damper 3 are earrings 16, and described earrings 16 is connected with described upper plate 4 with axle bulb 15 by outer cover flange 17; Insert in the mass 2 guide rod 8 lower ends of described viscous fluid damper 3, and can be free to slide; Fixedly connected with described mass 2 in the lower end that is enclosed within the cylinder barrel 7 of described guide rod 8.
The two ends of described spring 1 are connected with described mass 2 with described upper plate 4 by bolt 14 respectively; Described spring 1 inside is provided with guiding device, and described guiding device is made up of guide peg 5 and fairlead 6; Described spring 1 is provided with rigidity adjustable plate 12, and described rigidity adjustable plate 12 is fixed on the described fairlead 6 by positioning bolt 13.
The concrete assembly method of the tuned mass damper, TMD of suspension described in the utility model is:
The parts that need all to be prepared assembling before installation demagnetize, deburring, clean and dry, and concrete installation steps are as follows:
1, fairlead 6 and guide peg 5 are respectively charged into spring 1, the matching requirements two ends are concordant;
2, penetrate hex bolts 14 in the hole on mass 2, and mix spring washer, screw on then that spring system is made up of spring 1, fairlead 6 and guide peg 5 and fixing;
3, viscous fluid damper 3 is installed on mass 2, is tightened fixingly with soket head cap screw, outer cover blue 17 and axle bulb 15 are installed on viscous fluid damper 3 then and are screwed;
4, install top board 4, check and the gap and the mated condition of Control Shaft bulb 15 and axle bulb outer cover flange 17 and axle bulb 15 and upper plate 4, soket head cap screw is penetrated in the connecting hole on the bulb outer cover flange 17 and fastening.Penetrate soket head cap screw 14 at upper plate 4 back sides then, form by spring 1, fairlead 6 and guide peg 5 with spring system and be tightened;
5,1/4,1/2,3/4 and 1 circle place of last initial circle on spring 1 bottom doubling-up mounting spring adjustable plate 12, turret head positioning bolt 13 and spring washer respectively is by fixing, loosen or cancelling the size of adjusting spring rate.

Claims (5)

1. the tuned mass damper, TMD of a suspension, comprise spring (1), mass (2) and viscous fluid damper (3), described mass (2) is suspended on overarm or the top board (4) by spring (1) and viscous fluid damper (3), it is characterized in that: described viscous fluid damper (3) is mainly by the cylinder barrel (7) that seals, pass that described cylinder barrel (7) can slide up and down guide rod (8) and the piston (9) that is fixed on the guide rod (8) constitutes, described piston (9) is provided with the constant damp channel of radius (11), the long rod of damping (10) is arranged in the described cylinder barrel (7), and passes the damp channel (11) on the described piston (9).
2. the tuned mass damper, TMD of suspension according to claim 1, it is characterized in that: guide rod (8) upper end of described viscous fluid damper (3) is earrings (16), and described earrings (16) is connected with described upper plate (4) with axle bulb (15) by outer cover flange (17); Insert in the mass (2) guide rod (8) lower end of described viscous fluid damper (3), and can be free to slide; Fixedly connected with described mass (2) in the lower end that is enclosed within the cylinder barrel (7) of described guide rod (8).
3. the tuned mass damper, TMD of suspension according to claim 1 is characterized in that: the two ends of described spring (1) are connected with described mass (2) with described upper plate (4) by bolt (14) respectively.
4. according to the tuned mass damper, TMD of the described suspension of arbitrary claim in the claim 1~4, it is characterized in that: described spring (1) inside is provided with guiding device, and described guiding device is made up of guide peg (5) and fairlead (6).
5. the tuned mass damper, TMD of suspension according to claim 4, it is characterized in that: described spring (1) is provided with rigidity adjustable plate (12), and described rigidity adjustable plate (12) is fixed on the described fairlead (6) by positioning bolt (13).
CN2010201474750U 2010-03-31 2010-03-31 Suspended frequency modulation mass damper Expired - Fee Related CN201660980U (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101806104A (en) * 2010-03-31 2010-08-18 东南大学 Suspended frequency modulation mass damper
CN102277827A (en) * 2011-04-27 2011-12-14 清华大学 Piezoelectric energy-capturing type tuning quality shock absorber
RU2475586C1 (en) * 2011-07-29 2013-02-20 Галина Алексеевна Наумова Design of hydrodynamic damper of bridge span vibrations

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101806104A (en) * 2010-03-31 2010-08-18 东南大学 Suspended frequency modulation mass damper
CN102277827A (en) * 2011-04-27 2011-12-14 清华大学 Piezoelectric energy-capturing type tuning quality shock absorber
CN102277827B (en) * 2011-04-27 2014-03-05 清华大学 Piezoelectric energy-capturing type tuning quality shock absorber
RU2475586C1 (en) * 2011-07-29 2013-02-20 Галина Алексеевна Наумова Design of hydrodynamic damper of bridge span vibrations

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101201

Termination date: 20130331