CN105402300A - Frequency-adjustable arm beam type dynamic vibration absorber based on piezoelectric shunt circuit - Google Patents
Frequency-adjustable arm beam type dynamic vibration absorber based on piezoelectric shunt circuit Download PDFInfo
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- CN105402300A CN105402300A CN201510822142.0A CN201510822142A CN105402300A CN 105402300 A CN105402300 A CN 105402300A CN 201510822142 A CN201510822142 A CN 201510822142A CN 105402300 A CN105402300 A CN 105402300A
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- Prior art keywords
- vibration absorber
- frequency
- piezoelectric
- dynamic vibration
- shunt circuit
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/08—Inertia
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/04—Frequency effects
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention provides a frequency-adjustable arm beam type dynamic vibration absorber based on a piezoelectric shunt circuit. The structure is composed of the dynamic vibration absorber and the piezoelectric shunt circuit; and the dynamic vibration absorber comprises a base, a cantilever beam and a mass block; the lower end of the base is fixed to a vibration absorption object, the upper end of the base and one end of the cantilever beam are fixed, and the mass block and the other end of the cantilever beam are fixed. The piezoelectric shunt circuit comprises a piezoelectric ceramic piece and a negative capacitor, the piezoelectric ceramic piece is pasted to the surface of the cantilever beam, and the positive pole and the negative pole of the cantilever beam are connected with the two ends of the negative capacitor. According to the frequency-adjustable arm beam type dynamic vibration absorber, the rigidity of the cantilever beam can be adjusted by adjusting the negative capacitance value of the shunt circuit, and the frequency of the dynamic vibration absorber is adjusted. Compared with an electromagnetic type and mechanical adjustable vibration absorber, the frequency-adjustable arm beam type power bump leveler is simple in structure, stable in work, convenient and rapid in frequency adjusting and rapid.
Description
Technical field
The invention belongs to mechanical vibration antivibration area, what be specifically related to is a kind of frequency-adjustable arm beam-type dynamic vibration absorber based on piezoelectric shunt circuit.
Background technique
Mechanical vibration problem is a kind of common phenomenon in engineering field.It not only can cause the fatigue damage of structure, also can reduce the precision of surveying instrument, and the noise that structural vibration simultaneously produces also can affect the normal work even health risk of related personnel.How effectively suppressing harmful vibration, is mechanical engineering, Aero-Space, problem that traffic and transport field is deeply concerned for a long time.
Because dynamic vibration absorber structure is simple, easy to implement, effectively blanketing frequency can change less vibration equipment, therefore be widely applied, become one of important means controlling vibration at present.Dynamic vibration absorber generally can be divided into passive type and the large class of semi-active type two.Wherein passive type dynamic vibration absorber can only be used for the vibration controlling specific a certain frequency range.When external excitation frequency or Boundary Conditions in Structures change, passive type dynamic vibration absorber will lose efficacy.In order to widen the control frequency scope of dynamic vibration absorber, can by regulating rigidity or the quality of bump leveller, the natural frequency of bump leveller can be changed with the change of external condition, and the dynamic vibration absorber of this frequency-adjustable is called as semi active vibration absorber.
Patent CN203641391U describes a kind of beam type semi active vibration absorber of frequency-adjustable, and quality of regulation block position on a cantilever beam, realizes the adjustment of bump leveller frequency manually.Owing to adopting manual mode, not too convenient in using so actual.
Patent CN203670596U describes a kind of dynamic vibration absorber being changed the freely-supported beam type frequency-adjustable of mass block position by stepper motor.Patent CN102116357A describes a kind of electrodynamic type beam type semi active vibration absorber, utilizes linear electric motor in conjunction with driving gear and rack drives mass block, thus regulates bump leveller frequency.This kind of semi active vibration absorber needs mechanical actuation device, structure relative complex.
Patent CN103615487A individually discloses a kind of electromagnetic type cantilever type semi-active vibration absorber, by regulating input current to change ELECTROMAGNETIC STIFFNESS, thus realizes the change of bump leveller frequency.But there is electromagnetic leakage phenomenon in this bump leveller.
Need mechanical actuation device, complex structure for above-mentioned semi active vibration absorber, there is the shortcomings such as electromagnetic leakage phenomenon, the invention provides that a kind of structure is simple, frequency adjustment cantilever beam type vibration absorber easily.
Summary of the invention
The object of the invention is to provide the adjustable arm beam-type dynamic vibration absorber that a kind of structure is simple, frequency adjustment adopts piezoelectric shunt circuit easily.
In order to achieve the above object, the present invention adopts following technological scheme: a kind of frequency-adjustable arm beam-type dynamic vibration absorber based on piezoelectric shunt circuit, be made up of dynamic vibration absorber and piezoelectric shunt circuit two-part, described dynamic vibration absorber comprises base, overhang, mass block; Absorbing object is fixed in the lower end of base, and base upper end and overhang one end are fixed, and mass block and the overhang the other end are fixed; Described piezoelectric shunt circuit comprises piezoelectric ceramic and negative capacitance, piezoelectric ceramic is pasted onto overhang surface, and piezoelectric ceramic positive and negative electrode connects formation loop, negative capacitance two ends.The effect of negative capacitance regulates piezoelectric ceramic surface charge absolute value, thus regulate the absolute value of voltage at piezoelectric ceramic two ends, due to inverse piezoelectric effect, the voltage change at piezoelectric ceramic two ends causes overhang rigidity to change, and realizes the adjustment of bump leveller frequency.
Overhang of the present invention is fixed by welding or screw and base and mass block.
The cross section of overhang of the present invention is rectangular.
The shape of piezoelectric ceramic of the present invention is cuboid.
Piezoelectric ceramic Pasting of the present invention is surperficial on a cantilever beam, and also Pasting is at overhang lower surface.
Piezoelectric ceramic of the present invention can be monolithic piezoelectric material, and also can be that the above piezoelectric material of two panels is stacked forms.
In piezoelectric shunt circuit of the present invention, negative electricity capacitance can regulate.
Advantage of the present invention is: structure of the present invention is simple, easy accessibility.Because the present invention does not need how mechanical transmission, only need by regulating negative electricity capacitance in branch circuit can regulate the natural frequency of bump leveller, so the present invention responds fast, reliability is high.
Accompanying drawing explanation
Fig. 1 model schematic of the present invention.
Wherein, 1-base, 2-overhang, 3-mass block, 4-piezoelectric ceramic, 5-negative capacitance.
Embodiment
Below in conjunction with accompanying drawing citing, more detailed description is done to the present invention:
Composition graphs 1, the present invention includes base 1, overhang 2, mass block 3, piezoelectric ceramic 4, negative capacitance 5.Wherein overhang 2 and mass block 3 form a cantilever structure, and piezoelectric ceramic 4 is pasted onto overhang 2 surface, and piezoelectric ceramic 4 positive and negative electrode connects negative capacitance 5 two ends composition piezoelectric shunt circuit.As shown in Figure 1.The realization of negative capacitance can see document (HorowitzP, HillW.TheArtofElectronics.NewYork:CambridgeUniversityPre ss.1996).
As the preferred embodiment of the present invention, the width of described piezoelectric ceramic 4 is the 80%-95% of overhang 2 width, and the length of described piezoelectric ceramic 4 is the 40%-50% of overhang 2 length, and the thickness of described piezoelectric ceramic 4 is between 0.2mm-2mm.
Working principle of the present invention is as follows: the effect of negative capacitance 5 regulates piezoelectric ceramic 4 surface charge absolute value, thus regulate the absolute value of voltage at piezoelectric ceramic 4 two ends, due to inverse piezoelectric effect, the voltage change at piezoelectric ceramic 4 two ends causes overhang 2 rigidity to change, and realizes the adjustment of bump leveller frequency.
Described dynamic vibration absorber is fixed on absorbing object, and its circuit and machine dynamics model can be expressed as
(1)
(2)
In formula:
m,
cwith
k represent equivalent mass, equivalent damping and the equivalent stiffness of cantilever structure (comprising overhang 2, the mass block 3 of having pasted piezoelectric ceramic 4) respectively.
coup represent the dynamo-electric coupling parameter of piezoelectric ceramic 4.
vfor the voltage at the two ends of piezoelectric ceramic 4.
qfor the surface charge of piezoelectric ceramic 4.
f for being delivered to the active force of bump leveller after absorbing vibrating objects.
c p for the electric capacity of piezoelectric ceramic 4.
By document (MaoQ, PietzkoS.ControlofNoiseandStructuralVibration.London:Spr inger.2013) known, when piezoelectric ceramic 4 positive and negative electrode connects negative capacitance 5 two ends composition piezoelectric shunt circuit, the voltage at piezoelectric ceramic 4 two ends can be expressed as
(3)
In formula:
cfor negative capacitance 5 absolute value in branch circuit.
Passing through type (2) can obtain the electric charge of the piezoelectric ceramic 4 caused due to structural vibration
q, wushu (3) substitutes into formula (2) and can obtain
(4)
Obviously,
;
(5)
In formula:
for external excitation frequency,
jfor imaginary number, namely
.
Wushu (5) substitutes into formula (4), can obtain after arrangement
（6）
Wushu (6) substitutes into formula (1), can obtain through arranging
(7)
The frequency-adjustable arm beam-type dynamic vibration absorber natural frequency based on piezoelectric shunt circuit of the present invention can be obtained from formula (7)
f res .
(8)
Can find from formula (8), by regulating the absolute value of negative capacitance 5, i.e. the natural frequency of adjustable bump leveller.
As the preferred embodiment of the present invention, the regulation range of described negative capacitance 5 absolute value is the 10%-95% of piezoelectric ceramic 2 capacitance.
Claims (7)
1. based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, be made up of dynamic vibration absorber and piezoelectric shunt circuit two-part, described dynamic vibration absorber comprises base (1), overhang (2), mass block (3); Absorbing object is fixed in the lower end of base (1), and base (1) upper end and overhang (2) one end are fixed, and mass block (3) and overhang (2) the other end are fixed; Described piezoelectric shunt circuit comprises piezoelectric ceramic (4) and negative capacitance (5), and piezoelectric ceramic (4) is pasted onto overhang (2) surface, piezoelectric ceramic (4) positive and negative electrode connects formation loop, negative capacitance (5) two ends.
2., as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, the cross section of overhang (2) is rectangular.
3., as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, the shape of piezoelectric ceramic (4) is cuboid.
4., as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, piezoelectric ceramic (4) is pasted onto overhang upper surface or is pasted onto overhang lower surface.
5. as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, piezoelectric ceramic (4) is monolithic piezoelectric material or the above piezoelectric material of two panels is stacked to be formed.
6., as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that, in piezoelectric shunt circuit, negative capacitance (5) value can regulate.
7., as claimed in claim 1 based on the frequency-adjustable arm beam-type dynamic vibration absorber of piezoelectric shunt circuit, it is characterized in that; Described overhang is fixed by welding or screw and base and mass block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510822142.0A CN105402300A (en) | 2015-11-24 | 2015-11-24 | Frequency-adjustable arm beam type dynamic vibration absorber based on piezoelectric shunt circuit |
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| CN201510822142.0A CN105402300A (en) | 2015-11-24 | 2015-11-24 | Frequency-adjustable arm beam type dynamic vibration absorber based on piezoelectric shunt circuit |
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| CN105402300A true CN105402300A (en) | 2016-03-16 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105912044A (en) * | 2016-06-06 | 2016-08-31 | 上海交通大学 | Frequency-resolution high-subdivision tunable dynamic vibration absorber |
| CN107013618A (en) * | 2017-05-19 | 2017-08-04 | 南京航空航天大学 | The powered shock absorption device that rigidity is tunable |
| CN107061605A (en) * | 2017-03-31 | 2017-08-18 | 南京航空航天大学 | The inertia forcer of piezoelectric stack actuator driving |
| CN107395064A (en) * | 2017-09-18 | 2017-11-24 | 苏州市职业大学 | A kind of energy recycle device based on piezoelectric cantilever |
| CN109324645A (en) * | 2018-11-21 | 2019-02-12 | 南京航空航天大学 | A kind of asymmetric semi-active control aystem and method |
| WO2019134600A1 (en) * | 2018-01-08 | 2019-07-11 | 深圳光启尖端技术有限责任公司 | Acoustic metamaterial |
| CN111237379A (en) * | 2020-01-13 | 2020-06-05 | 中国人民解放军海军工程大学 | Piezoelectric vibration impact isolation buffer |
| CN111779789A (en) * | 2020-06-05 | 2020-10-16 | 长江大学 | Piezoelectric energy-absorbing damper |
| CN112099544A (en) * | 2020-09-04 | 2020-12-18 | 上海交通大学 | Last-stage turbine blade vibration control system of steam turbine |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
Citations (5)
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|---|---|---|---|---|
| US20030209953A1 (en) * | 2002-05-08 | 2003-11-13 | Pohang University Of Science And Technology Foundation | Multi-mode vibration damping device and method using negative capacitance shunt circuits |
| JP2006275137A (en) * | 2005-03-29 | 2006-10-12 | Tokai Rubber Ind Ltd | Vibration restraining device |
| JP2009121520A (en) * | 2007-11-12 | 2009-06-04 | Univ Nagoya | Vibration suppression device |
| KR100971228B1 (en) * | 2009-08-14 | 2010-07-20 | 전남대학교산학협력단 | The shunt damper using ionic polymer metal composite |
| CN103615487A (en) * | 2013-12-05 | 2014-03-05 | 哈尔滨工程大学 | Cantilever beam type dynamic vibration absorber with adjustable rigidity |
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2015
- 2015-11-24 CN CN201510822142.0A patent/CN105402300A/en active Pending
Patent Citations (5)
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| US20030209953A1 (en) * | 2002-05-08 | 2003-11-13 | Pohang University Of Science And Technology Foundation | Multi-mode vibration damping device and method using negative capacitance shunt circuits |
| JP2006275137A (en) * | 2005-03-29 | 2006-10-12 | Tokai Rubber Ind Ltd | Vibration restraining device |
| JP2009121520A (en) * | 2007-11-12 | 2009-06-04 | Univ Nagoya | Vibration suppression device |
| KR100971228B1 (en) * | 2009-08-14 | 2010-07-20 | 전남대학교산학협력단 | The shunt damper using ionic polymer metal composite |
| CN103615487A (en) * | 2013-12-05 | 2014-03-05 | 哈尔滨工程大学 | Cantilever beam type dynamic vibration absorber with adjustable rigidity |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105912044A (en) * | 2016-06-06 | 2016-08-31 | 上海交通大学 | Frequency-resolution high-subdivision tunable dynamic vibration absorber |
| CN105912044B (en) * | 2016-06-06 | 2018-08-03 | 上海交通大学 | Frequency resolution is tunable dynamic vibration absorber |
| CN107061605A (en) * | 2017-03-31 | 2017-08-18 | 南京航空航天大学 | The inertia forcer of piezoelectric stack actuator driving |
| CN107061605B (en) * | 2017-03-31 | 2019-10-22 | 南京航空航天大学 | The inertia forcer of piezoelectric stack actuator driving |
| CN107013618A (en) * | 2017-05-19 | 2017-08-04 | 南京航空航天大学 | The powered shock absorption device that rigidity is tunable |
| CN107395064A (en) * | 2017-09-18 | 2017-11-24 | 苏州市职业大学 | A kind of energy recycle device based on piezoelectric cantilever |
| WO2019134600A1 (en) * | 2018-01-08 | 2019-07-11 | 深圳光启尖端技术有限责任公司 | Acoustic metamaterial |
| CN109324645A (en) * | 2018-11-21 | 2019-02-12 | 南京航空航天大学 | A kind of asymmetric semi-active control aystem and method |
| CN109324645B (en) * | 2018-11-21 | 2019-11-12 | 南京航空航天大学 | A kind of asymmetric semi-active control aystem and method |
| CN111237379A (en) * | 2020-01-13 | 2020-06-05 | 中国人民解放军海军工程大学 | Piezoelectric vibration impact isolation buffer |
| CN111779789A (en) * | 2020-06-05 | 2020-10-16 | 长江大学 | Piezoelectric energy-absorbing damper |
| CN111779789B (en) * | 2020-06-05 | 2022-02-18 | 长江大学 | Piezoelectric energy-absorbing damper |
| CN112099544A (en) * | 2020-09-04 | 2020-12-18 | 上海交通大学 | Last-stage turbine blade vibration control system of steam turbine |
| CN113531022A (en) * | 2021-07-26 | 2021-10-22 | 天津大学 | Active control local resonance metamaterial device for low-frequency vibration isolation |
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Application publication date: 20160316 |