CN102879170A - Device for controlling state of model of wind tunnel of engineering structure - Google Patents
Device for controlling state of model of wind tunnel of engineering structure Download PDFInfo
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- CN102879170A CN102879170A CN2012103593283A CN201210359328A CN102879170A CN 102879170 A CN102879170 A CN 102879170A CN 2012103593283 A CN2012103593283 A CN 2012103593283A CN 201210359328 A CN201210359328 A CN 201210359328A CN 102879170 A CN102879170 A CN 102879170A
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Abstract
The invention discloses a device for controlling the state of a model of a wind tunnel of an engineering structure. The device supports and controls the tested state and the vibration of the tested model in the wind tunnel and mainly comprises a base and model supporting vertical seats, wherein the model supporting vertical seats are symmetrically arranged at two ends of the base; and each model supporting vertical seat is provided with a height adjusting mechanism and an angle adjusting mechanism. The device is simple and compact in structure, simply and conveniently realizes vertical vibration, torsional vibration and coupling movement, can simulate various vibrations including random vibration, is wide in displacement and frequency range and low in manufacturing cost, and is accurate and controllable.
Description
Technical field
The present invention relates to wind tunnel test equipment, be specifically related to engineering structure wind tunnel model behavior control device and make the field.
Background technology
The wind-induced vibration in the field such as bridge, wing, particularly flutter and buffeting are one of structural safety the biggest factors that threatens on bridge.In wind-induced vibration, flutter is the most dangerous a kind of vibration mode, chatter phenomenon is a kind of typical Results of Aeroelastic Instability phenomenon, all Results of Aeroelastic Instability phenomenons cause by acting on structural self excitation force that all therefore correctly describing and acting on structural self excitation force is that all aeroelasticities of research are prerequisite and the keys of asking phenomenon.Self excitation force refers to structural in being immersed in air-flow by himself motion and air-flow interaction and causes aerodynamic force.
Act on structural self excitation force in order to describe, scholars have proposed multiple parsing and empirical model, and wherein, aerodynamic derivative is the most appropriate optimum a kind of model.Aerodynamic derivative has played vital effect in Longspan Bridge flutter and buffeting analysis process.
Aerodynamic derivative normally obtains by model wind tunnel test, and the aerodynamic derivative method for testing and identifying can be divided into two large classes.One class is free vibration method; Another kind of is forced oscillation method.Compare with free vibration method, it is large that the identification of forced oscillation method aerodynamic derivative has the test signal signal to noise ratio (S/N ratio), and recognizer is simple, and calculated amount is little, and therefore aerodynamic derivative accuracy of identification advantages of higher, is used very early to some extent.
More typical forced vibration device has following several: one is the forced vibration device that Jensen in 1997 adopts the single-ended spindle section segment model of a kind of cantilevered fashion, but owing to adopt single-ended supporting, measuring accuracy is not high; Two is 2002, and Chen Zheng is cleer and peaceful in developing 4 outer suspension Segment Model forced vibration devices of a cover eastwards, and this device can make model do single-degree-of-freedom vertical motion or single-degree-of-freedom twisting vibration, but can not do Flexural-Torsional Coupling Vibration; The 3rd, the Three Degree Of Freedom large amplitude forced vibration device of Mitsui shipbuilding Co., Ltd., it is with five COMPONENT BALANCE dynamometry, can make Segment Model make level, vertical or reverse the single-degree-of-freedom simple harmonic oscillation, also can make Segment Model do vertical and reverse or level and the coupled vibrations that reverses, but large amplitude returns the increase nonlinear effect on the one hand, needs on the other hand force balance to have larger range, thereby reduces precision.Similarly device is a variety of in addition, no longer introduces here, and at present, the mechanism that this class device adopts mainly has: toggle, slider-crank mechanism, eccentric mechanism, cam mechanism, rack and pinion drive mechanism.These mechanisms and control mode have following shortcoming: (a) can not guarantee model by default frequency movement or can only realize simple harmonic oscillation, (b) vertical displacement of model and windup-degree out of true, and vertical amplitude and torsional amplitudes are less, (c) can not realize simultaneously vertical motion and twisting motion, can not realize inputting arbitrarily the motion of displacement, (d) noise is larger, and (e) device structure is complicated, huge heaviness, floor area is wide.
Summary of the invention
Shortcoming in view of prior art, the objective of the invention is to design a kind of novel engineering structure wind tunnel model behavior control device, make it to overcome the shortcoming of prior art, control the state of model by the control servomotor, when the same day, gentle model was not tested simultaneously, model bolster 140 can withdraw from wind-tunnel and sealing.
The objective of the invention is to realize by following means.
Engineering structure wind tunnel model behavior control device, support and be controlled at the tested state of the tested model in the wind-tunnel and the vibration (vibration of vertical direction of stack, twisting vibration, and coupled vibrations), mainly formed by base 600, the model supporting stand that is symmetricly set on the base two ends; Be provided with height adjustment mechanism and angle adjusting mechanism on the model supporting stand; The vertical stand of model supporting has stand 510, is vertically installed with slide rail 520 and 530 in the stand, and stand sliding panel 540 stands on the slide rail; Constituting of height adjustment mechanism: servomotor 210 is fixed in the stand 510, link to each other with screw mandrel 230 by shaft coupling 220, screw mandrel 230 passes the screw hole of stand sliding panel 540, one termination of screw mandrel connects with stand sliding panel 540 by screw mandrel flange 240, height adjustment mechanism realization stand sliding panel 540 moving up and down in the vertical direction; Constituting of angle adjusting mechanism: servomotor 110 is fixed on the stand sliding panel, and servomotor 110 output terminals link to each other the twisting motion driving-chain of formation model bolster by belt train 120 with model bolster 140 with reducing gear 130.
Adopt structure of the present invention, have the following advantages:
1) by setting program control servomotor, can make day gentle model according to default displacement (comprising vertical displacement and torsion angle displacement) and frequency (comprising vertical motion frequency and torsion frequency) motion, realized accurate motion.Simultaneously, can simulate various vibrations and comprise random oscilation.
The displacement that 2) can realize (comprising vertical displacement and torsion angle displacement) and frequency (comprising vertical motion frequency and torsion frequency) are all larger comparatively speaking, can satisfy testing requirements, and measuring accuracy is high.
3) can realize the coupled motions of vertical motion and twisting vibration.The present invention adopts two independently power sources: servomotor 110, servomotor 210.Vertical and twisting motion does not interfere with each other, and has realized coupled motions.
4) owing to adopted servomotor as power source, simultaneously, Timing Belt slows down, gear reduction, and the noise of lead screw transmission is very little, and during test, the noise of system is very little, and jamtosignal is lower than 5%.
5) after test stops, in order not affect other wind tunnel test, the model bolster can withdraw from wind-tunnel very easily, by seal box and sealing, eliminates external environment (comprising temperature, humidity, dust) to the impact of test unit.When the gentle model in sky is installed simultaneously, by regulating manual lead screw mechanism 620, can eliminate because the impact of the scale error of day gentle model on installing.
6) relatively by the device of link transmission, of the present invention simple and compact for structure, floor area is little.
7) outsourcing piece of the present invention's employing is more commonly used, such as, servomotor, shaft coupling, gear reducer, Timing Belt slow down.Pass through simultaneously structure optimization repeatedly, other design of part is simple and practical, and cost is lower, so the cost performance of this device is very high.
Description of drawings
Fig. 1 is the front view of engineering structure wind tunnel model behavior control device.
Fig. 2 is the vertical view of engineering structure wind tunnel model behavior control device.
Fig. 3 is the front view (right part) of engineering structure wind tunnel model behavior control device.
Fig. 4 is the vertical view (right part) of engineering structure wind tunnel model behavior control device.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As seen from Figure 1: 900 is wind-tunnel, two model bolsters of engineering structure wind tunnel model behavior control device stretch in the wind-tunnel, be fixedly installed tested model and balance on the model bolster, state and stressing conditions that engineering structure wind tunnel model behavior control device of the present invention is adjusted tested model and balance by vertical motion and the axial rotation of two model bolsters.
Can find out that in conjunction with Fig. 1 to Fig. 4 control device mainly is comprised of base 600, the model supporting stand that is symmetricly set on the base two ends.Because the symmetry of the model at two ends supporting stand, the narration that below relates to model supporting stand and its parts all launches the right model supporting base model supporting stand.
Be provided with height adjustment mechanism and angle adjusting mechanism on the model supporting stand.Model supporting stand has stand 510, is vertically installed with slide rail 520 and 530 in the stand, and stand sliding panel 540 stands on the slide rail.Described height adjustment mechanism and angle adjusting mechanism are to vertical motion, and the realization of twisting vibration and coupled vibrations is all finished by stand sliding panel 540.
Constituting of height adjustment mechanism: servomotor 210 is fixed in the stand 510, link to each other with screw mandrel 230 by shaft coupling 220, screw mandrel 230 passes the screw hole of stand sliding panel 540, one termination of screw mandrel connects with stand sliding panel 540 by screw mandrel flange 240, height adjustment mechanism is realized stand sliding panel 540 moving up and down in the vertical direction, controls the vertical motion state of model by control servomotor 210.
Constituting of angle adjusting mechanism: servomotor 110 is fixed on the stand sliding panel, and servomotor 110 output terminals link to each other the twisting motion driving-chain of formation model bolster by belt train 120 with model bolster 140 with reducing gear 130.Control servomotor 110 is controlled the horizontality (being the windup-degree of model, angular velocity, and angular acceleration) of model.
Be provided with a pair of horizontal guide rail on the described base 600, model supporting stand stands on the horizontal guide rail 610, movable wire linkage 620 passes the screw hole component model supporting stand horizontal shift governor motion in the stand 510 on the other hand, when model is not tested, in order not affect other wind tunnel test, model can withdraw from wind-tunnel very easily, the same day gentle model scale error when very larger, the adjusting by manual lead screw mechanism 620 gets final product regulating error.
Embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood to that the protection domain of inventing is not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, all be considered to belong to the protection domain of claim of the present invention.
Claims (2)
1. engineering structure wind tunnel model behavior control device supports and is controlled at the tested state of the tested model in the wind-tunnel and the vibration of stack, it is characterized in that, mainly is comprised of base (600), the model supporting stand that is symmetricly set on the base two ends; Be provided with height adjustment mechanism and angle adjusting mechanism on the model supporting stand; Model supporting stand has stand (510), is vertically installed with two slide rails (520) and 530 in the stand, and stand sliding panel (540) stands on the slide rail; Constituting of height adjustment mechanism: servomotor (210) is fixed in the stand (510), link to each other with screw mandrel (230) by shaft coupling (220), screw mandrel (230) passes the screw hole of stand sliding panel, one termination of screw mandrel connects with the stand sliding panel by screw mandrel flange (240), height adjustment mechanism realization stand sliding panel moving up and down in the vertical direction; Constituting of angle adjusting mechanism: servomotor (110) is fixed on the stand sliding panel (540), servomotor (110) output terminal links to each other the twisting motion driving-chain of formation model bolster by belt train (120) with reducing gear (130) with model bolster (140).
2. described engineering structure wind tunnel model behavior control device according to claim 1, it is characterized in that: described base is provided with a pair of horizontal guide rail on (600), model supporting stand stands on the horizontal guide rail, and the movable wire linkage passes the screw hole component model supporting stand horizontal shift governor motion in the stand (510) on the other hand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210359328.3A CN102879170B (en) | 2012-09-25 | 2012-09-25 | Engineering structure wind tunnel model behavior control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210359328.3A CN102879170B (en) | 2012-09-25 | 2012-09-25 | Engineering structure wind tunnel model behavior control device |
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| CN102879170A true CN102879170A (en) | 2013-01-16 |
| CN102879170B CN102879170B (en) | 2015-08-19 |
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| CN201210359328.3A Expired - Fee Related CN102879170B (en) | 2012-09-25 | 2012-09-25 | Engineering structure wind tunnel model behavior control device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487231A (en) * | 2013-09-24 | 2014-01-01 | 大连理工大学 | Active vibration abatement device of supporting rod type wind tunnel model |
| CN106706259A (en) * | 2015-11-16 | 2017-05-24 | 王磊 | Three-way forced vibration wind tunnel test device and manufacturing process thereof |
| CN108562418A (en) * | 2018-05-14 | 2018-09-21 | 同济大学 | Experimental rig for Segment Model Motion loading |
| CN114878124A (en) * | 2022-07-08 | 2022-08-09 | 西南交通大学 | Vibration test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH055672A (en) * | 1991-06-27 | 1993-01-14 | Mitsubishi Heavy Ind Ltd | Wind tunnel |
| JPH09203685A (en) * | 1996-01-26 | 1997-08-05 | Nkk Corp | Model support method in wind tunnel test and apparatus for the method |
| JP2000131186A (en) * | 1998-10-23 | 2000-05-12 | Fuji Heavy Ind Ltd | Wind tunnel simulation device and method for designing airframe using the same |
| JP2001041846A (en) * | 1999-08-02 | 2001-02-16 | Nkk Corp | Method and device for supporting model for wind tunnel test |
| WO2010050121A1 (en) * | 2008-10-29 | 2010-05-06 | ナブテスコ株式会社 | Damper testing device |
| CN102146980A (en) * | 2011-01-07 | 2011-08-10 | 湖南大学 | Rigid sectional mold damp continuous regulating device for wind-tunnel test |
| CN102162768A (en) * | 2010-12-29 | 2011-08-24 | 中国计量学院 | Device for detecting performance of static pressure air flotation guide rail and using method of device |
-
2012
- 2012-09-25 CN CN201210359328.3A patent/CN102879170B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055672A (en) * | 1991-06-27 | 1993-01-14 | Mitsubishi Heavy Ind Ltd | Wind tunnel |
| JPH09203685A (en) * | 1996-01-26 | 1997-08-05 | Nkk Corp | Model support method in wind tunnel test and apparatus for the method |
| JP2000131186A (en) * | 1998-10-23 | 2000-05-12 | Fuji Heavy Ind Ltd | Wind tunnel simulation device and method for designing airframe using the same |
| JP2001041846A (en) * | 1999-08-02 | 2001-02-16 | Nkk Corp | Method and device for supporting model for wind tunnel test |
| WO2010050121A1 (en) * | 2008-10-29 | 2010-05-06 | ナブテスコ株式会社 | Damper testing device |
| CN102162768A (en) * | 2010-12-29 | 2011-08-24 | 中国计量学院 | Device for detecting performance of static pressure air flotation guide rail and using method of device |
| CN102146980A (en) * | 2011-01-07 | 2011-08-10 | 湖南大学 | Rigid sectional mold damp continuous regulating device for wind-tunnel test |
Non-Patent Citations (1)
| Title |
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| 孙延国 等: "基于风洞试验的大跨度悬索桥涡振性能研究及评价", 《实验流体力学》, vol. 26, no. 4, 31 August 2012 (2012-08-31), pages 27 - 32 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487231A (en) * | 2013-09-24 | 2014-01-01 | 大连理工大学 | Active vibration abatement device of supporting rod type wind tunnel model |
| CN106706259A (en) * | 2015-11-16 | 2017-05-24 | 王磊 | Three-way forced vibration wind tunnel test device and manufacturing process thereof |
| CN108562418A (en) * | 2018-05-14 | 2018-09-21 | 同济大学 | Experimental rig for Segment Model Motion loading |
| CN114878124A (en) * | 2022-07-08 | 2022-08-09 | 西南交通大学 | Vibration test system |
| CN114878124B (en) * | 2022-07-08 | 2022-10-14 | 西南交通大学 | Vibration test system |
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