CN104596725B - Half active analogue means of wind-tunnel harmonic wave wind field - Google Patents
Half active analogue means of wind-tunnel harmonic wave wind field Download PDFInfo
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- CN104596725B CN104596725B CN201510036566.4A CN201510036566A CN104596725B CN 104596725 B CN104596725 B CN 104596725B CN 201510036566 A CN201510036566 A CN 201510036566A CN 104596725 B CN104596725 B CN 104596725B
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Abstract
The invention provides a kind of half active analogue means of wind-tunnel harmonic wave wind field, belong to wind tunnel test harmonic wave simulation of wind method and device.It is characterized in that elastic restraint single-degree-of-freedom torsion grid is placed in into wind-tunnel, in certain wind speed interval, using pneumatic self excitation force, steady twisting vibration occurs for grid, the single excellent frequency of airstream vibration that vibration frequency is depended primarily on after elastic system fundamental frequency, grid is grid vibration frequency.Wind speed is higher, and grid amplitude is bigger, and harmonic wave size is also bigger therewith, is easy to adjust and measures.The invention has the advantages that the mode inputted with a kind of simple, low cost, without power, produces the harmonic wave air-flow of assigned frequency and yardstick in wind tunnel test.
Description
Technical field
The present invention relates to a kind of flow tunnel testing device for simulating harmonic wave wind field, and in particular to breaks to using resilient suspension bluff body
Face grid vibrational system produces stable twisting vibration to simulate the dress of the harmonic wave wind field of assigned frequency and yardstick under given conditions
Put.
Background technology
Wind tunnel test is one of main method of research structure wind resistance, and simulation of wind is the important of wind tunnel test
Part.General wind tunnel test passively can produce turbulent performance, advantage using fixed grid device anyhow
It is technology simply, it is convenient to realize, but the turbulent performance produced has after multi-frequency, and grid with distance increase, turbulent feature
Change is very big.Japanese Miyazaki University is built with the active wind-tunnel of 99 fans, it is possible to achieve the simulation of different frequency fluctuating wind field,
But cost is fairly expensive, it is not easy to promote.Italian scholar Cigada, Diana et al. develop active grid technology, Ke Yi
It is pneumatic it is middle control to be formed the undulating flow of single-frequency, the unit such as Tongji University of China, Hunan University also develops similar device, but
It is that package unit needs the drive devices such as motor.On the one hand, costly (more than ten to hundreds of thousands member)；On the other hand, shake
Dynamic frequency is also usually no more than 5Hz；Further, grid size width used is typically no more than 50cm, therefore the turbulent wind produced
Field eddy size scope is narrower.
The content of the invention
The technical problem to be solved in the present invention is, for wind tunnel test the need for there is provided the convenient simulation specific frequency of one kind
With the device of yardstick harmonic wave wind field.
To achieve the above object, the technical scheme is that vertical and lateral degrees of freedom will be constrained, and elastic restraint list
The bluff section grid that the free degree is reversed is horizontally placed on wind-tunnel, by adjusting spring rate, spring suspension centre spacing, vibrational system matter
The parameter such as amount, the quality moments of inertia, grid width, in certain wind speed is interval, using pneumatic self excitation force, makes grid occur steady reverse
Move back and forth, it is possible thereby to produce the harmonic wave wind field of designated frequency range and range scale.Because the harmonic wave frequency that the present apparatus is produced
Rate and yardstick can be adjusted by different parameters combination, and without other extrinsic motivateds (such as motor), be consequently belonging to one kind
Half active analogue means.
Half active analogue means of wind-tunnel harmonic wave wind field includes grille frame, grid, rolling bearing, spring and connecting rod.Lattice
Grid support is fixed on test chamber both sides, for stationary grizzly；No less than 3 grids of parallel arrangement, lattice between two grille frames
Grid two ends point midway is provided with bearing pin, is connected by rolling bearing with grille frame, grid energy and can only be around respective central rotation.
Grid positioned at top and bottom is connected by spring with the cross bar on grille frame, forms twisting vibration system.Between each grid
It is connected with each other by connecting rod, it is ensured that synchronous to reverse.
Grille frame uses groined type shape, and two montants are directly anchored on wind-tunnel ground, and two cross bars are respectively close
It is that pendulum spring is convenient, the cross bar length of grille frame exceedes grid width at upper end grid and lower end grid.Grille frame is adopted
Made of bar section of stainless steel or steel profile.
To ensure to be easy to produce to reverse pneumatic self excitation force, rigid grid preferably uses bluff body section, as a preferred embodiment, available
H types section, cross-sectional width 20cm to 100cm, H types edge of a wing height 5cm to 25cm.Grid can be made using aluminium or steel.
Grid spacing is no more than grid width.
To ensure that grid is rotated freely, rolling bearing is preferably set between rigid link and grid.
As a kind of half active analogue means of wind-tunnel harmonic wave wind field, the present invention simulates suitable for wind tunnel test and specifies frequency
The harmonic wave wind field of rate and yardstick, relative to existing passive simulation and measure is actively simulated, advantages of the present invention has：
1, relative to passive simulation technology, half active simulation of wind method of the invention is combined by adjusting parameter, can be with
The harmonic wave air-flow of assigned frequency and yardstick is produced in relative broad range, to determine aerodynamic admittance, research structure buffets characteristic；
2, relative to active analogue technique, half active simulation of wind method and technology of the invention is simple, without specially forcing
Vibrating device, cost is greatly reduced, and is conducive to promoting the use of.
3, relative to active analogue technique, half active simulation of wind method of the invention can achieve over 5Hz vibration
Frequency, i.e., can simulate high frequency wind field.In addition, realizing the simulation of different harmonic wave yardsticks by changing grid width.
Brief description of the drawings
Accompanying drawing is the active analogue means structural map of wind tunnel test harmonic wave wind field half described herein.
In figure：1 grille frame；2 grids；3 rolling bearings；4 springs；5 connecting rods.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with accompanying drawing and technical scheme.
As shown in drawings, the active analogue means of harmonic wave wind field half have two pack supports 1 and multiple grids 2 and a series of bearings 3,
Spring 4 and connecting rod 5 are constituted.Present apparatus traverse is in test chamber, and support 1 is connected firm with wind-tunnel ground.Grid 2 passes through axle
3 are held to be supported on support 1.3 groups of grids 2 are connected firmly by connecting rod 5, it is ensured that rotated together about bearing 3.By choosing appropriate grid
The 2 mass moments of inertia, the rigidity of spring 4 and suspension centre spacing, in certain wind speed range, the active analogue means downstream of harmonic wave wind field half can be produced
Raw specific frequency fluctuation wind field.Grid amplitude is related to wind speed, and harmonic wave yardstick dative grid width is related to amplitude.It therefore, it can
By the reasonable combination of the parameters such as grid size, the vibrational system quality moments of inertia, spring rate, spring suspension centre spacing, needed for realizing
The simulation of frequency and yardstick harmonic wave wind field.
Claims (10)
1. half active analogue means of a kind of wind-tunnel harmonic wave wind field, it is characterised in that the half active analogue means includes grid branch
Frame, grid, rolling bearing, spring and connecting rod；Grille frame is fixed on test chamber both sides, for stationary grizzly；Two grids
No less than 3 grids of parallel arrangement between support, the point midway at grid two ends is provided with bearing pin, passes through rolling bearing and grille frame
Connection, grid can only rotate around respective midpoint；Grid positioned at top and bottom is connected by the cross bar on spring and grille frame
Connect, form twisting vibration system；It is connected with each other between each grid by connecting rod, it is ensured that synchronous to reverse.
2. half active analogue means according to claim 1, it is characterised in that described grille frame uses groined type
Shape, two montants are directly anchored on wind-tunnel ground, and two cross bars are respectively close at upper end grid and lower end grid.
3. half active analogue means according to claim 1 or 2, it is characterised in that described grille frame cross tube is long
Degree exceedes grid width.
4. half active analogue means according to claim 1 or 2, it is characterised in that described grille frame is using stainless
Steel profile or steel profile make.
5. half active analogue means according to claim 3, it is characterised in that described grille frame uses stainless die
Material or steel profile make.
6. the half active analogue means according to claim 1,2 or 5, it is characterised in that described grid uses aluminium section bar
Splice H types section, cross-sectional width 20cm to 100cm, H types edge of a wing height 5cm to 25cm；Grid spacing is no more than grid width.
7. half active analogue means according to claim 3, it is characterised in that described grid splices H using aluminium section bar
Type section, cross-sectional width 20cm to 100cm, H types edge of a wing height 5cm to 25cm；Grid spacing is no more than grid width.
8. half active analogue means according to claim 4, it is characterised in that described grid splices H using aluminium section bar
Type section, cross-sectional width 20cm to 100cm, H types edge of a wing height 5cm to 25cm；Grid spacing is no more than grid width.
9. the half active analogue means according to claim 1,2,5,7 or 8, it is characterised in that described connecting rod and grid
Between rolling bearing is set.
10. half active analogue means according to claim 6, it is characterised in that set between described connecting rod and grid
Rolling bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036566.4A CN104596725B (en) | 2015-01-26 | 2015-01-26 | Half active analogue means of wind-tunnel harmonic wave wind field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510036566.4A CN104596725B (en) | 2015-01-26 | 2015-01-26 | Half active analogue means of wind-tunnel harmonic wave wind field |
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| Publication Number | Publication Date |
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| CN104596725A CN104596725A (en) | 2015-05-06 |
| CN104596725B true CN104596725B (en) | 2017-08-01 |
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| CN201510036566.4A Expired - Fee Related CN104596725B (en) | 2015-01-26 | 2015-01-26 | Half active analogue means of wind-tunnel harmonic wave wind field |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989931B (en) * | 2015-07-13 | 2017-04-05 | 广州广电计量检测股份有限公司 | Anemobiagraph fixture |
| CN105387991A (en) * | 2015-12-02 | 2016-03-09 | 同济大学 | Wind-tunnel turbulent flow field simulation method and device |
| CN105910793B (en) * | 2016-06-12 | 2019-01-22 | 哈尔滨工业大学深圳研究生院 | A kind of active oscillating grid enhancing atmospheric boundary layer wind tunnel turbulivity |
| CN110567670B (en) * | 2019-09-11 | 2021-08-13 | 交通运输部天津水运工程科学研究所 | Sudden gust response wind tunnel simulation device and test method for large port mechanical equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101419117A (en) * | 2008-11-28 | 2009-04-29 | 北京航空航天大学 | Aeroelastic flutter generating device |
| CN202735062U (en) * | 2012-09-07 | 2013-02-13 | 广东电网公司佛山供电局 | Pendulum type aeroelastic model |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09218127A (en) * | 1995-12-07 | 1997-08-19 | Mitsubishi Heavy Ind Ltd | Wind tunnel test device for wind direction fluctuation |
| JP3207736B2 (en) * | 1995-12-29 | 2001-09-10 | 三菱重工業株式会社 | Wind direction control device in wind tunnel |
| JP2001041846A (en) * | 1999-08-02 | 2001-02-16 | Nkk Corp | Method and device for supporting model for wind tunnel test |
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2015
- 2015-01-26 CN CN201510036566.4A patent/CN104596725B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101419117A (en) * | 2008-11-28 | 2009-04-29 | 北京航空航天大学 | Aeroelastic flutter generating device |
| CN202735062U (en) * | 2012-09-07 | 2013-02-13 | 广东电网公司佛山供电局 | Pendulum type aeroelastic model |
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