CN105841914A - Tower device wind tunnel experiment device with tuned mass damper and experimental method of tower device wind tunnel experiment device - Google Patents
Tower device wind tunnel experiment device with tuned mass damper and experimental method of tower device wind tunnel experiment device Download PDFInfo
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- CN105841914A CN105841914A CN201610276491.1A CN201610276491A CN105841914A CN 105841914 A CN105841914 A CN 105841914A CN 201610276491 A CN201610276491 A CN 201610276491A CN 105841914 A CN105841914 A CN 105841914A
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- wind tunnel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
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Abstract
The invention discloses a tower device wind tunnel experiment device with a tuned mass damper and an experimental method of the tower device wind tunnel experiment device. The tower device wind tunnel experiment device with the tuned mass damper includes a tower device wind tunnel experiment device body. The body includes a group of round barrels with hollow inner parts, a core beam, a hexagonal prism and a hook. The round barrels are arranged in the axial direction in an overlapping manner. The center of the core beam is provided with a cylinder. The tuned mass damper is arranged above the body. A gap is left between the tuned mass damper and the body. The tuned mass damper includes a mass ring and a steel wire vibration isolator. The steel wire vibration isolator includes a steel wire and a clamp board. The steel wire is fixed on the clamp board in an inserting manner. The mass ring is in threaded connection with the clamp board of the steel wire vibration isolator. The invention has beneficial effects of reasonable structural design, low production cost, convenient operation and experiment and research progress acceleration.
Description
Technical field
The present invention relates to towering equipment wind tunnel experiment device technique field, be specifically related to a kind of band tuned mass damper
Towering equipment wind tunnel experiment device and experimental technique thereof.
Background technology
The tall and slender structure such as tower and chimney is the most universal in petrochemical industry, chemical industry, energy enterprise.Along with petrochemical industry and energy production
The fast development of industry, the equipment that the highest, flexibility is big is increasing, and wind fuel ratio causes the accident also frequency that tall and slender structure lost efficacy
Take place frequently life.China Lanzhou, Shandong, Fujian Deng Di petroleum chemical enterprise the most once occurred large-scale tower caused vibration by wind
Accident, tower top amplitude maximum close to 1.4 meters.The traditional measures of tall and slender structure vibration damping includes: increases wall thickness, install brokenly solar or lunar halo additional
Deng, but effectiveness in vibration suppression is not it is obvious that and put into bigger.At present, using tuned mass damper is to control structural vibration
The effective method of one of system, this damping technology is widely used in building and bridge, and obtains
Well effectiveness in vibration suppression, typical example is the vibration damping of television tower, studio tower etc..Accordingly, it is capable to no design is a kind of with tuning matter
The wind tunnel experiment device of the towering equipment of amount antivibrator is extremely urgent, only on the basis of experimental verification reliably, for promoting
Tuned mass damper application on towering equipment is significant.
Summary of the invention
In order to solve problems of the prior art, the invention provides simple in construction, highly reliable a kind of band is adjusted
The towering equipment flow tunnel testing device of humorous mass damper and experimental technique thereof.
Technical scheme is as follows:
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper, including the basis of towering equipment wind tunnel experiment device
Body, it is characterised in that described body includes internal one group of circular cylinder body, core beam, six prisms and hook for hollow, described one group
Circular cylinder body coordinates superposition to arrange vertically, and described core beam is made up of cylinder and one group of connecting rod being vertically set on cylinder,
Connecting rod is used for supporting circular cylinder body, and described six prisms are equipped with the top at cylinder, and described hook is set in qually spaced in six
The side of prism, described body be arranged over tuned mass damper, be provided with between described tuned mass damper and body
Gap, described tuned mass damper include quality loop and steel-wire isolator, described steel-wire isolator include steel wire rope and
Clamping plate, described steel wire rope is interspersed to be fixed on clamping plate, and described quality loop is by the clamping plate spiral shell of screw rod with described steel-wire isolator
Stricture of vagina connects, and described quality loop side wears outstanding rope with linking up with corresponding position, and described outstanding rope is articulated on hook.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described quality
Ring is provided with the through hole for installing outstanding rope and is provided with the installing hole fixed for screw rod connection.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described steel wire
Rope vibration isolator is spaced 120 ° along quality loop circumferencial direction and is uniformly distributed.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described connection
Spacing between bar is axial is corresponding with the height of circular cylinder body.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described quality
Gap between ring and body is 30-40mm.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described core beam
Connect and compose for adjacent orthogonal four cylinder beams.
The towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, it is characterised in that described hook
120 ° of sides being arranged on six prisms it are spaced between adjacent.
The center of described six prisms is provided with the circular port closed with cylinder matching size, and it is interior with six that circular port is inserted in cylinder termination
Prism connects.
The experimental technique of the towering equipment wind tunnel experiment device of described a kind of band tuned mass damper, its feature exists
In, comprise the steps:
1) test of the ontological property of towering equipment wind tunnel experiment device；Body is vertically placed on wind tunnel experiment platform, enters
Row wind tunnel experiment；Free Attenuation Method is utilized to obtain the free damping curve of body；By curve draws body natural frequency and
Damping ratio；
2) body of towering equipment wind tunnel experiment device is in the experiment of the acceleration of different wind speed next tops；At 10～18m/s wind
Speed is tested in interval, and in test, the interval of each air speed value is 0.4m/s, and each measurement time is 1min, and record data are also
Draw the relation curve of relative wind velocity and top acceleration；
3) the bodies top installation tuned mass damper at towering equipment wind tunnel experiment device carries out different wind speed next top
The experiment of acceleration；Each vibration isolator is carried out initial precompressed；Tuned mass damper is suspended in outstanding rope the top of body,
Use and step 2) identical method, measure and step 2) acceleration of same position under identical wind speed；Record data are also drawn
Relative wind velocity and the relation curve of top acceleration；
4) by Matlab software, measured data are processed, draw out response curve and form.
By using above-mentioned technology, compared with prior art, the invention have the advantages that: the present invention is by design contracting ratio
Model, it is possible to obtain structure charming appearance and behaviour phenomenon accurately and various response, is provided with gap so that steel wire rope between quality loop and body
Motion more abundant, damping is obvious, improves the effect of vibration damping.Reasonable in design, production cost is low, operation side
Just, it is greatly accelerated test and research progress.
Accompanying drawing explanation
The structural representation of Fig. 1 present invention；
The structural representation of Fig. 2 core of the present invention beam；
The structural representation of Fig. 3 circular cylinder body of the present invention；
The structural representation of Fig. 4 tuned mass damper of the present invention；
Fig. 5 ontological property of the present invention test free damping curve chart；
Fig. 6 acceleration of the present invention-relative wind velocity curve chart；
In figure: 1, body, 2, core beam, 3, cylinder, 4, circular cylinder body, 5, six prisms, 6, hook, 7, outstanding rope, 8, quality loop, 9, spiral shell
Bar, 10, clamping plate, 11, steel wire rope.
Detailed description of the invention
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in
This:
As shown in figures 1 to 6, the towering equipment wind tunnel experiment device of a kind of band tuned mass damper, including body 1, core beam 2, circle
Post 3, circular cylinder body 4, six prism 5, hook 6, outstanding rope 7, quality loop 8, screw rod 9, clamping plate 10 and steel wire rope 11.Described body 1 wraps
Including circular cylinder body 4, core beam 2, six prism 5 and hook 6, core beam 2 connects and composes for adjacent orthogonal four cylinder beams, core beam
2 to be arranged on circular cylinder body 4 internal, is used for supporting fixing.Described core beam 2 is by cylinder 3 and be vertically set on cylinder 3 one group even
Extension bar is constituted, and connecting rod is used for supporting circular cylinder body 4, and cylinder 3 is arranged on the center of core beam 2 and is connected with core beam 2 fixing, circular
Cylinder 4 is equipped with multiple for hollow cylinder and its superposition vertically.Six prisms 5 are arranged on cylinder 3 top, bottom six prisms 5
Being provided with installing hole for connecting cylinder 3, six prism 5 sides etc. are at a distance of mounting hook 6, and the side of quality loop 8 is provided with for installing
The through hole of outstanding rope 7 and be provided with and connect fixing installing hole for screw rod 9, described hook 67 is connected with outstanding rope.Body 1 is arranged over
Tuned mass damper, described tuned mass damper includes quality loop 8 and steel-wire isolator, and steel-wire isolator includes steel
Cord 11 and clamping plate 10, steel-wire isolator produces the effect of damping and vibration damping by steel wire rope.Quality loop 8 is by being arranged on
Outstanding rope 7 thereon is connected with hook 6 suspention being arranged on six prisms 5.Quality loop 8 is by screw rod 9 and steel-wire isolator
Clamping plate 10 connect fixing.
Embodiment:
Use single flow opening low-speed wind tunnel device, power of fan is 50kW, whole wind tunnel device total length 18m, test section width and
Height is all 1.2m.Cylinder 3 height is 1030mm, a diameter of 30mm of cylinder 3；Circular cylinder body 4 quantity is 3, circular cylinder body 4 height
For 290mm, the inside and outside diameter of circular cylinder body 4 is respectively 241 and 250mm；The height of quality loop 8 is 95mm, and quality loop 8 is inside and outside directly
Footpath is respectively 240 and 250mm；Six prism 5 height are 120mm, and its inscribed circle diameter is 120mm, quality loop 8 and circular cylinder body 4
Between gap be 30mm.
The scale model of this towering equipment is vertically placed in wind tunnel device, from the side of this model, it is carried out wind-tunnel
Experiment, by install tuned damper additional be not added with fill tuned mass damper experiment carry out contrast experiment.Determine during on-test
The wind speed that justice resonant velocity is corresponding when being model Oscillation Amplitude maximum, the resonant velocity of this test is 13.7m/s.Next is considered
The interval that affects of wind fuel ratio is 0.7 ~ 1.3 times of resonant velocity, i.e. the amplitude of wind tunnel model in 10～18m/s wind speed interval
Relatively big, and the tuning quality damper vibration damping device tested only has effectiveness in vibration suppression to the wind fuel ratio in this interval, is
Governing factor.Therefore, in only identifying 10～18m/s wind speed interval, model is with or without the aerodynamic parameter of tuned mass damper, tests
In the interval of each air speed value be 0.4m/s, each measurement time is 1min.Measure the examination of tuning quality damper vibration damping performance
Test point two parts: the first step is the acceleration measuring the body 1 without tuned mass damper in different wind speed next tops, and draws
Relative wind velocity (each wind speed and the ratio of resonant velocity) and the relation curve of top acceleration.Second step for each steel wire rope every
Under the device that shakes initial precompressed premise, tuned mass damper is arranged on the top of body 1, and with the suspention of outstanding rope 7, measures and first
Walk the acceleration of identical wind speed drag same position.
Experimental procedure is as follows:
1) test of body 1 characteristic of towering equipment wind tunnel experiment device；Body 1 is vertically placed on wind tunnel experiment platform,
Carry out wind tunnel experiment；Free Attenuation Method is utilized to obtain the free damping curve of body 1；
2) body 1 of towering equipment wind tunnel experiment device is in the experiment of the acceleration of different wind speed next tops；At 10～18m/s wind
Speed is tested in interval, and in test, the interval of each air speed value is 0.4m/s, and each measurement time is 1min, and record data are also
Draw the relation curve of relative wind velocity and top acceleration；
3) tuned mass damper is installed at body 1 top of towering equipment wind tunnel experiment device and carries out different wind speed next top
The experiment of acceleration；Each vibration isolator is carried out initial precompressed；Tuned mass damper is suspended in outstanding rope the top of body,
Use and step 2) identical method, measure and step 2) acceleration of same position under identical wind speed；Record data are also drawn
Relative wind velocity and the relation curve of top acceleration；
4) by Matlab(mono-kind based on the advanced techniques of algorithm development, data visualization, data analysis and numerical computations
Calculate language and interactive environment.) measured data process by software, draw out response curve and form.
Before analysis, parameter relative wind velocity a: U/U is first definedcr, during wherein U is test, any acceleration is corresponding
Wind speed, UcrIt it is resonant velocity.Fig. 6 is acceleration-relative wind velocity curve in 10～18m/s wind speed regions, compares vibration damping in figure
The measured value under model difference wind speed front and back.Figure clearly demonstrates that tuned mass damper effectiveness in vibration suppression reason near resonance region
Think, along with the effectiveness in vibration suppression of off-resonance wind speed tuned mass damper declines rapidly, tuning quality resistance is set if irrational
Buddhist nun's device parameter, amplifies the situation of vibration in being likely to appear in certain interval.
The test model top acceleration maximum amplitude being not added with vibration absorber is A1, displacement maximum amplitude is D1, adds vibration damping
After device same position acceleration maximum amplitude be A2, displacement maximum amplitude be D2.Define two parameters: Acceleration Control rate=
(A1-A2)/A1, Bit andits control rate=(D1-D2)/D1.By calculating, install tuned mass damper additional when structure produces resonance
Effect is the most obvious, and Acceleration Control rate can reach 64.12%, and Bit andits control rate is 60.41%.
By installing tuned mass damper additional on the scale model of towering equipment, absorb vibration and punching that wind load causes
Hitting, in the range of resonant velocity, effectiveness in vibration suppression is best, reaches about 60%, off-resonance wind speed region, and effectiveness in vibration suppression declines rapidly,
Reasonable in design, production cost is low, easy to operate, is greatly accelerated test and research progress.
Within the simple change of those ordinary skill in the art and replacement are all protection scope of the present invention.
Claims (9)
1. a towering equipment wind tunnel experiment device for band tuned mass damper, including the basis of towering equipment wind tunnel experiment device
Body (1), it is characterised in that described body (1) includes internal for one group of circular cylinder body (4) of hollow, core beam (2), six prisms (5)
And hook (6), described one group of circular cylinder body (4) coordinates superposition to arrange vertically, and described core beam (2) by cylinder (3) and vertically sets
The one group of connecting rod put on cylinder (3) is constituted, and connecting rod is used for supporting circular cylinder body (4), and described six prisms (5) are equipped with
At the top of cylinder (3), described hook (6) is set in qually spaced in the side of six prisms (5), being arranged over of described body (1)
Tuned mass damper, is provided with gap between described tuned mass damper and body (1), described tuned mass damper includes
Quality loop (8) and steel-wire isolator, described steel-wire isolator includes steel wire rope (11) and clamping plate (10), described steel wire rope
(11) intert and be fixed on clamping plate (11), the described quality loop (8) clamping plate (10) by screw rod (9) and described steel-wire isolator
Threaded, described quality loop (8) side wears outstanding rope (7) with hook (6) corresponding position, and described outstanding rope (7) mounts
On hook (6).
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, described quality loop (8) is provided with the through hole for installing outstanding rope (7) and is provided with the installing hole fixed for screw rod (9) connection.
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, described steel-wire isolator is spaced 120 ° along quality loop (8) circumferencial direction and is uniformly distributed.
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, the quantity of described circular cylinder body (4) and size thereof are corresponding with the size of wind-tunnel.
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, the gap between described quality loop (8) and body (1) is 30-40mm.
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, described pitman shaft between spacing corresponding with the height of circular cylinder body (4).
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, it is spaced 120 ° of sides being arranged on six prisms (5) between described hook (6) is adjacent.
The towering equipment wind tunnel experiment device of a kind of band tuned mass damper the most according to claim 1, its feature exists
In, the center of described six prisms (5) is provided with the circular port closed with cylinder (3) matching size, and cylinder (3) termination is inserted in circular port
It is connected with six prisms (5).
9. according to the reality of the towering equipment wind tunnel experiment device of the arbitrary described a kind of band tuned mass damper of claim 1-8
Proved recipe method, it is characterised in that comprise the steps:
1) test of body (1) characteristic of towering equipment wind tunnel experiment device；Body (1) is vertically placed on wind tunnel experiment platform
On, carry out wind tunnel experiment；Free Attenuation Method is utilized to obtain the free damping curve of body (1)；
2) body (1) of towering equipment wind tunnel experiment device is in the experiment of the acceleration of different wind speed next tops；10～18m/s
Testing in wind speed interval, in test, the interval of each air speed value is 0.4m/s, and each measurement time is 1min；Record data
And draw the relation curve of relative wind velocity and top acceleration；
3) tuned mass damper is installed at body (1) top of towering equipment wind tunnel experiment device and carries out different wind speed next top
The experiment of acceleration；Each vibration isolator is carried out initial precompressed；Tuned mass damper is suspended in body with outstanding rope (7)
(1) top, uses and step 2) identical method, measure and step 2) acceleration of same position under identical wind speed；Record
Data also draw the relation curve of relative wind velocity and top acceleration；
4) by Matlab software, measured data are processed, draw out response curve and form.
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| CN201610276491.1A CN105841914B (en) | 2016-04-29 | 2016-04-29 | A kind of towering equipment wind tunnel experiment device and its experimental method with tuned mass damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779152A (en) * | 2020-07-27 | 2020-10-16 | 浙江工业大学 | TMD vibration damper for ultrahigh wind turbine stand column |
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