CN102853989A - Swing aeroelastic model and shock-test wind tunnel test method thereby - Google Patents

Swing aeroelastic model and shock-test wind tunnel test method thereby Download PDF

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Publication number
CN102853989A
CN102853989A CN2012103279633A CN201210327963A CN102853989A CN 102853989 A CN102853989 A CN 102853989A CN 2012103279633 A CN2012103279633 A CN 2012103279633A CN 201210327963 A CN201210327963 A CN 201210327963A CN 102853989 A CN102853989 A CN 102853989A
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China
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vibration level
slideway
axis
spring
pendulum
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CN2012103279633A
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CN102853989B (en
Inventor
何山
武利会
杨国斌
郑金杯
刘高
张虎
刘宝强
樊友平
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Wuhan University WHU
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Wuhan University WHU
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The invention discloses a swing aeroelastic model and a shock-test wind tunnel test method thereby and belongs to the technical field of structural wind-resistant design and test for building engineering. The swing aeroelastic model comprises a high-rise building rigid model, a rigid support rod and a support. The high-rise building rigid model is disposed at the upper end of the rigid support rod which is disposed vertically and is located above the support. The swing aeroelastic model further comprises a torsional vibration layer, an X-axial vibration layer and a Y-axial vibration layer, which are horizontally disposed on the support. The rigid support rod is connected with and penetrates through the vibration layers. The shock-test wind tunnel test method by the swing aeroelastic model includes the steps of firstly, setting the swing aeroelastic model; secondly, respectively regulating rigidity of springs and mass of mass blocks in the torsional vibration layer, the X-axial vibration layer and the Y-axial vibration layer according to test requirements so as to meet the test requirements; and thirdly, setting the swing aeroelastic model meeting the test requirements in a wind field, and performing wind tunnel test. Axial vibrations are not coupled, and more accurate test results can be obtained.

Description

Pendulum-type gas bullet model and gas bullet model are surveyed shake wind tunnel test method
 
Technical field
The present invention relates to a kind of building engineering structure wind force proofing design experimental technique, specifically, particularly relate to a kind of pendulum-type gas bullet model and gas bullet model that carries out wind tunnel test and survey shake wind tunnel test method.
 
Background technology
In recent years, therefore very high to the requirement of its structures under wind design so that the wind vibration response of skyscraper is more and more significant along with the increase of building height and the utilization of light-weight high-strength material, must accurately hold its aeroelasticity effect.
Electric transmission pole tower is typical wind sensitive structure as a kind of skyscraper, and the accident of the broken string of falling the tower happens occasionally under wind action.And as the important carrier of electric power transfer, the security of electric transmission pole tower is the important leverage of China's sound and rapid economic growth, and therefore good wind force proofing design is extremely important to electric transmission pole tower mechanism.
Wind tunnel test is the important tests means of structure design of test quality, and present wind tunnel test method comprises rigid model dynamometer check and gas bullet model vibration measuring wind tunnel test.Gas bullet model comprises again pendulum-type gas bullet model and full gas bullet model, and wherein full gas bullet model takes time and effort because designing and making is very complicated, should use very complicatedly, uses few; And pendulum-type gas bullet model is at present a kind of widely used gas bullet model setting and method for making because making is relatively simple.Yet existing pendulum-type gas bullet model with structure X axis, Y-axis and reverse to vibration all adopt the same layer spring to control because the discontinuity between the spring, its each axial vibration intercouples, accuracy that can't warranty test.
 
Summary of the invention
Based on this, the invention reside in and overcome in the prior art, each the axial vibration of pendulum-type gas bullet model intercouples, and defective that can't the warranty test accuracy the purpose of this invention is to provide a kind of pendulum-type gas bullet model, and this model can obtain more accurately test findings.Another object of the present invention provides a kind of gas bullet model and surveys shake wind tunnel test method, and the method is not coupled each axial vibration mutually, can obtain more accurately test findings.
For realizing the object of the invention, provide following technical scheme:
The invention provides a kind of pendulum-type gas bullet model, its technical scheme is as follows: this pendulum-type gas bullet model comprises skyscraper rigid model, rigidity pole, support; Described skyscraper rigid model is installed on the rigidity pole upper end of vertical setting, and is positioned at the support top; Also comprise and be horizontally placed on reversing to vibration level, X axis vibration level and Y-axis vibration level on the support; Described reversing to vibration level comprises the first spring and link, and described the first spring is two, be arranged in parallel; Described link is the square box that diagonal line is connected by rigid rod, described link connects respectively two the first springs by cornerwise two summits of square box, described the first mass is two, be individually fixed on all the other two summits of square box, described rigidity pole is connected in two diagonal line point of crossing that rigid rod connects in the square box; Described X axis vibration level comprises the second spring that arranges along X-direction, and its two ends along X axis all are fixed on the support, and the middle part connects rigidity pole; Described Y-axis vibration level comprises the 3rd spring that arranges along Y direction, and its two ends along Y-axis all are fixed on the support, and the middle part connects rigidity pole.
When using this pendulum-type gas bullet model to test, since reverse to vibration level control reverse to vibration, the vibration of X axis vibration level control X axis, the vibration of Y-axis vibration level control Y-axis is between each vibration level and non-interference, therefore, its X axis, Y-axis and reverse to vibration do not intercouple, and reverse to vibration controlled by link, only reversing to vibration, do not produce the vibration of X axis or Y-axis, can obtain accurately test findings.
The below describes further technical scheme:
In certain embodiments, described X axis vibration level also comprises slideway one; Described the second spring is two, be arranged in parallel at surface level; Described slideway one connects two the second springs, and vertical with the second spring; Described rigidity pole is passed slideway one, and is slidingly matched with slideway one; Described Y-axis vibration level also comprises slideway two; Described the 3rd spring is two, be arranged in parallel at surface level; Described slideway two connects two article of the 3rd spring, and vertical with the 3rd spring; Described rigidity pole is passed slideway two, and is slidingly matched with slideway two.Make each vibration level can obtain continual and steady vibration simultaneously, rigidity pole is slided in slideway one, guarantee that the motion of its left and right directions is unrestricted, and rigidity pole is slided in slideway two, guarantee that the motion of its fore-and-aft direction is unrestricted.
In certain embodiments, described slideway one is two tracks that be arranged in parallel, and slideway two also is two tracks that be arranged in parallel.Simple in structure, rigidity pole is passed by in the middle of two tracks, and by two railway limits, it is only done with respect to track about or the slip of fore-and-aft direction.
In certain embodiments, also comprise the bearing one, bearing two and the bearing three that are set on the rigidity pole, described bearing one and bearing two are located at respectively in slideway one and the slideway two; Described bearing three is between skyscraper rigid model and support.This model is mounted to when carrying out wind tunnel test in the wind field, bearing three is installed between skyscraper rigid model and the support, namely wind field base plate place guarantees vibration damping, reduces the fricative power consumption between rigidity pole and the wind field base plate.Equally, to be used for guaranteeing that rigidity is propped up rod twisting unaffected and hinder to vibration for bearing one and bearing two.
In certain embodiments, comprise that also the second mass that is connected with slideway two and the 3rd mass that is connected with slideway three, described the second mass are positioned at outside the slideway two place perpendiculars, described the 3rd mass is positioned at outside the slideway three place perpendiculars.Quality by the quality of regulation piece designs the vibration of regulating X axis and Y-axis.
In certain embodiments, also comprise the oil damping device that is positioned at rigidity pole below, described rigidity pole lower end is stretched in the damping oil of this oil damping device.Thereby obtain suitable structural damping ratio.
In certain embodiments, described reversing to the distance between vibration level and X axis vibration level or the Y-axis vibration level greater than the distance between X axis vibration level and the Y-axis vibration level.During application, according to actual conditions, make as far as possible and reverse to vibration level away from X axis vibration level and Y-axis vibration level.Make construction torsion to moment of inertia and rigidity minimum on the impact of the transverse vibration of X-axis and Y-axis.
In certain embodiments, the described skyscraper rigid model rigid model that is electric transmission pole tower.Be used for carrying out the wind tunnel test of electric transmission pole tower.
The present invention also provides a kind of gas bullet model to survey shake wind tunnel test method, may further comprise the steps:
1) as the aforementioned pendulum-type gas bullet model is installed;
2) adjust respectively the rigidity of reversing each spring in vibration level, X axis vibration level and the Y-axis vibration level and the quality of mass according to testing requirements, make the vibration frequency of X axis vibration level and Y-axis vibration level satisfy test to the vibration requirement of X-axis and Y-axis, make the torsional inertia of reversing to vibration level also satisfy testing requirements; Make simultaneously the quality of whole model satisfy equally testing requirements;
3) the above-mentioned pendulum-type gas bullet model that satisfies testing requirements is put into wind field, carry out wind tunnel test.
The below describes the advantage of aforementioned techniques scheme:
Pendulum-type gas bullet model of the present invention, by with model X axis, Y-axis with reverse to the principle controlled respectively of vibration and realize, make between each vibration level and non-interference, avoided the deficiency of existing structure, guaranteed X axis, Y-axis and reverse to vibration do not intercouple, can more real reflect structure wind resistance effect, can obtain accurately test findings.And can design and control flexibly each vibration level, the more accurately rigidity of model configuration and quality by the rigidity of change spring and the quality of mass.Simultaneously can be by designing and producing different skyscraper rigid models, simulation is different builds, and remaining part is reusable, has advantages of that cost is low, easy to make.
Gas bullet model of the present invention is surveyed shake wind tunnel test method, with structure X axis, Y-axis and reverse to vibration adopt the spring control of different layers, each axial vibration is not coupled mutually, can more real reflect structure wind resistance effect, can obtain more accurately test findings.
 
Description of drawings
Fig. 1 is the described pendulum-type gas of embodiment of the invention bullet model structure schematic diagram;
Fig. 2 is reversing to the vibration level structural representation of the embodiment of the invention;
Fig. 3 is the X axis vibration level structural representation of the embodiment of the invention;
Fig. 4 is the Y-axis vibration level structural representation of the embodiment of the invention.
Description of reference numerals: 1. skyscraper rigid model; 2. rigidity pole; 3. support; 4. reverse to vibration level; 5. X axis vibration level; 6. Y-axis vibration level; 7. the first spring; 8. link; 9. the first mass; 10. the second spring; 11. the 3rd spring; 12. slideway one; 13. slideway two; 14. bearing one; 15. bearing two; 16. bearing three; 17. the second mass; 18. the 3rd mass.
 
Embodiment
The below is elaborated to embodiments of the invention:
As shown in Figure 1, a kind of pendulum-type gas bullet model comprises skyscraper rigid model 1, rigidity pole 2, support 3; Described skyscraper rigid model 1 is installed on rigidity pole 2 upper ends of vertical setting, and is positioned at support 3 tops; Also comprise and be horizontally placed on reversing to vibration level 4, X axis vibration level 5 and Y-axis vibration level 6 on the support 3; Described reversing to vibration level 4 comprises the first spring 7 and link 8, and described the first spring 7 is two, be arranged in parallel; Described link 8 is the square box that diagonal line is connected by rigid rod, described link 8 connects respectively two the first springs 7 by cornerwise two summits of square box, described the first mass 9 is two, be individually fixed on all the other two summits of square box, described rigidity pole 2 is connected in two diagonal line point of crossing that rigid rod connects in the square box; Described X axis vibration level 5 comprises the second spring 10 that arranges along X-direction, and its two ends along X axis all are fixed on the support 3, and the middle part connects rigidity pole 2; Described Y-axis vibration level 6 comprises the 3rd spring 11 that arranges along Y direction, and its two ends along Y-axis all are fixed on the support 3, and the middle part connects rigidity pole 2.
When using this pendulum-type gas bullet model to test, since reverse to vibration level 4 control reverse to vibration, the vibration of X axis vibration level 5 control X axis, the vibration of Y-axis vibration level 6 control Y-axis is between each vibration level and non-interference, therefore, its X axis, Y-axis and reverse to vibration do not intercouple, and reverse to vibration only be controlled to be by link 8 and reversing to vibration, do not produce the vibration of X axis or Y-axis, can obtain accurately test findings.
As shown in Figure 2, described reversing in vibration level 4, described the first spring 7 is two, be arranged in parallel; Described link 8 is the square box that diagonal line is connected by rigid rod, described link 8 connects respectively two the first springs 7 by cornerwise two summits of square box, described the first mass 9 is fixed on all the other two summits of square box, and described rigidity pole 2 is connected in two diagonal line point of crossing that rigid rod connects in the square box.Describedly reverse simple in structure, stable to vibration level 4, guarantee to reverse to vibration satisfy testing requirements.
As shown in Figure 3, described X axis vibration level 5 also comprises slideway 1; Described the second spring 10 is two, be arranged in parallel at surface level; Described slideway 1 connects two the second springs 10, and vertical with the second spring 10; Described rigidity pole 2 is passed slideway 1, and is slidingly matched with slideway 1; As shown in Figure 4, described Y-axis vibration level 6 also comprises slideway 2 13; Described the 3rd spring 11 is two, be arranged in parallel at surface level; Described slideway 2 13 connects two article of the 3rd spring 11, and vertical with the 3rd spring 11; Described rigidity pole 2 is passed slideway 2 13, and is slidingly matched with slideway 2 13.Make each vibration level can obtain continual and steady vibration simultaneously, rigidity pole 2 is slided in slideway 1, the motion that guarantees its left and right directions is unrestricted, and rigidity pole 2 is slided in slideway 2 13, guarantees that the motion of its fore-and-aft direction is unrestricted.
Described slideway 1 is two tracks that be arranged in parallel, and slideway 2 13 also is two tracks that be arranged in parallel.Simple in structure, rigidity pole 2 is passed by in the middle of two tracks, and by two railway limits, it is only done with respect to track about or the slip of front and back.
Also comprise the bearing 1, bearing 2 15 and the bearing 3 16 that are set on the rigidity pole 2, described bearing 1 and bearing 2 15 are located at respectively in slideway 1 and the slideway 2 13; Described bearing 3 16 is between skyscraper rigid model 1 and support 3.This model is mounted to when carrying out wind tunnel test in the wind field, bearing 3 16 is installed between skyscraper rigid model 1 and the support 3, namely wind field base plate place guarantees vibration damping, reduces the fricative power consumption between rigidity pole 2 and the wind field base plate.Equally, bearing 1 and bearing 2 15 reverse unaffected to vibration for assurance rigidity pole 2 and hinder.
Also comprise the second mass 17 that is connected with slideway 2 13 and the 3rd mass 18 that is connected with slideway three, described the second mass 17 is positioned at outside the slideway 2 13 place perpendiculars, and described the 3rd mass 18 is positioned at outside the slideway three place perpendiculars.Quality by the quality of regulation piece designs the vibration of regulating X axis and Y-axis.
Also comprise the oil damping device that is positioned at rigidity pole 2 belows, described rigidity pole 2 lower ends are stretched in the damping oil of this oil damping device.Thereby obtain suitable structural damping ratio.
Described reversing to the distance between vibration level 4 and X axis vibration level 5 or the Y-axis vibration level 6 greater than the distance between X axis vibration level 5 and the Y-axis vibration level 6.During application, according to actual conditions, make as far as possible and reverse to vibration level 4 away from X axis vibration level 5 and Y-axis vibration level 6.Make construction torsion to moment of inertia and rigidity minimum on the impact of the transverse vibration of X-axis and Y-axis.
Described skyscraper rigid model 1 is the rigid model of electric transmission pole tower.Be used for carrying out the wind tunnel test of electric transmission pole tower.When simulating different skyscrapers, each spring and mass are to change by simple connected mode, guarantee to simulate quality and the rigidity of different high building structures.
Adopt the pendulum-type gas bullet model of the present embodiment to carry out gas bullet model survey shake wind tunnel test method, may further comprise the steps:
1) according to above-mentioned model structure, that model buildings is good.
2) for reversing to vibration, reverse moment of inertia from model configuration to the quality of the rigidity of the first spring 7 of vibration level 4 and the first mass 9 and the rigidity of coming by setting; Vibration frequency (being seesawing on the horizontal direction) for X axis, the rigidity of the second spring 10 by X axis vibration level 5 is set and the quality of the second mass 17 are regulated, and rigidity pole 2 is passed slideway 2 13, and the motion of its left and right directions is unrestricted; Vibration frequency (being the side-to-side movement on the horizontal direction) for Y-axis, the rigidity of the 3rd spring 11 by Y-axis vibration level 6 is set and the quality of the 3rd mass 18 are regulated, and rigidity pole 2 is passed slideway three, and the motion of its fore-and-aft direction is unrestricted.
3) the above-mentioned pendulum-type gas bullet model that satisfies testing requirements is put into wind field, install support 3 tops and wind field base plate (namely simulating ground) fixing, make the electric transmission pole tower model of part be in wind field base plate top, accept the effect of high wind, support 3 and each vibration level are in the wind field floor below, wherein, described bearing 3 16 is between skyscraper rigid model 1 and support 3, be wind field base plate place, guarantee vibration damping, reduce the fricative power consumption between rigidity pole 2 and the wind field base plate.
4) begin to carry out wind tunnel test, collect test figure and study.
 
The above embodiment has only expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (9)

1. a pendulum-type gas bullet model comprises skyscraper rigid model, rigidity pole, support; Described skyscraper rigid model is installed on the rigidity pole upper end of vertical setting, and is positioned at the support top;
It is characterized in that, also comprise being horizontally placed on reversing to vibration level, X axis vibration level and Y-axis vibration level on the support; Described reversing to vibration level comprises the first spring and link, and described the first spring is two, be arranged in parallel; Described link is the square box that diagonal line is connected by rigid rod, described link connects respectively two the first springs by cornerwise two summits of square box, described the first mass is two, be individually fixed on all the other two summits of square box, described rigidity pole is connected in two diagonal line point of crossing that rigid rod connects in the square box; Described X axis vibration level comprises the second spring that arranges along X-direction, and its two ends along X axis all are fixed on the support, and the middle part connects rigidity pole; Described Y-axis vibration level comprises the 3rd spring that arranges along Y direction, and its two ends along Y-axis all are fixed on the support, and the middle part connects rigidity pole.
2. pendulum-type gas bullet model according to claim 1 is characterized in that, described X axis vibration level also comprises slideway one; Described the second spring is two, be arranged in parallel at surface level; Described slideway one connects two the second springs, and vertical with the second spring; Described rigidity pole is passed slideway one, and is slidingly matched with slideway one; Described Y-axis vibration level also comprises slideway two; Described the 3rd spring is two, be arranged in parallel at surface level; Described slideway two connects two article of the 3rd spring, and vertical with the 3rd spring; Described rigidity pole is passed slideway two, and is slidingly matched with slideway two.
3. pendulum-type gas bullet model according to claim 2 is characterized in that, described slideway one is two tracks that be arranged in parallel, and slideway two also is two tracks that be arranged in parallel.
4. pendulum-type gas bullet model according to claim 2 is characterized in that, also comprises the bearing one, bearing two and the bearing three that are set on the rigidity pole, and described bearing one and bearing two are located at respectively in slideway one and the slideway two; Described bearing three is between skyscraper rigid model and support.
5. pendulum-type gas bullet model according to claim 2, it is characterized in that, also comprise the second mass that is connected with slideway two and the 3rd mass that is connected with slideway three, described the second mass is positioned at outside the slideway two place perpendiculars, and described the 3rd mass is positioned at outside the slideway three place perpendiculars.
6. pendulum-type gas bullet model according to claim 1 is characterized in that, also comprises the oil damping device that is positioned at rigidity pole below, and described rigidity pole lower end is stretched in the damping oil of this oil damping device.
7. pendulum-type gas bullet model according to claim 1 is characterized in that, described reversing to the distance between vibration level and X axis vibration level or the Y-axis vibration level greater than the distance between X axis vibration level and the Y-axis vibration level.
8. pendulum-type gas bullet model according to claim 1 is characterized in that, described skyscraper rigid model is the rigid model of electric transmission pole tower.
9. a gas bullet model is surveyed shake wind tunnel test method, it is characterized in that may further comprise the steps:
1) installs such as each described pendulum-type gas bullet model of claim 1-8;
2) adjust respectively the rigidity of reversing each spring in vibration level, X axis vibration level and the Y-axis vibration level and the quality of mass according to testing requirements, make the vibration frequency of X axis vibration level and Y-axis vibration level satisfy test to the vibration requirement of X-axis and Y-axis, make the torsional inertia of reversing to vibration level also satisfy testing requirements; Make simultaneously the quality of whole model satisfy equally testing requirements;
3) the above-mentioned pendulum-type gas bullet model that satisfies testing requirements is put into wind field, carry out wind tunnel test.
CN201210327963.3A 2012-09-07 2012-09-07 Swing aeroelastic model and shock-test wind tunnel test method thereby Active CN102853989B (en)

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CN104122067A (en) * 2013-04-24 2014-10-29 成都飞机设计研究所 Bending-torsional stiffness uncoupled simulation mechanism for flutter wind tunnel test model
CN104596728A (en) * 2015-02-05 2015-05-06 重庆大学 Large gas chamber piston aeroelastic model design method based on coal gas internal pressure
CN105628334A (en) * 2016-03-25 2016-06-01 中南大学 Aeroelastic model-based synchronous pressure measurement and vibration measurement system and realization method
CN105738069A (en) * 2016-03-01 2016-07-06 陈增顺 Mixing wind tunnel test device for simultaneously carrying out aeroelastic test and pressure detection test
CN105890868A (en) * 2015-12-09 2016-08-24 哈尔滨工业大学 Adjustable kilometer-level super high-rise building aeroelectric model and manufacturing method thereof
CN106053011A (en) * 2016-08-05 2016-10-26 国网新疆电力公司电力科学研究院 Aeroelastic model, with rigid adjustable U-shaped spring leaves, of circular pipe transmission tower
CN106289711A (en) * 2016-08-05 2017-01-04 国网新疆电力公司电力科学研究院 A kind of force test in wind tunnel method being applicable to lattice round steel pipe power transmission tower
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CN106768788A (en) * 2016-12-28 2017-05-31 华南理工大学 A kind of aeroelasticity experimental system
CN107894316A (en) * 2017-11-10 2018-04-10 重庆交通大学 With gas bullet-pressure measurement New Wind Tunnel experimental rig of pacing inertia force

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CN104122067A (en) * 2013-04-24 2014-10-29 成都飞机设计研究所 Bending-torsional stiffness uncoupled simulation mechanism for flutter wind tunnel test model
CN104596728A (en) * 2015-02-05 2015-05-06 重庆大学 Large gas chamber piston aeroelastic model design method based on coal gas internal pressure
CN104596728B (en) * 2015-02-05 2017-03-08 重庆大学 A kind of large-scale gas chamber piston air spring pole method for designing based on coal gas internal pressure
CN106706259A (en) * 2015-11-16 2017-05-24 王磊 Three-way forced vibration wind tunnel test device and manufacturing process thereof
CN105890868A (en) * 2015-12-09 2016-08-24 哈尔滨工业大学 Adjustable kilometer-level super high-rise building aeroelectric model and manufacturing method thereof
CN105890868B (en) * 2015-12-09 2018-10-02 哈尔滨工业大学 A kind of adjustable km grade high-rise building air spring pole and production method
CN105738069A (en) * 2016-03-01 2016-07-06 陈增顺 Mixing wind tunnel test device for simultaneously carrying out aeroelastic test and pressure detection test
CN105738069B (en) * 2016-03-01 2018-01-16 陈增顺 Aeroelastic test and the mixing flow tunnel testing device of manometric test can be carried out simultaneously
CN105628334A (en) * 2016-03-25 2016-06-01 中南大学 Aeroelastic model-based synchronous pressure measurement and vibration measurement system and realization method
CN106053011A (en) * 2016-08-05 2016-10-26 国网新疆电力公司电力科学研究院 Aeroelastic model, with rigid adjustable U-shaped spring leaves, of circular pipe transmission tower
CN106289711A (en) * 2016-08-05 2017-01-04 国网新疆电力公司电力科学研究院 A kind of force test in wind tunnel method being applicable to lattice round steel pipe power transmission tower
CN106289711B (en) * 2016-08-05 2018-06-12 国网新疆电力公司电力科学研究院 A kind of force test in wind tunnel method suitable for lattice round steel pipe power transmission tower
CN106768788A (en) * 2016-12-28 2017-05-31 华南理工大学 A kind of aeroelasticity experimental system
CN107894316A (en) * 2017-11-10 2018-04-10 重庆交通大学 With gas bullet-pressure measurement New Wind Tunnel experimental rig of pacing inertia force
CN107894316B (en) * 2017-11-10 2019-11-05 重庆大学 New Wind Tunnel experimental rig is pressed in gas bullet-survey with pacing inertia force

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