A bridge model wind tunnel force measurement device that realizes different combinations of wind deflection and wind attack angle
A technology of bridge model and windage angle, which is applied in the direction of measuring device, machine/structural component test, aerodynamic test, etc. It can solve the problems of troublesome operation, complicated test device, time-consuming and laborious, etc., and achieve shortened test cycle and high efficiency. effect of change
Active Publication Date: 2019-11-05
DALIAN UNIV OF TECH
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Problems solved by technology
At present, the wind tunnel test force measuring devices and methods for different wind deflection angles and different wind attack angles are relatively simple for the bridge girder segment model separately, but it is more complicated to realize different combinations of them at the same time. Once combined, the operation is very troublesome, time-consuming and labor-intensive
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[0010] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.
[0011] Such as figure 1 As shown, the wind tunnel dynamometer test device consists of a bridge model 1, a dynamometer balance 2, a strut 3, a rotating drive device 4, a rotating shaft 5, a platform 6, a base 7, a wedge 8 and a G-shaped clamp 9. The bridge model 1 is fixed on the force-measuring balance 2 placed inside it, the top of the strut 3 supports the force-measuring balance 2, and the bottom end is fixed on the rotating shaft 5 of the rotating drive device 4, the axis of the strut 3 is in a plane with the force-measuring balance 2 Vertical, and concentric with the axis of the pole 3; the rotating shaft 5 drives the pole 3, the force measuring balance 2 and the bridge model 1 to rotate together under the drive of the driving device 4, changing the deflection angle between the axis of the bridge model 1 and the...
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A bridge model wind tunnel fore-measuring test apparatus facilitating combination of different wind deflection angles and wind attach angles belongs to the technical field of a force-measuring test apparatus for a bridge model in any wind field condition. A force-measuring balance is arranged inside a bridge model, and the bridge model is fixed to the force-measuring balance. The top end of a circular rod supports the force-measuring balance, and the axis of the rod is perpendicular to the plane of the force-measuring balance. The bottom end of the rod is fixedly connected to a rotating shaftof a rotation driving device, and the rod and the rotating shaft are concentric. The rotation driving device is fixed on a bearing stand. A wedge block is arranged between the bearing stand and a pedestal, and can be made to have different inclination angles. Correspondingly, the rotating shaft of the driving device, the rod, the force-measuring balance and the model incline along with the wedge block. A G clamp between the bearing stand and the pedestal provides a convenient, fast and effective clamping effect, so that all the parts form a rigid supporting system. The apparatus effectively facilitates working condition combination of different wind deflection angles and wind attach angles. Compared with conventional test methods, the apparatus enables the test period to be shortened and the test cost to be reduced.
Description
technical field [0001] The invention belongs to a wind tunnel dynamometer test device that can conveniently realize bridge girder segment models under different wind deflection angles and wind attack angles, and specifically relates to using a rotating drive device to drive the model to rotate to realize different wind deflections of the bridge model Angle, wedge blocks with different inclination angles are added between the cap and the base to realize different wind attack angles of the bridge model. Background technique [0002] The dynamometric method is an important test method for studying the static and dynamic effects of wind load on bridges. Traditional long-span bridge wind resistance studies generally believe that when the wind flow is perpendicular to the bridge span, the static wind load and buffeting response of the bridge are the largest, and the critical wind speed of flutter is the lowest. However, the research results of some long-span bridges (such as Akas...
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IPC IPC(8): G01M9/06
Inventor 许福友曾冬雷杨晶
Owner DALIAN UNIV OF TECH