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Torsion and vertical bending vibration frequency ratio adjustable coupling free vibration wind tunnel test device

A technology of wind tunnel test and vibration frequency, applied in aerodynamic test, measurement device, test of machine/structural components, etc., can solve problems such as increased cost, overweight system, inconvenient production of wheel hub, etc., and achieve the effect of wide test range

Active Publication Date: 2020-06-05
DALIAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The problems include: the test work is cumbersome, the wheel hub with too large diameter is not convenient to manufacture, and it is easy to cause the system to be overweight and lose feasibility, and the production of multiple types of wheel hubs will also increase the cost

Method used

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  • Torsion and vertical bending vibration frequency ratio adjustable coupling free vibration wind tunnel test device

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Embodiment Construction

[0011] The specific implementation manner of the present invention will be described in detail below in combination with the technical scheme and accompanying drawings.

[0012] Such as figure 1 As shown, a coupled free vibration wind tunnel test device with adjustable frequency ratio of torsional and vertical bending vibrations, including a rigid test model 1, a light rigid rod 2, a light rigid circular hub 3, a thin rope 4, a linear tension Stretching spring 5, carbon fiber rope 6 and light weight small wheel hub 7. Rigidity test model 1 is consolidated with rigid rod 2 at both ends, and rigid rod 2 passes through the center of light rigid circular large hub 3 and light weight small hub 7 vertically and is fixed with them in turn, and the torsion center of rigid test model 1 is guaranteed The line is collinear with the axis of the rigid rod 2, the central line of the light rigid circular hub 3 and the lightweight rigid circular hub 7; the string 4 is wound in the groove of ...

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Abstract

The invention discloses a torsion and vertical bending vibration frequency ratio adjustable coupling free vibration wind tunnel test device, and belongs to the technical field of bridge wind tunnel test devices. The device comprises a rigidity test model, a light rigid rod, a light rigid round hub, a string, a linear extension spring, a carbon fiber rope and a light small hub. The torsional rigidity of the vibration system is adjusted by conveniently changing the diameter of the small hub, the diameter and the length of the carbon fiber rope and the like. The device is simple in structure andconvenient to install, previous tedious work is avoided, and various torsion and vertical bending vibration frequency ratio test working conditions can be achieved only through one large-diameter hub;the replacement time for replacing the large hub can be greatly saved, and the test working condition that the high torsion and vertical bending vibration frequency ratio is difficult to achieve through an existing method can be conveniently achieved.

Description

technical field [0001] The invention belongs to the technical field of bridge wind tunnel test devices, and relates to a coupled free vibration wind tunnel test device with adjustable torsional and vertical bending vibration frequency ratios, which can realize large amplitude of bridge rigid models and ensure linear vertical stiffness and torsional rigidity, and can easily adjust the frequency ratio of torsional and vertical bending vibrations for free vibration wind tunnel test devices, specifically related to vertical linear tension springs, fixed with the model at both ends of the light and rigid circular large hub, connected The system composed of high-strength thin ropes of springs and hubs, light and rigid small hubs and carbon fiber ropes converts the torsion and vertical bending large-amplitude coupling free vibration of the bridge model into the vertical free expansion and contraction of linear springs, using the linear tensile stiffness and The circular rigid hub rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/02G01M9/08
CPCG01M9/02G01M9/08
Inventor 许福友
Owner DALIAN UNIV OF TECH
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