CN215640035U - Bridge oblique wind test vibration device - Google Patents
Bridge oblique wind test vibration device Download PDFInfo
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- CN215640035U CN215640035U CN202121988874.4U CN202121988874U CN215640035U CN 215640035 U CN215640035 U CN 215640035U CN 202121988874 U CN202121988874 U CN 202121988874U CN 215640035 U CN215640035 U CN 215640035U
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Abstract
The utility model belongs to the technical field of bridge wind tunnel tests and discloses a bridge oblique wind test vibration device which comprises a segment model and a spring bracket, wherein the segment model and the spring bracket are arranged in a wind tunnel; the two sides of the segment model are respectively connected with a suspension arm and an abnormal-shaped segment, and the segment model is connected with the abnormal-shaped segment through the suspension arm; the segment model and the two special-shaped segments form an inclined segment rigid model; the tail end of the spring support is provided with a magnetic gauge stand, and the spring support is adsorbed on the top plate and the bottom plate of the wind tunnel through the magnetic gauge stand. The bridge experiment model is fixed through the magnetic gauge stand, so that the operation that the traditional experiment device needs to drill holes on a wind tunnel top plate and a wind tunnel bottom plate is avoided, and the position of the magnetic gauge stand is very easy to manually adjust, so that the position of the magnetic gauge stand can be conveniently changed to realize the continuous adjustment of the wind deflection angle, and the bridge experiment model can adapt to experiment models with different sizes; the special-shaped section fixed on the suspension arm simulates the pneumatic appearance of the inclined section under different wind deflection angles, so that the flow interference generated by end vortex is effectively avoided.
Description
Technical Field
The utility model belongs to the technical field of bridge wind tunnel tests, and relates to a bridge oblique wind test vibration device.
Background
In actual bridge engineering, natural wind often forms a certain included angle with the normal direction of a bridge member, bridge wind-induced vibration response under the action of different wind deflection angles needs to be tested, and a free vibration test of a spring suspension section model is a main method for vibration measurement in a bridge wind tunnel test and is also a main means for identifying bridge pneumatic parameters. The free vibration test device under the traditional test windage yaw angle adopts an arc track fixed on a wind tunnel top plate and a bottom plate, fixes an experimental model on the arc track through a threaded rod, and realizes the adjustment of the bridge section windage yaw angle through a bolt hole reserved on the arc track. Due to the fact that holes need to be drilled in the wind tunnel top bottom plate, the adjusting mode is poor in adaptability to experimental models with different sizes, and the wind deflection angle is difficult to achieve continuous adjustment in the experimental process. The arc-shaped track is relatively complicated to manufacture and install. In the traditional wind tunnel test, a bridge experimental model is usually used as a rigid suspension arm through a hollow pipe, but in the oblique wind test, the hollow pipe is inconvenient to be connected with an end part special-shaped section, and the distortion problem of end part streaming can be caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide a bridge inclined wind test vibration device, which solves the problems that the conventional vibration device is difficult to realize continuous adjustment of a wind deflection angle and end flow interference exists.
The utility model is realized by the following technical scheme:
a bridge oblique wind test vibration device comprises a segment model and a spring support, wherein the segment model and the spring support are arranged in a wind tunnel;
the two sides of the segment model are respectively connected with a suspension arm and an abnormal-shaped segment, and the segment model is connected with the abnormal-shaped segment through the suspension arm; the segment model and the two special-shaped segments form an inclined segment rigid model;
the tail end of the spring support is provided with a magnetic gauge stand, and the spring support is adsorbed on the top plate and the bottom plate of the wind tunnel through the magnetic gauge stand.
Further, the spring support comprises a suspension spring and a connection rope, one end of the suspension spring is connected with the suspension arm in a hanging mode, the other end of the suspension spring is connected with the connection rope, and the connection rope is connected with the magnetic meter base.
Furthermore, the spring support still includes the turn buckle, and the connection rope passes through the turn buckle to be connected with the magnetic gauge stand.
Furthermore, connecting rods with threads are arranged on two sides of the segment model, a through hole is formed in the middle of the suspension arm, a threaded hole is formed in the inner side wall of the special-shaped segment, and the connecting rods penetrate through the through hole and then are connected with the threaded hole and the threads.
Furthermore, a plurality of hanging holes used for being connected with the spring support are formed in the two ends of the suspension arm.
Further, the davit is the rectangular plate.
Furthermore, the horizontal projection of the special-shaped section is a right trapezoid, and the acute angle of the right trapezoid is the same as the simulated wind deflection angle.
Furthermore, four spring supports are arranged and correspondingly arranged at four corners of the segment model.
Compared with the prior art, the utility model has the following beneficial technical effects:
the utility model discloses a bridge inclined wind test vibration device, which comprises a segment model, a spring support, as well as suspension arms and special-shaped sections which are arranged at two sides of the segment model, wherein the segment model is connected with the special-shaped sections through the suspension arms; the special-shaped section fixed on the suspension arm simulates the pneumatic appearance of the inclined section under different wind deflection angles, so that the flow interference generated by end vortex is effectively avoided. Compared with the conventional wind tunnel experimental equipment, the utility model has the advantages of simple structure, convenient test operation and manufacture and easy guarantee of test precision.
Furthermore, the spring support comprises a suspension spring, a connecting rope and a turnbuckle, the connecting rope is connected with the magnetic gauge stand through the turnbuckle, the attack angle (namely the wind attack angle) between the main beam and the incoming wind is continuously adjusted to a specific value through the length of the telescopic turnbuckle, and the continuous adjustment of the wind attack angle of the bridge can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a bridge inclined wind test vibration device according to the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is an exploded view of the bridge oblique wind test vibration device of the present invention.
Wherein: 1 is the segment model, 2 is the davit, and 3 is special-shaped section, and 4 are suspension spring, and 5 are connecting the rope, and 6 are the turnbuckle, and 7 are the magnetic gauge stand, and 8 are the connecting rod, and 9 are the through-hole, and 10 are the hookup hole.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings:
as shown in FIGS. 1 to 3, the utility model discloses a bridge oblique wind test vibration device, which comprises a segment model 1 and a spring bracket, wherein the segment model 1 is arranged in a wind tunnel; the two sides of the segment model 1 are respectively connected with a suspension arm 2 and an abnormal-shaped segment 3, and the segment model 1 is connected with the abnormal-shaped segment 3 through the suspension arm 2; the segment model 1 and the two special-shaped segments 3 form an inclined segment rigid model; the tail end of the spring support is provided with a magnetic gauge stand 7, and the spring support is adsorbed on the top plate and the bottom plate of the wind tunnel through the magnetic gauge stand 7.
As shown in fig. 2, the wind deflection angle β is continuously adjusted by fixing the position of the magnetic gauge stand 7, so that the included angle between the incoming wind direction and the axial direction of the oblique segment is ensured to be a specific wind deflection angle, and the end surface of the outer side of the special-shaped segment 3 is consistent with the incoming wind direction.
Specifically, as shown in fig. 1, the spring support includes a suspension spring 4 and a connection rope 5, one end of the suspension spring 4 is hooked with the suspension arm 2, the other end of the suspension spring is connected with the connection rope 5, and the connection rope 5 is connected with the magnetic gauge stand 7.
Preferably, the spring support further comprises a turnbuckle 6, and the connecting rope 5 is connected with the magnetic gauge stand 7 through the turnbuckle 6. By extending and retracting the length of the turnbuckle 6, as shown in fig. 1, the angle of attack α between the main beam and the incoming wind, i.e., the wind angle of attack, is continuously adjusted to a specific value, for example, if the wind angle of attack is increased, the upper end 4 turnbuckles 6 are shortened, and the lower end four turnbuckles 6 are extended.
As shown in FIG. 3, threaded connecting rods 8 are arranged on two sides of the segment model 1, a through hole 9 is formed in the middle of the suspension arm 2, a threaded hole is formed in the inner side wall of the special-shaped segment 3, and the connecting rods 8 penetrate through the through hole 9 and then are in threaded connection with the threaded hole.
Preferably, a plurality of hanging holes 10 are formed at two ends of the suspension arm 2, and the distance between the transverse bridging suspension points of the spring can be realized by connecting different hanging holes 10.
As shown in fig. 2, the horizontal projection of the special-shaped section 3 is a right trapezoid, and the acute angle of the right trapezoid is the same as the simulated wind deflection angle. According to the experimental requirements of different wind deflection angles, the special-shaped section 3 can be cut by a corresponding angle.
As shown in fig. 1, specifically, four spring supports are provided, and are correspondingly provided at four corners of the segmental model 1.
During the experiment, through the position of parallel translation magnetic gauge stand 7, adjust the windage yaw angle of festival section model 1 to guarantee that 3 tip of dysmorphism section are parallel with the incoming flow wind direction, thereby satisfy the experimental requirement under the oblique wind effect. And after the model is installed, changing the wind speed in the wind tunnel to carry out vibration tests under different wind field conditions.
Through the fixed bridge experiment model of magnetic gauge stand 7, avoided traditional test device to need the operation of drilling on wind-tunnel roof and bottom plate, the position of magnetic gauge stand 7 is manual adjustment very easily to can conveniently change the position of magnetic gauge stand 7 in order to realize the continuous regulation of windage yaw angle, and can adapt to the experiment model of not unidimensional. The special-shaped section 3 fixed on the suspension arm 2 simulates the pneumatic appearance of the inclined section under different wind deflection angles, so that the flow interference generated by end vortexes is effectively avoided.
Compared with the conventional wind tunnel experimental equipment, the utility model has the advantages of simple structure, convenient test operation and manufacture and easy guarantee of test precision.
Claims (8)
1. A bridge oblique wind test vibration device is characterized by comprising a segment model (1) and a spring support, wherein the segment model (1) is arranged in a wind tunnel;
two sides of the segment model (1) are respectively connected with a suspension arm (2) and an abnormal-shaped segment (3), and the segment model (1) is connected with the abnormal-shaped segment (3) through the suspension arm (2); the segment model (1) and the two special-shaped segments (3) form an inclined segment rigid model;
the tail end of the spring support is provided with a magnetic gauge stand (7), and the spring support is adsorbed on the top plate and the bottom plate of the wind tunnel through the magnetic gauge stand (7).
2. The bridge inclined wind test vibration device according to claim 1, characterized in that the spring support comprises a suspension spring (4) and a connecting rope (5), one end of the suspension spring (4) is connected with the suspension arm (2) in a hanging mode, the other end of the suspension spring is connected with the connecting rope (5), and the connecting rope (5) is connected with the magnetic gauge stand (7).
3. The bridge oblique wind test vibration device according to claim 2, characterized in that the spring support further comprises a turnbuckle (6), and the connection rope (5) is connected with the magnetic gauge stand (7) through the turnbuckle (6).
4. The bridge oblique wind test vibration device according to claim 1, characterized in that threaded connecting rods (8) are arranged on two sides of the segment model (1), a through hole (9) is formed in the middle of the suspension arm (2), a threaded hole is formed in the inner side wall of the special-shaped segment (3), and the connecting rods (8) penetrate through the through hole (9) and then are connected with the threaded hole and the threads.
5. The bridge oblique wind test vibration device according to claim 1, characterized in that a plurality of hanging holes (10) for connecting with a spring support are arranged at two ends of the suspension arm (2).
6. The bridge oblique wind test vibration device according to claim 1, characterized in that the suspension arm (2) is a rectangular plate.
7. The bridge oblique wind test vibration device according to claim 1, characterized in that the horizontal projection of the special-shaped section (3) is a right trapezoid, and the acute angle of the right trapezoid is the same as the simulated wind deflection angle.
8. The bridge oblique wind test vibration device according to claim 1, wherein the number of the spring supports is four, and the spring supports are correspondingly arranged at four corners of the segment model (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121988874.4U CN215640035U (en) | 2021-08-23 | 2021-08-23 | Bridge oblique wind test vibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121988874.4U CN215640035U (en) | 2021-08-23 | 2021-08-23 | Bridge oblique wind test vibration device |
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| Publication Number | Publication Date |
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| CN215640035U true CN215640035U (en) | 2022-01-25 |
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| CN202121988874.4U Active CN215640035U (en) | 2021-08-23 | 2021-08-23 | Bridge oblique wind test vibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117589418A (en) * | 2024-01-18 | 2024-02-23 | 石家庄铁道大学 | Segment model wind tunnel test device of multi-body separation structure |
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2021
- 2021-08-23 CN CN202121988874.4U patent/CN215640035U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117589418A (en) * | 2024-01-18 | 2024-02-23 | 石家庄铁道大学 | Segment model wind tunnel test device of multi-body separation structure |
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