CN221594231U - Wind tunnel vibration measuring system - Google Patents
Wind tunnel vibration measuring system Download PDFInfo
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- CN221594231U CN221594231U CN202420142067.8U CN202420142067U CN221594231U CN 221594231 U CN221594231 U CN 221594231U CN 202420142067 U CN202420142067 U CN 202420142067U CN 221594231 U CN221594231 U CN 221594231U
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- 238000012360 testing method Methods 0.000 claims abstract description 68
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The utility model discloses a wind tunnel vibration measuring system, which comprises a wind tunnel test channel and two model brackets, wherein the two model brackets are separated from two sides of the wind tunnel test channel, and the arrangement direction of the two model brackets is vertical to the length direction of the wind tunnel test channel; the model support comprises a floating arm which is horizontally arranged, and the extending direction of the floating arm is parallel to the length direction of the wind tunnel test channel; elastic supporting components are respectively arranged at two ends of the floating arm, and the floating arm is suspended by the elastic supporting components; and yielding windows are respectively formed in the wall of the wind tunnel test channel corresponding to the two model brackets, a supporting cantilever is fixed on the floating arm, the supporting cantilever is horizontally arranged, and the free end of the supporting cantilever extends into the corresponding yielding window. The wind tunnel vibration testing device has the remarkable effects that the test model is suspended through the springs, so that the test model can be subjected to vertical bending test and torsion test, and the wind tunnel vibration testing is greatly facilitated for personnel.
Description
Technical Field
The utility model relates to the technical field of civil engineering, in particular to a wind tunnel testing device for a civil structure.
Background
The large-span bridge structure is generally a flexible and long structure, the action of wind on the bridge structure approximately meets the slice theory, and the wind-induced vibration response of the large-span bridge structure can be studied through a segment model wind tunnel test.
In the preliminary design stage of the large-span bridge structure, pneumatic model selection is generally carried out through a segment model test, and the pneumatic performance of the large-span bridge structure is also tested through the segment model test, so that the segment model test of the bridge structure is an important bridge structure model test and is also the wind tunnel test which is most widely applied. Three component force coefficients, pneumatic derivatives and the like of the bridge section can be measured through a large-span bridge segment model test, and an analysis basis is provided for wind resistance design of a large-span bridge structure. Meanwhile, a two-degree-of-freedom flutter critical wind speed test and a vortex-induced vibration response test can be performed on the bridge structure through a segment model test. However, there are few studies on vertical bending (up-and-down reciprocating play of the model) and torsion (reciprocating rotation of the model around the center of gravity) of the segment test model.
Disclosure of utility model
The utility model provides a system for synchronously testing wind vertical bending and torsion conditions of a segment test model, which adopts the following main technical scheme:
a wind tunnel vibration measuring system is characterized in that: the wind tunnel test device comprises a wind tunnel test channel and two model brackets, wherein the two model brackets are separated from two sides of the wind tunnel test channel, and the arrangement direction of the two model brackets is perpendicular to the length direction of the wind tunnel test channel;
the model support comprises a floating arm which is horizontally arranged, and the extending direction of the floating arm is parallel to the length direction of the wind tunnel test channel;
Elastic supporting components are respectively arranged at two ends of the floating arm, and the floating arm is suspended by the elastic supporting components;
yield windows are respectively arranged on the wall of the wind tunnel test channel corresponding to the two model brackets,
The floating arm is fixedly provided with a supporting cantilever, the supporting cantilever is horizontally arranged, and the free end of the supporting cantilever stretches into the corresponding abdication window.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of A-A' of FIG. 1.
Detailed Description
The utility model is further described below with reference to examples and figures.
As shown in fig. 1 and 2, a wind tunnel vibration measuring system includes a wind tunnel test channel a, two model brackets b, where the two model brackets b are separated from two sides of the wind tunnel test channel a, and the wind tunnel test channel a is located on a wind tunnel of the wind tunnel system and is an effective part for wind tunnel test, and the wind tunnel system further includes several other matched components, and these components and assembly relationships are well known to those skilled in the art and are not described herein.
The arrangement direction of the two model brackets b is perpendicular to the length direction of the wind tunnel test channel a;
The model support b comprises a floating arm b1, the floating arm b1 is horizontally arranged, and the extending direction of the floating arm b1 is parallel to the length direction of the wind tunnel test channel a;
Elastic supporting components are respectively arranged at two ends of the floating arm b1, and the floating arm b1 is suspended by the elastic supporting components so as to maintain the test model in a suspended state;
A yielding window is respectively formed on the wall of the wind tunnel test channel a corresponding to the two model brackets b; the floating arm b1 is fixedly provided with a supporting cantilever b2, the supporting cantilever b2 is horizontally arranged, the free end of the supporting cantilever b2 stretches into the corresponding yielding window, the free end of the supporting cantilever b2 is used for being connected with a test model, and the opening area of the yielding window is larger than the sectional area of the supporting cantilever b 2. The yielding window can be of a rectangular structure, and the length of the yielding window is determined according to the up-and-down movement of the test model in the wind tunnel test.
The elastic support assembly comprises an upper spring b3 and a lower spring b4, the upper spring b3 is arranged in a hanging mode, the upper end of the upper spring b3 is fixed with the outer wall of the wind tunnel test channel a, and the lower end of the upper spring b3 is fixed with the floating arm b 1; the lower spring b4 is arranged in a hanging mode, the upper end of the lower spring b4 is fixed with the floating arm b1, and the lower end of the lower spring b4 is fixed with the outer wall of the wind tunnel test channel a. The specifications of the upper spring b3 and the lower spring b4 are completely consistent, and the initial connection position and state of the upper spring and the lower spring are adjusted so as to maintain the same prestress and opposite sizes of the upper spring and the lower spring.
The outer wall of the wind tunnel test channel a is also provided with a damper b5 corresponding to the floating arm b1, the working part of the damper is contacted with the floating arm b1 from the lower part to lift the floating arm b1, and the damper can be used for balancing the self gravity of the floating arm b 1.
The outer wall of the wind tunnel test channel a is also provided with a displacement sensor b6 corresponding to the floating arm b1, and the displacement sensor b6 can be a laser displacement sensor; at least two displacement sensors b6 are matched along the length direction of the same floating arm b1 so as to detect the multipoint displacement of the floating arm b1 and construct the floating state of the floating arm b 1; the working portion of the displacement sensor b6 faces the floating arm b1.
In order to keep the test model relatively fixed in the downwind direction, two ends of the floating arm b1 are respectively connected with a constraint rope b7, the constraint ropes b7 are horizontally arranged, and the extending direction of the constraint ropes b7 is parallel to the length direction of the wind tunnel test channel a; one end of the constraint rope b7 is fixedly connected with the end part corresponding to the floating arm b1, and one end of the constraint rope b7 is fixedly connected with the outer wall of the wind tunnel test channel a. The restraining rope b7 restrains the floating arm b1 in the vertical direction, and has a certain degree of freedom in the vertical direction.
The support cantilever b2 comprises a guide cylinder 71 and a guide rod 72 which are in sliding fit with each other, one end of the guide cylinder 71 is fixed on the floating arm b1 through fixing, the free end of the guide rod 72 is used for connecting a test model, and a guide rod locking hoop 73 is arranged on the guide cylinder 71. The guide cylinder 71 and the guide rod 72 which are matched with each other can prolong the support cantilever b2, and can be suitable for test models with different sizes.
The beneficial effects are that: by adopting the technical scheme of the utility model, the test model is suspended through the spring, so that the test model can be subjected to vertical bending test and torsion test, and the wind tunnel vibration test is greatly facilitated for personnel.
Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (6)
1. A wind tunnel vibration measuring system is characterized in that: the device comprises a wind tunnel test channel (a) and two model supports (b), wherein the two model supports (b) are separated from two sides of the wind tunnel test channel (a), and the arrangement direction of the two model supports (b) is perpendicular to the length direction of the wind tunnel test channel (a);
The model support (b) comprises a floating arm (b 1), the floating arm (b 1) is horizontally arranged, and the extending direction of the floating arm (b 1) is parallel to the length direction of the wind tunnel test channel (a);
elastic supporting components are respectively arranged at two ends of the floating arm (b 1), and the floating arm (b 1) is suspended by the elastic supporting components;
yielding windows are respectively formed on the wall of the wind tunnel test channel (a) corresponding to the two model brackets (b);
The floating arm (b 1) is fixedly provided with a supporting cantilever (b 2), the supporting cantilever (b 2) is horizontally arranged, and the free end of the supporting cantilever (b 2) stretches into the corresponding abdication window.
2. The wind tunnel vibration measuring system according to claim 1, wherein: the elastic support assembly comprises an upper spring (b 3) and a lower spring (b 4), the upper spring (b 3) is arranged in a hanging mode, the upper end of the upper spring (b 3) is fixed with the outer wall of the wind tunnel test channel (a), and the lower end of the upper spring (b 3) is fixed with the floating arm (b 1);
The lower spring (b 4) is arranged in a hanging mode, the upper end of the lower spring (b 4) is fixed with the floating arm (b 1), and the lower end of the lower spring (b 4) is fixed with the outer wall of the wind tunnel test channel (a).
3. The wind tunnel vibration measuring system according to claim 1, wherein: and a damper (b 5) corresponding to the floating arm (b 1) is further arranged on the outer wall of the wind tunnel test channel (a), and a working part of the damper is contacted with the floating arm (b 1) from the lower part to lift the floating arm.
4. The wind tunnel vibration measuring system according to claim 1, wherein: the outer wall of the wind tunnel test channel (a) is also provided with a displacement sensor (b 6) corresponding to the floating arm (b 1);
At least two displacement sensors (b 6) are matched along the length direction of the same floating arm (b 1);
The working part of the displacement sensor (b 6) faces the floating arm (b 1).
5. The wind tunnel vibration measuring system according to claim 1, 2, 3 or 4, wherein: two ends of the floating arm (b 1) are also respectively connected with a constraint rope (b 7), the constraint ropes (b 7) are horizontally arranged, and the extending direction of the constraint ropes (b 7) is parallel to the length direction of the wind tunnel test channel (a);
One end of the constraint rope (b 7) is fixedly connected with the end part corresponding to the floating arm (b 1), and one end of the constraint rope (b 7) is fixedly connected with the outer wall of the wind tunnel test channel (a).
6. The wind tunnel vibration measuring system according to claim 1, 2, 3 or 4, wherein: the support cantilever (b 2) comprises a guide cylinder (71) and a guide rod (72) which are in sliding fit with each other, one end of the guide cylinder (71) is fixed on the floating arm (b 1), the free end of the guide rod (72) is used for being connected with a test model, and a guide rod locking hoop (73) is arranged on the guide cylinder (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420142067.8U CN221594231U (en) | 2024-01-19 | 2024-01-19 | Wind tunnel vibration measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420142067.8U CN221594231U (en) | 2024-01-19 | 2024-01-19 | Wind tunnel vibration measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221594231U true CN221594231U (en) | 2024-08-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420142067.8U Active CN221594231U (en) | 2024-01-19 | 2024-01-19 | Wind tunnel vibration measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221594231U (en) |
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- 2024-01-19 CN CN202420142067.8U patent/CN221594231U/en active Active
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