CN112461490A - Wind tunnel free vibration test device for large-attack-angle bridge section model - Google Patents
Wind tunnel free vibration test device for large-attack-angle bridge section model Download PDFInfo
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- CN112461490A CN112461490A CN202011286710.7A CN202011286710A CN112461490A CN 112461490 A CN112461490 A CN 112461490A CN 202011286710 A CN202011286710 A CN 202011286710A CN 112461490 A CN112461490 A CN 112461490A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to the technical field of wind tunnel tests, in particular to a wind tunnel free vibration test device for a bridge section model with a large attack angle, which comprises a rigid support, wherein two ends of the rigid support are provided with rotary spring suspension systems, each rotary spring suspension system comprises a rotating mechanism for adjusting the wind attack angle of the bridge section model and a suspension mechanism for mounting the bridge section model, the rigid support is also provided with a driving device for driving the rotating angle of the rotating mechanism to change so as to drive the bridge section model to rotate, the free vibration of the bridge section model can be effectively ensured through the rotary spring suspension systems in the test device, the vibration stability is improved, the driving device can also drive an annular turntable in the rotary spring suspension systems to rotate, the adjustment of the wind attack angle of the bridge section model is realized, the wind attack angle can be quickly and accurately adjusted, and errors caused by the traditional manual adjustment of the wind attack angle are avoided, so that the test result is more accurate.
Description
Technical Field
The invention relates to the technical field of wind tunnel test devices, in particular to a wind tunnel free vibration test device for a bridge section model with a large attack angle.
Background
The bridge flutter is a divergent vibration caused by the pneumatic negative damping generated by the self motion of the bridge section. The wind damage accident of Tacoma bridge in 1940 is the typical representative of the flutter damage of bridge. The existing test aiming at the flutter performance of the bridge is carried out in a wind tunnel, and the main means comprises a free vibration test and a forced vibration test, wherein the free vibration method is widely applied.
The existing free vibration device usually adjusts a wind attack angle (an included angle formed by a bridge section and incoming wind) through a manual means, the time consumption for adjusting the wind attack angle is long, and the influence of human errors on the precision of the wind attack angle is difficult to avoid, for example, the device can only adjust the wind attack angle of a bridge section model through manually rotating a hub, and has the following defects that the device is a Chinese invention patent with the publication number of CN108444670A and is a bridge vertical and torsional coupling large-amplitude free vibration wind tunnel test device: the operation is more complicated when adjusting the wind attack angle and human errors are easily introduced when manually adjusting the wind attack angle, which affects the test precision.
In addition, due to the component of the self gravity of the bridge section along the wind attack angle direction, the section model can slide from the center of the section to a certain extent. The phenomenon of sliding under a large wind attack angle is more obvious, most of the existing free vibration devices are not provided with limiting devices aiming at the sliding problem, and the test error is greatly increased.
Disclosure of Invention
In view of the above, the invention aims to provide a wind tunnel free vibration test device for a bridge section model with a large attack angle, which effectively ensures free vibration of the bridge section model, improves vibration stability, can also adjust the wind attack angle quickly and accurately, avoids errors caused by traditional manual adjustment of the wind attack angle, and enables test results to be more accurate.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a wind tunnel free vibration test device for a bridge section model with a large attack angle, which comprises a rigid support, wherein two ends of the rigid support are provided with a rotating spring suspension system, and the rotating spring suspension system comprises a rotating mechanism for adjusting the wind attack angle of the bridge section model and a suspension mechanism for mounting the bridge section model;
the rotating mechanism comprises an annular turntable which is rotatably arranged at two ends of the rigid support, the hanging mechanism is fixedly arranged on the annular turntable and comprises a mounting frame, a first slide rail group and a second slide rail group which are parallel to each other are arranged on the mounting frame, a pair of rigidity controllers used for meeting the free vibration requirement of the bridge section model are respectively arranged on the first slide rail group and the second slide rail group in a sliding manner, springs are arranged on the rigidity controllers, the springs on the two rigidity controllers which are respectively arranged on the first slide rail group and the second slide rail group and are positioned on the same side are connected through connecting pieces, a clamping plate used for mounting the bridge section model is arranged between the two connecting pieces, and two ends of the clamping plate are respectively hinged with the two connecting pieces;
and the rigid support is also provided with a driving device for driving the annular turntable to change the rotation angle so as to adjust the wind attack angle of the bridge section model.
Furthermore, at least two first circular rolling devices for supporting the annular turntable are arranged below the annular turntable on the rigid support.
Furthermore, a second round rolling device for limiting the annular turntable is arranged above the annular turntable.
Furthermore, the first circular rolling device and the second circular rolling device are both provided with limiting grooves for limiting the lateral movement of the annular turntable.
Further, the driving device comprises a transmission mechanism and a motor for driving the transmission mechanism to operate.
Furthermore, the transmission mechanism comprises a first transmission gear in transmission connection with the motor output shaft and a transmission shaft parallel to the axis of the first transmission gear, and a fourth transmission gear meshed with the first transmission gear is arranged on the transmission shaft.
Further, an arc-shaped rack coaxial with the annular turntable is fixedly arranged on the annular turntable, gear teeth for transmission are arranged on the side surface of one side, facing outwards in the radial direction, of the arc-shaped rack, and a second transmission gear and a third transmission gear which are meshed with the arc-shaped rack are respectively arranged at the two ends of the transmission shaft.
Further, the annular turntable and the arc-shaped rack are fixed with each other through a rigid connecting piece.
Furthermore, a flexible connecting piece used for offsetting the component of the gravity of the bridge section model along the wind attack angle direction is arranged between the clamping plate and the mounting frame.
Further, the flexible connecting piece is a flexible steel wire.
The invention has the beneficial effects that:
according to the wind tunnel free vibration test device for the bridge section model with the large attack angle, the rotating spring suspension systems are arranged at the two ends of the rigid support, the rotating spring suspension systems can effectively guarantee free vibration of the bridge section model in a test, vibration stability is improved, the driving device can also drive the annular rotary table in the rotating spring suspension systems to rotate, adjustment of the wind attack angle of the bridge section model is achieved, the wind attack angle can be adjusted rapidly and accurately, errors caused by traditional manual adjustment of the wind attack angle are avoided, and a test result is more accurate.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a general schematic diagram of an embodiment of a wind tunnel free vibration test device for a bridge section model with a large attack angle;
FIG. 2 is a schematic view of a rotary spring suspension system of the present invention;
FIG. 3 is a schematic view of a driving device according to the present invention;
FIG. 4 is a schematic view of a turning mechanism according to the present invention;
FIG. 5 is a schematic view of a suspension mechanism according to the present invention;
FIG. 6 is a schematic view of the annular turntable of the present invention;
FIG. 7 is a schematic view of an arcuate rack of the present invention;
FIG. 8 is a schematic view of a circular rolling device according to the present invention;
FIG. 9 is a schematic view of a stiffness controller according to the present invention;
FIG. 10 is a schematic view of a connection plate according to the present invention;
fig. 11 is a schematic view of the connector of the present invention.
Description of reference numerals:
1-a rigid support; 2-an annular turntable; 3-arc rack; 4-a mounting frame; 5-a first circular rolling device; 6-a limiting groove; 7-a motor; 8-a transmission shaft; 9-a first transmission gear; 10-a second transmission gear; 11-a third transmission gear; 12-a fourth transmission gear; 13-a first set of slide rails; 14-a second slide rail set; 15-a stiffness controller; 16-a spring; 17-a connector; 18-a splint; 19-a connecting plate; 20-second circular rolling means.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
As shown in fig. 1, which is a schematic view of an embodiment of a wind tunnel free vibration test device for a bridge section model with a large attack angle, the wind tunnel free vibration test device comprises a rigid support 1, wherein two ends of the rigid support 1 are provided with a rotating spring suspension system, and the rotating spring suspension system comprises a rotating mechanism for adjusting the wind attack angle of the bridge section model and a suspension mechanism for mounting the bridge section model. The rigid support 1 can enable the free vibration device to be more stable, during testing, the rigid support is generally erected on the outer wall of the wind tunnel, so that the interference of the erection inside the wind tunnel on a wind field is avoided, and the rigid support is connected with the ground through an external large base, so that the adverse condition that the rigid support 1 vibrates due to the vibration of the bridge section model is avoided;
as shown in fig. 2, the rotating mechanism includes an annular turntable 2, the annular turntable 2 is rotatably disposed at two ends of the rigid support 1, the suspension mechanism is fixedly disposed on the annular turntable 2, the suspension mechanism includes an installation frame 4, the installation frame 4 of this embodiment is rectangular, a first slide rail set 13 and a second slide rail set 14 which are parallel to each other are disposed on the installation frame 4, a pair of stiffness controllers 15 for satisfying the free vibration requirement of the bridge section model are respectively slidably disposed on the first slide rail set 13 and the second slide rail set 14, the first slide rail set 13 and the second slide rail set 14 of this embodiment both employ two slide rails, the stiffness controller 15 is provided with two through holes and is sleeved on the slide rails, and since the torsional stiffness and the torsional frequency are related to the transverse distance of the stiffness controller 15, the position of the stiffness controller 15 on the slide rails can be moved to control the transverse distance therebetween. As shown in fig. 9, the stiffness controllers 15 are provided with springs 16, the springs 16 of the two stiffness controllers 15 which are respectively arranged on the first slide rail set 13 and the second slide rail set 14 and located on the same side are connected through connecting pieces 17, a clamping plate 18 for mounting a bridge section model is arranged between the two connecting pieces 17, and two ends of the clamping plate 18 are respectively hinged with the two connecting pieces 17. Specifically, as shown in fig. 5, be equipped with the screw on the connecting piece 17 of this embodiment, splint 18 can guarantee through bolted connection with connecting piece 17 that splint can rotate around the bolt, thereby torsional vibration can take place for the bridge section model, still be equipped with the mounting hole that is used for installing the bridge section model on splint 18, splint 18 passes through bolted connection with the bridge section model, it needs to explain that, the bolt and splint 18 zonulae occludens here, splint 18 can not take place relative rotation with the bridge section model, thereby splint 18 can drive the rotation of bridge section model, change the angle of attack of wind.
Because the stiffness of the placed spring 16 determines the frequency and the vertical stiffness of the vertical vibration of the model, different springs are conveniently replaced in the test, in the embodiment, the spring 16 is in threaded connection with the connecting piece 17, wherein a threaded section is arranged at one end of the spring connected with the connecting piece, a screw hole is arranged on the connecting piece, the threaded section is in fit connection with the screw hole, and the threaded holes at two ends of the connecting piece 17 connect the springs 16 on the two stiffness controllers 15 on different slide rail sets together so as to meet the requirements of the vertical vibration and the torsional vibration of the bridge section model;
the rigid support 1 is also provided with a driving device for driving the annular turntable 2 to change the rotation angle so as to adjust the wind attack angle of the bridge section model. The driving device can realize quick and accurate adjustment of the wind attack angle, and avoids errors caused by traditional manual adjustment of the wind attack angle, so that the test result is more accurate.
Further, as shown in fig. 1, at least two first circular rolling devices 5 for supporting the annular rotary table 2 are arranged below the annular rotary table 2 on the rigid support 1. Specifically, in this embodiment, the first circular rolling devices 5 are set to two, the two ends of the rigid support 1 are respectively provided with the mounting columns, the two mounting columns are respectively provided with one circular rolling device 5 for supporting the annular turntable 2 below the annular turntable 2, and the two first circular rolling devices 5 are symmetrical about the vertical diameter of the annular turntable 2 in this embodiment, so as to ensure the supporting stability of the annular turntable 2.
Further, a second circular rolling device 20 for limiting the annular turntable 2 is arranged above the annular turntable. The second circular rolling devices 20 are respectively arranged on the two mounting upright columns above the annular turntable 2, have a limiting effect on the annular turntable 2 and enhance the overall stability of the device.
Further, the first circular rolling device 5 and the second circular rolling device 20 of the present embodiment are both provided with a limiting groove 6 for limiting the lateral movement of the annular turntable 2. The annular turntable 2 can rotate in the limiting groove 6, and the end parts on two sides of the limiting groove 6 are designed to prevent the annular turntable 2 from sliding out of the limiting groove 6, so that the lateral stability of the annular turntable 2 is ensured.
Further, the driving device of the present embodiment includes a transmission mechanism and a motor 7 for driving the transmission mechanism to operate. The motor 7 in the implementation adopts a servo motor, and the servo motor can be connected with a computer, so that the aim of controlling the servo motor to drive the rotating spring suspension system through the computer is fulfilled, and the aim of quickly and accurately adjusting the wind attack angle is fulfilled.
Further, as shown in fig. 3, the transmission mechanism of the present embodiment includes a first transmission gear 9 in transmission connection with the output shaft of the motor 7 and a transmission shaft 8 parallel to the axis of the first transmission gear 9, and a fourth transmission gear 12 engaged with the first transmission gear 9 is disposed on the transmission shaft 8.
Further, as shown in fig. 2, an arc-shaped rack 3 coaxial with the annular turntable 2 is fixedly arranged on the annular turntable 2 of the present embodiment, gear teeth for transmission are arranged on a side surface of one radially outward side of the arc-shaped rack 3, and a second transmission gear 10 and a third transmission gear 11 engaged with the arc-shaped rack 3 are respectively arranged at two ends of the transmission shaft 8. Through the meshing of the arc-shaped rack 3 and the transmission gear, the arc-shaped rack 3 can drive the annular turntable 2 to rotate, so that the wind attack angle is adjusted. In addition, the adjusting range of the wind attack angle can be controlled by controlling the size of the central angle corresponding to the arc edge of the arc-shaped rack 3.
As shown in fig. 1, a transverse platform is disposed on the top of the rigid support 1 of this embodiment, and a servo motor for controlling the rotation of the transmission gear can be disposed on the transverse platform of the rigid support 1, the two ends of the transmission shaft 8 extend out of the rigid support 1, and a second transmission gear 10 and a third transmission gear 11 disposed thereon are respectively engaged with the arc-shaped racks 3 at the two ends of the rigid support 1.
Further, the annular rotary table 2 and the arc-shaped rack 3 of the present embodiment are fixed to each other by a rigid connection member. Specifically, the rigid connection member used in this embodiment is the connection plate 19, as shown in fig. 4 and 10, the connection plate 19 is provided with 4 through holes, and is fixed by bolts, and the annular turntable 2 and the arc-shaped rack 3 are fixed to each other by three connection plates 19, so that the assembly and disassembly are easy.
Further, a flexible connecting piece for offsetting the component of the gravity of the bridge section model along the wind attack angle direction is arranged between the clamping plate 18 and the mounting frame 4. The flexible connecting piece can not influence the free vibration of the bridge section model in the test.
Further, the flexible connecting member of this embodiment is a flexible steel wire.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a big angle of attack bridge section model wind-tunnel free vibration test device which characterized in that: the device comprises a rigid support (1), wherein rotary spring suspension systems are arranged at two ends of the rigid support (1), and each rotary spring suspension system comprises a rotating mechanism for adjusting the wind attack angle of a bridge section model and a suspension mechanism for mounting the bridge section model;
the rotating mechanism comprises an annular turntable (2), the annular turntable (2) is rotatably arranged at two ends of the rigid support (1), the hanging mechanism is fixedly arranged on the annular turntable (2), the hanging mechanism comprises a mounting rack (4), a first sliding rail set (13) and a second sliding rail set (14) which are parallel to each other are arranged on the mounting rack (4), a pair of rigidity controllers (15) used for meeting the free vibration requirement of the bridge section model are respectively arranged on the first sliding rail set (13) and the second sliding rail set (14) in a sliding manner, springs (16) are arranged on the rigidity controllers (15), the springs (16) are respectively arranged on the first sliding rail set (13) and the second sliding rail set (14) and positioned on the same side of the two rigidity controllers (15) are connected through connecting pieces (17), a clamping plate (18) used for installing the bridge section model is arranged between the two connecting pieces (17), two ends of the clamping plate (18) are respectively hinged with the two connecting pieces (17);
and the rigid support (1) is also provided with a driving device for driving the rotation angle of the annular turntable (2) to change so as to adjust the wind attack angle of the bridge section model.
2. The wind tunnel free vibration test device for the bridge section model with the large attack angle of claim 1, which is characterized in that: at least two first circular rolling devices (5) used for supporting the annular turntable (2) are arranged below the annular turntable (2) on the rigid support (1).
3. The wind tunnel free vibration test device for the bridge section model with the large attack angle as claimed in claim 2, wherein: and a second round rolling device (20) for limiting the annular turntable (2) is arranged above the annular turntable.
4. The wind tunnel free vibration test device for the bridge section model with the large attack angle as claimed in claim 3, wherein: and the first circular rolling device (5) and the second circular rolling device (20) are respectively provided with a limiting groove (6) for limiting the lateral movement of the annular turntable (2).
5. The wind tunnel free vibration test device for the bridge section model with the large attack angle of claim 1, which is characterized in that: the driving device comprises a transmission mechanism and a motor (7) for driving the transmission mechanism to operate.
6. The wind tunnel free vibration test device for the bridge section model with the large attack angle as claimed in claim 5, wherein: the transmission mechanism comprises a first transmission gear (9) in transmission connection with an output shaft of the motor (7) and a transmission shaft (8) parallel to the axis of the first transmission gear (9), and a fourth transmission gear (12) meshed with the first transmission gear (9) is arranged on the transmission shaft (8).
7. The wind tunnel free vibration test device for the bridge section model with the large attack angle as claimed in claim 6, wherein: the annular turntable is characterized in that an arc-shaped rack (3) coaxial with the annular turntable (2) is fixedly arranged on the annular turntable, gear teeth for transmission are arranged on the side surface of one radial outward side of the arc-shaped rack (3), and a second transmission gear (10) and a third transmission gear (11) meshed with the arc-shaped rack (3) are respectively arranged at the two ends of the transmission shaft (8).
8. The wind tunnel free vibration test device for the bridge section model with the large attack angle of claim 7, wherein: the annular turntable (2) and the arc-shaped rack (3) are fixed with each other through a rigid connecting piece.
9. The wind tunnel free vibration test device for the bridge section model with the large attack angle of claim 1, which is characterized in that: and a flexible connecting piece used for offsetting the component of the self gravity of the bridge section model along the wind attack angle direction is arranged between the clamping plate (18) and the mounting rack (4).
10. The wind tunnel free vibration test device for the bridge section model with the large attack angle of claim 9, wherein: the flexible connecting piece is a flexible steel wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011286710.7A CN112461490A (en) | 2020-11-17 | 2020-11-17 | Wind tunnel free vibration test device for large-attack-angle bridge section model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011286710.7A CN112461490A (en) | 2020-11-17 | 2020-11-17 | Wind tunnel free vibration test device for large-attack-angle bridge section model |
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| CN112461490A true CN112461490A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011286710.7A Pending CN112461490A (en) | 2020-11-17 | 2020-11-17 | Wind tunnel free vibration test device for large-attack-angle bridge section model |
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| CN (1) | CN112461490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894429A (en) * | 2022-04-14 | 2022-08-12 | 西南交通大学 | Device and method for wind tunnel pressure measurement test of suspension type monorail train |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329524A (en) * | 1996-06-06 | 1997-12-22 | Masaru Matsumoto | Wind tunnel experimenting apparatus |
| KR20100056155A (en) * | 2008-11-19 | 2010-05-27 | (주)대우건설 | Portable wind tunnel testing apparatus for a bridge |
| CN104833474A (en) * | 2015-04-15 | 2015-08-12 | 国网河南省电力公司电力科学研究院 | Inner-support spring suspended wire segment model vibration measurement test apparatus |
| CN105215068A (en) * | 2015-10-26 | 2016-01-06 | 扬中市三环电热科技有限公司 | A kind of semi-automatic powder feeding machine transmission mechanism |
| CN107588923A (en) * | 2017-07-28 | 2018-01-16 | 大连理工大学 | A kind of large amplitude free torsional vibration flow tunnel testing device |
| CN108225715A (en) * | 2018-03-06 | 2018-06-29 | 大连理工大学 | A kind of Three Degree Of Freedom large amplitude free vibration flow tunnel testing device |
| CN108414186A (en) * | 2018-02-08 | 2018-08-17 | 大连理工大学 | A kind of bridge is vertical and twisted coupling large amplitude free vibration flow tunnel testing device |
-
2020
- 2020-11-17 CN CN202011286710.7A patent/CN112461490A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329524A (en) * | 1996-06-06 | 1997-12-22 | Masaru Matsumoto | Wind tunnel experimenting apparatus |
| KR20100056155A (en) * | 2008-11-19 | 2010-05-27 | (주)대우건설 | Portable wind tunnel testing apparatus for a bridge |
| CN104833474A (en) * | 2015-04-15 | 2015-08-12 | 国网河南省电力公司电力科学研究院 | Inner-support spring suspended wire segment model vibration measurement test apparatus |
| CN105215068A (en) * | 2015-10-26 | 2016-01-06 | 扬中市三环电热科技有限公司 | A kind of semi-automatic powder feeding machine transmission mechanism |
| CN107588923A (en) * | 2017-07-28 | 2018-01-16 | 大连理工大学 | A kind of large amplitude free torsional vibration flow tunnel testing device |
| CN108414186A (en) * | 2018-02-08 | 2018-08-17 | 大连理工大学 | A kind of bridge is vertical and twisted coupling large amplitude free vibration flow tunnel testing device |
| CN108225715A (en) * | 2018-03-06 | 2018-06-29 | 大连理工大学 | A kind of Three Degree Of Freedom large amplitude free vibration flow tunnel testing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894429A (en) * | 2022-04-14 | 2022-08-12 | 西南交通大学 | Device and method for wind tunnel pressure measurement test of suspension type monorail train |
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Application publication date: 20210309 |
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