Wind tunnel vibration test device suitable for high wind attack angles

Abstract

The present invention provides a wind tunnel vibration test device suitable for high wind attack angles, belonging to the technical field of wind tunnel vibration test, comprising: a fixed bracket, a rotating bracket, an elastic stretching component, an elastic torsion component and a synchronous rotation driving mechanism, wherein two rotating brackets are symmetrically and rotationally mounted on the fixed bracket; a slide rail is provided on the rotating bracket, and a sliding block with sliding fit is provided on the slide rail; the two ends of the segment model to be measured for vibration are rotationally mounted on the two sliders, and the moving direction of the slider is perpendicular to the upper plane of the segment model; the elastic stretching component is correspondingly connected between the slider and the rotating bracket on the same side, and the telescopic direction of the elastic stretching component is consistent with the moving direction of the slider; the two elastic torsion components are connected between the two ends of the segment model and the slider on the same side; the synchronous rotation driving mechanism drives the rotating bracket, the elastic stretching component and the segment model to rotate synchronously. The present invention can improve the accuracy of the vibration measurement results of the segment model wind tunnel test, and has good versatility.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel vibration test, and in particular relates to a wind tunnel vibration test device suitable for high wind attack angles. Background Art

[0002] Large-span bridge structures have the characteristics of low stiffness, high flexibility, low damping and light weight. They are highly sensitive to wind effects and their test models need to be tested in wind tunnels to further detect their wind resistance in natural environments, thereby optimizing the design of the bridge.

[0003] The segment model test of a large-span bridge structure is a very important bridge structure model test and is also the most widely used wind tunnel test. The segment model test uses a segment of the bridge main beam as the test model and does not require the production of a full bridge model, so the requirements for the wind tunnel section size are smaller.

[0004] The existing technologies for wind tunnel vibration testing of segment models have the following main deficiencies: (1) It is impossible to automatically change the incoming wind angle; (2) Usually only the segment model is rotated, while the springs in the model spring suspension system do not rotate synchronously with the segment model, which will cause the spring stiffness in the normal direction of the segment model to change. This effect can be ignored at smaller wind angles, but there will be obvious errors in the vibration test results at larger wind angles; (3) The linear stiffness and torsional stiffness of the springs in the model spring suspension system cannot be adjusted independently, which cannot meet the needs of simulating actual engineering conditions; (4) Under the action of the incoming wind, the segment model will inevitably sway in the direction of the wind. This sway in the direction of the wind will pull the springs and change the vertical stiffness of the model spring suspension system, which will significantly interfere with the accuracy of the test. Summary of the invention

[0005] The embodiment of the present invention provides a wind tunnel vibration test device suitable for high wind attack angles, aiming to solve the problem of inaccurate vibration measurement results in existing segment model wind tunnel tests.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a wind tunnel vibration test device suitable for high wind attack angles, including: a fixed bracket, two rotating brackets, two elastic stretching components, two elastic torsion components and a synchronous rotation drive mechanism, the two rotating brackets are symmetrically and rotationally installed on the fixed bracket; a slide rail is provided on the rotating bracket, and a sliding slider is provided on the slide rail; the two ends of the segment model to be measured are rotationally installed on the two sliders, and the moving direction of the slider is perpendicular to the upper plane of the segment model; the two elastic stretching components are correspondingly connected between the slider and the rotating bracket on the same side, and the extension and contraction direction of the elastic stretching component is consistent with the moving direction of the slider; the two elastic torsion components are connected between the two ends of the segment model and the slider on the same side; the synchronous rotation drive mechanism is installed between the fixed bracket and the rotating bracket to drive the rotating bracket, the elastic stretching component and the segment model to rotate synchronously.

[0007] In one feasible manner, the elastic stretching assembly includes two stretching springs, which are respectively connected to the upper and lower ends of the slider; wherein one end of the stretching spring is connected to the rotating bracket through an adjusting bolt, and the other end is hung on the slider through a hook.

[0008] In an achievable manner, a rotating shaft is provided on the slider, the rotating shaft is connected to the segment model, two ends of the segment model are rotatably connected to the slider via the rotating shaft, and a limiter is provided on the rotating shaft;

[0009] The elastic torsion assembly includes two torsion springs, which are respectively sleeved on the rotating shaft and installed between the sliding block and the limiter.

[0010] In one achievable manner, the limiter includes a sleeve and a locking screw radially passing through the sleeve, and the sleeve is fastened to the rotating shaft by the locking screw.

[0011] In one feasible manner, the synchronous rotation drive mechanism includes a motor, two main synchronous wheels, two slave synchronous wheels and a transmission rod; the motor is mounted on the fixed bracket, one end of the transmission rod is coaxially connected to the main shaft of the motor through a coupling, the two main synchronous wheels are coaxially mounted on both ends of the transmission rod, the two slave synchronous wheels are respectively mounted on the two rotating brackets, and the main synchronous wheel and the slave synchronous wheel on the same side are connected by a transmission belt.

[0012] In one feasible manner, a long hole is provided in the middle of the slide rail for the slider to move up and down, and the slide rail is also provided with four slide grooves extending up and down, and the slider is provided with four rows of pulleys that slide with the slide grooves, and the slider is limited on the slide rail by the pulleys.

[0013] In one feasible manner, the fixed bracket includes a symmetrically arranged triangular bracket, a support is provided on the bottom rod of the triangular bracket, and both ends of the transmission rod are rotatably mounted on the support; the motor is mounted on the bottom rod of one of the triangular brackets; and the slave synchronous wheel is rotatably mounted on the vertex of the triangular bracket.

[0014] In one achievable manner, a mounting platform is provided on the side of the rotating bracket, and the slave synchronous wheel is fixed on the mounting platform.

[0015] In one achievable manner, the rotating bracket is a rectangular frame, and the slide rail constitutes a part of the rectangular frame.

[0016] Compared with the prior art, the wind tunnel vibration test device suitable for high wind attack angles provided by the present invention has the following beneficial effects:

[0017] (1) In view of the inability to automatically change the incoming wind attack angle, the present invention uses a synchronous rotation drive mechanism installed between the fixed support and the rotating support to drive the rotating support and the elastic stretching component, the segment model and the elastic torsion component installed on the rotating support to synchronously rotate at the same angle, so that the angle of the segment model can be adjusted according to the test requirements to achieve the adjustment of the incoming wind attack angle. The incoming wind attack angle can be controlled by the synchronous rotation drive mechanism.

[0018] (2) In order to improve the accuracy of vibration measurement results at high wind attack angles, the elastic stretching component in the present invention is installed on the rotating bracket, and the elastic torsion component is installed on the segment model. Therefore, during the rotation of the rotating bracket, the segment model and the elastic stretching component will keep rotating synchronously, and the two can rotate synchronously at the same angle. Therefore, the telescopic direction of the elastic stretching component can always remain perpendicular to the upper plane of the segment model. Therefore, whether it is a small wind attack angle or a large wind attack angle, the vibration measurement result is relatively accurate. Among them, the spring stiffness of the segment model normal is also the spring stiffness of the elastic stretching component perpendicular to the segment model.

[0019] (3) In order to solve the problem that the linear stiffness and torsional stiffness of the spring cannot be adjusted independently, the elastic tensile component and the elastic torsion component in the present invention are installed separately, and the two do not interfere with each other in the installation structure. Therefore, the two can be replaced separately, that is, they can be adjusted separately. Therefore, the two-degree-of-freedom dynamic characteristics of building structures, bridges, and wind turbine blade structures in actual engineering can be simulated, thereby improving the versatility of the device and the accuracy of the vibration measurement results.

[0020] (4) In order to prevent the segment model from shaking in the direction of the wind under the action of the incoming wind, the segment model in the present invention is installed on a slider, which can slide in a straight line on the slide rail without sliding in directions other than the straight line. Therefore, the vertical stiffness (vertical direction) of the elastic stretching component will not be changed, thereby avoiding the problem of interference with the test results, thereby improving the accuracy of the test results.

[0021] The present invention can simulate the vertical linear motion of the segment model in the crosswind direction and the torsional motion of the segment model due to rotation through the elastic stretching component and the elastic torsion component, and by selecting and replacing different elastic stretching components and elastic torsion components, the change of spring stiffness and thus the dynamic characteristics of the segment model can be changed, thereby simulating the dynamic characteristics of the actual structure to the greatest extent and providing support for the accuracy of the test results.

[0022] The present invention is suitable for wind tunnel vibration testing of segment models of engineering structures such as building structures, bridges, and wind turbine blades. It is used to test the vibration response characteristics of a segment model of a two-dimensional cross-section of the engineering structure under different wind attack angles, and can more accurately and quickly test the crosswind displacement response of the segment model under the action of incoming wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a wind tunnel vibration test device suitable for high wind attack angles provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of a rotating bracket provided in an embodiment of the present invention;

[0025] Description of reference numerals:

[0026] 1. Rotating bracket; 2. Slave synchronous wheel; 3. Transmission belt; 4. Triangular bracket; 5. Main synchronous wheel; 6. Transmission rod; 7. Motor; 8. Torsion spring; 9. Limiter; 10. Slider; 11. Slide rail; 12. Tension spring; 13. Segment model; 14. Pulley; 15. Adjusting bolt; 16. Buckle; 17. Slide groove; 18. Installation platform; 19. Locking top screw; 20. Rotating shaft. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] In the claims, specification and above-mentioned drawings of the present invention, terms such as "upper", "lower", "front", "back", "left", "right", "length", "width", "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientation or position relationship are based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0029] Please also read Figure 1 and Figure 2 , the wind tunnel vibration test device suitable for high wind attack angle provided by the present invention is now described. The wind tunnel vibration test device suitable for high wind attack angle comprises: a fixed bracket, two rotating brackets 1, two elastic stretching components, two elastic torsion components and a synchronous rotation driving mechanism, wherein the two rotating brackets 1 are symmetrically and rotationally mounted on the fixed bracket; a slide rail 11 is provided on the rotating bracket 1, and a sliding block 10 is provided on the sliding rail 11; the two ends of the segment model 13 to be measured are rotationally mounted on the two sliders 10, and the moving direction of the slider 10 is perpendicular to the upper plane of the segment model 13; the two elastic stretching components are correspondingly connected between the slider 10 and the rotating bracket 1 on the same side, and the telescopic direction of the elastic stretching component is consistent with the moving direction of the slider 10, and therefore, the telescopic direction of the elastic stretching component is perpendicular to the upper plane of the segment model 13; the two elastic torsion components are connected between the two ends of the segment model 13 and the slider 10 on the same side; the synchronous rotation driving mechanism is installed between the fixed bracket and the rotating bracket 1, driving the rotating bracket 1, the elastic stretching component and the segment model 13 to rotate synchronously.

[0030] Compared with the prior art, the wind tunnel vibration test device suitable for high wind attack angles provided by the present invention has the following beneficial effects:

[0031] (1) In view of the inability to automatically change the incoming wind attack angle, the present invention uses a synchronous rotation drive mechanism installed between the fixed support and the rotating support 1 to drive the rotating support 1 and the elastic stretching component, the segment model 13 and the elastic torsion component installed on the rotating support 1 to synchronously rotate at the same angle, so that the angle of the segment model 13 can be adjusted according to the test requirements to achieve the adjustment of the incoming wind attack angle. Among them, the incoming wind attack angle can be controlled by the synchronous rotation drive mechanism.

[0032] (2) In order to improve the accuracy of the vibration measurement results at high wind attack angles, the elastic stretching component in the present invention is installed on the rotating bracket 1, and the elastic torsion component is installed on the segment model 13. Therefore, during the rotation of the rotating bracket 1, the segment model 13 and the elastic stretching component will keep rotating synchronously, and the two can rotate synchronously at the same angle, so the extension direction of the elastic stretching component can always remain perpendicular to the upper plane of the segment model 13. Therefore, whether it is a small wind attack angle or a large wind attack angle, the vibration measurement result is relatively accurate. Among them, the spring stiffness of the segment model 13 in the normal direction is the spring stiffness of the elastic stretching component perpendicular to the segment model 13.

[0033] (3) In order to solve the problem that the linear stiffness and torsional stiffness of the spring cannot be adjusted independently, the elastic tensile component and the elastic torsion component in the present invention are installed separately, and the two do not interfere with each other in the installation structure. Therefore, the two can be replaced separately, that is, they can be adjusted separately. Therefore, the two-degree-of-freedom dynamic characteristics of building structures, bridges, and wind turbine blade structures in actual engineering can be simulated, thereby improving the accuracy of vibration measurement results.

[0034] (4) In order to prevent the segment model 13 from shaking in the direction of the wind under the action of the incoming wind, the segment model 13 in the present invention is installed on a slider 10, and the slider 10 can slide linearly on the slide rail 11 without sliding in directions other than the linear direction. Therefore, the vertical stiffness (vertical direction) of the elastic stretching component will not be changed, thereby avoiding the problem of interference with the test results, thereby improving the accuracy of the test results.

[0035] The present invention can simulate the vertical linear motion of the segment model 13 in the crosswind direction and the torsional motion of the segment model 13 due to rotation through the elastic stretching component and the elastic torsion component, and by selecting and replacing different elastic stretching components and elastic torsion components, the change of spring stiffness and thus the dynamic characteristics of the segment model 13 can be changed, thereby simulating the dynamic characteristics of the actual structure to the greatest extent and providing support for the accuracy of the test results.

[0036] The present invention is suitable for wind tunnel vibration testing of segment models of engineering structures such as building structures, bridges, and wind turbine blades. It is used to test the vibration response characteristics of a segment model of a two-dimensional cross-section of the engineering structure under different wind attack angles, and can more accurately and quickly test the crosswind displacement response of the segment model under the action of incoming wind.

[0037] The crosswind direction referred to in the present invention is the up-down direction or the vertical direction perpendicular to the large plane of the segment model 13 .

[0038] It should be noted that the industry generally defines the size of the wind attack angle as less than or equal to 3° as a small wind attack angle, and greater than 3° as a large wind attack angle. Since the elastic stretching component of the present invention can always maintain a telescopic direction perpendicular to the upper plane of the segment model 13, it can be applied to vibration tests of small wind attack angles and large wind attack angles; at the same time, the present invention can also choose to replace the elastic stretching component and the elastic torsion component with different spring stiffness according to the dynamic characteristics of the engineering structure in the actual environment, so it also has broad versatility in the tested engineering structure.

[0039] In some embodiments, see Figure 1 and Figure 2 The elastic stretching assembly includes two stretching springs 12, and the two stretching springs 12 are respectively connected to the upper and lower ends of the slider 10; wherein, one end of the stretching spring 12 is connected to the rotating bracket 1 through the adjusting bolt 15, and the other end is hung on the slider 10 through the hanging buckle 16. In the present invention, the adjusting bolt 15 can directly use a basket bolt to adjust the elongation of the stretching spring 12, so that the segment model 13 can be kept under the tested dynamic characteristics by adjusting the elongation of the stretching spring 12 without replacing the stretching spring 12. Among them, the hanging buckle 16 can be a hook or a hanging ring, and the hooks at both ends of the stretching spring 12 can be directly hung on the hanging ring, which is convenient for replacing the stretching springs 12 of different stiffness according to the dynamic characteristics of the actual engineering structure; and the basket bolt can be hung between the stretching spring 12 and the hanging buckle 16.

[0040] Specifically, hooks are respectively provided at the upper and lower ends of the slider 10 , and hooks are also provided on the rotating bracket 1 facing the upper and lower ends of the slider 10 .

[0041] In some embodiments, see Figure 1 and Figure 2 A rotating shaft 20 is provided on the slider 10, and the rotating shaft 20 is connected to the segment model 13. The two ends of the segment model 13 are rotatably connected to the slider 10 through the rotating shaft 20. Limiters 9 are respectively provided on the rotating shaft 20, and the limiters 9 are used to install and limit the torsion spring 8; the elastic torsion assembly includes two torsion springs 8, and the two torsion springs 8 are respectively mounted on the rotating shaft 20 and installed between the slider 10 and the limiter 9.

[0042] Among them, the slider 10 is provided with a through hole through which the rotating shaft 20 passes, and a bearing is installed in the through hole, and the rotating shaft 20 is rotatably connected with the bearing; at this time, the segment model 13 can be kept in the position after the rotation angle by the torsion spring 8. Since the torsion spring 8 is installed on the limiter 9, and the limiter 9 is fixed on the rotating shaft 20, the rotating shaft 20 and the segment model 13 are in a synchronous rotation relationship, therefore, the torsion spring 8 is connected between the slider 10 and the segment model 13, which can ensure that the segment model 13 and the slider 10 and the rotating bracket 1 rotate synchronously at the same angle; and by replacing the torsion spring 8 with different stiffness, the dynamic characteristics of the actual engineering structure can be simulated.

[0043] Therefore, the present invention can simulate the actual dynamic characteristics of different engineering structures by replacing the tension springs 12 and the torsion springs 8 with different stiffnesses, thereby providing more accurate test data for engineering construction.

[0044] In some embodiments, see Figure 1 and Figure 2 The stopper 9 includes a sleeve and a locking screw 19 radially passing through the sleeve, and the sleeve is fastened to the rotating shaft 20 through the locking screw 19. The sleeve of the present invention is rotatably mounted on the rotating shaft 20, and is locked on the rotating shaft 20 through two symmetrical locking screws 19, or three or four locking screws 19 uniformly distributed along the circumference of the sleeve; and the rotating sleeve drives the torsion spring 8 to obtain a certain elastic energy, which can keep the segment model 13 under the dynamic characteristics required for the test.

[0045] In some embodiments, see Figure 1 and Figure 2 , the synchronous rotation driving mechanism includes a motor 7, two main synchronous wheels 5, two slave synchronous wheels 2 and a transmission rod 6; the motor 7 is mounted on the fixed bracket, one end of the transmission rod 6 is coaxially connected to the main shaft of the motor 7 through a coupling, the two main synchronous wheels 5 are coaxially mounted on both ends of the transmission rod 6, the two slave synchronous wheels 2 are respectively mounted on two rotating brackets 1, and the main synchronous wheel 5 is connected to the slave synchronous wheel 2 on the same side through a transmission belt 3. For the synchronous rotation of the two rotating brackets 1, the present invention adopts a synchronous wheel and belt drive method, which can ensure the synchronous rotation of the two rotating brackets 1; in order to ensure the flexibility of rotation and thus ensure the synchronization of rotation, the main synchronous wheel 5 and the transmission rod 6 of the present application are keyed to ensure synchronous rotation, and the slave synchronous wheel 2 is fixedly connected to the rotating bracket 1 to ensure the synchronous rotation of the rotating bracket 1 and the slave synchronous wheel 2.

[0046] The present invention utilizes the motor 7 to automatically and accurately adjust the size of the incoming wind attack angle received by the segment model 13. When conducting the test, there is no need to manually enter the wind tunnel test section to operate, and the operation is more convenient and efficient.

[0047] The rotation of the motor 7 of the present invention can drive the transmission rod 6 to rotate, and then drive the two main synchronous wheels 5 fixed on the same transmission rod 6 to rotate synchronously; and through the transmission of the triangular transmission belt 3, the rotation of the two main synchronous wheels 5 below can drive the two outer slave synchronous wheels 2 above to rotate synchronously, thereby driving the rotating bracket 1 and the components installed on the rotating bracket 1 to rotate; and because the main synchronous wheel 5 and the slave synchronous wheel 2 have the same size, the angle of rotation of the motor 7 determines the size of the wind attack angle received by the segment model 13.

[0048] Optionally, the synchronous rotation driving mechanism may also use a chain drive to drive the rotating bracket and the segment model to rotate synchronously.

[0049] In some embodiments, see Figure 1 and Figure 2 The middle of the slide rail 11 is provided with a long hole for the slider 10 to move up and down, and the slide rail 11 is also provided with four slide grooves 17 extending up and down, and the slider 10 is provided with four rows of pulleys 14 that slide with the slide grooves 17, and the slider 10 is limited on the slide rail 11 by the pulleys 14. The slider 10 of the present invention is limited by the pulleys 14 and moves up and down along the slide rail 11, adopts a rolling sliding mode, reduces the friction resistance of the slider 10, improves the flexibility of the slider 10 sliding up and down, and further improves the sensitivity of the segment model 13 to wind vibration, thereby improving the accuracy of the test data.

[0050] In the present application, each row of pulleys 14 includes a plurality of pulleys, and four rows of pulleys 14 are disposed on both sides of the slide rail 11 to clamp the slide rail 11 and limit the slider 10 on the slide rail 11 .

[0051] In some embodiments, see Figure 1 and Figure 2 The fixed bracket includes a symmetrically arranged triangular bracket 4, a support is provided on the bottom rod of the triangular bracket 4, and the two ends of the transmission rod 6 are rotatably mounted on the support through bearings; the motor 7 is mounted on the bottom rod of one of the triangular brackets 4; the slave synchronous wheel 2 is rotatably mounted on the vertex of the triangular bracket 4. The slave synchronous wheel 2 is rotatably connected to the triangular bracket 4 through an axis, wherein a bearing is provided between the axis and the through hole provided at the vertex of the triangular bracket 4 to improve the continuity and sensitivity of the rotation of the slave synchronous wheel 2, ensure the sensitivity of the rotation between rotations, and further ensure the sensitivity of the segment model 13 to wind vibration. The fixed bracket of the present invention adopts the triangular bracket 4, which can not only provide stable support, but also has a simple structure and is easy to manufacture.

[0052] In order to ensure that the whole device does not shake and remains stable, during the test, the whole device is installed in the wind tunnel test section using a triangular bracket 4, and the motor 7 is fixed to the bottom rod of the triangular bracket 4 on one side.

[0053] In some embodiments, see Figure 1 and Figure 2 A mounting platform 18 is provided on the side of the rotating bracket 1, and the slave synchronous wheel 2 is fixed on the mounting platform 18. By providing the mounting platform 18, direct contact between the slave synchronous wheel 2 and the rotating bracket 1 can be avoided.

[0054] In some embodiments, see Figure 1 and Figure 2 The rotating bracket 1 is a rectangular frame, and the slide rail 11 constitutes a part of the rectangular frame. This method of designing the rotating bracket 1 as a frame can reduce the weight of the rotating bracket 1, not only can reduce the energy consumption of the motor 7, but also can improve the flexibility of the rotating bracket 1, thereby improving the sensitivity of the segment model 13 to vibration under wind force.

[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind tunnel vibration test device suitable for high wind attack angles, characterized in that: include: Fixed bracket; Two rotating brackets (1) are symmetrically and rotationally mounted on the fixed bracket; a slide rail (11) is provided on the rotating bracket (1), and a sliding block (10) is provided on the sliding rail (11); both ends of the segment model (13) to be measured are rotationally mounted on the two sliding blocks (10), and the moving direction of the sliding block (10) is perpendicular to the upper plane of the segment model (13); Two elastic stretching components are correspondingly connected between the slider (10) and the rotating bracket (1) on the same side, and the extension and retraction directions of the elastic stretching components are consistent with the moving direction of the slider (10); Two elastic torsion components are connected between the two ends of the segment model (13) and the slider (10) on the same side; and A synchronous rotation driving mechanism is installed between the fixed support and the rotating support (1), and drives the rotating support (1), the elastic stretching component and the segment model (13) to rotate synchronously.

2. The wind tunnel vibration test device suitable for high wind attack angles according to claim 1, characterized in that: The elastic stretching assembly comprises two stretching springs (12), and the two stretching springs (12) are respectively connected to the upper and lower ends of the slider (10); wherein one end of the stretching spring (12) is connected to the rotating bracket (1) via an adjusting bolt (15), and the other end is hung on the slider (10) via a hook (16).

3. The wind tunnel vibration test device suitable for high wind attack angles as claimed in claim 1, characterized in that: The slider (10) is provided with a rotating shaft (20), the rotating shaft (20) is connected to the segment model (13), and the two ends of the segment model (13) are rotatably connected to the slider (10) through the rotating shaft (20), and the rotating shaft (20) is provided with a limiter (9); The elastic torsion assembly comprises two torsion springs (8), the two torsion springs (8) are respectively sleeved on the rotating shaft (20) and installed between the slider (10) and the limiter (9).

4. The wind tunnel vibration test device suitable for high wind attack angles as claimed in claim 3, characterized in that: The stopper (9) comprises a sleeve and a locking top screw (19) radially passing through the sleeve, and the sleeve is fastened to the rotating shaft (20) via the locking top screw (19).

5. The wind tunnel vibration test device suitable for high wind attack angles according to claim 1, characterized in that: The synchronous rotation driving mechanism comprises a motor (7), two main synchronous wheels (5), two slave synchronous wheels (2) and a transmission rod (6); the motor (7) is mounted on the fixed bracket, one end of the transmission rod (6) is coaxially connected to the main shaft of the motor (7) through a coupling, the two main synchronous wheels (5) are coaxially mounted on the two ends of the transmission rod (6), the two slave synchronous wheels (2) are respectively mounted on the two rotating brackets (1), and the main synchronous wheel (5) and the slave synchronous wheel (2) on the same side are connected through a transmission belt (3).

6. The wind tunnel vibration test device suitable for high wind attack angles as claimed in claim 5, characterized in that: The middle of the slide rail (11) is provided with a long hole for the slider (10) to move up and down. The slide rail (11) is also provided with four slide grooves (17) extending up and down. The slider (10) is provided with four rows of pulleys (14) that are slidably matched with the slide grooves (17). The slider (10) is limited on the slide rail (11) by the pulleys (14).

7. The wind tunnel vibration test device suitable for high wind attack angles as claimed in claim 5, characterized in that: The fixed bracket comprises a symmetrically arranged triangular bracket (4), a support is provided on the bottom rod of the triangular bracket (4), and the two ends of the transmission rod (6) are rotatably mounted on the support respectively; the motor (7) is mounted on the bottom rod of one of the triangular brackets (4); and the slave synchronous wheel (2) is rotatably mounted on the vertex of the triangular bracket (4).

8. The wind tunnel vibration test device suitable for high wind attack angles as claimed in claim 7, characterized in that: A mounting platform (18) is provided on the side of the rotating bracket (1), and the slave synchronous wheel (2) is fixed on the mounting platform (18).

9. The wind tunnel vibration test device suitable for high wind attack angles according to claim 7, characterized in that: The rotating bracket (1) is a rectangular frame, and the slide rail (11) constitutes a part of the rectangular frame.

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