A wind tunnel test device for bending-torsion coupling vibration without additional mode

Abstract

The present application relates to the technical field of bridge wind tunnel test device, and particularly relates to a bending-torsion coupling vibration wind tunnel test device without additional mode, which comprises a test model, an additional mode adjuster, a vertical bending adjuster, a torsion attack angle adjuster and a rigid rod, the rigid rod is arranged through the test model, the torsion center line of the test model and the axis of the rigid rod are arranged in line, the additional mode adjuster, the vertical bending adjuster and the torsion attack angle adjuster are arranged on the rigid rod, the additional mode adjuster is used for eliminating the additional mode of the test model, the vertical bending adjuster is used for adjusting the vertical bending vibration frequency of the test model, and the torsion attack angle adjuster is used for adjusting the torsion vibration frequency and the attack angle of the test model. The present application optimizes the existing bridge bending-torsion coupling section model wind tunnel test device, the test model can keep without additional mode in the test process through the additional mode adjuster, so that the precision and stability of the wind tunnel test are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge wind tunnel test device, and particularly relates to a bending-torsion coupling vibration wind tunnel test device without additional mode. BACKGROUND

[0002] Bridge section model wind tunnel test is one of important means for bridge wind resistance research, and more accurate and effective wind tunnel test is beneficial to more scientific research and analysis of wind-induced vibration response mechanism.

[0003] Bridge section model wind tunnel test is mainly aimed at studying vertical bending and torsional mode of the bridge, and other modes occurring under wind tunnel test except vertical bending and torsion are called additional modes. In the previous test device, vertical springs at both ends of the test model in the span direction are two pairs of independent parts, which means that the vertical displacements at both sides of the test model in the span direction cannot be guaranteed to be consistent in the process of the test, thereby additional modes are generated, which will affect the accuracy of the wind tunnel test.

[0004] Due to the existence of additional modes, large errors are often generated in the test results, researchers have made improvements on the previous test device, and the vertical displacements at both sides of the test model in the span direction are made consistent by attaching weights on the higher side of the model in the span direction, so as to achieve the purpose of eliminating additional modes. However, this method is often more complex to operate, different weights need to be attached for different tests, and it is difficult to accurately adjust the vertical displacements at both sides of the test model in the span direction, which affects the ease of operation and accuracy of the test.

[0005] Therefore, it is urgent to design a more optimal bending-torsion coupling vibration wind tunnel test device without additional modes. SUMMARY

[0006] In order to solve the above problems, the present application provides a bending-torsion coupling vibration wind tunnel test device without additional modes, and the specific technical solutions are as follows:

[0007] A bending-torsion coupling vibration wind tunnel test device without additional modes, comprising a test model, an additional mode adjuster, a vertical bending adjuster, a torsion attack angle adjuster and a rigid rod, the rigid rod is arranged through the test model, the torsion center line of the test model and the axis of the rigid rod are arranged in line, the additional mode adjuster, the vertical bending adjuster and the torsion attack angle adjuster are arranged on the rigid rod, the additional mode adjuster comprises a horizontal arm, a vertical arm, a connecting rod and a top fixed support, one end of the horizontal arm is rotatably connected with the rigid rod, the other end is rotatably connected with the vertical arm, the end of the vertical arm away from the horizontal arm is connected with the connecting rod, the connecting rod is arranged horizontally and the top fixed support is rotatably arranged on the connecting rod;

[0008] The vertical bending adjuster is used to adjust the vertical bending vibration frequency of the test model.

[0009] The torsion attack angle adjuster is used to adjust the torsion vibration frequency and attack angle of the test model.

[0010] Preferably, the bending-torsion coupling vibration wind tunnel test device further comprises a first connecting member, the first connecting member is connected to the rigid rod through a rotating assembly, the rotating assembly comprises a first bearing and a bearing anchor, the first bearing is arranged on the rigid rod, the bearing anchor is arranged on the first bearing, and the bearing anchor is connected to the first connecting member and the vertical bending adjuster.

[0011] The torsion attack angle adjuster comprises a second connecting member, the second connecting member is adjustably arranged on the rigid rod along the length direction of the rigid rod, the first connecting member is located between the test model and the second connecting member, the torsion center line of the test model and the axis of the rigid rod are arranged in line, the first connecting member is connected to the vertical bending adjuster, the vertical bending adjuster and the second connecting member are connected to the torsion attack angle adjuster, and the vertical bending adjuster is connected to the external supporting device.

[0012] Preferably, the vertical bending adjuster comprises a vertical bending beam and an adjusting member adjustably arranged along the length direction of the vertical bending beam, the end of the vertical bending beam is connected to the first connecting member, and the adjusting member is connected to the external supporting device.

[0013] Preferably, the vertical bending beam is a vertical bending steel beam, a row of through holes are arranged on the vertical bending steel beam along the length direction of the vertical bending steel beam, and the through holes are matched with the adjusting member.

[0014] Preferably, the adjusting member comprises a bolt anchor and a triangular fixed support arranged on the bolt anchor, the bolt anchor is used to adjust the position of the adjusting member along the length direction of the vertical bending steel beam through a bolt and a nut, and the triangular fixed support is used to connect the external supporting device.

[0015] Preferably, the torsion attack angle adjuster further comprises a torsion beam and an adjusting rod, one end of the torsion beam is fixedly arranged on the first connecting member, the other end of the torsion beam is adjustably connected to the adjusting rod, and the end of the adjustably connected rod, which is away from the torsion beam, is fixedly connected to the second connecting member.

[0016] Preferably, the torsion beam is a torsion steel strip, a plurality of connecting holes are arranged on the torsion steel strip along the length direction of the torsion steel strip, and the adjusting rod is a threaded rod, and the end of the threaded rod is detachably arranged in one of the connecting holes of the torsion steel strip.

[0017] Preferably, the threaded rod is provided with a scale value along the length direction of the threaded rod, and the scale value is used to assist in adjusting the initial attack angle value of the test model.

[0018] Preferably, a second bearing is arranged between the cross arm and the rigid rod, and the second bearing is used to realize the rotatable connection between the cross arm and the rigid rod.

[0019] A third bearing is arranged between the connecting rod and the top fixed support, and the third bearing is used to realize the rotatable connection between the connecting rod and the top fixed support.

[0020] A fourth bearing is arranged between the cross arm and the vertical arm, and the fourth bearing is used to realize the rotatable connection between the cross arm and the vertical arm.

[0021] The technical scheme of the present application has the following beneficial effects:

[0022] (1) The present application adopts a relatively innovative structure, has a wide application range, and can be applied to various wind field vibrations such as forced vibration and self-excited vibration. The present application mainly optimizes the bridge bending-torsion coupling segment model wind tunnel test device, has the characteristics of separately adjustable vertical bending stiffness and torsional stiffness, relatively low cost, and the like compared with the previous bridge wind tunnel test device, and through the interaction between the two groups of parallel cross arms and vertical arms and the connecting rod therebetween, the test model can maintain no additional mode during the test, thereby improving the precision and stability of the wind tunnel test.

[0023] (2) The present application uses a vertical bending steel beam to replace the existing vertical spring to provide vertical stiffness, and uses a torsional steel strip to replace the existing chain wheel or hub to provide torsional stiffness, and the structure is relatively novel. The previous device often needs to be coupled and adjusted in terms of vertical bending and torsional frequency, while the device of the present application adjusts the vertical bending stiffness and the torsional stiffness of the system by adjusting the position of the triangular fixed support on the vertical bending steel beam and adjusting the position of the threaded rod on the torsional steel strip, respectively, thereby adjusting the vertical bending frequency and the torsional frequency of the system, respectively, and the frequency adjustment range of the previous device is more flexible.

[0024] (3) The operation of adjusting the vertical bending and vibration frequency of the device of the present application is more convenient, the components are relatively simple to manufacture, the manufacturing cost is relatively low, and the applicability is wider. The previous wind tunnel test device mainly adjusts the vertical bending and torsional vibration frequency by replacing the hub and the fiber rope, which is not only cumbersome to operate, but also expensive to manufacture multiple types of hubs.

[0025] (4) The device of the present application strengthens the relationship between the two ends of the test model in the spanwise direction through the synergistic effect of the cross arm, the vertical arm and the connecting rod, ensures that the two ends of the test model always have the same vertical displacement in the vibration process, and further ensures that the test model does not have additional modes, thereby obtaining more stable and higher-precision wind tunnel test results. In the previous test device, the vertical springs at the two ends of the test model in the longitudinal direction are two pairs of independent parts, which means that the two ends of the test model in the spanwise direction cannot maintain the same vertical displacement during the test.

[0026] In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the application and are incorporated herein in their entirety, and they show by way of illustration the specific embodiments of the application, and are not intended to limit the application unless specified otherwise. In the drawings:

[0028] Figure 1 is a structural schematic diagram of the bending-torsion coupling vibration wind tunnel test device in the preferred embodiment of the present application;

[0029] Figure 2 is a motion schematic diagram of the extra modal adjuster in Figure 1

[0030] Figure 3 is a structural schematic diagram of the vertical bending steel beam, triangular fixed support and bolt anchorage in Figure 1

[0031] Figure 4 is a structural schematic diagram of the torsion attack angle adjuster, rigid rod and vertical bending steel beam combination in Figure 1

[0032] Figure 5 is a principle schematic diagram of the extra modal adjuster in the preferred embodiment of the present application.

[0033] In the drawings: 1 - test model; 2 - rigid rod; 3 - first bearing; 4 - bearing anchorage; 5 - vertical bending steel beam; 6 - bolt anchorage; 7 - triangular fixed support; 8 - first connecting piece; 9 - torsion steel strip; 10 - threaded rod; 11 - second connecting piece; 12 - second bearing; 13 - cross arm; 14 - vertical arm; 15 - connecting rod; 16 - third bearing; 17 - top fixed support; 18 - fourth bearing. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways as limited and covered by the claims.

[0035] Embodiment:

[0036] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 ​​​The embodiment discloses a no-additional-mode bending-torsion coupling vibration wind tunnel test device which comprises a test model 1, an additional mode adjuster, a vertical bending adjuster, a torsion attack angle adjuster and a rigid rod 2, the rigid rod 2 is arranged through the test model 1, the torsion center line of the test model 1 and the axis of the rigid rod 2 are arranged in a same line, the additional mode adjuster, the vertical bending adjuster and the torsion attack angle adjuster are arranged on the rigid rod 2, the additional mode adjuster comprises a horizontal arm 13, a vertical arm 14, a connecting rod 15 and a top fixed support 17, one end of the horizontal arm 13 is rotatably connected to the rigid rod 2, the other end is rotatably connected to the vertical arm 14, the vertical arm 14 is fixedly connected to the connecting rod 15 away from the horizontal arm 13, the connecting rod 15 is horizontally arranged and the top fixed support 17 is rotatably arranged on the connecting rod 15.

[0037] It should be noted that the connecting rod 15 in the embodiment is kept horizontal and can rotate freely relative to the top fixed support 17, meanwhile, the top fixed support 17 restricts the horizontal movement of the connecting rod 15. The two vertical arms 14 are parallel to each other and are fixedly connected to the connecting rod 15 respectively, and the two vertical arms 14 drive the connecting rod 15 to rotate when acting, and the connecting rod 15 restricts the parallel and synchronous movement of the two vertical arms 14.

[0038] Further, the horizontal arm 13, the vertical arm 14 and the connecting rod 15 can ensure that the test model 1 always has the same vertical displacement at the two ends during the vibration process, so that the test model 1 does not generate additional modes other than the vertical bending mode and the torsion mode under the action of the incoming flow.

[0039] Further, the device further comprises a first connecting piece 8, the first connecting piece 8 is connected to the rigid rod 2 through a rotating assembly, the rotating assembly comprises a first bearing 3 and a bearing anchor 4, the first bearing 3 is arranged on the rigid rod 2, the bearing anchor 4 is arranged on the first bearing 3, and the bearing anchor 4 is connected to the first connecting piece 8 and the vertical bending adjuster.

[0040] Further, the torsion attack angle adjuster comprises a second connecting piece 11, the second connecting piece 11 is adjustably arranged on the rigid rod 2 along the length direction of the rigid rod 2 (in an embodiment, a through hole is formed in the second connecting piece 11, and the second connecting piece 11 is detachably connected by screwing the through hole, and the second connecting piece 11 is fixedly arranged on the rigid rod 2 by screwing during the wind tunnel test), the first connecting piece 8 is located between the test model 1 and the second connecting piece 11, the torsion center line of the test model 1 and the axis of the rigid rod 2 are arranged in a same line, the first connecting piece 8 is connected to the vertical bending adjuster, the vertical bending adjuster and the second connecting piece 11 are connected to the torsion attack angle adjuster, and the vertical bending adjuster is connected to an external supporting device.

[0041] It should be noted that the first connecting piece 8 in the embodiment is a triangular connecting piece, the two ends of which are respectively connected with the vertical bending adjuster and the torsion attack angle adjuster, and the body of the triangular connecting piece is rotatably connected with the rigid rod 2 through a rotating assembly; the second connecting piece 11 in the embodiment is a long strip connecting piece, which is adjustably connected with the rigid rod 2.

[0042] The vertical bending adjuster is used to adjust the vertical bending vibration frequency of the test model 1; preferably, the vertical bending adjuster in the embodiment comprises a vertical bending beam and an adjusting piece slidingly arranged along the length direction of the vertical bending beam, the end of the vertical bending beam is connected with the first connecting piece 8, and the adjusting piece is connected with an external supporting device.

[0043] Preferably, the vertical bending beam is a vertical bending steel beam 5, which provides vertical stiffness for the test model 1, limits the longitudinal and transverse displacement of the test model 1, and further ensures that the test model 1 does not vibrate laterally except vertically during vibration. Further, a row of through holes is arranged on the vertical bending steel beam 5 along the length direction thereof, and the through holes match the adjusting piece. Preferably, the adjusting piece in the embodiment comprises a bolt anchoring piece 6 and a triangular fixed support 7 arranged on the bolt anchoring piece, the bolt anchoring piece 6 adjusts the position of the adjusting piece along the length direction of the vertical bending steel beam 5 through a bolt, a nut and a through hole, adjusts the effective length of the vertical bending steel beam 5, and further adjusts the vertical stiffness of the device. At the same time, after the vertical bending steel beam 5 is fixed through the bolt anchoring piece 6 and the triangular fixed support 7, the longitudinal and transverse displacement of the test model 1 is limited, and it is ensured that the test model does not vibrate laterally except vertically during vibration. The triangular fixed support 7 is used to connect the external supporting device.

[0044] The torsion attack angle adjuster is used to adjust the torsion vibration frequency and attack angle of the test model 1; preferably, the torsion attack angle adjuster in the embodiment further comprises a torsion beam and an adjusting rod, one end of the torsion beam is fixedly arranged on the first connecting piece 8, the other end is adjustably connected with the adjusting rod, and the end of the adjustably connecting rod away from the torsion beam is fixedly connected with the second connecting piece 11.

[0045] Preferably, the torsion beam is a torsion steel bar 9, a plurality of connecting holes are formed on the torsion steel bar 9 along the length direction of the torsion steel bar 9, the adjusting rod is a threaded rod 10, the end of the threaded rod 10 is detachably connected with the connecting holes through nuts, and the distance between the torsion steel bar 9 and the second connecting piece 11 is adjusted, the threaded rod 10 is connected with different connecting holes, and the effective length of the torsion steel bar 9 is adjusted. In the embodiment, one end of the torsion steel bar 9 is connected with the vertical bent steel beam 5 through the first connecting piece 8, and the other end is connected with the second connecting piece 11 through the threaded rod 10, so that the second connecting piece 11 is synchronous with the torsion angle of the test model 1, and then the linear stiffness of the torsion steel bar 9 can be converted into torsional stiffness. Since the second connecting piece 11 is fixedly connected with the rigid rod 2, the second connecting piece 11 is synchronous with the torsion angle of the test model 1, the threaded rod 10 is connected with different connecting holes of the torsion steel bar 9, the effective length of the torsion steel bar 9 can be adjusted, and then the torsional stiffness of the device can be adjusted.

[0046] Further, when the vertical bending stiffness and the torsional stiffness of the device in the embodiment are adjusted, the test configuration of the wind tunnel test device is determined, the vertical bending steel beam 5 and the torsion steel bar 9 maintain constant vertical bending stiffness and torsional stiffness, the mass is constant in the whole coupling vibration process of the device, the vertical translational frequency and the frequency of rotation around the center of the rigid rod 2 are also constant, and then the device in the embodiment completes the adjustment of the vibration frequency.

[0047] Preferably, the threaded rod is provided with a scale value along the length direction of the threaded rod, and the scale value is used for assisting in adjusting the initial attack angle value of the test model 1. In the embodiment, the effective length of the threaded rod 10 can be continuously and quantitatively adjusted, the second connecting piece 11 is rotated, the test model 1 is continuously rotated by the same angle, and then the initial attack angle can be more conveniently and accurately adjusted.

[0048] In the embodiment, a plurality of connecting holes or through holes are arranged between the vertical bending steel beam 5 and the adjusting piece and between the torsion steel bar 9 and the threaded rod 10, so that the effective lengths of the vertical bending steel beam 5 and the torsion steel bar 9 are independently and continuously adjustable, the vertical bending stiffness and the torsional stiffness are independently and continuously adjustable, and then the vertical bending and torsional vibration frequencies can be more conveniently and independently and continuously adjusted.

[0049] Preferably, the second bearing 12 is arranged between the horizontal arm 13 and the rigid rod 2, and the second bearing 12 is used for realizing the rotatable connection between the horizontal arm 13 and the rigid rod 2.

[0050] Preferably, the third bearing 16 is arranged between the connecting rod 15 and the top fixed support 17, and the third bearing 16 is used for realizing the rotatable connection between the connecting rod 15 and the top fixed support 17.

[0051] Preferably, a fourth bearing 18 is provided between the horizontal arm 13 and the vertical arm 14, and the fourth bearing 18 is used to realize the rotatable connection between the horizontal arm 13 and the vertical arm 14.

[0052] Furthermore, such as Figure 5 The schematic diagram shown illustrates the principle of the additional mode conditioner. The principle of the additional mode conditioner in eliminating the additional modes of experimental model 1 is as follows:

[0053] Dashed lines represent the initial positions of the relevant structures of the device, dotted dashed lines represent auxiliary lines, and solid lines represent the positions of the relevant structures of the device under the influence of the incoming flow. Figure 5 This example illustrates the principle using only one device position state and does not represent that there is only one actual device position state.

[0054] Wherein, θ1 is the angle between the vertical arm 14 and the negative z-axis, θ2 is the angle between the horizontal arm 13 (CE side) and the positive x-axis, θ3 is the angle between the horizontal arm 13 (DF side) and the positive x-axis, R1 is the length of the horizontal arm 13 (CE side), R2 is the length of the horizontal arm 13 (DF side), h1 is the vertical projection of the horizontal arm 13 (CE side), h2 is the vertical projection of the horizontal arm 13 (DF side), L1 is the projection length of the horizontal arm 13 (CE side) on the x-axis, and L2 is the projection length of the horizontal arm 13 (DF side) on the x-axis.

[0055] Points A, B, C, D, E, and F are the connection nodes of the related structures. C', D', E', and F' are the initial positions of C, D, E, and F. Point G is the intersection of the z-axis auxiliary line drawn from point E and the x-axis auxiliary line drawn from point C. Point H is the intersection of the z-axis auxiliary line drawn from point F and the x-axis auxiliary line drawn from point D.

[0056] Specifically, the connecting rod 15 is fixedly connected to the two vertical arms 14 in parallel, and the connecting rod 15 constrains the parallel and synchronous movement of the two vertical arms 14, so as... Figure 3 As shown, under the influence of the incoming flow, the rotation angle of both vertical arms 14 is θ1. Furthermore, since the connecting rod 15 remains horizontal under the constraint of the top fixed support 17, then... Figure 3 Points C and D have the same x and z coordinates, except for their y coordinates. Since the longitudinal and lateral displacements of the experimental model 1 are restricted by the vertical bending steel beam 5, EE' and FF' are parallel to the z-axis. Therefore, the x-axis coordinates of points E and F are the same. Hence, the projection length L1 of the transverse arm 13 (CE side) on the x-axis is equal to the projection length L2 of the transverse arm 13 (DF side) on the x-axis.

[0057] Further, the length R1 of the cross arm 13 (CE side) and the length R2 of the cross arm 13 (DF side) are equal, and EG is perpendicular to CG, and FH is perpendicular to DH, so the vertical projection h1 of the cross arm 13 (CE side) is equal to the vertical projection h2 of the cross arm 13 (DF side), and θ2 is equal to θ3, and it is easy to obtain that the z coordinates of points E and F are equal, which also represents that the vertical displacements of the two ends of the test model 1 in the spanwise direction are equal, thereby satisfying the test condition of no additional mode.

[0058] In summary, the device of the present application has extremely wide application range, and compared with the previous wind tunnel test device, the structure is novel, the operation is convenient, the initial attack angle, the vertical bending and the torsional vibration frequency are continuously adjustable, and the influence of the additional mode on the test model is eliminated through the additional mode adjuster, and the accuracy of the wind tunnel test result is further improved.

[0059] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wind tunnel test apparatus for bending-torsional coupled vibration without additional modes, characterized in that, The test model (1), an additional modal adjuster, a vertical bending adjuster, a torsional angle of attack adjuster, and a rigid rod (2) are included. The rigid rod (2) is set through the test model (1). The torsional center line of the test model (1) and the axis of the rigid rod (2) are set collinearly. The rigid rod (2) is provided with an additional modal adjuster, a vertical bending adjuster, and a torsional angle of attack adjuster. The additional modal adjuster includes a horizontal arm (13), a vertical arm (14), a connecting rod (15), and a top fixed support (17). One end of the horizontal arm (13) is rotatably connected to the rigid rod (2), and the other end is rotatably connected to the vertical arm (14). The end of the vertical arm (14) away from the horizontal arm (13) is connected to the connecting rod (15). The connecting rod (15) is set horizontally and is rotatably provided with a top fixed support (17). The vertical bending adjuster is used to adjust the vertical bending vibration frequency of the test model (1); The torsional angle of attack adjuster is used to adjust the torsional vibration frequency and angle of attack of the test model (1); The bending-torsional coupling vibration wind tunnel test device also includes a first connecting member (8), which is connected to the rigid rod (2) through a rotating assembly. The rotating assembly includes a first bearing (3) and a bearing anchor (4). The first bearing (3) is disposed on the rigid rod (2), and the bearing anchor (4) is disposed on the first bearing (3). The bearing anchor (4) connects the first connecting member (8) and the vertical bending adjuster. The torsional angle of attack adjuster includes a second connector (11), which is adjustablely mounted on the rigid rod (2) along the length of the rigid rod (2). The first connector (8) is located between the test model (1) and the second connector (11). The first connector (8) is connected to the vertical bending adjuster. The vertical bending adjuster and the first connector (8) are connected to the torsional angle of attack adjuster. The vertical bending adjuster is connected to an external support device. The vertical bending adjuster includes a vertical bending beam and an adjustable member that is adjustable along the length of the vertical bending beam. The end of the vertical bending beam is connected to a first connecting member (8), and the adjusting member is connected to an external support device. The torsion angle of attack adjuster also includes a torsion beam and an adjusting rod. One end of the torsion beam is fixedly mounted on the first connecting member (8), and the other end is adjustablely connected to the adjusting rod. The end of the adjusting rod away from the torsion beam is fixedly connected to the second connecting member (11). The torsion beam is a torsion steel bar (9), and the torsion steel bar (9) has multiple connecting holes along its own length direction. The adjusting rod is a threaded rod (10), and the end of the threaded rod (10) is detachably set on one of the connecting holes of the torsion steel bar (9). The threaded rod has a scale value along its own length direction, and the scale is used to help adjust the initial angle of attack value of the test model (1).

2. The bending-torsional coupled vibration wind tunnel test apparatus according to claim 1, characterized in that, The vertical curved beam is a vertical curved steel beam (5), and a row of through holes is provided on the vertical curved steel beam (5) along its own length direction. The through holes are matched with the adjusting member.

3. The bending-torsional coupled vibration wind tunnel test apparatus according to claim 2, characterized in that, The adjusting component includes a bolt anchor (6) and a triangular fixed support (7) provided on the bolt anchor (6). The bolt anchor (6) uses bolts and nuts to adjust the position of the adjusting component along the length of the vertical curved steel beam (5). The triangular fixed support (7) is used to connect an external support device.

4. The bending-torsional coupled vibration wind tunnel test apparatus according to claim 1, characterized in that, A second bearing (12) is provided between the cross arm (13) and the rigid rod (2), and the second bearing (12) is used to realize the rotatable connection between the cross arm (13) and the rigid rod (2); A third bearing (16) is provided between the connecting rod (15) and the top fixed support (17), and the third bearing (16) is used to realize the rotatable connection between the connecting rod (15) and the top fixed support (17). A fourth bearing (18) is provided between the horizontal arm (13) and the vertical arm (14), and the fourth bearing (18) is used to realize the rotatable connection between the horizontal arm (13) and the vertical arm (14).

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