Suspension support for wind tunnel vortex-induced vibration test

Abstract

The utility model provides a suspension support for a wind tunnel vortex-induced vibration test. The suspension support comprises a base, a movable stand column, a supporting rod and a model fixing frame. The base comprises a bottom frame and a fixed stand column, the movable stand column is movably arranged on the bottom frame in the horizontal direction, the bottom frame, the fixed stand column and the movable stand column are each provided with a supporting rod in a sliding mode, the center position of the model fixing frame is used for installing a connecting bolt and a segment model, and the supporting rods are rotationally connected with the model fixing frame. During use, the inclination angle of the model fixing frame can be flexibly adjusted among the bottom frame, the fixed stand column and the movable stand column, so that the vibration condition of the segment model at different inclination angles can be simulated. The bottom of the stay cable section model is fixed on a rotating disc inside a wind tunnel, a tester can flexibly change the inclination angle of the stay cable section model in the wind tunnel and the wind deflection angle of incoming flow, the adjustable range is wider, and the stay cable section model is more convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind tunnel test technology, specifically relates to a wind tunnel vortex induced vibration vibration test suspension support. BACKGROUND

[0002] The wind-induced vibration problem of the stay cable has been a research hotspot in the field of bridge wind engineering. In recent years, with the continuous increase of the main span of the cable-stayed bridge in China, the length of the stay cable is also increasing. In order to ensure the safety of the bridge, it is necessary to carry out wind tunnel test on the stay cable to study the wind load and vortex-induced vibration. Before carrying out the vortex-induced vibration test of the stay cable segment model, the stay cable segment model needs to be fixed in the wind tunnel at a certain angle, and the tool support is usually used for fixing. In order to test the vibration of the segment model at different inclination angles and wind yaw angles, the posture of the segment model needs to be adjusted. The tool support in the prior art cannot flexibly change the inclination angle of the stay cable segment model, and the operation is inconvenient. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a wind tunnel vortex induced vibration vibration test suspension support, which aims at solving the problem that the tool support in the prior art cannot flexibly change the inclination angle of the stay cable segment model.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of providing a wind tunnel vortex induced vibration vibration test suspension support, which comprises:

[0005] The base comprises a bottom frame and a fixed column, and the fixed column is vertically arranged on the bottom frame.

[0006] The movable column is vertically arranged on the bottom frame and can move along the first horizontal direction, and the movable column and the fixed column are arranged at intervals in the first horizontal direction.

[0007] Three supporting rods are arranged on the bottom frame, the fixed column and the movable column respectively, wherein the supporting rod connected with the bottom frame can slide along the first horizontal direction, and the supporting rods connected with the fixed column and the movable column can slide along the vertical direction; the supporting rods are arranged along the second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction; and

[0008] The model fixing frame is a cuboid frame structure, and three right-angle edges of the model fixing frame are rotatably connected with three supporting rods respectively.

[0009] In a possible implementation manner, the fixed column and the movable column are respectively arranged at intervals in the second horizontal direction.

[0010] In a possible implementation, a fastening unit is detachably connected between the mobile column and the bottom frame, between the support rod and the bottom frame, between the support rod and the fixed column, and between the support rod and the mobile column, respectively.

[0011] In a possible implementation, the bottom frame is provided with a first sliding groove in a first horizontal direction, the support rod is provided with a second sliding groove in a second horizontal direction, and the fixed column and the mobile column are respectively provided with a third sliding groove in a vertical direction, and the first sliding groove, the second sliding groove, and the third sliding groove are T-shaped grooves.

[0012] In a possible implementation, the fastening unit comprises:

[0013] a fixed plate having a first connecting portion and a second connecting portion in an L shape perpendicular to each other;

[0014] two connecting bolts respectively penetrating the first connecting portion and the second connecting portion, and a threaded end of the connecting bolt being in sliding fit with the corresponding first sliding groove, second sliding groove, or third sliding groove; and

[0015] two locking nuts in threaded fit with one end of the fixed plate penetrated by the connecting bolt.

[0016] In a possible implementation, the wind tunnel vortex-induced vibration test suspension support further comprises a displacement detection assembly, and the displacement detection assembly comprises:

[0017] a detection support arranged on the model fixing frame; and

[0018] a displacement sensor arranged on the detection support.

[0019] In a possible implementation, the displacement detection assembly is provided in plurality.

[0020] In a possible implementation, the detection support is arranged outside a space enclosed by the model fixing frame.

[0021] In a possible implementation, a spring connecting support is arranged on the model fixing frame.

[0022] In a possible implementation, the support rod is rotationally connected to the model fixing frame through a hinge.

[0023] Compared with the prior art, the wind tunnel vortex-induced vibration test suspension support has the following beneficial effects:

[0024] The wind tunnel vortex-induced vibration vibration test suspension support provided by the utility model is fixed on the turntable of the wind tunnel when in use, the base comprises a bottom frame and a fixed stand column, the movable stand column is movably arranged on the bottom frame in the horizontal direction, one support rod is slidably arranged on the bottom frame, the fixed stand column and the movable stand column respectively, the central position of the model fixing frame is used for mounting connecting bolts and segment models, and the support rod is rotationally connected with the model fixing frame. When in use, the model fixing frame can be flexibly adjusted in the inclination angle thereof between the bottom frame, the fixed stand column and the movable stand column, so that the vibration condition of the segment model at different inclination angles is simulated. The base is fixed on the turntable inside the wind tunnel, the test personnel can flexibly change the inclination angle of the segment model of the cable-stayed bridge in the wind tunnel and the wind deflection angle of the incoming flow, the adjustable range is wider, and the use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A wind tunnel vortex-induced vibration vibration test suspension support provided by the utility model Figure 1 ;

[0026] Figure 2 A Figure 1 partial enlarged view of A part in the middle;

[0027] Figure 3 A wind tunnel vortex-induced vibration vibration test suspension support provided by the utility model Figure 2 ;

[0028] Figure 4 A Figure 3 partial enlarged view of B part in the middle;

[0029] Figure 5 A wind tunnel vortex-induced vibration vibration test suspension support provided by the utility model Figure 3 ;

[0030] Figure 6 It is the connection schematic drawing of fastening unit.

[0031] EXPLANATION OF REFERENCE NUMERALS:

[0032] 10, base; 11, bottom frame; 12, fixed stand column; 20, movable stand column; 30, support rod; 31, hinge; 40, model fixing frame; 41, spring connecting support; 42, connecting spring; 43, segment model; 431, baffle; 50, fastening unit; 51, fixed plate; 52, connecting bolt; 53, locking nut; 60, displacement detection assembly; 61, detection support; 62, displacement sensor. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments.

[0034] Please refer to Figures 1 to 6 , the utility model provides a kind of wind tunnel vortex vibration vibration test suspension support, which will be described below.

[0035] Please refer to Figures 1 to 5 The utility model embodiment provides a kind of wind tunnel vortex vibration vibration test suspension support, including base 10, mobile stand 20, support rod 30 and model fixed frame 40.Base 10 includes bottom frame 11 and fixed column 12, and fixed column 12 is vertically arranged in bottom frame 11;Mobile stand 20 is vertically arranged in bottom frame 11, and can be moved along the first horizontal direction, and mobile stand 20 and fixed column 12 are arranged at intervals in the first horizontal direction;Three support rods 30 are respectively arranged in bottom frame 11, fixed column 12 and mobile stand 20, wherein the support rod 30 connected with bottom frame 11 can slide along the first horizontal direction, and the support rod 30 connected with fixed column 12 and mobile stand 20 can slide along the vertical direction;Support rod 30 is arranged along the second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction;Model fixed frame 40 is the cuboid frame structure, and three right-angle edges of model fixed frame 40 are rotatably connected with three support rods 30.

[0036] Compared with prior art, the utility model embodiment provides a kind of wind tunnel vortex vibration vibration test suspension support, which has the beneficial effects that:

[0037] The utility model embodiment provides a kind of wind tunnel vortex vibration vibration test suspension support, which is fixed on the turntable of wind tunnel when using, and base 10 includes bottom frame 11 and fixed column 12, mobile stand 20 is movably arranged on bottom frame 11 along horizontal direction, and one support rod 30 is slidably arranged on bottom frame 11, fixed column 12 and mobile stand 20 respectively, and the central position of model fixed frame 40 is used for installing connecting bolt 52 and segment model 43, and support rod 30 is rotatably connected with model fixed frame 40.When using, model fixed frame 40 can be flexibly adjusted with the inclination angle between bottom frame 11, fixed column 12 and mobile stand 20, so as to simulate the vibration condition of segment model 43 at different inclination angles.The turntable is fixed in the interior of wind tunnel, and test personnel can flexibly change the inclination angle of cable-stayed segment model 43 in wind tunnel and the wind deflection angle of flow, and the adjustable range is wider, and it is more convenient to use.

[0038] The bottom frame 11, the fixed column 12, the movable column 20, the support rod 30 and the model fixing frame 40 are all made of aluminum alloy profiles. The aluminum alloy profiles are convenient to purchase and simple to manufacture and assemble. The profiles can be detachably connected through connecting members such as bolts, which facilitates disassembly and assembly according to needs, and makes it more convenient and fast to enter and exit the wind tunnel laboratory.

[0039] The three right-angle edges of the model fixing frame 40 are rotationally connected to the three support rods 30, respectively. When the position adjustment is completed, the support rods 30 are fixed through fasteners. The segment model 43 is hung at the center position of the model fixing frame 40 through the eight connecting springs 42. When the model fixing frame 40 changes its own inclination angle, first, the fasteners for fixing the support rods 30 and the movable column 20 are loosened so that they can move. The model fixing frame 40 is rotated, at this time, the support rods 30 arranged on the fixed column 12 slide up and down, the support rods 30 arranged on the bottom frame 11 slide horizontally, and the movable column 20 moves together with the model fixing frame 40. After the position adjustment is completed, the fasteners are tightened to fix the support rods 30 and the movable column 20.

[0040] Please refer to Figure 1 , Figure 3 and Figure 5 In some possible embodiments, the fixed column 12 and the movable column 20 are respectively provided with a plurality of columns along the second horizontal direction, which helps to balance the force of the parts and makes the overall structure of the support more stable.

[0041] Please refer to Figure 2 , Figure 4 and Figure 6 In some possible embodiments, the movable column 20 and the bottom frame 11, the support rod 30 and the bottom frame 11, the support rod 30 and the fixed column 12, and the support rod 30 and the movable column 20 are respectively detachably connected with fastening units 50. When the support rod 30 and the movable column 20 reach the specified position, they are fixed through the fastening units 50. The fastening units 50 can be common connecting members such as bolts and straps.

[0042] Please refer to Figures 1 to 3 In some possible embodiments, the bottom frame 11 is provided with a first sliding groove along the first horizontal direction, the support rod 30 is provided with a second sliding groove along the second horizontal direction, and the fixed column 12 and the movable column 20 are respectively provided with a third sliding groove along the vertical direction. The first sliding groove, the second sliding groove and the third sliding groove are all T-shaped grooves, and the first sliding groove, the second sliding groove and the third sliding groove can be directly formed by the metal profiles themselves.

[0043] Please refer to Figure 2 and Figure 6In some possible embodiments, the fastening unit 50 comprises a fixing plate 51, a connecting bolt 52 and a locking nut 53. The fixing plate 51 has a first connecting part and a second connecting part which are vertically L-shaped and plate-shaped, and can be attached to the surface of a profile such as the support rod 30 or the bottom frame 11. The two connecting bolts 52 are respectively arranged in the first connecting part and the second connecting part, and the nut end of the connecting bolt 52 is in sliding fit with the corresponding first sliding groove, second sliding groove or third sliding groove. When the locking nut 53 is loosened, the connecting bolt 52 can be moved along the sliding groove, and when the locking nut 53 is tightened, the connecting bolt 52 and the profile are fixed as a whole.

[0044] Referring to Figures 1 to 3 In some possible embodiments, the wind tunnel vortex-induced vibration test suspension support further comprises a displacement detection assembly 60, which comprises a detection support 61 and a displacement sensor 62. The detection support 61 is movably arranged on the model fixing frame 40 through the fastening unit 50 described above, and the displacement sensor 62 is arranged on the detection support 61. The displacement sensor 62 can be a laser displacement meter, and the displacement sensor 62 and the detection support 61 are both arranged behind the wind tunnel flow direction and will not interfere with the flow.

[0045] Referring to Figures 1 to 3 In some possible embodiments, the displacement detection assembly 60 is provided in plurality and can change the installation position as needed.

[0046] Referring to Figures 1 to 3 In some possible embodiments, the detection support 61 is arranged outside the space enclosed by the model fixing frame 40 and will not interfere with the wind load received by the stage model. As shown in Figure 4 The end of the segment model 43 is connected with a baffle 431, the baffle 431 vibrates with the segment model 43, and the detection end of the laser displacement meter faces the baffle 431. The connecting spring 42 can be suspended in a manner of orthogonal cross type or orthogonal cross X type.

[0047] Referring to Figure 5 In some possible embodiments, the model fixing frame 40 is provided with a spring connecting support 41, the spring connecting support 41 can change the installation position flexibly as needed, and the spring connecting support 41 is provided with a connecting hole for connecting the hook of the connecting spring 42.

[0048] Referring to Figure 3 and Figure 4 In some possible embodiments, the support rod 30 is rotationally connected with the model fixing frame 40 through the hinge 31, and the hinge 31 can be arranged in plurality along the length direction of the support rod 30.

[0049] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like, should be interpreted broadly, for example, can be connected, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs.

[0050] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0052] The above is a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0053] It can be understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments, and the specific content of each combined embodiment will not be described here. After the description, it can be considered that the present application specification has recorded each combined embodiment, and can support different combined embodiments.

[0054] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspension bracket for wind tunnel vortex-induced vibration measurement tests, characterized in that, include: The base (10) includes a bottom frame (11) and a fixed column (12), wherein the fixed column (12) is vertically disposed on the bottom frame (11). The movable column (20) is vertically installed on the bottom frame (11) and can move along the first horizontal direction. The movable column (20) and the fixed column (12) are spaced apart in the first horizontal direction. Three support rods (30) are respectively provided on the bottom frame (11), the fixed column (12) and the movable column (20), wherein the support rod (30) connected to the bottom frame (11) can slide along the first horizontal direction, and the support rod (30) connected to the fixed column (12) and the movable column (20) can slide along the vertical direction; the support rod (30) extends along the second horizontal direction, which is perpendicular to the first horizontal direction; as well as The model fixing frame (40) is a rectangular frame structure, and three right-angled sides of the model fixing frame (40) are rotatably connected to the three support rods (30).

2. The suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 1, characterized in that, The fixed column (12) and the movable column (20) are respectively arranged in multiple intervals along the second horizontal direction.

3. The suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 1, characterized in that, Fastening units (50) are detachably connected between the movable column (20) and the bottom frame (11), between the support rod (30) and the bottom frame (11), between the support rod (30) and the fixed column (12), and between the support rod (30) and the movable column (20).

4. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 3, characterized in that, The bottom frame (11) has a first groove along the first horizontal direction, the support rod (30) has a second groove along the second horizontal direction, and the fixed column (12) and the movable column (20) have a third groove along the vertical direction. The first groove, the second groove and the third groove are all T-shaped grooves.

5. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 4, characterized in that, The fastening unit (50) includes: The fixing plate (51) has a first connecting part and a second connecting part that are perpendicular to each other and form an L-shape; Two connecting bolts (52) are respectively inserted into the first connecting part and the second connecting part, and the nut end of the connecting bolt (52) is slidably engaged with the corresponding first sliding groove, second sliding groove or third sliding groove; and Two locking nuts (53) are threadedly engaged with one end of the corresponding connecting bolt (52) through the fixing plate (51).

6. The suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 1, characterized in that, The wind tunnel vortex-induced vibration measurement test suspension bracket further includes a displacement detection component (60), which includes: The detection bracket (61) is disposed on the model fixing frame (40); and A displacement sensor (62) is mounted on the detection bracket (61).

7. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 6, characterized in that, The displacement detection component (60) has multiple components.

8. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 6, characterized in that, The detection bracket (61) is located outside the space enclosed by the model fixing frame (40).

9. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 1, characterized in that, The model fixing frame (40) is provided with a spring connecting bracket (41).

10. A suspension bracket for wind tunnel vortex-induced vibration measurement test according to claim 1, characterized in that, The support rod (30) is rotatably connected to the model fixing frame (40) via a hinge (31).

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