Bridge wind vibration active control wing plate capable of being twisted in two directions based on flexible membrane structure
By installing a two-way torsional wind vibration active control wing plate based on a flexible membrane structure on the bridge, the shape of the flexible membrane structure is adjusted in real time by using the coordination of the rotating shaft, control rod and connecting rod to provide reverse torque, the problem of wind-induced vibration of large-span bridges is solved, and better wind resistance and lightweight structure are achieved.
Patent Information
- Application Number
- CN202421231081.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Large-span flexible cable system bridges are prone to vortex vibration and flutter problems under the action of wind. Traditional passive control measures are approaching the limit, and the rigid active control wing plates have problems such as large weight, inflexibility, inconvenient installation and high inertia forces.
The wind vibration active control wing plate of a bidirectional torsionable bridge based on a flexible membrane structure is adopted. Through the cooperation of the rotating shaft, control rod and connecting rod, the rotation angle of the control rod is changed, and the torsion angle of the flexible membrane structure is changed, providing a torque opposite to the torsion direction of the bridge, and suppressing bridge vibration.
It realizes real-time adjustment of the shape of the flexible membrane structure according to the bridge vibration, provides reverse torque, reduces the torsional deformation of the bridge, and improves wind resistance. It has a light structure, is convenient to disassemble, and has a small inertia force controlled by vibration.
Smart Images
Figure CN222744767U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge engineering, and in particular to a bidirectional torsion bridge wind vibration active control wing plate based on a flexible membrane structure. Background Art
[0002] At present, long-span flexible cable bridges are widely used at home and abroad, and a large number of examples have been built. However, in this type of bridge, due to its special structural characteristics, the vortex vibration and flutter problem of the bridge has become one of the key issues in the wind-resistant design of the bridge.
[0003] As the span of bridges increases, traditional passive control measures have reached their limits in improving the wind resistance of bridges, and most passive control measures find it difficult to consider multiple adverse wind-induced vibration effects at the same time.
[0004] Active control is a technology based on the bridge vibration data acquisition system. It analyzes the vibration state of the bridge in real time and uses feedback algorithms to optimize control information, and transmits control instructions to the control system for adjustment. The data acquisition system, analysis system and control system can monitor and analyze the impact of wind load vibration on the bridge in real time, and make feedback adjustments in time, so that the shape of the membrane structure wing plate changes in real time. Compared with traditional passive control measures, active control technology has a wider range of applicability and better control effect. The current active control wing plate is mainly made of rigid materials (such as steel). It only suppresses the wind-induced vibration of the bridge by rotating a single or multiple wing plates on both sides of the bridge. The control effect is relatively simple, the weight is heavy, inflexible and inconvenient to install, and it has a large inertial force. Utility Model Content
[0005] In view of the technical problems existing in the rigid active control wing panels mentioned above, a bidirectional torsion bridge wind-vibration active control wing panel based on a flexible membrane structure is provided. Through the action of a rotating shaft, a control rod and a connecting rod, the rotation angle of the control rod is changed, thereby changing the torsion angle of the membrane structure to adapt to the torsional deformation caused by the vibration of the bridge, and providing a torque opposite to the torsion direction of the bridge, thereby achieving the effect of suppressing the vibration of the bridge.
[0006] The technical means adopted by the utility model are as follows:
[0007] A bidirectional torsion bridge wind vibration active control wing plate based on a flexible membrane structure, comprising a row of fixed rods arranged at intervals and a flexible membrane structure located above the fixed rods;
[0008] A rotating shaft is rotatably mounted on the top of the fixed rod, two control rods are mounted on the rotating shaft, and the bottom of the control rod is fixedly mounted on the rotating shaft; the rotating shaft is provided with a corresponding driving motor for driving the rotating shaft to rotate, thereby driving the two control rods to rotate;
[0009] On a row of the fixed rods, among the control rods located on the same side, two adjacent control rods are connected by the connecting rod installed on the top, and the connecting rod is rotatably connected to the control rods at both ends through a spherical joint; the edges on both sides of the flexible membrane structure are respectively installed on the connecting rods on both sides.
[0010] Furthermore, by controlling the operation of the driving motors on the fixing rods respectively, the rotation angles of the rotating shafts and the control rods on the fixing rods can be controlled respectively, thereby achieving the change of the shape of the flexible membrane structure.
[0011] Furthermore, the angle between the two control rods on each of the rotating shafts is fixed, and the two control rods rotate synchronously when rotating.
[0012] Furthermore, a rotating shaft mounting seat is fixedly mounted on the top of the fixing rod, and limiting protrusions are arranged at both ends of the rotating shaft mounting seat. Both ends of the rotating shaft are rotatably mounted on the two limiting protrusions through bearings.
[0013] Furthermore, the connecting rod is an electric rolling rod capable of rolling up or releasing the flexible membrane structure.
[0014] Furthermore, the connecting rod includes a winding tube and a tubular motor for controlling the rotation of the winding tube. Both ends of the winding tube are rotatably connected to the control rod through spherical joints. The edge of the flexible membrane structure is fixedly installed on the winding tube. The tubular motor can drive the winding tube to rotate so as to realize the winding or releasing of the flexible membrane structure.
[0015] Furthermore, the material of the flexible membrane structure is but not limited to PTFE membrane.
[0016] Furthermore, the cross sections of the fixing rod, the control rod and the connecting rod are all circular.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] 1. The bidirectionally torsionable bridge wind-vibration active control wing plate based on the flexible membrane structure provided by the utility model can change the torsion angle of the flexible membrane structure and the shape of the flexible membrane structure by twisting according to the vibration of the bridge, thereby providing a torque opposite to the torsion direction of the bridge, reducing the torsional deformation of the bridge caused by the bridge vibration mode, and achieving the effect of suppressing the torsional deformation of the bridge.
[0019] 2. The bidirectionally torsionable bridge wind-vibration active control wing plate based on a flexible membrane structure provided by the utility model is light in weight and easy to disassemble. The inertial force of vibration control is small and is conducive to control. The simple structure makes the entire structure lighter. The torsion angle and shape of the wing plate can also be controlled according to the vibration of the bridge. It can solve the problem in the prior art that the rigid wing plate cannot flexibly change its shape under the design wind speed, has a large weight, is inconvenient to install, and cannot flexibly change the torsion shape of the wing plate to fit the bridge vibration curve to achieve optimal suppression of bridge vibration. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0021] Figure 1 This is a schematic diagram of the structure of the active control wing plate of the utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the active control wing plate of the utility model;
[0023] Figure 3 This is a schematic diagram of the application state of the active control wing plate of the utility model on the bridge;
[0024] Figure 4 A schematic diagram of the structure of the active control wing panel is shown for adjusting the structure according to the vibration conditions of the bridge.
[0025] In the figure: 1. fixed rod; 2. rotating shaft; 3. control rod; 4. flexible membrane structure; 5. connecting rod; 6. rotating shaft mounting seat; 7. limiting protrusion. DETAILED DESCRIPTION
[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0029] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0030] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0033] Example 1
[0034] like Figure 1-4 As shown, the utility model provides a bidirectional torsion bridge wind vibration active control wing plate based on a flexible membrane structure, comprising a row of fixed rods 1 arranged at equal intervals and a flexible membrane structure 4 located above the fixed rods 1;
[0035] A rotating shaft 2 is rotatably mounted on the top of the fixed rod 1, two control rods 3 are mounted on the rotating shaft 2, and the bottom of the control rods 3 is fixedly mounted on the rotating shaft 2; the rotating shaft 2 is provided with a corresponding driving motor for driving the rotating shaft 2 to rotate clockwise or counterclockwise, thereby driving the two control rods 3 to rotate;
[0036] On a row of the fixed rods 1, among the control rods 3 located on the same side, two adjacent control rods 3 are connected by the connecting rod 5 installed on the top, and the connecting rod 5 is rotatably connected to the control rods 3 at both ends through a spherical joint; the two side edges of the flexible membrane structure 4 are respectively installed on the connecting rods 5 on both sides.
[0037] Furthermore, by controlling the operation of the driving motors on each of the fixed rods 1 respectively, the rotation angles of the rotating shaft 2 and the control rod 3 on each of the fixed rods 1 can be controlled respectively, thereby achieving a change in the shape of the flexible membrane structure 4, that is, enabling the flexible membrane structure 4 to be twisted in both directions.
[0038] Furthermore, since the bottoms of the two control rods 3 on each of the rotating shafts 2 are fixedly mounted on the rotating shaft 2 , the angle between the two control rods 3 is fixed, and the two control rods 3 rotate synchronously when rotating.
[0039] Furthermore, a rotating shaft mounting seat 6 is fixedly installed on the top of the fixing rod 1, and limiting protrusions 7 are arranged at both ends of the rotating shaft mounting seat 6. Both ends of the rotating shaft 2 are rotatably mounted on the two limiting protrusions 7 through bearings respectively, and the limiting protrusions 7 can axially limit the rotating shaft 2.
[0040] Furthermore, the connecting rod 5 is an electric rolling rod capable of rolling up or releasing the flexible membrane structure 4 .
[0041] Furthermore, the connecting rod 5 includes a winding tube and a tubular motor for controlling the rotation of the winding tube. Both ends of the winding tube are rotatably connected to the control rod 3 through spherical joints. The edge of the flexible membrane structure 4 is fixedly installed on the winding tube. The tubular motor can drive the winding tube to rotate so as to realize the winding or releasing of the flexible membrane structure 4.
[0042] Furthermore, the material of the flexible membrane structure 4 is but not limited to PTFE membrane.
[0043] Furthermore, the cross sections of the fixing rod 1 , the control rod 3 and the connecting rod 5 are all circular, and the surface smoothness coefficient of the circular rod is relatively high, which is beneficial to improving the control efficiency.
[0044] Furthermore, it also includes a solar panel for providing auxiliary electric energy for the driving motor and the tubular motor.
[0045] The bidirectional torsion bridge wind vibration active control wing plate based on the flexible membrane structure described in the utility model can be used to suppress the wind-induced vibration of a long-span cable system bridge and to actively control the flutter and vortex vibration of the bridge in actual construction. Specifically, Figure 3As shown, a bidirectional torsion bridge wind-induced vibration active control wing plate described in the present application can be installed on both sides of a long-span cable system bridge, so that the fixed rod 1 is installed on the bridge. When the bridge is vibrated by wind, the operation of the driving motors on each of the fixed rods 1 in the active control wing plate can be controlled separately, and then the rotation angles of the rotating shafts 2 and the control rods 3 on each of the fixed rods 1 can be controlled separately, so that the flexible membrane structure 4 can be twisted in the direction along the bridge, and then the size of the wind load on the surface of the flexible membrane structure 4 can be changed to flexibly control the wind-induced vibration of the bridge, so as to adapt to the vibration of the bridge and achieve the purpose of suppressing the vibration of the bridge; when the shape of the flexible membrane structure 4 is changed and the flexible membrane structure 4 is twisted, the operation of the tubular motor in the connecting rod 5 can be controlled so that the connecting rod 5 can reel and release the flexible membrane structure 4, adjust the tightness of the side, and ensure that the shape of the flexible membrane structure 4 can be changed smoothly.
[0046] When using the active control wing plate described in the utility model, ultrasonic wind speed and direction sensors and digital displacement sensors can also be set on both sides of the main beam at the peak of the main vibration mode of the bridge according to the different characteristics of the main vibration mode of each bridge. The ultrasonic wind speed and direction sensor is used to monitor the wind field data of the bridge vibration in real time, and the digital displacement sensor is used to monitor the vibration information of the bridge in real time, so as to monitor the vibration state change of the bridge caused by factors such as wind speed and wind direction of the main beam in real time, and then control the rotation angle of each driving motor of the active control wing plate, so that the flexible membrane structure 4 can be twisted as needed to adapt to the torsional vibration of the bridge;
[0047] When the bridge is stationary, the active control wing system does not move and has no effect on the aerodynamic performance of the bridge; Figure 4 As shown, when the bridge is affected by wind and vibrates, the active control wing can control the operation of each drive motor according to the vibration of the bridge main beam to make the flexible membrane structure 4 twist in the opposite direction of the vibration, change the torsional shape of the flexible membrane structure 4, change the aerodynamic performance of the bridge in real time, and improve the wind vibration performance of the bridge structure, so as to ensure the safety and life of the bridge structure.
[0048] The bidirectional torsion bridge wind-vibration active control wing plate based on a flexible membrane structure described in the utility model changes the traditional rigid wing plate and adopts a flexible membrane structure. It is connected to the bridge body and the upper membrane structure through a fixed rod. The rotation of the control rod is realized by the rotation of the rotating shaft, and then the torsion angle of the flexible membrane structure is controlled, the shape of the flexible membrane structure is changed, and a torque opposite to the torsion direction of the bridge is provided, so as to achieve the purpose of suppressing the vibration of the bridge. The device adopts a membrane structure. Compared with the traditional rigid material (such as steel plate) system, the membrane structure is easy to install and disassemble, light in weight and small inertia force, so the input power requirement is low, the span of a single span of the applicable wing plate system can be increased, and it has good economic value. It is connected to the membrane structure through rods, which greatly saves material costs. The wing plate structure provided by the present application is convenient for construction, and can be repaired and maintained together with the bridge when in use, thereby reducing the cost of the bridge.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.
Claims
1. A bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure, characterized in that: It includes a row of fixed rods arranged at intervals and a flexible membrane structure located above the fixed rods; A rotating shaft is rotatably mounted on the top of the fixed rod, two control rods are mounted on the rotating shaft, and the bottom of the control rod is fixedly mounted on the rotating shaft; the rotating shaft is provided with a corresponding driving motor for driving the rotating shaft to rotate, thereby driving the two control rods to rotate; On a row of the fixed rods, among the control rods located on the same side, two adjacent control rods are connected by a connecting rod installed on the top, and the connecting rod is rotatably connected to the control rods at both ends through a spherical joint; the two side edges of the flexible membrane structure are respectively installed on the connecting rods on both sides.
2. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: By controlling the operation of the driving motors on the fixing rods respectively, the rotation angles of the rotating shafts and the control rods on the fixing rods can be controlled respectively, thereby achieving the change of the shape of the flexible membrane structure.
3. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: The angle between the two control rods on each of the rotating shafts is fixed, and the two control rods rotate synchronously when rotating.
4. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: A rotating shaft mounting seat is fixedly mounted on the top of the fixing rod, and limiting protrusions are arranged at both ends of the rotating shaft mounting seat. Both ends of the rotating shaft are rotatably mounted on the two limiting protrusions through bearings.
5. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: The connecting rod is an electric rolling rod, which can roll up or release the flexible membrane structure.
6. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 5 is characterized in that: The connecting rod includes a winding tube and a tubular motor for controlling the rotation of the winding tube. Both ends of the winding tube are rotatably connected to the control rod through spherical joints. The edge of the flexible membrane structure is fixedly installed on the winding tube. The tubular motor can drive the winding tube to rotate so as to realize the winding or releasing of the flexible membrane structure.
7. The bidirectional torsion bridge wind-induced vibration active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: The flexible membrane structure is made of PTFE membrane.
8. The bidirectional torsion bridge wind-induced active control wing plate based on a flexible membrane structure according to claim 1 is characterized in that: The cross sections of the fixing rod, the control rod and the connecting rod are all circular.