Pneumatic self-adaptive damping device for bridge cable vortex vibration suppression
By installing an adjustable vane structure on the bridge cables and using wind speed and direction sensors to optimize the vane angle, the problem of poor vortex-induced vibration suppression in existing technologies has been solved, achieving long-term effective control and low maintenance costs in complex wind environments.
Patent Information
- Application Number
- CN202520005527.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing methods for suppressing vortex-induced vibration in bridge cables are ineffective in complex wind environments, are complicated to install, have high maintenance costs, and affect the appearance, making it difficult to effectively control vortex-induced vibration in the long term.
An adjustable vane structure is adopted, and the vane angle is adjusted in real time by wind speed and wind direction sensors. The vane made of lightweight composite material changes the airflow path and disrupts the formation of Karman vortex street. The angle is optimized by combining servo motor and data processing module to reduce vortex vibration.
It achieves long-term effective vortex-induced vibration suppression in complex wind environments, reduces vortex-induced vibration amplitude, lowers maintenance complexity and appearance impact, and is highly adaptable and low-cost.
Smart Images
Figure CN223823992U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge engineering and structural dynamics technology, and in particular to an aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables. Background Technology
[0002] In long-span bridges (such as cable-stayed bridges and suspension bridges), cables are one of the key load-bearing components of the bridge structure. Their function is to transfer the load on the bridge deck to the bridge towers and anchorages, thereby maintaining the structural stability of the entire bridge.
[0003] However, the slender structure of bridge cables makes them very sensitive to wind loads. When air flows over the cables within a suitable wind speed range, a series of periodic vortices will be generated on the leeward side, forming a Karman vortex street. The alternating shedding of this vortex street will exert a periodically changing lateral force on the cables, thereby causing periodic vibrations of the cables. This phenomenon is called cable vortex-induced vibration.
[0004] To control cable-induced vortex-induced vibration (TMD), various control measures have been proposed in the industry. Some of the main methods include: 1. Tuned mass dampers (TMDs): These dampers adjust the natural frequencies of the added mass and springs to be close to the natural frequency of the cable, thereby reducing the amplitude of cable vibration through phase cancellation. However, the effectiveness of tuned mass dampers is highly dependent on frequency matching, and wind speed variations often cause the vortex-induced vibration frequency to fluctuate within a large range, limiting the effectiveness of TMDs. 2. Mechanical dampers: These dampers generate energy dissipation through relative motion with the cable to reduce the amplitude of vibration. However, mechanical devices require regular maintenance and inspection, especially for high-altitude sections of bridges, increasing the complexity and cost of maintenance. 3. Surface roughness enhancement: By adding helical strips or roughening strips to the cable surface, the stability of airflow on the cable surface is disrupted, reducing the formation of vortex streets and suppressing vibration. Although this method is simple and direct, it has a significant impact on the overall appearance of the bridge, especially for important urban landmark bridges where the aesthetic design of the cables cannot be ignored.
[0005] While the above methods can reduce vortex-induced vibration of the cables to some extent, they still have problems such as complex installation, insufficient adaptability, impact on appearance, and high maintenance costs. Especially in complex wind environments with frequent changes in wind speed, these methods usually cannot maintain long-term effective control. Utility Model Content
[0006] In view of the above-mentioned problems in the prior art, the main objective of this utility model is to provide an aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables.
[0007] The technical solution of this utility model is as follows: an aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables, comprising a bridge cable body, wherein first buckles are equidistantly arranged on the outer side of the bridge cable body, and a fixed box is fixedly connected to one side of each of the first buckles. A wing is rotatably installed inside each of the fixed boxes. The wing is made of lightweight composite material, and multiple winglets are symmetrically arranged around the bridge cable body. A deflector strip is fixedly connected to both sides of each winglet at equal intervals.
[0008] By adopting the above technical solution, the airflow path is changed by adjusting the angle of each vane, thereby suppressing the shedding of vortices. The vane adjustment method is optimized according to wind speed and wind direction to ensure that the vanes are always kept at the optimal angle, thereby disrupting the formation of the Karman vortex street and effectively reducing the amplitude of vortex vibration.
[0009] In a preferred embodiment, a wind speed sensor is fixedly installed at the top of the first buckle, a wind direction sensor is fixedly installed at the bottom of the first buckle, a controller is fixedly installed on the inner wall of the fixed box, and a data processing module is fixedly installed on the inner wall of the fixed box and on one side of the controller.
[0010] By adopting the above technical solution, the data processing module obtains data on wind speed, wind direction, and vibration amplitude, and calculates the optimal adjustment angle of the blades to ensure that the aerodynamic damper can effectively reduce the impact of vortex-induced vibration under different wind speed conditions.
[0011] In a preferred embodiment, a support plate is fixedly connected to the outside of the fixed box, and a servo motor is provided at the top of each support plate. Bolts are provided between the servo motor and the support plate, and the servo motor is connected to the corresponding support plate by bolts.
[0012] By adopting the above technical solution and controlling it with a servo motor, the angle can be adjusted from horizontal to different tilt states. This flexible adjustment can adapt to complex wind environments, making the airflow separation points around the bridge cable body unstable and suppressing the periodic shedding of vortex streets.
[0013] In a preferred embodiment, each of the first buckles is provided with two first locking screws inside, and the first buckle is installed on the outside of the bridge cable body by the two first locking screws.
[0014] By adopting the above technical solution and using the first locking screw, the first buckle can be designed to be detachable, allowing each blade to be installed and removed independently. This modular design makes the maintenance of the damper easier.
[0015] In a preferred embodiment, a second buckle is provided on the outer side of the bridge cable body, and an acceleration sensor is fixedly installed on the outer side of the second buckle.
[0016] By adopting the above technical solution and setting up an accelerometer, the vibration amplitude and frequency of the bridge cable body can be measured, thereby enabling real-time acquisition of the vibration status of the bridge cable body and providing accurate data for structural control.
[0017] In a preferred embodiment, each of the second buckles is provided with a second locking screw inside, and the second buckle is installed on the outside of the bridge cable body by means of the second locking screw.
[0018] By adopting the above technical solution, and through the second locking screw and the second buckle, the accelerometer sensor can be easily disassembled and maintained.
[0019] In a preferred embodiment, the accelerometer, wind speed sensor, servo motor, data processing module, and wind direction sensor are all electrically connected to the controller.
[0020] By adopting the above technical solution, the controller can achieve the control purpose of the acceleration sensor, wind speed sensor, servo motor, data processing module and wind direction sensor.
[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0022] 1. In this utility model, an adjustable vane structure is adopted around the bridge cable body. The design can form a symmetrical arrangement around the bridge cable body. By adjusting the angle of each vane, the airflow path is changed, thereby suppressing the shedding of vortices. The adjustment method of the vanes is optimized according to wind speed and wind direction to ensure that the vanes are always kept at the optimal angle, thereby disrupting the formation of the Karman vortex street and effectively reducing the amplitude of vortex-induced vibration. This allows for long-term effective control. Furthermore, the vanes are made of lightweight composite materials, such as high-strength carbon fiber composite materials or glass fiber materials. These materials can ensure sufficient strength and rigidity of the vanes while keeping the weight within a low range to minimize the additional load on the bridge cable body.
[0023] 2. In this utility model, by setting up wind speed and wind direction sensors, it is possible to collect wind speed and wind direction data around the bridge cable body in real time. Wind speed and wind direction are key factors affecting the occurrence of cable vortex-induced vibration. By accurately collecting these data, the control structure can make a rapid response and adjust the blade angle. The data processing module calculates the optimal adjustment angle of the blade by acquiring data on wind speed, wind direction and vibration amplitude, so as to ensure that the aerodynamic damper can effectively reduce the influence of vortex-induced vibration under different wind speed conditions. Attached Figure Description
[0024] Figure 1 This utility model provides an overall perspective view of an aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables.
[0025] Figure 2 This utility model provides a side view of an aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables;
[0026] Figure 3 This invention provides an aerodynamic adaptive damping device for suppressing vortex-induced vibration in bridge cables. Figure 2 Enlarged view of point A in the middle.
[0027] Legend: 1. Bridge cable body; 2. First buckle; 3. First locking screw; 4. Wing; 5. Second buckle; 6. Accelerometer; 7. Second locking screw; 8. Deflector; 9. Wind speed sensor; 10. Servo motor; 11. Support plate; 12. Fixing box; 13. Controller; 14. Data processing module; 15. Wind direction sensor. Detailed Implementation
[0028] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0029] Reference Figure 1-3An aerodynamic adaptive damping device for suppressing vortex-induced vibration in bridge cables includes a bridge cable body 1. First buckles 2 are equidistantly arranged on the outer side of the bridge cable body 1. A fixed box 12 is fixedly connected to one side of each first buckle 2. Wings 4 are rotatably mounted inside each fixed box 12. The wings 4 are made of lightweight composite material. Multiple wings 4 are symmetrically arranged around the bridge cable body 1. Deflector strips 8 are equidistantly fixed to both sides of each wing 4. This design employs an adjustable wing 4 structure arranged around the bridge cable body 1, which is designed to form a symmetrical arrangement around the bridge cable body 1. Through adjustment... The angle of each blade 4 is adjusted to change the airflow path, thereby suppressing the shedding of vortices. The adjustment method of blade 4 is optimized according to wind speed and wind direction to ensure that blade 4 is always kept at the best angle, which disrupts the formation of the Karman vortex street and effectively reduces the amplitude of vortex vibration, thus maintaining a long-term effective control effect. Blades 4 are made of lightweight composite materials, such as high-strength carbon fiber composite materials or glass fiber materials. These materials can ensure that blade 4 has sufficient strength and rigidity while keeping the weight within a low range to minimize the additional load on the bridge cable body 1.
[0030] Reference Figure 3 A wind speed sensor 9 is fixedly installed at the top of the first buckle 2, and a wind direction sensor 15 is fixedly installed at the bottom of the first buckle 2. A controller 13 is fixedly installed on the inner wall of the fixed box 12, and a data processing module 14 is fixedly installed on the inner wall of the fixed box 12 and on one side of the controller 13. With the setting of the wind speed sensor 9 and the wind direction sensor 15, the wind speed and wind direction data around the bridge cable body 1 can be collected in real time. Wind speed and wind direction are key factors affecting the occurrence of cable vortex-induced vibration. By accurately collecting these data, the control structure can make a rapid response and adjust the angle of the blade 4. The data processing module 14 calculates the optimal adjustment angle of the blade 4 by acquiring the data of wind speed, wind direction and vibration amplitude, so as to ensure that the aerodynamic damper can effectively reduce the influence of vortex-induced vibration under different wind speed conditions.
[0031] Reference Figure 3 Support plates 11 are fixedly connected to the outside of the fixed box 12. Servo motors 10 are installed at the top of the support plates 11. Bolts are installed between the servo motors 10 and the support plates 11. The servo motors 10 and the corresponding support plates 11 are connected by bolts. Each blade 4 is equipped with an independent adjustment structure. The angle can be adjusted from horizontal to different tilt states by the control of the servo motor 10. This flexible adjustment can adapt to complex wind environments, making the airflow separation point around the bridge cable body 1 unstable and suppressing the periodic shedding of vortex streets. This design makes the aerodynamic damper particularly effective in the low and medium wind speed range, because vortex vibration is most frequent in this range.
[0032] Reference Figure 1 The first buckle 2 is equipped with two first locking screws 3 inside. The first buckle 2 is installed on the outside of the bridge cable body 1 through the two first locking screws 3. The use of the first locking screws 3 enables the first buckle 2 to have a detachable design, so that each wing 4 can be installed and removed independently. This modular design makes the maintenance of the damper easier, and some wing 4 devices can be replaced or maintained during the normal operation of the bridge without shutting down the entire system.
[0033] Reference Figure 1 A second buckle 5 is provided on the outer side of the bridge cable body 1, and an acceleration sensor 6 is fixedly installed on the outer side of the second buckle 5. The acceleration sensor 6 can be used to measure the vibration amplitude and frequency of the bridge cable body 1, so as to obtain the vibration status of the bridge cable body 1 in real time, provide accurate data for the control structure, and analyze the current vibration status and trend.
[0034] Reference Figure 1 The second buckle 5 is equipped with a second locking screw 7 inside. The second buckle 5 is installed on the outside of the bridge cable body 1 through the second locking screw 7. The second locking screw 7 and the second buckle 5 make it easy to disassemble and maintain the acceleration sensor 6.
[0035] Reference Figure 1 Accelerometer 6, wind speed sensor 9, servo motor 10, data processing module 14 and wind direction sensor 15 are all electrically connected to controller 13. Controller 13 can control accelerometer 6, wind speed sensor 9, servo motor 10, data processing module 14 and wind direction sensor 15.
[0036] Working principle: First, an adjustable vane 4 structure is adopted around the bridge cable body 1. The design can form a symmetrical arrangement around the bridge cable body 1. By adjusting the angle of each vane 4, the airflow path is changed, thereby suppressing the shedding of vortices. The adjustment method of the vane 4 is optimized according to wind speed and wind direction to ensure that the vane 4 always maintains the optimal angle, which disrupts the formation of the Karman vortex street and effectively reduces the amplitude of vortex vibration, thus maintaining a long-term effective control effect. The vane 4 is made of lightweight composite materials, such as high-strength carbon fiber composite materials or glass fiber materials. These materials can ensure that the vane 4 has sufficient strength and rigidity while keeping the weight within a low range to minimize the additional load on the bridge cable body 1.
[0037] Controlled by servo motor 10, the angle can be adjusted from horizontal to different tilt states. This flexible adjustment can adapt to complex wind environments, making the airflow separation points around the bridge cable body 1 unstable and suppressing the periodic shedding of vortex streets. This design makes the aerodynamic damper particularly effective in the low to medium wind speed range, because vortex-induced vibration is most frequent in this range.
[0038] Furthermore, by setting up wind speed sensor 9 and wind direction sensor 15, wind speed and wind direction data around the bridge cable body 1 can be collected in real time. Through accurate collection of this data, the control structure can respond quickly and adjust the angle of the vane 4. By setting up acceleration sensor 6, the vibration amplitude and frequency of the bridge cable body 1 can be measured, thereby obtaining the vibration status of the bridge cable body 1 in real time. The data processing module 14 calculates the optimal adjustment angle of the vane 4 by acquiring wind speed, wind direction and vibration amplitude data, so as to ensure that the aerodynamic damper can effectively reduce the influence of vortex vibration under different wind speed conditions.
[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables, comprising a bridge cable body (1), characterized in that: The outer side of the bridge cable body (1) is provided with first buckles (2) at equal intervals. Each of the first buckles (2) is fixedly connected to a fixed box (12) on one side. Each of the fixed boxes (12) is rotatably installed with a wing (4). The wing (4) is made of lightweight composite material. Multiple wing (4) are arranged symmetrically around the bridge cable body (1). Both sides of the wing (4) are fixedly connected with a deflector strip (8) at equal intervals.
2. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 1, characterized in that: A wind speed sensor (9) is fixedly installed at the top of the first buckle (2), a wind direction sensor (15) is fixedly installed at the bottom of the first buckle (2), a controller (13) is fixedly installed on the inner wall of the fixed box (12), and a data processing module (14) is fixedly installed on the inner wall of the fixed box (12) and on one side of the controller (13).
3. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 2, characterized in that: The outer side of each fixed box (12) is fixedly connected to a support plate (11), and a servo motor (10) is provided at the top of each support plate (11). Bolts are provided between the servo motor (10) and the support plate (11), and the servo motor (10) and the corresponding support plate (11) are connected by bolts.
4. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 1, characterized in that: The first buckle (2) is provided with two first locking screws (3) inside. The first buckle (2) is installed on the outside of the bridge cable body (1) by the two first locking screws (3).
5. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 3, characterized in that: The bridge cable body (1) is provided with a second buckle (5) on the outside, and an acceleration sensor (6) is fixedly installed on the outside of the second buckle (5).
6. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 5, characterized in that: The second buckle (5) is provided with a second locking screw (7) inside, and the second buckle (5) is installed on the outside of the bridge cable body (1) by the second locking screw (7).
7. The aerodynamic adaptive damping device for suppressing vortex-induced vibration of bridge cables according to claim 5, characterized in that: The acceleration sensor (6), wind speed sensor (9), servo motor (10), data processing module (14) and wind direction sensor (15) are all electrically connected to the controller (13).