A vibration and earthquake double control damper resistant to low-frequency pulsating high-speed wind-induced vibration and earthquake action

Abstract

The application discloses a vibration and earthquake double-control damper resisting low-frequency pulsating high-speed wind-induced vibration and earthquake action, relates to the technical field of structural engineering and vibration control, and comprises a connecting seat, the outer side of the connecting seat is provided with a semi-active control assembly, the semi-active control assembly comprises a sensor module, a magneto-rheological damper, a fixing ring and a supporting plate, the outer side lower portion of the connecting seat is provided with the sensor module, and the outer side of the connecting seat is rotationally connected with the magneto-rheological damper. The vibration and earthquake double-control damper resisting low-frequency pulsating high-speed wind-induced vibration and earthquake action can accurately detect the real-time motion state of the connecting seat by means of the acceleration, displacement and speed sensors built in the sensor module after the connecting seat and the wind tunnel shell are connected, the controller can flexibly adjust the magnetic field strength of the magneto-rheological damper according to the real-time feedback data of the sensor, and then the damping force size can be quickly and accurately changed.

Description

Technical Field

[0001] This invention relates to the fields of structural engineering and vibration control technology, specifically to a vibration-controlled damper that resists low-frequency pulsating high-speed wind-induced vibration and seismic action. Background Technology

[0002] A wind tunnel is a core artificial testing device in the field of aerodynamics. Simply put, it is a specialized testing facility that uses artificial means to generate controllable and stable airflow in a closed pipe or tunnel structure to simulate the surrounding flow field environment when various objects move in airflow at different speeds and operating conditions. This allows for precise measurement of the aerodynamic forces acting on the object and observation of flow field characteristics, providing quantitative aerodynamic data for product design, performance optimization, and scientific research. It is also an indispensable key infrastructure in research and development in fields such as aerospace and vehicle engineering. When a wind tunnel is running, the high-speed jet in the test section interacts with components such as the collector, which easily generates low-frequency pressure pulsations. The pulsation energy generated by this fluid structure coupling is large and easily resonates with the natural frequency of the tunnel or supporting frame, causing continuous structural vibration. Therefore, damping devices are needed to comprehensively control wind-induced low-frequency pulsating vibrations and unbalanced aerodynamic forces.

[0003] Current technological approaches to wind tunnel vibration problems all have limitations: research on active control of model vibration focuses on wind tunnel test models and their tail support systems, using piezoelectric ceramic actuators to achieve active vibration suppression, which has significant effects. However, this system is designed for high-frequency vibrations of small-mass models, and its actuation force and stroke are far from sufficient to cope with the vibrations of tunnel structures weighing tens to hundreds of tons, and it consumes a lot of energy. As for passive tuning and base isolation, they are widely used in the construction field, but they have poor adaptability to low-frequency pulsations in wind tunnels with fixed frequencies, and their control effect on unbalanced forces and broadband seismic excitation is limited. Active mass dampers are used in super high-rise buildings for wind and earthquake resistance, providing reverse control force through large mass blocks and powerful actuators. However, directly applying it to wind tunnels faces challenges: the vibration spectrum of wind tunnels is complex (containing pulsating, random, and seismic components), requiring extremely high robustness of the control algorithm; to control large structures, active mass dampers require enormous driving energy and powerful actuators, with cost, energy consumption, and reliability being bottlenecks. In summary, existing technologies lack an integrated solution that can simultaneously, efficiently, and economically address the two different mechanical excitations unique to wind tunnel structures: "low-frequency pulsating vibration and unbalanced forces during operation" and "strong earthquakes during sporadic periods." Summary of the Invention

[0004] The purpose of this invention is to provide a vibration-controlled damper that resists low-frequency pulsating high-speed wind-induced vibration and seismic action, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action, comprising a connecting base, a semi-active control component disposed on the outer side of the connecting base, and the semi-active control component comprising a sensor module, a magnetorheological damper, a fixing ring and a support plate, the sensor module being disposed on the lower outer side of the connecting base, and the magnetorheological damper being rotatably connected to the outer side of the connecting base, the fixing ring being rotatably connected to the outer side of the magnetorheological damper, and a support plate being disposed at the bottom of the connecting column, a connecting component being connected to one side of the semi-active control component, and a passive energy dissipation component being disposed below the connecting component.

[0006] Furthermore, the magnetorheological dampers are equidistantly distributed circumferentially along the inner side of the fixed ring, and the support plates are symmetrically distributed about the center line of the fixed ring.

[0007] Furthermore, the connecting assembly includes a connecting ring and a connecting post, with the connecting ring fixed on one side of the connecting seat and the connecting post disposed on one side of the connecting ring.

[0008] Furthermore, the connecting assembly also includes a clamping plate, a toothed ring, and a gear. A clamping plate is provided on the outer side of the connecting column, and a toothed ring is fixed to one end of the clamping plate. A gear is meshed with one side of the toothed ring.

[0009] Furthermore, two toothed rings are provided, and the clamps are distributed in a circumferential array along the inner side of the toothed rings.

[0010] Furthermore, the connecting assembly also includes a fixed cover and a reduction motor. The fixed cover is rotatably connected to the other side of the gear ring, and the reduction motor is mounted on the outside of the fixed cover.

[0011] Furthermore, the gears are equidistantly distributed circumferentially along one side of the gear ring, and the gears are rotatably connected to the fixed cover, with one of the gears being fixedly connected to the output end of the reduction motor.

[0012] Furthermore, the passive energy dissipation component includes a support, a shear energy dissipation plate, a base, and stiffening ribs. The bottom of the fixed cover is fixed with a support, and the bottom of the support is provided with a shear energy dissipation plate. The bottom of the shear energy dissipation plate is welded with a base, and the base is provided with stiffening ribs inside.

[0013] This invention provides a vibration-controlled damper that resists low-frequency pulsating high-speed wind-induced vibration and seismic action, and has the following beneficial effects: 1. This invention, through the setting of a semi-active control component, connects the connecting seat to the wind tunnel shell. With the help of the acceleration, displacement, and velocity sensors built into the sensor module, the real-time motion state of the connecting seat can be accurately detected. The controller can flexibly adjust the magnetic field strength of the magnetorheological damper based on the real-time feedback data from the sensors, thereby quickly and accurately changing the magnitude of the damping force. This control method only consumes a small amount of electrical energy to generate a damping force of tens of kilonewtons, which can offset the low-frequency pulsations and random unbalanced forces generated during wind tunnel operation in real time, achieving an "adaptive tracking" vibration reduction effect. This design can not only effectively suppress wind-induced vibration of the wind tunnel structure, keeping the wind tunnel in a stable operating state and improving the testing accuracy of wind tunnel aerodynamic tests, but also reduce the fatigue wear of continuous vibration on the tunnel structure and supporting test instruments, extending the service life of related equipment. At the same time, the low-energy consumption operation characteristics can also reduce the daily operating cost of the device and adapt to the long-term continuous operation and use requirements of wind tunnels. 2. This invention, through the configuration of the connecting components, enables intelligent start-stop control of the passive energy dissipation components, adapting to vibration control requirements under different operating conditions. Under normal wind tunnel operation, the geared motor drives the gears to rotate, simultaneously driving the two gear rings to rotate in different directions, thereby causing the clamping plate to loosen the connecting column, putting the passive energy dissipation components in a non-working state. This avoids interference with the vibration reduction control of the semi-active control components, ensuring the vibration reduction accuracy and control effect of the semi-active control components, and making the vibration reduction operation more in line with the vibration control requirements of daily wind tunnel operation. When encountering an earthquake, the controller drives the geared motor to rotate based on the feedback signal from the sensor, thereby causing the clamping plate to clamp the connecting column, forming a rigid connection between the passive energy dissipation components and the connecting seat. The force generated by the earthquake can be smoothly transmitted to the shear energy dissipation plate below the support, efficiently dissipating the huge energy brought by the earthquake through the yielding deformation of the metal, quickly absorbing the earthquake impact, effectively protecting the integrity of the wind tunnel structure and its auxiliary frames, providing reliable seismic safety for this important infrastructure, and avoiding serious damage to the core structure of the wind tunnel caused by earthquakes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall front view of a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to the present invention. Figure 2 This is a schematic diagram of the overall rear view structure of a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to the present invention. Figure 3 This is a partial structural diagram of the semi-active control component of a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to the present invention. Figure 4This is a schematic diagram of the connecting component of a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to the present invention. Figure 5 This is a schematic diagram of the toothed ring structure of a vibration-damping device with dual control for vibration and seismic action according to the present invention.

[0015] In the diagram: 1. Connecting seat; 2. Semi-active control component; 201. Sensor module; 202. Magnetorheological damper; 203. Fixing ring; 204. Support plate; 3. Connecting component; 301. Connecting ring; 302. Connecting column; 303. Clamping plate; 304. Gear ring; 305. Gear; 306. Fixing cover; 307. Gear motor; 4. Passive energy dissipation component; 401. Support; 402. Shear energy dissipation plate; 403. Base; 404. Stiffening rib. Detailed Implementation

[0016] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0017] like Figures 1 to 3 As shown, a vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action includes a connecting base 1. A semi-active control component 2 is disposed on the outer side of the connecting base 1. The semi-active control component 2 includes a sensor module 201, a magnetorheological damper 202, a fixed ring 203, and a support plate 204. The sensor module 201 is disposed on the lower outer side of the connecting base 1, and the magnetorheological damper 202 is rotatably connected to the outer side of the connecting base 1. The fixed ring 203 is rotatably connected to the outer side of the magnetorheological damper 202, and the support plate 204 is disposed at the bottom of the connecting column 302. The magnetorheological damper 202 is equidistantly distributed in a circular pattern along the inner side of the fixed ring 203, and the support plate 204... The 204 components are symmetrically distributed about the center line of the fixed ring 203. The sensor module 201 has built-in acceleration, displacement, and velocity sensors. Since these sensors are commonly used detection devices in existing active vibration damping devices, and the detection method of this application is consistent with existing equipment, it will not be described in detail here. Therefore, the controller can flexibly adjust the magnetic field strength of the magnetorheological damper 202 according to the real-time feedback data of the sensors, thereby quickly and accurately changing the magnitude of the damping force. This control method only needs to consume a small amount of electrical energy to generate a damping force of tens of kilonewtons, which can offset the low-frequency pulsation and random unbalanced force generated during wind tunnel operation in real time, and achieve an "adaptive tracking" vibration reduction effect.

[0018] like Figure 2 , Figure 4 and Figure 5As shown, a connecting component 3 is connected to one side of the semi-active control component 2, and a passive energy dissipation component 4 is disposed below the connecting component 3. The connecting component 3 includes a connecting ring 301 and a connecting post 302. The connecting ring 301 is fixed to one side of the connecting seat 1, and the connecting post 302 is disposed on one side of the connecting ring 301. The connecting component 3 also includes a clamping plate 303, a gear ring 304, and a gear 305. The clamping plate 303 is disposed on the outer side of the connecting post 302, and the gear ring 304 is fixed to one end of the clamping plate 303. A gear is meshed with one side of the gear ring 304. 305. Two gear rings 304 are provided. Clamping plates 303 are arranged in a circumferential array along the inner side of the gear rings 304. The control gear 305 rotates, synchronously driving the two gear rings 304 to rotate in different directions. The clamping plates 303 clamp the connecting column 302, so that a rigid connection is formed between the passive energy dissipation component 4 and the connecting seat 1, so as to transmit the force to the shear energy dissipation plate 402 below the support 401. The huge seismic energy is dissipated through the yield deformation of the metal, providing reliable safety. The connecting component 3 also includes a fixing cover 306 and a reduction motor 307. A fixed cover 306 is rotatably connected to the other side of the gear ring 304. A geared motor 307 is mounted on the outside of the fixed cover 306. Gears 305 are equidistantly distributed circumferentially along one side of the gear ring 304 and are rotatably connected to the fixed cover 306. One of the gears 305 is fixedly connected to the output end of the geared motor 307. The reducer of the geared motor 307 is a worm gear reducer, which has self-locking performance to improve the stability after connection. The passive energy dissipation component 4 includes a support 401, a shear energy dissipation plate 402, a base 403, and stiffeners. Rib 404, the bottom of the fixed cover 306 is fixed with support 401, and the bottom of support 401 is equipped with shear energy dissipation plate 402. With the help of the yield deformation of metal, the huge energy brought by the earthquake is efficiently dissipated, the earthquake impact force is quickly absorbed, and the integrity of the wind tunnel structure and the attached frame is effectively protected, providing reliable seismic safety guarantee for the wind tunnel, an important infrastructure. The bottom of shear energy dissipation plate 402 is welded with base 403, and the inside of base 403 is provided with stiffening rib 404 to enhance the strength of base 403.

[0019] In summary, this vibration-controlled damper, which resists low-frequency pulsating high-speed wind-induced vibration and seismic forces, should be used first according to... Figure 1 , Figure 2 and Figure 3The structure shown, under normal conditions, drives the gear 305 to rotate via the reduction motor 307, synchronously driving the two gear rings 304 to rotate in different directions under the limitation of the fixed cover 306. This causes the clamping plate 303 to loosen the connecting column 302, thereby preventing the passive energy dissipation component 4 from participating in the work and improving the control effect of the semi-active control component 2. Then, the acceleration, displacement, and velocity sensors in the sensor module 201 can be used to detect the motion state of the connecting seat 1. Therefore, through sensor feedback, the controller adjusts the magnetic field strength of the magnetorheological damper 202, thereby quickly and accurately changing the damping force. This method can generate damping forces of up to tens of kilonewtons with a small amount of electrical energy, which can offset low-frequency pulsations and random unbalanced forces in real time, achieving "adaptive tracking" vibration reduction. Finally, when an earthquake occurs, the sensor feedback can drive the geared motor 307 to rotate, thereby causing the clamping plate 303 to clamp the connecting column 302, so that the passive energy dissipation component 4 and the connecting seat 1 form a rigid connection, so as to transmit the force to the shear energy dissipation plate 402 under the support 401, dissipating huge seismic energy through the yielding deformation of the metal, providing reliable safety protection, and improving the overall strength of the base 403 through the stiffening rib 404.

[0020] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action, comprising a connecting base (1), characterized in that, A semi-active control component (2) is provided on the outside of the connecting seat (1), and the semi-active control component (2) includes a sensor module (201), a magnetorheological damper (202), a fixing ring (203) and a support plate (204). The sensor module (201) is placed on the lower part of the outside of the connecting seat (1), and the magnetorheological damper (202) is rotatably connected to the outside of the connecting seat (1). The fixing ring (203) is rotatably connected to the outside of the magnetorheological damper (202), and the support plate (204) is placed at the bottom of the connecting column (302). A connecting component (3) is connected to one side of the semi-active control component (2), and a passive energy dissipation component (4) is provided below the connecting component (3).

2. The vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 1, characterized in that, The magnetorheological dampers (202) are distributed in an equidistant circular pattern along the inner side of the fixed ring (203), and the support plates (204) are symmetrically distributed about the center line of the fixed ring (203).

3. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 2, characterized in that, The connecting assembly (3) includes a connecting ring (301) and a connecting post (302). The connecting ring (301) is fixed on one side of the connecting seat (1), and the connecting post (302) is placed on one side of the connecting ring (301).

4. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 3, characterized in that, The connecting assembly (3) further includes a clamping plate (303), a toothed ring (304) and a gear (305). The clamping plate (303) is provided on the outside of the connecting column (302), and a toothed ring (304) is fixed at one end of the clamping plate (303). A gear (305) is meshed with one side of the toothed ring (304).

5. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 4, characterized in that, Two toothed rings (304) are provided, and the clamps (303) are arranged in a circumferential array along the inner side of the toothed rings (304).

6. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 5, characterized in that, The connecting assembly (3) also includes a fixed cover (306) and a geared motor (307). The fixed cover (306) is rotatably connected to the other side of the gear ring (304), and the geared motor (307) is arranged on the outside of the fixed cover (306).

7. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 6, characterized in that, The gears (305) are equidistantly distributed circumferentially along one side of the gear ring (304), and the gears (305) are rotatably connected to the fixed cover (306), and one of the gears (305) is fixedly connected to the output end of the geared motor (307).

8. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 7, characterized in that, The passive energy dissipation component (4) includes a support (401), a shear energy dissipation plate (402), a base (403), and stiffening ribs (404). The support (401) is fixed to the bottom of the fixed cover (306), and the shear energy dissipation plate (402) is placed at the bottom of the support (401). The base (403) is welded to the bottom of the shear energy dissipation plate (402), and stiffening ribs (404) are provided inside the base (403).

9. A vibration-damping dual-control damper for resisting low-frequency pulsating high-speed wind-induced vibration and seismic action according to claim 8, characterized in that, The operation method is as follows: the gear (305) is driven to rotate by the geared motor (307), and the two gear rings (304) are driven to rotate in different directions under the limit of the fixed cover (306), so that the clamp (303) can loosen the connecting column (302), thereby making the passive energy dissipation component (4) not participate in the work, improving the control effect of the semi-active control component (2). Then, the acceleration, displacement and velocity sensors in the sensor module (201) can be used to detect the motion state of the connecting seat (1). Therefore, through sensor feedback, the controller adjusts the magnetorheological resistance. The magnetic field strength of the damper (202) can be adjusted quickly and accurately to change the damping force. When an earthquake occurs, the sensor feedback can drive the geared motor (307) to rotate, thereby causing the clamping plate (303) to clamp the connecting column (302), so that a rigid connection is formed between the passive energy dissipation component (4) and the connecting seat (1), so that the force can be transmitted to the shear energy dissipation plate (402) under the support (401). The huge earthquake energy is dissipated through the yielding deformation of the metal, providing reliable safety protection, and the overall strength of the base (403) is improved by the stiffening rib (404).

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