An intelligent wind barrier for high-speed railway bridges and a control method for the intelligent wind barrier

Abstract

The present application relates to an intelligent wind barrier for high-speed railway bridges and a control method for the intelligent wind barrier. The wind barrier includes a number of support columns on both sides of the bridge. A wind barrier assembly is provided between two adjacent support columns on the same side. The wind barrier assembly includes a porous wind barrier plate provided with circular holes and a fan disposed in the circular holes. The fan is coaxial with the circular hole, and the axis of the circular hole is perpendicular to the porous wind barrier plate. The fan is electrically connected to a controller for controlling the rotational speed of the fan, and the controller is electrically connected to a wind speed sensor. The present application can control the rotational speed of the fan according to different wind speeds to achieve adaptive adjustment of the ventilation rate, and can also be used to control the forward and reverse rotation of the fan to achieve active flow control, reduce the wind-induced vibration response of the bridge, and can combine wind power generation, active flow control with traditional wind barriers, which is applicable to remote mountain railway bridges with difficult power supply and prone to strong cross winds, so as to achieve the purpose of protecting trains and bridges and energy recovery.

Description

Technical Field

[0001] The present application relates to the technical field of bridge structure protection facilities, and particularly relates to an intelligent wind barrier for high-speed railway bridges and a control method for the intelligent wind barrier. Background Art

[0002] Bridges in mountainous and coastal areas often face strong crosswinds. At the same time, as the speed of high-speed trains continues to increase, they become more sensitive to crosswinds. The stability and comfort of trains under the action of strong winds are greatly affected, and it is even possible to cause the train to roll over and capsize. Therefore, the driving safety problem under strong winds is an issue that must be focused on.

[0003] Setting wind barriers on both sides of the line can effectively reduce the impact of crosswinds on trains, thereby improving the driving safety of trains on the bridge in a strong wind environment. However, most of the currently used wind barriers are mainly based on the perforation of the barrier entity, and their cross-sectional ventilation rate is already fixed and cannot be changed after installation.

[0004] For wind barriers with a small ventilation rate, their windward area is large, and a large wind load will be generated on the wind barrier under the action of strong crosswinds, which will then be transmitted to the bridge, bringing potential safety hazards to the bridge structure; for wind barriers with a large ventilation rate, the driving safety of trains on the bridge cannot be guaranteed.

[0005] The wind field in mountainous areas has strong non-stationarity and fast wind speed changes. The existing wind barrier design cannot cope with different wind speed conditions, which will undoubtedly increase the insecurity of the bridge and the trains on the bridge. Summary of the Invention

[0006] In order to be able to cope with the wind fields of different wind speeds in mountainous areas and improve the driving safety of bridges and trains on the bridges, the present application provides an intelligent wind barrier for high-speed railway bridges and a control method for the intelligent wind barrier.

[0007] In a first aspect, the present application provides an intelligent wind barrier for high-speed railway bridges, adopting the following technical solution:

[0008] An intelligent wind barrier for high-speed railway bridges includes a number of support columns arranged on both sides of the bridge along the length direction of the bridge. A wind barrier assembly is provided between two adjacent support columns on the same side. The wind barrier assembly includes a porous wind barrier plate with round holes for withstanding wind pressure and a fan arranged in the round holes. The fan is coaxial with the round hole, the axis of the round hole is perpendicular to the porous wind barrier plate. The porous wind barrier plate is arranged between two adjacent support columns on the same side. The fan is electrically connected to a controller for controlling the rotational speed of the fan, and the controller is electrically connected to a wind speed sensor.

[0009] By adopting the above technical solution, the wind speed sensor can detect the wind speed and transmit it to the controller. The controller controls the speed of the fan according to the detected wind speed, thereby adjusting the ventilation volume through the circular holes, and then can flexibly adjust the air permeability of the wind barrier. It can cope with wind fields with different wind speeds in mountainous areas and reduce the wind load on the wind barrier, thereby improving the safety of the bridge and the train running on the bridge.

[0010] Preferably, the wind turbine is connected to a micro horizontal axis wind turbine for converting wind energy into electrical energy. The micro horizontal axis wind turbine is electrically connected to an energy storage device via a connecting line, and the energy storage device is used to store electrical energy.

[0011] By adopting the above technical solution, when there is no need to adjust the air permeability, the wind drives the fan to rotate, thereby driving the micro horizontal axis wind turbine to generate electricity and store it in the energy storage device, thereby converting wind energy into electrical energy for use, which can save energy.

[0012] Preferably, a connecting plate is fixedly provided on the side of the supporting column away from the bridge, and the connecting plate extends in a direction away from the supporting column. The wind speed sensor is arranged at one end of the connecting plate away from the supporting column. The controller is electrically connected to the energy storage device, and the energy storage device is electrically connected to the wind turbine.

[0013] By adopting the above technical solution, the wind speed sensor is arranged in a direction away from the supporting column by using a connecting plate, which can reduce the influence of the supporting column on the wind speed detected by the wind speed sensor, thereby improving the accuracy of detection.

[0014] Preferably, the controller stores fan speed adjustment data, the fan speed adjustment data including current wind speed information and a fan speed corresponding to the current wind speed information, the wind speed information including wind speed and wind direction.

[0015] By adopting the above technical solution, the controller stores the fan speed adjustment data, which can facilitate matching the corresponding fan speed according to the detected wind speed, thereby facilitating the adjustment of the fan and improving the accuracy of the adjustment.

[0016] Preferably, the circular holes are evenly distributed.

[0017] By adopting the above technical solution, the even distribution of the circular holes can ensure the uniformity of the force on the wind barrier as much as possible, thereby reducing the possibility of damage to the wind barrier due to uneven force.

[0018] Preferably, two symmetrical fans are arranged in each circular hole, and the air outlet sides of the fan surfaces of the two fans are arranged opposite to each other.

[0019] By adopting the above technical solution, the air outlet sides of the two fan surfaces are arranged opposite to each other. When generating electricity by wind power, the wind inside the wind barrier, i.e., the train wind, and the wind outside, i.e., the natural wind, can be collected, and thus the wind energy can be better utilized for power generation.

[0020] Preferably, the controller is electrically connected to a speed sensor for detecting the current speed of the train.

[0021] By adopting the above technical solution, the current speed of the train is detected by the speed sensor and sent to the controller, which facilitates controlling the rotation speed of the fan according to the current speed and can further improve the accuracy of rotation speed adjustment.

[0022] In a second aspect, the present application provides a control method for an intelligent wind barrier, adopting the following technical solution:

[0023] A control method for an intelligent wind barrier, which can be applied to the intelligent wind barrier for a high-speed railway bridge described in any one of the above, includes:

[0024] Obtain the current wind speed value;

[0025] Judge whether the current wind speed value is greater than or equal to a first preset value;

[0026] If the current wind speed value is greater than or equal to the first preset value, obtain a forward rotation instruction to control the fan on the wind barrier to rotate forward;

[0027] If the current wind speed value is less than the first preset value, do not obtain the forward rotation instruction;

[0028] Judge whether the current wind speed value is greater than or equal to a second preset value;

[0029] If the current wind speed value is greater than or equal to the second preset value, obtain a reverse rotation instruction to control the fan to rotate in reverse;

[0030] If the current wind speed value is less than the second preset value, do not obtain the reverse rotation instruction;

[0031] Wherein, the second preset value is greater than the first preset value.

[0032] By adopting the above technical solution, judging whether the current wind speed value is greater than or equal to the first preset value can determine whether the current wind speed will cause vortex-induced vibration, that is, whether the current wind speed is in the vortex-induced vibration wind speed range. If it is greater than or equal to the first preset value, it proves that the current wind speed is in the vortex-induced vibration wind speed range. At this time, a forward rotation instruction is obtained to control the fan to blow air outward to the bridge, thereby disturbing the wind field outside the bridge and dispersing the vortices generated by the separation of the air flow after passing through the air nozzle, and then suppressing the vortex-induced vibration. Judging whether the current wind speed value is greater than or equal to the second preset value can determine whether the current wind speed will cause flutter, that is, whether the current wind speed is in the flutter wind speed range. If it is greater than or equal to the second preset value, it proves that the current wind speed is in the flutter wind speed range. At this time, a reverse rotation instruction is obtained to control the fan to reverse and suck air, so that the mainstream of the oncoming flow is closer to the bridge wall surface, delaying the separation of the flow field around the bridge and reducing the flow resistance around the bridge, and then reducing the probability of flutter generation and improving the wind-induced flutter stability of long-span bridges. Furthermore, the rotation speed and rotation direction of the fan can be controlled according to the magnitude of the real-time wind speed, which are used to adjust the ventilation rate of the wind barrier and achieve active flow control respectively, so that it can cope with different wind speed conditions and improve the safety of the bridge and the train running on the bridge.

[0033] Preferably, after obtaining the reverse rotation instruction to control the reverse rotation of the fan, it further includes:

[0034] Before the train passes through the bridge, obtain the current vehicle speed of the train;

[0035] Judge whether the current vehicle speed is greater than or equal to the preset vehicle speed;

[0036] If the current vehicle speed is greater than or equal to the preset vehicle speed, obtain the suction wind speed entering the wind barrier;

[0037] Judge whether the suction wind speed is greater than or equal to the preset safe wind speed;

[0038] If the suction wind speed is greater than or equal to the safe wind speed, obtain a speed reduction instruction to control the reverse rotation speed of the fan to decrease so that the suction wind speed is less than the safe wind speed.

[0039] By adopting the above technical solution, judging whether the current vehicle speed is greater than or equal to the preset vehicle speed can determine whether it is necessary to adjust the fan rotation speed. When the current vehicle speed is greater than or equal to the preset vehicle speed, it proves that it may be necessary to adjust the fan rotation speed. Therefore, judge whether the suction wind speed is greater than or equal to the safe wind speed, so as to determine whether the current fan rotation speed will affect the driving safety of the train. If the suction wind speed is greater than or equal to the safe wind speed, it proves that it may affect the driving safety of the train. Therefore, at this time, the reverse rotation speed of the fan is reduced, so as to improve the driving safety of the train.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. The wind speed sensor can detect the wind speed and transmit it to the controller. The controller controls the rotation speed of the fan according to the detected wind speed, thereby adjusting the ventilation volume passing through the round holes, and further being able to flexibly adjust the air permeability of the wind barrier, being able to cope with the wind fields of different wind speeds in mountainous areas, reducing the wind load on the wind barrier, and further improving the safety of the bridge and the train running on the bridge;

[0042] 2. By judging the magnitude relationship between the current vehicle speed and the preset vehicle speed, it can be determined whether the current fan rotation speed will affect the driving safety of the train. If the suction wind speed is greater than or equal to the safe wind speed, it proves that it may affect the driving safety of the train. Therefore, at this time, the reverse rotation speed of the fan is reduced, thereby being able to improve the driving safety of the train. Description of the Drawings

[0043] Figure 1 is a schematic structural diagram of an intelligent wind barrier for a high - speed railway bridge provided by an embodiment of the present application;

[0044] Figure 2 is a schematic structural diagram of the installation and layout of an intelligent wind barrier for a high - speed railway bridge on a high - speed railway bridge provided by an embodiment of the present application;

[0045] Figure 3 is a schematic flow diagram of a control method for an intelligent wind barrier provided by an embodiment of the present application;

[0046] Figure 4 is a schematic flow diagram of steps S11 to S15 in an embodiment of the present application;

[0047] Figure 5 is a schematic flow diagram of steps S21 to S27 in an embodiment of the present application;

[0048] Figure 6 is a schematic flow diagram of steps S31 to S34 in an embodiment of the present application;

[0049] Figure 7 is a schematic flow diagram of steps S41 to S46 in an embodiment of the present application;

[0050] Figure 8 is a schematic flow diagram of steps S51 to S53 in an embodiment of the present application;

[0051] Figure 9 is a schematic flow diagram of steps S61 to S62 in an embodiment of the present application.

[0052] Description of the Reference Numerals:

[0053] 1. Support column; 2. Base; 3. Wind barrier assembly; 301. Porous wind barrier panel; 302. Fan; 4. Support short rod; 5. Wind speed sensor. Detailed implementation manners

[0054] The following further describes the present application in conjunction with the attached Figures 1 to 9 drawings for a more detailed explanation.

[0055] Bridges in mountainous areas and coastal areas often face strong crosswinds. At the same time, with the continuous increase in the speed of high-speed trains, they have become more sensitive to crosswinds. The smoothness and comfort of trains under the action of strong winds are greatly affected, and it is even possible to cause the train to roll over and capsize. Therefore, the driving safety problem under strong winds is a problem that must be focused on.

[0056] Setting up wind barriers on both sides of the line can effectively reduce the impact of crosswinds on trains, thereby improving the driving safety of trains on bridges in high-wind environments. However, most of the currently used wind barriers are mainly based on the perforation of the barrier entity, and their cross-sectional ventilation rate has been fixed and cannot be changed after installation.

[0057] For wind barriers with a small ventilation rate, their windward area is relatively large, and a large wind load will be generated on the wind barrier under the action of strong crosswinds, which will then be transmitted to the bridge, posing a safety hazard to the bridge structure; for wind barriers with a large ventilation rate, the driving safety of trains on the bridge cannot be guaranteed.

[0058] The wind field in mountainous areas has strong non-stationarity and rapid wind speed changes. The existing wind barrier designs cannot cope with different wind speed conditions, which will undoubtedly increase the insecurity of bridges and trains on the bridges.

[0059] At the same time, for long-span flexible bridges equipped with wind barriers, the presence of the wind barrier makes them have typical bluff body characteristics. The oncoming flow is easily disturbed by it to generate regular vortex shedding, which may induce the vortex-induced vibration of the bridge. Moreover, in the case of high wind speeds, the bridge may also experience flutter. The wind-induced vibration of the bridge will greatly affect the running smoothness of vehicles and even cause vehicle driving safety accidents. The active flow control method based on suction and blowing can reduce the wind-induced vibration response of the bridge and improve the structural stability of the bridge.

[0060] In addition, with the development of intelligent track systems, more sensors are installed along the track. Coupled with the fact that the power supply in remote mountainous areas is often difficult, converting wind energy into electricity to power the monitoring sensors or other devices along the railway is an effective solution.

[0061] Therefore, the embodiments of the present application disclose an intelligent wind barrier for high-speed railway bridges. Refer to Figure 1 and Figure 2, The intelligent wind barrier for high-speed railway bridges includes: a number of support columns 1 fixedly installed on both sides of the bridge along the length direction of the bridge. A wind barrier assembly 3 is provided between two adjacent support columns 1 on the same side. The support columns 1 are vertically arranged and perpendicular to the upper surface of the bridge. The wind barrier assembly 3 can adjust the air permeability of the wind barrier and can achieve active flow control.

[0062] The wind barrier assembly 3 includes a porous wind barrier plate 301 with round holes for withstanding wind pressure and a fan 302 arranged in the round holes. The fan 302 is coaxial with the round hole, and the axis of the round hole is perpendicular to the porous wind barrier plate 301. The porous wind barrier plate 301 is arranged between two adjacent support columns 1 on the same side. The fan 302 is electrically connected to a controller for controlling the rotational speed of the fan 302, and the controller is electrically connected to a wind speed sensor 5.

[0063] In an implementable manner of this embodiment, the number of round holes can be set according to the size of the porous wind barrier plate 301, and in order to improve the uniformity of the force on the porous wind barrier plate 301 as much as possible, all the round holes are evenly distributed.

[0064] The bottom end of the support column 1 is fixedly connected with a base 2. The base 2 is fixedly connected to the upper surface of the bridge through bolts. The base 2 can support the support column 1 and at the same time facilitate the connection with the bridge, and can improve the stability of the connection between the support column 1 and the bridge.

[0065] During the working process, the wind speed sensor 5 can detect the wind speed and wind direction of the oncoming flow blowing towards the porous wind barrier plate 301, and transmit the detected data to the controller through an electrical signal. The controller can control the rotational speed of the fan 302 according to the detected wind speed and wind direction, so as to adjust the air volume passing through the round holes, and further can flexibly adjust the air permeability of the wind barrier, can cope with different wind speeds in mountainous areas, reduce the wind load on the wind barrier, and further improve the safety of the bridge and the train running on the bridge. At the same time, the controller can adjust the rotational direction of the fan 302 to achieve the control of active flow.

[0066] Furthermore, in another embodiment, a connecting plate is fixedly installed on the side of the support column 1 away from the bridge, and the connecting plate extends in a direction away from the support column 1. The connecting plate includes a horizontal plate perpendicularly and fixedly connected to the support column 1, and a vertical plate perpendicularly and fixedly connected to one end of the horizontal plate away from the support column 1. The vertical plate is parallel to the support column 1, and the wind speed sensor 5 is located at one end of the vertical plate away from the horizontal plate. The wind speed sensor 5 is fixedly installed at one end of the connecting plate away from the support column 1. The controller is electrically connected to an energy storage device through a wire, and the energy storage device is electrically connected to the fan 302 through a wire. Setting the wind speed sensor 5 away from the support column 1 with the connecting plate can reduce the influence of the support column 1 on the wind speed detected by the wind speed sensor 5, and further can improve the detection accuracy.

[0067] Further, in another embodiment, the fan 302 is connected to a micro horizontal axis wind turbine for converting wind energy into electrical energy. The micro horizontal axis wind turbine is electrically connected to an energy storage device through a connecting wire, and the energy storage device is used for storing electrical energy. The energy storage device can be a storage battery. When the fan 302 is not powered on, it will be driven by the wind to drive the blades of the fan 302 to rotate, and then drive the micro horizontal axis wind turbine to rotate for power generation. The micro horizontal axis wind turbine is connected to the energy storage device through a wire, so as to store the generated electrical energy in the energy storage device. Of course, the devices used in the energy storage process are general equipment.

[0068] Of course, a solar panel is also fixedly installed on the porous wind barrier 301 for collecting electrical energy. The solar panel is electrically connected to the energy storage device through a wire. Of course, the converters, inverters, etc. required in the process of generating electrical energy by the solar panel are general devices, and will not be elaborated here. Through the solar panel, the collected solar energy can be converted into electrical energy and stored in the energy storage device, so as to make better use of energy.

[0069] Further, since the blades of the fan 302 are all set at a certain angle, blowing from the air inlet side of the blades of the fan 302 can better drive the fan 302 to rotate, while blowing from the air outlet side of the blades of the fan 302 to drive the fan 302 to rotate has a lower efficiency, and may not even drive the fan 302 to rotate. There will be train wind and natural wind on both sides of the wind barrier. If only one fan 302 is set, the wind energy cannot be better utilized.

[0070] Therefore, in order to make better use of natural energy, two symmetrical fans 302 are arranged in each round hole, and the air outlet sides of the fan surfaces of the two fans 302 are arranged oppositely. That is, when the fans 302 close to the inner side of the porous wind barrier 301 and the fans 302 close to the outer side of the porous wind barrier 301 rotate forward at the same time, the blown air is opposite.

[0071] Combined Figure 2 , when it is not necessary to control the rotation of the fan 302 through the controller, when the natural wind blows towards the wind barrier, it can drive the fan 302 close to the outer side of the wind barrier to rotate, and when the train wind blows towards the wind barrier, it can drive the fan 302 close to the inner side of the wind barrier to rotate, so as to drive the micro horizontal axis wind turbine to rotate for power generation.

[0072] In order to better control the rotation speed of the fan 302, the controller stores fan rotation speed adjustment data, which includes current wind speed information and the corresponding fan rotation speed for the current wind speed information. The wind speed information includes wind speed and wind direction. By storing the fan rotation speed adjustment data, the real-time wind speed and wind direction detected by the wind speed sensor 5 are matched with the wind speed and wind direction in the fan rotation speed adjustment data, so as to obtain the corresponding fan rotation speed and adjust the fan 302 to control the rotation speed and direction of the fan 302, and realize the adjustment of the ventilation rate.

[0073] Furthermore, in order to further improve the accuracy of the fan 302 rotation speed adjustment, the controller is electrically connected to a speed sensor for detecting the current vehicle speed of the train. The speed sensor is arranged at both ends of the bridge, at a position preset distance from the bridge, and the preset distance can be set according to the actual situation, so as to obtain the speed of the train when passing through the bridge.

[0074] When the train speed is detected, the speed sensor transmits the data to the controller, and the controller can further control the rotation speed of the fan 302 according to the train speed.

[0075] The implementation principle of an intelligent wind barrier for a high-speed railway bridge in an embodiment of the present application is as follows: The wind speed sensor 5 detects the wind speed and transmits it to the controller. The controller controls the rotation speed of the fan 302 according to the detected wind speed, so as to adjust the ventilation volume passing through the round holes, and further can flexibly adjust the ventilation rate of the wind barrier, can cope with the wind fields with different wind speeds in mountainous areas, reduce the wind load on the wind barrier, and further improve the safety of the bridge and the train running on the bridge, and can solve the problems existing in the existing bridge wind barriers that the ventilation rate cannot be adjusted after installation, and the presence of the wind barrier makes the bridge have typical bluff body characteristics, which is more likely to induce wind-induced vibration response of the bridge, and a large amount of wind energy is wasted.

[0076] For better illustration, the following will be described in conjunction with a control method of an intelligent wind barrier. The embodiment of the present application also discloses a control method of an intelligent wind barrier, which can be applied to the above-mentioned intelligent wind barrier for a high-speed railway bridge.

[0077] Refer to Figure 3 , the control method of the intelligent wind barrier includes:

[0078] S1. Obtain the current wind speed value;

[0079] The current wind speed value refers to the wind speed of the crosswind blowing from both sides of the bridge to the wind barrier, that is, the crosswind is the wind blowing from both sides of the bridge to the wind barrier. The current wind speed value can be obtained by measuring with a wind speed sensor.

[0080] S2. Determine whether the current wind speed value is greater than or equal to the first preset value;

[0081] The first preset value is the critical value that causes the bridge to undergo vortex-induced vibration. The first preset value can be set according to the different bridges. It is judged whether the current wind speed value is greater than or equal to the first preset value, that is, it is judged whether the current crosswind blowing on the wind barrier will cause the bridge to undergo vortex-induced vibration. If the current wind speed value is greater than or equal to the first preset value, it is proved that vortex-induced vibration is likely to occur, otherwise it will not.

[0082] S3. If the current wind speed value is greater than or equal to the first preset value, obtain a forward rotation instruction to control the fan on the wind barrier to rotate forward;

[0083] When the current wind speed value is greater than or equal to the first preset value, in order to prevent the possibility of vortex-induced vibration as much as possible, at this time, obtain a forward rotation instruction, so as to control the circuit connecting the fan motor to conduct, so as to control the fan to rotate forward, blow the wind from the inner side of the wind barrier to the outer side of the bridge, which can disrupt the wind field outside the bridge section and disperse the vortices generated by the separation of the air flow after flowing through the wind nozzle, thereby reducing the probability of vortex-induced vibration.

[0084] S4. If the current wind speed value is less than the first preset value, do not obtain a forward rotation instruction;

[0085] If the current wind speed value is less than the first preset value, it is proved that vortex-induced vibration is unlikely to occur at this time. Therefore, the fan does not need to rotate at this time, so there is no need to obtain a forward rotation instruction at this time, thus saving electric energy.

[0086] S5. Judge whether the current wind speed value is greater than or equal to the second preset value;

[0087] The second preset value is the critical value that causes the bridge to undergo flutter. The second preset value can be set according to the different bridges. It is judged whether the current wind speed value is greater than or equal to the second preset value, that is, it is judged whether the current wind speed will cause the bridge to undergo flutter. If the current wind speed value is greater than or equal to the second preset value, it is proved that flutter is likely to occur, otherwise it will not.

[0088] S6. If the current wind speed value is greater than or equal to the second preset value, obtain a reverse rotation instruction to control the fan to rotate in reverse;

[0089] When the current wind speed value is greater than or equal to the second preset value, in order to prevent the possibility of flutter as much as possible, at this time, obtain a reverse rotation instruction, so as to control the circuit connecting the fan motor to conduct, so as to control the fan to rotate in reverse to suck air, which can suppress the separation generated by the air flow passing through the blunt body section, make the mainstream closer to the wall surface, improve the wind-induced flutter stability of the long-span bridge, and thus reduce the probability of the bridge undergoing flutter.

[0090] S7. If the current wind speed value is less than the second preset value, do not obtain a reverse rotation instruction;

[0091] If the current wind speed value is less than the second preset value, it proves that galloping is unlikely to occur at this time. Therefore, there is no need for the fan to rotate at this time, so there is no need to obtain a reverse instruction at this time, thus saving electric energy.

[0092] Thus, by the forward or reverse rotation of the fan, the effects of blowing or suction can be achieved, that is, the wind can be blown from the inside of the barrier to the outside of the bridge, or sucked from the outside of the wind barrier to the inside of the bridge. And the second preset value is greater than the first preset value.

[0093] Thus, according to the magnitude of the real-time wind speed, the rotation speed and rotation direction of the fan are controlled to adjust the air permeability of the wind barrier and achieve active flow control respectively, so that it can cope with different wind speed conditions and improve the safety of the bridge and the train running on the bridge.

[0094] Of course, for the case where there are two fans in the round holes, when the fan on the outside of the wind barrier blows air, the fan on the inside sucks air or does not move. When the fan on the inside of the wind barrier blows air, the fan on the outside sucks air or does not move, so as to reduce the probability of incorrect air permeability caused when the two fans work forward or backward at the same time.

[0095] Refer to Figure 4 , since different crosswind speeds have different impacts on the trains passing through the bridge, in order to minimize the probability of danger occurring during the train's travel as much as possible, in another embodiment, after obtaining the reverse instruction to control the fan to reverse, it further includes:

[0096] S11. Before the train passes through the bridge, obtain the current vehicle speed of the train;

[0097] The current vehicle speed of the train can be measured by speed measuring instruments set at two positions in the bridge length direction, that is, speed measuring instruments are set beside the track at a certain distance from the bridge, so that the current vehicle speed can be obtained before the train passes through the bridge.

[0098] S12. Determine whether the current vehicle speed is greater than or equal to the preset vehicle speed;

[0099] The preset vehicle speed can be set according to the actual situation, such as the critical value at which a train will be in danger due to crosswind according to the local average wind speed. If the current vehicle speed is greater than or equal to the preset vehicle speed, it proves that the train is likely to be affected by the crosswind, and if the current vehicle speed is less than the preset vehicle speed, it proves that the train will not be affected by the crosswind.

[0100] S13. If the current vehicle speed is greater than or equal to the preset vehicle speed, obtain the suction wind speed entering the wind barrier;

[0101] If the current vehicle speed is less than the preset vehicle speed, no adjustment is required. However, if the current vehicle speed is greater than or equal to the preset vehicle speed, in order to ensure the driving safety of the train as much as possible, it is necessary to ensure that the wind speed entering the wind barrier is relatively low. Therefore, the wind speed entering the wind barrier is obtained at this time. Due to the shielding of the wind barrier, the wind speed entering the wind barrier is mainly generated by the reverse suction of the fan. Therefore, the wind speed entering the wind barrier is the suction wind speed, and the acquisition method can also be measured by a wind speed sensor arranged on the inner side of the wind barrier near the fan.

[0102] S14. Determine whether the suction wind speed is greater than or equal to the preset safe wind speed;

[0103] Among them, the safe wind speed refers to the critical value of the wind speed that will cause the train to tip over at the current vehicle speed of the train. Judging whether the suction wind speed is greater than or equal to the safe wind speed is to judge whether the train will tip over or other dangers at the current vehicle speed and the current suction wind speed. If the suction wind speed is greater than or equal to the safe wind speed, there is a high probability of danger. Otherwise, there is a low probability of danger.

[0104] S15. If the suction wind speed is greater than or equal to the safe wind speed, obtain a speed reduction command to control the reverse speed of the fan to decrease so that the suction wind speed is less than the safe wind speed.

[0105] Therefore, if the suction wind speed is less than the safe wind speed, the rotation speed of the fan can be not adjusted. However, if the suction wind speed is greater than or equal to the safe wind speed, in order to ensure the driving safety of the train as much as possible, a speed reduction command is obtained at this time, and the reverse speed of the fan is controlled according to the speed reduction command to decrease, so that when the train passes through the bridge, the suction wind speed in the bridge is less than the safe wind speed, and the driving safety of the train is ensured as much as possible.

[0106] Of course, the way to obtain the speed reduction command can be to obtain the wind speed difference according to the suction wind speed and the safe wind speed, and according to the wind speed difference and the corresponding relationship between the rotation speed of the preset fan and the wind speed, obtain the rotation speed of the fan, then according to the relationship between the rotation speed of the preset fan and the magnitude of the energizing current, obtain the energizing current value, and store the energizing current value in the speed reduction command. Furthermore, by adjusting the energizing current value passing through the fan, the rotation speed of the fan is adjusted, and then the suction wind speed is adjusted.

[0107] Refer to Figure 5 , in order to further reduce the influence of other external environments such as rainfall on the train driving and ensure the driving safety of the train as much as possible, in another embodiment, judging whether the suction wind speed is greater than or equal to the safe wind speed includes:

[0108] S21. Obtain the current weather condition of the bridge;

[0109] It can be detected by a rain sensor set around the bridge. Among them, the current weather condition includes rainy weather and non-rainy weather. If the rain sensor detects rain, it proves that it is rainy weather, otherwise it is non-rainy weather.

[0110] S22. When the current weather condition is rainy weather, obtain the current rainfall amount;

[0111] If it is non-rainy weather, the impact of rainfall does not need to be considered, so no other operations are required. If the current weather condition is rainy weather, obtain the current rainfall amount. The obtaining method can be detected by a rain sensor, that is, detect how much rain falls within a preset time period to determine the rainfall amount. The preset time period can be set as needed.

[0112] S23. Obtain the rainfall speed information;

[0113] Among them, the rainfall speed information is pre-stored data information, including the train speed, multiple predicted rainfall amounts corresponding to the train speed, and the safe crosswind speed corresponding to the predicted rainfall amount.

[0114] S24. Based on the current vehicle speed, current rainfall amount and rainfall speed information, obtain the corresponding safe crosswind speed as the comparison wind speed;

[0115] That is, match the current vehicle speed with the train speed, that is, obtain the difference between the current vehicle speed and the train speed. If the difference is within the error range, it proves that they match, so as to obtain the corresponding predicted rainfall amount. Then match the current rainfall amount with the predicted rainfall amount. The predicted rainfall amount can be a range value. If the current rainfall amount is within the range value, that is, they match, so as to obtain the safe crosswind speed corresponding to the predicted rainfall amount, that is, the comparison wind speed. Among them, the safe crosswind speed is the critical value of rollover during the train's driving under the premise of each train speed and each predicted rainfall amount.

[0116] S25. Judge whether the suction wind speed is greater than or equal to the comparison wind speed;

[0117] That is, judge whether the current vehicle speed, current rainfall amount, and current suction wind speed will cause dangerous situations for the train. If the suction wind speed is greater than or equal to the comparison wind speed, it proves that danger is likely to occur. Otherwise, it proves that danger is unlikely to occur.

[0118] S26. If so, determine that the suction wind speed is greater than or equal to the safe wind speed;

[0119] S27. If not, determine that the suction wind speed is less than the safe wind speed.

[0120] Therefore, if the inhalation wind speed is greater than or equal to the comparison wind speed, it proves that the inhalation wind speed is greater than or equal to the safety wind speed, where the safety wind speed is the corresponding matched comparison wind speed. If the inhalation wind speed is less than the comparison wind speed, it proves that the inhalation wind speed is less than the safety wind speed. Thus, by jointly judging the rainfall, wind speed and vehicle speed, the relationship between the inhalation wind speed and the safety wind speed can be determined, which can further improve the accuracy of the inhalation wind speed adjustment and reduce the probability of dangerous situations.

[0121] Reference Figure 6 In order to minimize the possibility of train rollover, reducing the fan speed may cause bridge flutter, and the time taken by the train to pass the bridge is short. Therefore, in order to reduce the impact of adjusting the fan speed on the bridge, in another embodiment, after obtaining the speed reduction instruction to control the fan's reverse speed to reduce so that the suction wind speed is less than the safe wind speed, it also includes:

[0122] S31. Get the train's running image;

[0123] The data can be obtained by shooting with cameras installed at both ends of the bridge.

[0124] S32. Determine whether the train passes through the bridge based on the driving image;

[0125] Through image recognition, it is determined whether there is a train in the driving images taken by the cameras at both ends. If not, it proves that the train has passed the bridge, otherwise it proves that it has not passed.

[0126] Of course, in his implementation method, the method of judging whether the train passes through the bridge can also be monitored by sensors, and the train's travel time can be determined based on the train's speed and the length of the bridge. Then, the time when the train enters the bridge and the current time are recorded, and the difference between the two is obtained. If the difference is greater than the travel time, it proves that the bridge has been passed, otherwise it has not.

[0127] S33. If the train passes through the bridge, a recovery instruction is obtained;

[0128] If the train has not passed the bridge, no other operations are required at this time. If the train has passed the bridge, a recovery instruction is obtained, wherein the recovery instruction includes an initial speed, and the initial speed is the suction wind speed before the speed reduction instruction is obtained.

[0129] S34. Based on the recovery instruction, the suction wind speed is controlled to recover the initial speed.

[0130] Then, according to the recovery instruction, control the suction air speed to recover to the initial speed, that is, adjust the rotational speed of the fan to the speed before the reduction, so as to ensure the safety of the train passing through the bridge as much as possible, and at the same time ensure the safety of the bridge after the train passes through the bridge as much as possible.

[0131] Refer to Figure 7 , in another embodiment, after obtaining the current vehicle speed of the train, it further includes:

[0132] S41. Obtain the preset speed information;

[0133] Among them, the speed information includes the train running speed and the crosswind speed corresponding to the train running speed, that is, the speed information is the data pre-stored in the system, the train running speed and the crosswind speed corresponding to the train running speed are the data obtained through experiments or calculations, and the crosswind speed is the critical value of the maximum wind speed at which the train is at risk of rolling over at the current train running speed.

[0134] S42. Obtain the corresponding crosswind speed based on the current vehicle speed and the speed information as the adjusted wind speed;

[0135] That is, match the current vehicle speed with the train running speed to obtain the crosswind speed corresponding to the matched train running speed, that is, the adjusted wind speed. The matching method can also be to obtain the difference between the current vehicle speed and the train running speed. If the difference is within the error range, it is considered a match, otherwise it is not a match.

[0136] S43. Obtain the suction air speed entering the wind barrier;

[0137] The suction air speed can be obtained by measuring with a wind speed sensor, that is, the wind speed entering the wind barrier through the fan.

[0138] S44. Determine whether the suction air speed matches the adjusted wind speed;

[0139] The determination method can also be to obtain the difference between the suction air speed and the adjusted wind speed and determine whether the difference is within the error range. If it is within the error range, it proves a match, otherwise it is not a match. Of course, all the error values in this application can be set according to the actual situation.

[0140] S45. If they do not match, obtain the wind speed difference based on the adjusted wind speed and the suction air speed;

[0141] If the suction wind speed matches the adjusted wind speed, it proves that the train is unlikely to be in danger at the current suction wind speed, so no other operations are required. If they do not match, it proves that the current suction wind speed may cause danger during the train's operation. Therefore, at this time, the wind speed difference is obtained based on the adjusted wind speed and the suction wind speed, that is, the absolute value of the difference obtained by subtracting the suction wind speed from the adjusted wind speed is the wind speed difference.

[0142] S46. Obtain an adjustment instruction based on the wind speed difference to make the suction wind speed match the adjusted wind speed.

[0143] That is, the adjustment instruction includes the wind speed difference, and based on the relationship between the wind speed difference and the rotational speed of the fan, and the relationship between the rotational speed of the fan and the current value, the current value passing through the fan is adjusted, thereby reducing or increasing the rotational speed of the fan to make the suction wind speed match the adjusted wind speed. Thus, it is possible to minimize the impact of crosswind on the safety of the train during operation and ensure the driving safety of the train as much as possible.

[0144] Of course, in another implementable manner of this embodiment, the wind speed difference can also be the difference obtained by subtracting the suction wind speed from the adjusted wind speed. If the difference is positive, it proves that the suction wind speed will not cause the train to tip over, so no adjustment is required at this time. If the difference is negative and the absolute value of the negative value is greater than the error value, it proves that the suction wind speed is greater than the adjusted wind speed. At this time, an adjustment instruction is obtained to adjust the rotational speed of the fan to make the suction wind speed match the adjusted wind speed.

[0145] Refer to Figure 8 , in order to make the rotational speed of the fan match the current wind speed value as much as possible, thereby minimizing the possibility of vortex-induced vibration and flutter, in another embodiment, after obtaining the reverse instruction, it further includes:

[0146] S51. Obtain rotational speed information;

[0147] Among them, the rotational speed information includes the rotational speed of the fan and the wind speed threshold corresponding to the rotational speed. The wind speed threshold refers to the wind speed value greater than or equal to the critical value that can cause the bridge to vibrate or flutter due to vortex-induced vibration. For different wind speed thresholds, there are different rotational speeds, so as to adjust the ventilation rate of the wind barrier and thus ensure that the bridge does not vibrate or flutter due to vortex-induced vibration as much as possible.

[0148] S52. Obtain the corresponding rotational speed based on the current wind speed value and the rotational speed information as the matching speed;

[0149] That is, the current wind speed value is matched with the wind speed threshold, and then the rotational speed corresponding to the matched wind speed threshold is obtained, that is, the matching speed. The matching method of the current wind speed value and the wind speed threshold is the same as the matching method of the current vehicle speed and the train operation speed.

[0150] S53. Obtain a speed regulation command based on the matching speed so that the wind speed of the fan is equal to the matching speed.

[0151] That is, the speed regulation command includes the matching speed. Then, according to the relationship between the matching speed and the rotational speed of the fan, and the relationship between the rotational speed of the fan and the current value, adjust the current value passing through the fan so that the wind speed of the fan is equal to the matching speed, thereby enabling the fan to better match the current wind speed value and minimizing the impact of crosswind on the bridge and the train.

[0152] Refer to Figure 9 , in another embodiment, for the convenience of energy storage, it further includes:

[0153] S61. When the fan rotates forward or backward, obtain an energy storage command;

[0154] S62. Based on the energy storage command, store the electric energy generated by the fan driving a preset generator to rotate.

[0155] Specifically, a small generator is also provided on the rotating shaft of the fan. When the fan rotates forward or backward, an energy storage command is obtained. The energy storage command includes an energization command, which can control the switch connecting the generator and the energy storage battery to be turned on, thereby enabling the storage of electric energy. That is, the energy storage command stores the electric energy generated by the fan driving a preset generator to rotate, which can save energy, and the stored energy can be used as a backup power source.

[0156] Moreover, the forward or backward rotation of the fan can be driven by the start of the fan motor to drive the fan to rotate, and then drive the generator to generate electric energy. It can also be driven by crosswind when the crosswind does not affect the train's travel, that is, the crosswind that does not meet the condition of controlling the fan motor to be energized and started, drives the fan to rotate, and then drives the generator to generate electric energy.

[0157] In an implementable manner of this embodiment, each fan in each round hole is controlled by a separate controller. Of course, it can also be that the fans on the same side of the same row are controlled by the same controller, and the fans in different horizontal rows are controlled by different controllers.

[0158] The implementation principle of a control method for an intelligent wind barrier in an embodiment of this application is as follows: Determine whether the current wind speed value is greater than or equal to a first preset value, which can determine whether the current wind speed will cause vortex-induced vibration, that is, whether the current wind speed is within the vortex-induced vibration wind speed range. If it is greater than or equal to the first preset value, it proves that the current wind speed is within the vortex-induced vibration wind speed range. At this time, obtain a forward rotation instruction to control the fan to blow air outward towards the outside of the bridge, thereby disturbing the wind field outside the bridge and dispersing the vortices generated by the separation of the air flow after passing through the wind nozzle, and then suppressing vortex-induced vibration. Determine whether the current wind speed value is greater than or equal to a second preset value, which can determine whether the current wind speed will cause flutter, that is, whether the current wind speed is within the flutter wind speed range. If it is greater than or equal to the second preset value, it proves that the current wind speed is within the flutter wind speed range. At this time, obtain a reverse rotation instruction to control the fan to rotate in reverse to suck air, so that the mainstream of the oncoming flow is closer to the bridge wall surface, delay the separation of the flow field around the bridge, reduce the flow resistance around the bridge, and then reduce the probability of flutter generation and improve the wind-induced flutter stability of long-span bridges. Furthermore, it is possible to control the rotation speed and rotation direction of the fan according to the magnitude of the real-time wind speed, which are used to adjust the ventilation rate of the wind barrier and achieve active flow control respectively, so that it can cope with different wind speed conditions and improve the safety of the bridge and the train running on the bridge.

[0159] The above are all preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An intelligent wind barrier for high - speed railway bridges, characterized in that: It includes a number of support columns (1) arranged on both sides of the bridge along the length direction of the bridge. A wind barrier assembly (3) is provided between two adjacent support columns (1) on the same side. The wind barrier assembly (3) includes a porous wind barrier plate (301) with round holes for withstanding wind pressure and a fan (302) arranged in the round holes. The fan (302) is coaxial with the round hole, and the axis of the round hole is perpendicular to the porous wind barrier plate (301). The porous wind barrier plate (301) is arranged between two adjacent support columns (1) on the same side. The fan (302) is electrically connected to a controller for controlling the fan speed of the fan (302), and the controller is electrically connected to a wind speed sensor (5).

2. The wind barrier according to claim 1, wherein: The fan (302) is connected to a micro horizontal axis wind turbine for converting wind energy into electrical energy. The micro horizontal axis wind turbine is electrically connected to an energy storage device through a connecting wire, and the energy storage device is used for storing electrical energy.

3. The wind barrier according to claim 2, wherein: A connecting plate is fixedly provided on the side of the support column (1) away from the bridge. The connecting plate extends in a direction away from the support column (1). The wind speed sensor (5) is arranged at one end of the connecting plate away from the support column (1). The controller is electrically connected to the energy storage device, and the energy storage device is electrically connected to the fan (302).

4. The wind barrier according to claim 1, wherein: The controller stores fan speed adjustment data, which includes current wind speed information and the corresponding fan speed for the current wind speed information. The wind speed information includes wind speed and wind direction.

5. The wind barrier according to claim 1, characterized in that: The round holes are evenly distributed.

6. The wind barrier according to claim 1, characterized in that: Two symmetric fans (302) are arranged in each round hole, and the air outlet sides of the fan surfaces of the two fans (302) are arranged opposite to each other.

7. The wind barrier according to claim 1, characterized in that: The controller is electrically connected to a speed sensor for detecting the current vehicle speed of the train.

8. A control method for an intelligent wind barrier, which can be applied to the intelligent wind barrier for high-speed railway bridges as described in any one of claims 1 to 6, characterized in that, It includes: Obtain the current wind speed value; Judge whether the current wind speed value is greater than or equal to a first preset value; If the current wind speed value is greater than or equal to the first preset value, obtain a forward rotation instruction to control the fan (302) on the wind barrier to rotate forward; If the current wind speed value is less than the first preset value, do not obtain the forward rotation instruction; Judge whether the current wind speed value is greater than or equal to a second preset value; If the current wind speed value is greater than or equal to the second preset value, obtain a reverse rotation instruction to control the fan (302) to rotate in reverse; If the current wind speed value is less than the second preset value, do not obtain the reverse rotation instruction; Wherein, the second preset value is greater than the first preset value.

9. The control method according to claim 8, characterized in that After obtaining the reverse rotation instruction to control the fan (302) to rotate in reverse, it further includes: Before the train passes through the bridge, obtain the current vehicle speed of the train; Judge whether the current vehicle speed is greater than or equal to a preset vehicle speed; If the current vehicle speed is greater than or equal to the preset vehicle speed, obtain the suction wind speed entering the wind barrier; Judge whether the suction wind speed is greater than or equal to a preset safe wind speed; If the suction wind speed is greater than or equal to the safe wind speed, obtain a speed reduction instruction to control the reverse rotation speed of the fan (302) to decrease so that the suction wind speed is less than the safe wind speed.

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