CN112048985A - Bridge stress control system for suppressing vortex vibration - Google Patents
Bridge stress control system for suppressing vortex vibration Download PDFInfo
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- CN112048985A CN112048985A CN202011026654.3A CN202011026654A CN112048985A CN 112048985 A CN112048985 A CN 112048985A CN 202011026654 A CN202011026654 A CN 202011026654A CN 112048985 A CN112048985 A CN 112048985A
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- 238000001514 detection method Methods 0.000 claims abstract description 104
- 238000006073 displacement reaction Methods 0.000 claims abstract description 51
- 230000007246 mechanism Effects 0.000 claims description 79
- 239000000725 suspension Substances 0.000 claims description 14
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
Abstract
The invention discloses a bridge stress control system for inhibiting vortex vibration, which comprises a logic control unit, a tuyere unit and a wind power detection unit, wherein the logic control unit is used for controlling the wind power detection unit; the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge and provide vertical acting force for the bridge; the wind power detection units are distributed at the upper part and the lower part of the bridge to detect the wind direction and the wind speed; the logic control unit controls the rotation angle of the tuyere unit according to the detected wind speeds of the upper part and the lower part of the bridge; the first stress detection unit can be arranged to detect the vertical stress of the bridge or the displacement detection unit can be arranged to detect the strain of the bridge to control the tuyere unit; and the two sides of the bridge girder can be provided with transverse flow guide units which are matched with the tuyere units to carry out wind power regulation and control. According to the invention, the rotation angle of the tuyere unit or the transverse flow guide unit can be correspondingly adjusted by the logic control unit according to parameters such as wind speed, stress, strain and the like, so that the stress and strain in the bridge are controlled by fully utilizing natural wind, the use safety and the service life of the bridge are improved, and the safety coefficient of the bridge is improved.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a bridge stress control system for inhibiting vortex vibration.
Background
Suspension bridges, also known as suspension bridges, refer to bridges in which cables (or steel chains) suspended by cable towers and anchored to both banks (or ends of the bridge) serve as the main load-bearing members of the superstructure. The cable geometry is determined by the equilibrium condition of the forces, typically approaching a parabola. A plurality of suspension rods are suspended from the cable to suspend the deck, and stiffening beams are often disposed between the deck and the suspension rods to form a combined system with the cable to reduce deflection deformation caused by loading. The suspension bridge can fully utilize the strength of materials, has the characteristics of material conservation and light dead weight, and is particularly suitable for the conditions of large span or difficult pier establishment. However, due to the fact that the structural rigidity of the suspension bridge is small, vortex vibration is easy to generate under the action of load, particularly under the action of wind load, large stress is brought to the bridge, and the bridge is vibrated, so that wind-induced stability is an important control factor for bridge construction, particularly suspension bridge construction.
In the prior art, the shape of the cross section of the stiffening beam is adjusted by pneumatic model selection and pneumatic optimization, for example, additional flow guide devices such as a flow guide plate, a tuyere or a flow restraining plate are added, so that the purpose of restraining the regular vortex shedding on the surface of the stiffening beam can be achieved, the internal stress action of the bridge is reduced, and the flutter stability of the suspension bridge is improved. Based on this, the patent document with application number 201621413540.3 discloses a tuyere structure for vortex vibration control of a split-type double-box girder bridge, the cross section of the tuyere structure mainly consists of a trapezoid and a triangle, the lower bottom of the trapezoid is connected with a main girder of the bridge, and the upper bottom of the trapezoid is connected with the shortest side of the triangle; the triangle is a right-angle triangle, and the hypotenuse of the right-angle triangle is positioned below the long right-angle side; the tuyere structure is composed of a thin-wall steel box; so as to reduce the vortex-induced resonance amplitude of the bridge and improve the safety of the bridge structure. However, the diversion form of the scheme is relatively fixed, adjustability or controllability is lacked for the change of the actual wind-induced vibration of the built bridge, the vibration suppression effect is not prominent, and the safety coefficient of the bridge is low.
Disclosure of Invention
In view of the above, it is necessary to provide a bridge stress control system for suppressing vortex vibration based on the detection of the difference between the wind nozzle unit and the wind speed, which can actively adjust the angle of the wind nozzle according to the wind speed and the wind direction, thereby improving the safety factor of the bridge; the bridge stress control system based on the tuyere unit and the bridge stress detection can actively adjust the angle of the tuyere according to the tension value borne by the suspender, so that the safety coefficient of the bridge is improved; and a bridge stress control system based on tuyere unit and bridge displacement detection can actively adjust tuyere angle according to bridge tower longitudinal displacement, and improve bridge safety factor.
The invention is realized by the following technical scheme:
a bridge stress control system for suppressing vortex vibration comprises a logic control unit, a plurality of air nozzle units and a plurality of wind power detection units;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the wind power detection units are distributed at the upper part and the lower part of the bridge and used for detecting the wind direction and the wind speed;
the air nozzle unit and the wind power detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the wind speeds of the upper part and the lower part of the bridge detected by the wind power detection unit.
In one embodiment, when the bridge is a suspension bridge, the bridge further comprises a plurality of first stress detection units, and the first stress detection units are distributed on the bridge suspender and used for detecting the tensile force applied to the bridge suspender;
the first stress detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the tension detected by the first stress detection unit.
In one embodiment, the device further comprises a displacement detection unit, wherein the displacement detection unit is arranged at the upper part of the bridge pylon and is used for detecting the bridge longitudinal displacement of the upper part of the bridge pylon;
the displacement detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the bridge longitudinal displacement amount of the upper part of the bridge tower detected by the displacement detection unit.
A bridge stress control system for inhibiting vortex vibration is characterized in that a bridge is a suspension bridge and comprises a logic control unit, a plurality of air nozzle units and a plurality of first stress detection units;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the first stress detection unit is distributed on the bridge suspender and used for detecting the tensile force applied to the bridge suspender;
the air nozzle unit and the first stress detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the tension detected by the first stress detection unit.
A bridge stress control system for suppressing vortex vibration comprises a logic control unit, a displacement detection unit and a plurality of tuyere units;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the displacement detection unit is arranged at the upper part of the bridge tower and is used for detecting the bridge longitudinal displacement at the upper part of the bridge tower;
the air nozzle unit and the displacement detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the bridge longitudinal displacement amount of the upper part of the bridge tower detected by the displacement detection unit.
In one embodiment, the tuyere unit comprises a driving plate, a driven plate and a first driving mechanism, wherein the driving plate is connected with the first driving mechanism and driven by the first driving mechanism to rotate by taking the longitudinal direction of the bridge as an axis;
the driven plates are arranged on the upper side and the lower side of the driving plate, one end of each driven plate is movably connected with the main beam of the bridge, and the other end cover of each driven plate is arranged on the driving plate and can slide along the driving plate.
In one embodiment, the wind power generation system further comprises a plurality of transverse flow guiding units, wherein the transverse flow guiding units are arranged on two sides of the main beam of the bridge at intervals along the longitudinal direction of the bridge and used for offsetting horizontal acting force caused by wind load;
the transverse flow guide unit comprises a second driving mechanism and a first flow guide plate, the first flow guide plate is connected with the second driving mechanism, and the transverse flow guide unit is driven by the second driving mechanism to rotate by taking the vertical direction of the bridge as an axis;
the horizontal diversion unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the horizontal diversion unit according to the wind speed detected by the wind power detection unit.
In one embodiment, the transverse diversion unit further comprises a third driving mechanism, the third driving mechanism is connected with the second driving mechanism, and the third driving mechanism is driven by the second driving mechanism to rotate by taking the vertical direction of the bridge as an axis; the first guide plate is connected with the third driving mechanism and driven by the third driving mechanism to rotate by taking the bridge transversely as an axis.
In one embodiment, the transverse flow guide unit further comprises a fourth driving mechanism and a second flow guide plate, the fourth driving mechanism is connected with the second driving mechanism, and the fourth driving mechanism is driven by the second driving mechanism to rotate by taking the vertical direction of the bridge as an axis; the second guide plate is connected with the fourth driving mechanism and driven by the fourth driving mechanism to rotate by taking the longitudinal direction of the bridge as an axis.
In one embodiment, the system further comprises a plurality of second stress detection units, wherein the second stress detection units are distributed on the bridge girder and used for detecting the stress applied to the bridge girder;
the second stress detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the transverse diversion unit according to the stress detected by the second stress detection unit.
Compared with the prior art, the technical scheme of the invention at least has the following advantages and beneficial effects:
according to the invention, the wind direction and the wind speed of the upper part and the lower part of the bridge are detected by the wind detection unit, and the wind speed is transmitted to the logic control unit, and the logic control unit adjusts the rotation angle of the tuyere unit according to the wind speed difference of the upper part and the lower part of the bridge, so that the vertical pressure or the vertical lift force caused by the wind speed difference is partially eliminated, the vortex vibration influence caused by wind load is inhibited, and the safety coefficient of the bridge is improved.
According to the invention, the first stress detection unit is used for detecting the tensile force applied to the bridge suspender and transmitting the tensile force value to the logic control unit, the logic control unit adjusts the rotation angle of the tuyere unit according to the tensile force value, and a certain vertical acting force is provided for the bridge by using wind load, so that the load borne by the bridge suspender is reduced, and the safety coefficient of the bridge is improved.
According to the invention, the displacement detection unit is used for detecting the longitudinal displacement of the bridge at the upper part of the bridge tower and transmitting the longitudinal displacement of the bridge to the logic control unit, the logic control unit is used for adjusting the rotation angle of the tuyere unit according to the longitudinal displacement of the bridge, a certain vertical acting force is provided for the bridge by utilizing wind load, the load born by the bridge is reduced, and the safety coefficient of the bridge is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a general layout diagram of a bridge stress control system according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a main beam section of a bridge according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view at A in FIG. 2;
FIG. 4 is an enlarged schematic view at B of FIG. 2;
fig. 5 is a schematic structural diagram of another transverse flow guide unit according to an embodiment of the present invention.
Icon: 1-tuyere unit, 11-driving plate, 12-driven plate, 13-first driving mechanism, 131-first motor, 132-second rotating shaft, 14-torsion spring, 2-wind force detection unit, 3-first stress detection unit, 4-displacement detection unit, 5-transverse flow guide unit, 51-second driving mechanism, 511-second motor, 512-second rotating shaft, 52-first flow guide plate, 53-third driving mechanism, 531-third motor, 532-third rotating shaft, 54-fourth driving mechanism, 541-fourth motor, 542-fourth rotating shaft, 55-second flow guide plate, 6-second stress detection unit, 100-main beam, 200-bridge tower, 300-bridge cable, 400-bridge hanger rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, a bridge stress control system for suppressing vortex vibration will be described more clearly and completely with reference to the accompanying drawings in the following embodiments of the present invention. The preferred embodiments of the bridge stress control system are shown in the drawings, however, the bridge stress control system may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, when used in reference to an orientation or positional relationship indicated in the drawings, or as otherwise customary for use in the practice of the invention, are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
In the description of the present invention, it should be further noted that the terms "disposed," "mounted," "connected," and "connected" used herein should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It can be understood that, in the present scheme, the longitudinal direction of the bridge refers to the length direction of the bridge; the transverse direction of the bridge refers to the width direction of the bridge; the vertical direction of the bridge refers to the vertical direction of the bridge.
As shown in fig. 1 and 2, the present invention provides a bridge stress control system for suppressing vortex vibration, which includes a logic control unit (not shown in the figure), a plurality of tuyere units 1 and a plurality of wind force detection units 2; the tuyere units 1 are arranged on two sides of the bridge girder 100 in parallel along the longitudinal direction of the bridge, are connected with the bridge girder 100, and can rotate by taking the longitudinal direction of the bridge as an axis at the connection end of the tuyere units and the bridge girder 100; the wind power detection units 2 are distributed at the upper part and the lower part of the bridge and used for detecting the wind direction and the wind speed; the air nozzle unit 1 and the wind force detection unit 2 are respectively connected with a logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit 1 according to the wind speeds of the upper part and the lower part of the bridge detected by the wind force detection unit 2.
Specifically, the wind detecting unit 2 may be a wind speed detector, and when the wind detecting unit 2 detects wind directions and wind speeds at the upper part and the lower part of the bridge, the obtained wind direction data and wind speed data are transmitted to the logic control unit, it can be understood that the logic control unit can perform parameter identification on the wind direction data and the wind speed data transmitted by the wind detecting unit 2, and obtain and output corresponding control signals to the tuyere unit 1 through an algorithm, so that the corresponding tuyere unit 1 can perform real-time feedback motion. The control of the logical control unit to the tuyere units 1 can be to each tuyere unit 1 individually control, also can be to a plurality of continuous tuyere units 1 segment by segment control to carry out reasonable angle adjustment according to different wind speeds at different segment sections, can also carry out overall control to all tuyere units 1.
For example, when the wind speed at the upper part of the bridge is higher than that at the lower part of the bridge (for example, the wind speed at the upper part of the bridge is 14M/S, and the wind speed at the lower part of the bridge is 5M/S), the tuyere unit 1 at the windward side is controlled to rotate upwards (for example, the tuyere unit 1 rotates upwards for 30 degrees along the connecting end of the main beam 100 of the bridge), so that wind load impacts the lower side surface of the tuyere unit 1 at the windward side, a certain vertical lift force is provided for the bridge, and vertical pressure caused by high wind speed at the upper side is; and vice versa. When the wind speeds on the left side and the right side of the bridge are different, corresponding angle adjustment is carried out according to the corresponding upper wind speed difference and lower wind speed difference on the left side and the right side, namely the larger the corresponding upper wind speed difference and lower wind speed difference on the side where the wind speed difference is, the larger the adjustment amplitude of the tuyere unit 1 is; if the wind speeds on the left side and the right side of the upper part of the bridge are consistent and are greater than the wind speed on the lower part of the bridge, and the wind speed on the left side of the lower part of the bridge is less than the wind speed on the right side of the lower part of the bridge (if the wind speeds on the left side and the right side of the upper part of the bridge are consistent and are 14M/S, the wind speed on the left side of the lower part of the bridge is 5M/S, and the wind speed on the right side of the lower part of the bridge is 8M/S), the wind nozzle unit 1 on the left side of the windward side is controlled to rotate upwards, the rotation amplitude of the wind nozzle unit 1 on the right side of the windward side is controlled to be greater than the rotation amplitude of the wind nozzle unit 1 on the right side (if. It is to be understood that the specific numerical values set forth above in parentheses are assumed and are intended to be merely illustrative of the text outside the parenthesis.
It is understood that, in general, the above-described suppression effect can be achieved by adjusting only the tuyere unit 1 on the windward side; and the air nozzle unit 1 on the leeward side is adjusted through a more complex control algorithm, so that a better technical effect can be achieved. For example, in the vertical direction, when the wind speed at the upper part of the bridge is greater than that at the lower part of the bridge, the tuyere unit 1 at the windward side is controlled to rotate upwards, and the tuyere unit 1 at the leeward side is controlled to rotate downwards, so that both sides of the bridge girder 100 can obtain a certain vertical lift force, and vertical pressure caused by high wind speed at the upper side is better offset. In addition, aiming at the vortex-induced resonance phenomenon caused by the consistency of the natural vibration frequency and the wind vibration frequency of the bridge under a specific and stable wind speed, the wind-borne vibration frequency of the bridge can be changed and the resonance can be eliminated by actively controlling the rotation angle of the tuyere unit 1; the active control mode includes, but is not limited to, setting a preset duration in the logic control unit, monitoring the wind speed data provided by the wind power detection unit 2 through the logic control unit, and outputting a control signal to the tuyere unit 1 to actively change the rotation angle of the tuyere unit 1 when the wind speed at the upper and lower parts of the bridge is continuously stable and the duration exceeds the preset duration, so as to change the stress condition of the bridge.
It is also understood that the above-mentioned bridge upper portion includes an upper portion of the bridge pylon 200, such as a top portion of the bridge pylon 200, an upper half of the bridge pylon 200 with the bridge deck as a demarcation point, and the like; the lower portion of the bridge includes the lower portion of the bridge pylon 200 (e.g., the lower half of the bridge pylon 200 at the point of separation from the deck) and/or the sides of the bridge girders 100. Moreover, when the wind detecting unit 2 is disposed at the side of the bridge girder 100, the wind detecting unit 2 can be disposed at one quarter, one half and three quarters of the installation section, respectively, with the distance between every two bridge towers 200 as the installation section, so as to measure the wind speed accurately in a sectional manner.
Further, as shown in fig. 1 to 3, in the present embodiment, the tuyere unit 1 includes a driving plate 11, a driven plate 12 and a first driving mechanism 13, the first driving mechanism 13 may be a combination of a power source (e.g., a first motor 131) and a rotating shaft (e.g., a second rotating shaft 132) which are in transmission connection through a gear or a belt, the rotating shaft of the first driving mechanism 13 is disposed along the longitudinal direction of the bridge, the axial center thereof is parallel to the longitudinal direction of the bridge, one side of the driving plate 11 is fixedly connected to the rotating shaft of the first driving mechanism 13, and is driven by the power source of the first driving mechanism 13 to rotate with the longitudinal direction of the bridge as the axial center; the driving plate 11 is streamline, and one end of the driving plate, which is far away from the bridge girder 100, is in an acute angle shape, so that airflow can flow to the upper side and the lower side of the bridge girder 100 along with the driving plate 11; the driven plate 12 is arranged on the upper side and the lower side of the driving plate 11, one end of the driven plate is movably connected with the bridge girder 100, the other end cover of the driven plate 12 is arranged on the driving plate 11 and is tightly attached to the driving plate 11 and can slide along the driving plate 11, if the torsion spring 14 can be adopted to realize the movable connection of the driven plate 12 and the bridge girder 100, the torsion spring 14 is arranged on the inner side of the side edge of the bridge girder 100 in a deformation mode, one end of the torsion spring is fixed on the inner side of the bridge girder 100, the other end of the torsion spring is fixed on the inner side surface of the driven plate 12, the driven plate 12 is pressed and tightly attached to the surface of the driving plate 11 under the stress generated by the torsion spring 14 when the torsion spring is restored to the original state.
Preferably, as shown in fig. 3, the driving plate 11 is a closed hollow structure to reduce the dead weight and facilitate timely rotation.
Further, as shown in fig. 1, fig. 2, fig. 4 and fig. 5, the wind power generation system further includes a plurality of transverse flow guiding units 5, wherein the transverse flow guiding units 5 are arranged at two sides of the bridge girder 100 at intervals along the longitudinal direction of the bridge, and are used for offsetting horizontal acting force caused by wind load; the transverse flow guide unit 5 can be arranged above the tuyere unit 1, so that the installation, the replacement and the maintenance are convenient, and can also be arranged at the bottom of the bridge girder 100, so that the influence on the traffic visual field of the bridge deck is avoided, and the appearance is more attractive; the transverse flow guide unit 5 comprises a second driving mechanism 51 and a first flow guide plate 52, the first flow guide plate 52 is connected with the second driving mechanism 51, and is driven by the second driving mechanism 51 to rotate by taking the vertical direction of the bridge as an axis; in this embodiment, the second driving mechanism 51 may be a combination of a power source (e.g., the second motor 511) and a rotating shaft (e.g., the second rotating shaft 512) connected by a transmission such as a gear or a belt, the rotating shaft of the second driving mechanism 51 is vertically arranged along the bridge, i.e., the axis of the rotating shaft is parallel to the vertical direction of the bridge, one side of the first air deflector 52 is fixedly connected to the second rotating shaft 512, and is driven by the second motor 511 to rotate around the vertical direction of the bridge; the transverse diversion unit 5 is connected with the logic control unit, and the logic control unit controls the rotation angle of the transverse diversion unit 5 according to the wind speed detected by the wind power detection unit 2. In addition, the second rotating shaft 512 can be disposed in the middle of the first baffle 52, so that the two sides of the second rotating shaft 512 are uniformly stressed.
Specifically, it can be understood that, after the logical control unit performs parameter identification on the wind direction data and the wind speed data transmitted by the wind power detection unit 2, a corresponding control signal is obtained and output to the transverse diversion unit 5 through an algorithm, so that the corresponding transverse diversion unit 5 can perform real-time feedback motion. The control of the horizontal diversion units 5 by the logic control unit can be individual control of each horizontal diversion unit 5, or sectional control of a plurality of continuous horizontal diversion units 5 in sections, so as to perform reasonable angle adjustment according to different wind speeds at different sections, and also perform overall control of all the horizontal diversion units 5.
Because some suspension bridges have large span, in order to ensure structural strength, the bridge girder 100 of the suspension bridge is usually in a micro arch shape, and the tuyere unit 1 is also in a micro arch shape at the side of the bridge girder 100. Therefore, when carrying out tuyere unit 1's angular adjustment, the vertical effort and the horizontal effort that the tuyere unit 1 department that non-level set up can receive the wind load and bring, when there is the difference in the wind speed of the vertical both sides of bridge, will bring vertical effort for the bridge, will make bridge pylon 200 produce longitudinal displacement after transshipping, influence structural safety.
For example, as shown in fig. 1, 2 and 4, when the lateral diversion unit 5 is not activated, the plate surface of the first diversion plate 52 is parallel to the lateral direction of the bridge, so as to avoid influencing the wind to pass through the lower side of the bridge. When the wind speed at the upper part of the bridge is the same as the wind speed at the lower part of the bridge and the wind speeds at the left side and the right side of the lower part of the bridge are different, if the wind speed at the left side of the lower part of the bridge is greater than the wind speed at the right side of the lower part of the bridge, the bridge can bear a leftward force in the longitudinal direction of the bridge, and at the moment, the first guide plate 52 is controlled to rotate leftward for a certain angle, so that the wind load can impact the left side surface of the first guide plate 52, a rightward force is provided for the bridge in the longitudinal direction of the bridge and is partially offset with the leftward.
Further, as shown in fig. 1, fig. 2 and fig. 4, the transverse diversion unit 5 further includes a third driving mechanism 53, the third driving mechanism 53 is connected to the second driving mechanism 51, the first diversion plate 52 is connected to the third driving mechanism 53, so that the first diversion plate 52 is driven by the third driving mechanism 53 to rotate around the transverse direction of the bridge as the axis, and the first diversion plate 52 and the third driving mechanism 53 are driven by the second driving mechanism 51 to rotate around the vertical direction of the bridge as the axis. In addition, the first guide plate 52 and the third rotating shaft 532 may be symmetrically disposed on both sides of the second rotating shaft 512, so that the force applied on both sides of the second rotating shaft 512 is uniform.
Similarly, because tuyere unit 1 appears for little hunch form in bridge girder 100 side, then can have the clearance when carrying out angular adjustment between the adjacent tuyere unit 1 for actual vertical effort is slightly less than ideal vertical effort, though can be through the angle of adjustment of increase tuyere unit 1 in order to improve vertical effort, nevertheless can improve the horizontal power that receives of bridge, causes certain influence to the structural safety of bridge. Therefore, the third driving mechanism 53 can rotate the first baffle 52 around the transverse direction of the bridge, i.e. the technical effect similar to that of the tuyere unit 1 is achieved, and a certain vertical acting force is provided for the bridge. When the transverse diversion unit 5 is not started, the plate surface of the first diversion plate 52 is parallel to the transverse direction of the bridge and the longitudinal direction of the bridge at the same time, so that the effect of the wind on the first diversion plate 52 when passing through the lower side of the bridge is avoided.
Specifically, in this embodiment, the second driving mechanism 51 may be a combination of a power source (e.g., the second motor 511) and a rotating shaft (e.g., the second rotating shaft 512) that are connected by a gear or a belt, and the second rotating shaft 512 is disposed vertically along the bridge, i.e., its axis is parallel to the vertical direction of the bridge; the third driving mechanism 53 is also a combination of a power source (e.g., the third motor 531) and a rotating shaft (e.g., the third rotating shaft 532) connected by a transmission such as a gear or a belt, the third rotating shaft 532 is disposed along the bridge in the transverse direction, i.e., the axis of the third rotating shaft 532 is parallel to the bridge in the transverse direction, at this time, the third rotating shaft 532 is perpendicular to the second rotating shaft 512, one side of the first deflector 52 is fixedly connected to the third rotating shaft 532, the first deflector 52 rotates about the bridge in the transverse direction under the driving of the third motor 531, and the first deflector 52 and the third rotating shaft 532 rotate about the bridge in the vertical direction under the driving of the second motor 511. When the wind power generator is started, the third driving mechanism 53 is controlled to rotate the first guide plate 52 to be vertical to the longitudinal direction of the bridge, then the second driving mechanism 51 is controlled to rotate the second rotating shaft 512 for angle adjustment, the first guide plate 52 is rotated to a required angle, and horizontal acting force caused by wind load is counteracted; and finally, the third rotating shaft 532 is rotated by controlling the third driving mechanism 53 to adjust the angle, so that the first guide plate 52 is rotated to a required angle, and a certain vertical acting force is provided for the bridge.
Further, as shown in fig. 1, fig. 2 and fig. 5, the transverse diversion unit 5 further includes a fourth driving mechanism 54 and a second diversion plate 55, the fourth driving mechanism 54 is connected with the second driving mechanism 51, and is driven by the second driving mechanism 51 to rotate around the vertical axis of the bridge; the second guide plate 55 is connected to the fourth driving mechanism 54, and is driven by the fourth driving mechanism 54 to rotate around the longitudinal direction of the bridge. The second deflector 55 can supplement a larger vertical force and facilitate the angle control. When the transverse flow guide unit 5 is not started, the plate surface of the first flow guide plate 52 can be transversely parallel to the bridge or transversely parallel to the bridge and longitudinally parallel to the bridge, and the plate surface of the second flow guide plate 55 is transversely parallel to the bridge and longitudinally parallel to the bridge, so that the effect of wind on the first flow guide plate 52 and the second flow guide plate 55 when the wind passes through the lower side of the bridge is avoided.
Specifically, in this embodiment, the fourth driving mechanism 54 is also a combination of a power source (e.g., the fourth motor 541) and a rotating shaft (e.g., the fourth rotating shaft 542) that are connected by a gear or a belt, the fourth rotating shaft 542 is disposed along the longitudinal direction of the bridge, i.e., the axis of the fourth rotating shaft 542 is parallel to the longitudinal direction of the bridge, at this time, the fourth rotating shaft 542 is perpendicular to the second rotating shaft 512 and the third rotating shaft 532, one side of the second air deflector 55 is fixedly connected to the fourth rotating shaft 542, the second air deflector 55 is driven by the fourth motor 541 to rotate around the longitudinal direction of the bridge, and the second air deflector 55 and the fourth rotating shaft 542 are driven by the second motor 511 to rotate around the vertical direction of the bridge. When the wind power generator is started, the first guide plate 52 is rotated through the second driving mechanism 51 to counteract horizontal acting force caused by wind load; the fourth driving mechanism 54 rotates the second deflector 55 to provide a certain vertical acting force for the bridge. Furthermore, the second guide plate 54 and the fourth rotating shaft 542 may also be symmetrically disposed on two sides of the second rotating shaft 512, so that the two sides of the second rotating shaft 512 are uniformly stressed.
It is understood that in other embodiments, the fourth driving mechanism 54 and the second baffle 55 may not be connected to the second driving mechanism 51, and a driving mechanism having the same structure and function as the second driving mechanism 51 is additionally provided to act on the fourth driving mechanism 54 and the second baffle 55 separately, so as to avoid interference between the second baffle 55 and the first baffle 52.
Further, as shown in fig. 1, the system further includes a plurality of second stress detection units 6, where the second stress detection units 6 are distributed on the bridge girder 100 and are used for detecting stress applied to the bridge girder 100, mainly the magnitude of the stress (including tension or pressure) in the longitudinal direction of the bridge; the second stress detection unit 6 is connected with the logic control unit, and the logic control unit controls the rotation angle of the transverse diversion unit 5 according to the stress value detected by the second stress detection unit 6.
Specifically, the second stress may be a stress sensor or the like, the second stress detection unit 6 transmits the detected stress value borne by the bridge girder 100 to the logic control unit, corresponding control parameters are set in the logic control unit corresponding to the specific stress value, when the received stress value reaches a preset value, the logic control unit outputs a corresponding control signal to the transverse diversion unit 5 according to the corresponding control parameter, the rotation direction and the rotation angle of the transverse diversion unit 5 are controlled, so that the wind load impacts the transverse diversion unit 5, a certain horizontal acting force and/or a certain vertical acting force are provided for the bridge, the tension and the strain of each component of the bridge are controlled, the use safety of the bridge is improved, and the service life of the bridge is prolonged.
Preferably, as shown in fig. 1, the distance between every two bridge towers 200 is an installation section, the second stress detection units 6 can be respectively arranged at one quarter, one half and three quarters of the installation section, and the horizontal sectional measurement is performed on the stress applied to the bridge girder 100, so as to obtain an accurate measurement result, and perform overall control or sectional control on the lateral diversion unit 5.
Further, as shown in fig. 1, when the bridge is a suspension bridge, the bridge further includes a plurality of first stress detection units 3, where the first stress detection units 3 are distributed on the bridge hanger rod 400, preferably in the middle of the bridge hanger rod 400, and are used for detecting a tensile force applied to the bridge hanger rod 400; the first stress detection unit 3 is connected with the logic control unit, and the logic control unit controls the rotation angle of the tuyere unit 1 according to the tension detected by the first stress detection unit 3.
The first stress detection unit 3 detects the tension force applied to the bridge suspender 400, and after the tension force is compared with the calculation model of each working condition of the bridge through the logic control unit, the wind power size, the direction and the wind speed are actually measured according to the wind power detection unit 1, and then the rotation angle of the tuyere unit 1 is adjusted through the logic control unit according to the actually measured tension force contrast difference and the actual wind speed, so that the tension force and the strain applied to the bridge suspender 400 are controlled through natural wind, and the use safety and the service life of the bridge are improved.
Specifically, the first stress detection unit 3 can be a stress sensor, a bridge cable stress detection device and the like, the first stress detection unit 3 transmits a detected tension value borne by the bridge suspender 400 to the logic control unit, corresponding control parameters are arranged in the logic control unit corresponding to a specific tension value, when the received tension value reaches a preset value, the logic control unit outputs a corresponding control signal to the tuyere unit 1 according to the corresponding control parameters, the rotation direction and the rotation angle of the tuyere unit 1 are controlled, so that wind load impacts the tuyere unit 1, certain vertical acting force is provided for the bridge, the load borne by the bridge suspender 400 is reduced, and the safety coefficient of the bridge is improved.
It can be understood that the logic control unit can comprehensively judge the stress condition of the bridge according to the wind speed data provided by the wind power detection unit 2 and the tension value provided by the first stress detection unit 3, and when the wind speed is too low and the bridge bearing load cannot be relieved by providing enough vertical acting force through the tuyere unit 1, an alarm unit is connected to send out an alarm signal, so that the bridge deck vehicle is timely separated, and the follow-up vehicle is limited to be on the bridge.
Preferably, as shown in fig. 1, the distance between every two bridge towers 200 is used as a setting section, the first stress detection unit 3 can be respectively arranged at one quarter, one half and three quarters of the setting section, and the horizontal sectional measurement is performed on the pulling force applied to the bridge hanger rod 400, so as to obtain an accurate measurement result, and perform overall control or sectional control on the tuyere unit 1.
It can be understood that, when there is not wind force detecting unit 2, tuyere unit 1, logic control unit and first stress detecting unit 3 still can cooperate each other and carry out work, detect the pulling force value that bridge jib 400 bore through first stress detecting unit 3 and input to logic control unit, carry out the judgement that the bridge bore the situation, then provide vertical effort for the bridge through the turned angle of adjustment tuyere unit 1 and alleviate bridge and bear the load. When the transverse flow guide unit 5 and the second stress detection unit 6 are arranged, the transverse flow guide unit 5 can be matched with the transverse flow guide unit and the second stress detection unit to supplement certain horizontal acting force and/or vertical acting force for the bridge, and the purposes of improving the use safety and prolonging the service life of the bridge are achieved.
Further, as shown in fig. 1, the system further comprises a displacement detection unit 4, wherein the displacement detection unit 4 is arranged at the upper part of the bridge tower 200, preferably at the top of the bridge tower 200, and is used for detecting the bridge longitudinal displacement at the upper part of the bridge tower 200; the displacement detection unit 4 is connected with the logic control unit, and the logic control unit controls the rotation angle of the tuyere unit 1 according to the bridge longitudinal displacement amount of the upper part of the bridge tower 200 detected by the displacement detection unit 4.
Specifically, the displacement detection unit 4 may be a bridge displacement sensor, a laser displacement sensor, or the like, when the bridge load is too large, the bridge tower 200 may generate a bending moment, the upper portion of the bridge tower 200, specifically, the top portion of the bridge tower 200 may be offset toward the middle of the bridge, and the displacement detection unit 4 transmits the detected bridge longitudinal displacement amount of the upper portion of the bridge tower 200 to the logic control unit; the corresponding control parameters are set corresponding to the specific longitudinal bridge displacement in the logic control unit, when the received longitudinal bridge displacement reaches a preset value, the logic control unit outputs corresponding control signals to the air nozzle unit 1 according to the corresponding control parameters, the rotating direction and the rotating angle of the air nozzle unit 1 are controlled, wind load impacts the air nozzle unit 1, certain vertical acting force is provided for the bridge, the load borne by the bridge is reduced, and the safety factor of the bridge is improved.
It can be understood that the logic control unit can comprehensively judge the stress condition of the bridge according to the wind speed data provided by the wind power detection unit 2 and the longitudinal displacement of the bridge provided by the displacement detection unit 4, and when the wind speed is too low and the bridge bearing load cannot be relieved by providing enough vertical acting force through the tuyere unit 1, an alarm unit is connected to send out an alarm signal, so that the bridge deck vehicles are timely separated, and the follow-up vehicles are limited to get on the bridge.
It can also be understood that, when there is no wind power detection unit 2, the tuyere unit 1, the logic control unit and the displacement detection unit 4 can still cooperate with each other to work, the displacement detection unit 4 detects the longitudinal displacement of the bridge at the upper part of the bridge tower 200 and inputs the longitudinal displacement into the logic control unit to judge the bearing condition of the bridge, and then the rotation angle of the tuyere unit 1 is adjusted to provide a vertical acting force for the bridge to relieve the bearing load of the bridge. When the transverse flow guide unit 5 and the second stress detection unit 6 are arranged, the transverse flow guide unit 5 can be matched with the transverse flow guide unit and the second stress detection unit to supplement certain horizontal acting force and/or vertical acting force for the bridge, and the purposes of improving the use safety and prolonging the service life of the bridge are achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bridge stress control system for suppressing vortex vibration is characterized by comprising a logic control unit, a plurality of air nozzle units and a plurality of wind power detection units;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the wind power detection units are distributed at the upper part and the lower part of the bridge and used for detecting the wind direction and the wind speed;
the air nozzle unit and the wind power detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the wind speeds of the upper part and the lower part of the bridge detected by the wind power detection unit.
2. The bridge stress control system for suppressing vortex vibration according to claim 1, further comprising a plurality of first stress detection units, when the bridge is a suspension bridge, the first stress detection units are distributed on the bridge hanger rod and used for detecting the tensile force applied to the bridge hanger rod;
the first stress detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the tension detected by the first stress detection unit.
3. The bridge stress control system for suppressing vortex vibration according to claim 1, further comprising a displacement detection unit provided at an upper portion of the bridge pylon for detecting a bridge longitudinal displacement of the upper portion of the bridge pylon;
the displacement detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the bridge longitudinal displacement at the upper part of the bridge tower detected by the displacement detection unit.
4. A bridge stress control system for restraining vortex vibration is characterized by comprising a logic control unit, a plurality of air nozzle units and a plurality of first stress detection units, wherein the logic control unit is used for controlling the air nozzle units to generate a plurality of first stress;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the first stress detection unit is distributed on the bridge suspender and used for detecting the tensile force applied to the bridge suspender;
the air nozzle unit and the first stress detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the tension detected by the first stress detection unit.
5. A bridge stress control system for suppressing vortex vibration is characterized by comprising a logic control unit, a displacement detection unit and a plurality of tuyere units;
the tuyere units are arranged on two sides of the bridge girder in parallel along the longitudinal direction of the bridge, are connected with the bridge girder, and rotate by taking the longitudinal direction of the bridge as an axis at the connecting end of the tuyere units and the bridge girder;
the displacement detection unit is arranged at the upper part of the bridge tower and is used for detecting the bridge longitudinal displacement at the upper part of the bridge tower;
the air nozzle unit and the displacement detection unit are respectively connected with the logic control unit, and the logic control unit controls the rotation angle of the air nozzle unit according to the bridge longitudinal displacement amount of the upper part of the bridge tower detected by the displacement detection unit.
6. The bridge stress control system for suppressing vortex vibration according to any one of claims 1 to 5, wherein the tuyere unit comprises a driving plate, a driven plate and a first driving mechanism, the driving plate is connected with the first driving mechanism and driven by the first driving mechanism to rotate around the longitudinal direction of the bridge;
the driven plates are arranged on the upper side and the lower side of the driving plate, one end of each driven plate is movably connected with the main beam of the bridge, and the other end cover of each driven plate is arranged on the driving plate and can slide along the driving plate.
7. The bridge stress control system for suppressing vortex vibration according to any one of claims 1 to 5, further comprising a plurality of transverse flow guiding units, wherein the transverse flow guiding units are arranged on two sides of the bridge girder at intervals along the longitudinal direction of the bridge and used for offsetting horizontal acting force caused by wind load;
the transverse flow guide unit comprises a second driving mechanism and a first flow guide plate, the first flow guide plate is connected with the second driving mechanism, and the transverse flow guide unit is driven by the second driving mechanism to rotate by taking the vertical direction of the bridge as an axis;
the horizontal diversion unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the horizontal diversion unit according to the wind speed detected by the wind power detection unit.
8. The bridge stress control system for suppressing vortex vibration according to claim 7, wherein the transverse flow guiding unit further comprises a third driving mechanism, the third driving mechanism is connected with the second driving mechanism, and is driven by the second driving mechanism to rotate around the vertical direction of the bridge as an axis; the first guide plate is connected with the third driving mechanism and driven by the third driving mechanism to rotate by taking the bridge transversely as an axis.
9. The bridge stress control system for suppressing vortex vibration according to claim 8, wherein the transverse flow guiding unit further comprises a fourth driving mechanism and a second flow guiding plate, the fourth driving mechanism is connected with the second driving mechanism, and is driven by the second driving mechanism to rotate around the vertical direction of the bridge as an axis; the second guide plate is connected with the fourth driving mechanism and driven by the fourth driving mechanism to rotate by taking the longitudinal direction of the bridge as an axis.
10. The bridge stress control system for suppressing vortex vibration according to claim 7, further comprising a plurality of second stress detection units, wherein the second stress detection units are distributed on the bridge girder and used for detecting the stress applied to the bridge girder;
the second stress detection unit is connected with the logic control unit, and the logic control unit controls the rotation angle of the transverse diversion unit according to the stress detected by the second stress detection unit.
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| CN202011026654.3A CN112048985A (en) | 2020-09-25 | 2020-09-25 | Bridge stress control system for suppressing vortex vibration |
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| CN113089460A (en) * | 2021-05-08 | 2021-07-09 | 长安大学 | Wind-guiding vibration-suppressing system for large-span bridge |
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| CN113220046A (en) * | 2021-04-21 | 2021-08-06 | 湖南久钰电子有限公司 | Distributed bridge vortex vibration suppression method and system based on perception data fusion |
| CN113220046B (en) * | 2021-04-21 | 2022-03-15 | 湖南久钰电子有限公司 | Distributed bridge vortex vibration suppression method and system based on perception data fusion |
| CN113186799A (en) * | 2021-05-06 | 2021-07-30 | 同济大学 | Active control wing plate device for improving wind vibration performance of large-span suspension bridge and suspension bridge |
| CN113089460A (en) * | 2021-05-08 | 2021-07-09 | 长安大学 | Wind-guiding vibration-suppressing system for large-span bridge |
| CN113089460B (en) * | 2021-05-08 | 2022-05-27 | 长安大学 | Wind-guiding vibration-suppressing system for large-span bridge |
| CN114856286A (en) * | 2022-06-16 | 2022-08-05 | 国网江苏省电力有限公司建设分公司 | Automatic control device for vortex-induced resonance of steel tube tower rod piece |
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| CN114910031A (en) * | 2022-06-27 | 2022-08-16 | 重庆交通大学 | Suspension bridge health monitoring method and system, computer equipment and storage medium |
| CN114910031B (en) * | 2022-06-27 | 2023-07-04 | 重庆交通大学 | Suspension bridge health monitoring method, system, computer equipment and storage medium |
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