A railing incorporating vibration damping and wind power generation and a method of using the same

Abstract

The application discloses a railing integrated with vibration suppression and wind power generation, comprising two rows of upright columns, the two rows of upright columns are respectively installed on the two sides of the transverse bridge of a box girder, each row of upright columns comprises a plurality of upright columns which are arranged at intervals along the bridge direction of the box girder; two rows of horizontal rail mechanisms, the two rows of horizontal rail mechanisms are respectively arranged on the two rows of upright columns, each row of horizontal rail mechanisms comprises a plurality of horizontal rails which are arranged at intervals along the bridge direction of the box girder, each horizontal rail is located between two adjacent upright columns, and the plurality of horizontal rails form a wave shape; a flow wind collecting device for collecting the wind speed and direction of the flow wind; and a power generation device arranged in the box girder and connected with the upright columns. The application further discloses a use method of the railing. The wavelength and wave speed of the railing are adjusted to change the wave shape of the railing into different wave shapes, so that different types of vortex vibrations of different orders are suppressed; the movement of the wave-shaped railing can capture wind energy, the wind energy is converted into electric energy and stored, and the negative influence of wind on the bridge is converted into positive influence.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge railings, and in particular to a railing integrated with vibration suppression and wind power generation and a use method thereof. BACKGROUND

[0002] The effect of wind on a bridge is divided into static force and dynamic force. The static force is considered as the aerodynamic static three-force acting on the bridge and the static wind instability problem that may be caused thereby; the dynamic force is divided into flutter, galloping, vortex vibration and buffeting. The vortex vibration is a self-limiting wind-induced vibration phenomenon with forced and self-excited double characteristics. It is caused by the vortex that is regularly shed at a certain fixed time interval when the airflow passes through the surface of the structure. The main feature of vortex vibration is that it has a clear wind speed locking interval, and at a certain wind speed, it eventually develops into a relatively stable equal-amplitude vibration. Although vortex vibration does not cause destructive effects on the bridge, large-amplitude vibration can seriously affect the comfort of driving, so the vortex vibration phenomenon needs to be suppressed or at least the vortex vibration amplitude needs to be controlled to a certain acceptable range in engineering.

[0003] Vortex-induced vibration is a wind-induced vibration that easily occurs in a long-span bridge at a low wind speed. The vibration has self-excited nature and forms a certain feedback effect on vortex shedding, so that the amplitude is limited. The Tacoma Narrows Bridge in the United States appeared vertical bending vortex vibration at a low wind speed before torsional flutter instability; the Second Seven Bridge in the United Kingdom and the Lion Gate Bridge in Canada all appeared large-amplitude vortex vibration; the Humen Bridge and the Xihoumen Bridge also appeared sudden vortex vibration. Today, when the wind stability performance of a long-span bridge is ensured, the vortex-induced vibration problem related to applicability and durability is increasingly prominent, and how to effectively reduce or suppress vibration becomes an important research topic.

[0004] At present, the commonly used measures to suppress vortex vibration include mechanical control measures and aerodynamic control measures. The mechanical control measures mostly use the tuned mass damper (TMD) method to suppress vortex vibration, and the main principle is to adjust the mass block stiffness and damping system to transfer the energy of structural vibration to the TMD, so as to achieve the purpose of weakening the structural vibration. However, the TMD can only control the response of a certain order of vibration mode, which will seriously limit the use of TMD in the vortex vibration control of a long-span suspension bridge; in addition, the TMD itself has a heavy mass, which will undoubtedly greatly increase the vertical load of the bridge, and further change the resonance characteristics of the structure.

[0005] The aerodynamic control measure is to adjust and optimize the original cross section shape of the bridge and the auxiliary facilities, that is, to adopt a reasonable main beam cross section shape and add additional aerodynamic measures. At present, the additional aerodynamic measures can be divided into active and passive. Among them, the active additional aerodynamic measure is often mentioned in the conceptual design and has a broad prospect in experimental research, but it is rarely applied in reality. The reason is that it needs additional power supply in practical application, and the cost is high, the form is complex, and the reliability needs to be further tested. The most common in practical application is the passive additional aerodynamic control measure. These measures are fixed at a specific position of the bridge, and although the scope of application of these measures for vortex suppression is limited, the reliability is much higher than that of the active type. The following briefly introduces several common passive aerodynamic suppression measures. The first kind: the flow suppression plate is mainly used to change the flow field distribution on the upper surface of the cross section to reduce the vortex amplitude. However, the flow suppression plate must be installed on the handrail, and there is a certain angle between the flow suppression plate and the handrail, which greatly affects the service life of the traditional handrail, and the flow suppression plate cannot suppress vortex vibration of different orders, and may excite vertical bending vortex vibration under zero angle of attack. The second kind: the maintenance track installed at the bottom of the beam or the inclined web plate can achieve the effect of suppressing vortex vibration. The effect of vortex suppression is better when the maintenance track is used in cooperation with the flow guide plate. However, the inward movement of the maintenance track may be harmful to the torsional vortex vibration, and for relatively blunt main beam cross sections, adding a flow guide plate to the maintenance track has little effect on vortex control. The third kind: the flow divider. The presence of the flow divider changes the flow and separation of the airflow on the surface of the bridge. Although the flow divider can suppress vortex vibration to a certain extent, the flow divider mainly deals with vertical bending vortex vibration, and the effect of the flow divider on torsional vortex vibration control is limited, and even it may be harmful.

[0006] In general, as the span of the bridge increases, the existing active aerodynamic measures are no longer suitable for use in long-span bridges due to cost and power supply limitations. Most passive aerodynamic measures cannot accommodate multiple bridge cross section types or adverse wind vibration effects, and cannot accommodate multiple adverse wind field environment problems. Some measures may even reduce other wind vibration performance while improving a certain wind vibration performance, that is, they cannot simultaneously accommodate vertical bending vortex vibration and torsional vortex vibration. The use of traditional passive aerodynamic measures alone cannot meet the requirements of long-span bridges for wind vibration performance. The improvement effect provided by passive aerodynamic measures is approaching the limit, and the control ability is only for specific incoming flow conditions. At the same time, traditional passive aerodynamic measures regard the effect of wind on the bridge as a negative impact, and cannot effectively utilize wind energy. SUMMARY

[0007] In view of the deficiencies of the prior art, the purpose of the present application is to provide an intelligent handrail that integrates vortex suppression and wind power generation.

[0008] In order to achieve the above purpose, the technical scheme provided by an embodiment of the present application is as follows:

[0009] An intelligent handrail that integrates vortex suppression and wind power generation, comprising:

[0010] two rows of columns, the two rows of columns are respectively arranged on the two sides of the transverse direction of the box girder, each row of columns comprises a plurality of columns arranged along the longitudinal direction of the box girder at intervals;

[0011] two rows of rail mechanisms, the two rows of rail mechanisms are respectively arranged on the two rows of columns, each row of rail mechanisms comprises a plurality of rails arranged along the longitudinal direction of the box girder at intervals, each rail is located between two adjacent columns, and the plurality of rails form a wave shape;

[0012] a flow wind collecting device for collecting the wind speed and direction of the flow wind;

[0013] a power generation device arranged in the box girder, the power generation device being connected with the columns.

[0014] As a further improvement of the present application, the rail is in a wave shape, a half wave shape or a broken line shape.

[0015] As a further improvement of the present application, each rail comprises a plurality of rail bodies arranged at intervals in the vertical direction.

[0016] As a further improvement of the present application, the rail is in a solid plate shape.

[0017] As a further improvement of the present application, a plurality of guide grooves are arranged on the two sides of the transverse direction of the box girder, each guide groove comprises a plurality of guide grooves arranged along the longitudinal direction of the box girder at intervals, the guide grooves extend along the transverse direction of the box girder, and the columns are located in the guide grooves and can move back and forth along the guide grooves.

[0018] As a further improvement of the present application, a control system is further included, the flow wind collecting device and the power generation device are connected with the control system, and the control system is further used for controlling the movement of the rail.

[0019] As a further improvement of the present application, the power generation device comprises a crank connecting rod mechanism, a gearbox and a generator, the crank connecting rod mechanism is connected with the column and the gearbox respectively, and the gearbox is connected with the generator.

[0020] As a further improvement of the present application, an output power grid is further included, and the output power grid is connected with the control system.

[0021] A use method of a rail integrating vibration suppression and wind power generation, the rail is used, and the use method comprises the following steps:

[0022] (1) collecting flow data of the flow wind, the flow data at least comprising a flow wind speed and a flow wind direction;

[0023] (2) When the incoming wind direction has a component along the bridge direction, the incoming wind pushes the column to move, so that the power generation device generates electrical energy, and / or, when the incoming wind direction has a component along the bridge direction, the motion parameters of the crossbar are changed to suppress vortex vibration.

[0024] As a further improvement of the present invention, the motion parameters include the vibration angular frequency.

[0025] The beneficial effects of this invention are:

[0026] (1) Based on the geographical location of the bridge, different wave-shaped railings are made by adjusting parameters such as the wavelength and wave velocity of the railings to suppress different types of vortex-induced vibrations such as vertical bending vortex-induced vibration and torsional vortex-induced vibration, depending on the different bridge cross-section types, wind environments and aerodynamic characteristics.

[0027] (2) The movement of the wave railing can capture wind energy and convert it into electrical energy for storage. Part of the energy is used to change the wavelength and wave speed of the railing when vortex-induced vibration occurs, so that the railing vibrates periodically and suppresses vortex-induced vibration to avoid sudden situations caused by vortex-induced vibration, thus achieving a good self-powered effect. The other part is used to output the power grid and use the excess electrical energy for the normal operation of the bridge, providing power for the bridge's lighting, bridge monitoring sensors and other electrical facilities and ancillary facilities, thus turning the negative impact of wind on the bridge into a positive impact. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the preferred embodiment of the present invention, showing a wavy horizontal bar.

[0030] Figure 2 The image shows a before-and-after comparison of the movement of the column along with the horizontal bar, representing a preferred embodiment of the present invention.

[0031] Figure 3 for Figure 2 Top view;

[0032] Figure 4 This is a front, middle, and rear comparison diagram of the column moving together with the horizontal bar in a preferred embodiment of the present invention;

[0033] Figure 5 for Figure 4 Top view;

[0034] Figure 6This is a top view comparing the railing before, during, and after movement according to a preferred embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the overall structure of the horizontal bar in a preferred embodiment of the present invention, which has a semi-wave shape.

[0036] Figure 8 This is a schematic diagram of the overall structure of the horizontal bar in the preferred embodiment of the present invention, which is in the shape of a broken line.

[0037] Figure 9 This is a schematic diagram of the overall structure of the preferred embodiment of the present invention, showing that the horizontal bar is in the shape of a solid plate.

[0038] Figure 10 This is a block diagram illustrating the principle of generating electrical energy according to a preferred embodiment of the present invention.

[0039] In the diagram: 1. Box girder, 11. Guide groove, 2. Column, 3. Horizontal rail, 31. Horizontal rail body, 4. Incoming air collection device, 5. Power generation device, 51. Crank connecting rod mechanism, 52. Gearbox, 521. Gear mechanism, 53. Generator, 6. Control system, 7. Output power grid. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0041] Please see Figures 1-6 This application discloses a railing that integrates vibration damping and wind power generation, comprising: two rows of columns, which are respectively installed on both sides of the transverse direction of the box girder 1, each row of columns including multiple columns 2 spaced apart along the longitudinal direction of the box girder 1; two rows of horizontal railing mechanisms, which are respectively installed on the two rows of columns 2, each row of horizontal railing mechanisms including multiple horizontal rails 3 spaced apart along the longitudinal direction of the box girder 1, each horizontal rail 3 being located between two adjacent columns 2, and the multiple horizontal rails 3 forming a waveform; an incoming wind collection device 4, used to collect the wind speed and direction of the incoming wind; and a power generation device 5, which is installed inside the box girder 1 and connected to the columns 2.

[0042] Post 2 is used to support the horizontal bar 3 and connect adjacent horizontal bars 3. Post 2 and horizontal bar 3 are along Figure 6When the arrow direction is periodically vibrated, a traveling wave is formed, so that the whole railing moves along the bridge in a "wave" manner. From the initial time, the railing moves along the bridge by a certain distance at t1, and moves along the bridge by another certain distance at t2. The incoming wind collecting device 4 collects the wind speed and direction of the incoming wind. If the component of the incoming wind direction is along the cross section direction of the box girder 1, the vortex vibration response is considered. By changing the parameters of the periodic vibration of each cross bar 3, the wavelength and wave speed of the railing are changed, and three-dimensional periodic disturbance is provided to the flow field to offset the vortex generated when the wind blows through the bridge and to suppress vortex vibration of different orders. If the component of the incoming wind direction is along the bridge, the railing is equivalent to a wave plate. According to the wind energy utilization principle of the wave plate, energy can be absorbed from the incoming wind. The incoming wind drives the column to move, which can provide the mechanical energy required for the power generation device 5 in the box girder 1 to generate electricity, so as to convert wind energy into electrical energy.

[0043] Please refer to Figure 1 , the cross bar 3 is in a wave shape, but is not limited to a wave shape, and can also be in a half-wave shape or a polyline shape, such as Figure 7 、 Figure 8 indicate, or other shapes that can achieve the effect of suppressing vortex vibration.

[0044] Specifically, each cross bar 3 includes a plurality of cross bar bodies 31 arranged at intervals in the vertical direction.

[0045] In another embodiment, please refer to Figure 9 , the cross bar 3 is in a solid plate shape.

[0046] In order to facilitate the periodic movement of the column 2 along the transverse direction of the bridge, a plurality of guide grooves are preferably arranged on both sides of the box girder 1 in the transverse direction of the bridge. Each guide groove includes a plurality of guide grooves 11 arranged at intervals along the bridge direction of the box girder 1. The guide groove 11 extends along the transverse direction of the box girder 1. The column 2 is located in the guide groove 11 and can move back and forth in the guide groove 11.

[0047] Please refer to Figure 10 , and further includes a control system 6. The incoming wind collecting device 4 and the power generation device 5 are connected to the control system 6, and the control system 6 is further used to control the movement of the railing. The movement of the railing is intelligently and accurately controlled by the control system 6, which facilitates better suppression of different types of vortex vibration of different orders. The incoming wind collecting device 4 can be an incoming wind speed and direction sensor.

[0048] Specifically, as Figure 10As shown, the power generation device 5 includes a crank connecting rod mechanism 51, a gearbox 52 and a generator 53, the crank connecting rod mechanism 51 is connected with the column 2 and the gearbox 52 respectively, and the gearbox 52 is connected with the generator 53. The column 2 moves back and forth to drive the crankshaft of the crank connecting rod mechanism 51 to rotate, the crankshaft drives the gear mechanism 521 in the gearbox 52 to rotate at a constant speed, the gear mechanism 521 improves and stabilizes the rotating speed of the rotor of the generator 53, thereby improving the power generation efficiency, the stator of the generator 53 such as a fixed coil is used to provide a magnetic field, and the rotor of the generator 53 rotates to cut the magnetic induction lines under the driving of the gear mechanism 521, thereby generating electric energy.

[0049] The output power grid 7 is also included, which is connected with the control system 6.

[0050] The generated electric energy is mainly used in three aspects: first, for the incoming flow wind collection device 4 and the control system 6; second, the excess electric energy can be used to power the street lamps or other auxiliary facilities on the bridge through the output power grid 7, so as to achieve the purpose of self-power supply; third, the remaining electric energy is stored, when vortex vibration does not occur, the street lamps or other auxiliary facilities can still be powered, to ensure the normal power demand of the bridge.

[0051] The advance of the traveling wave is essentially the effect of the periodic vibration of each unit of the railing in the direction perpendicular to the bridge. For the wave-shaped railing, the advance of the traveling wave satisfies the formula: u=sin(ωt+βx). The bridge deck is regarded as a plane, and the bridge direction is taken as the x-axis and the transverse direction is taken as the y-axis. In the formula of the traveling wave, u is the amplitude, ω is the vibration angular frequency, t is the vibration time, β is a constant, and x is the horizontal coordinate. ω=2π / T, T is the unit vibration period. In the process of the traveling wave propagation, the distance between the adjacent two horizontal bars 3 where the amplitude u reaches the maximum value is the wavelength λ, and the wave speed v=λ×ω / 2π. By changing the vibration angular frequency, the wavelength and the wave speed of the traveling wave can be changed, and three-dimensional periodic disturbance is provided to the flow field, so as to offset the vortex generated when the wind blows through the bridge deck and thereby suppress different types of vortex vibration of different orders.

[0052] The wave-shaped railing of the streamlined box girder section is taken as an example in this embodiment, as shown in Figures 1-6The mechanism of vortex vibration is that the flow separates at the rail and forms vortexes which drift along the section and are shed at the trailing edge. When the shedding frequency of the vortexes is consistent with the inherent frequency of the structure, the amplitude of the bridge reaches the maximum, i.e. vortex vibration occurs. The inflow wind collecting device 4 collects the inflow data of the inflow wind, and the inflow data at least includes the inflow wind speed and the inflow wind direction. The inflow wind direction of the inflow wind is decomposed into the wind direction components in the bridge longitudinal direction and the bridge transverse direction. If the inflow wind direction of the inflow wind has the wind direction component in the bridge longitudinal direction, the inflow wind pushes the column 2 and the transverse rail 3 to move, and the column 2 drives the power generation device 5 to act, thereby generating electric energy. At the same time, if the inflow wind direction of the inflow wind has the wind direction component in the bridge transverse direction, the angular frequency of the vibration of the transverse rail 3 is changed in real time, i.e. the wavelength, the wave speed and other parameters of the traveling wave can be changed, the movement of the rail changes the flow separation of the inflow wind at the rail, destroys the formation of the vortexes or changes the drift route of the vortexes, so that the vortexes cannot be shed at a stable frequency, thereby achieving the purpose of inhibiting vortex vibration. Thus, the rail can achieve the purposes of wind energy capture and vortex vibration inhibition during operation.

[0053] The application further provides a use method of the rail integrating vortex vibration inhibition and wind power generation, and the rail is used, and the use method comprises the following steps:

[0054] (1) collecting the inflow data of the inflow wind, and the inflow data at least includes the inflow wind speed and the inflow wind direction.

[0055] Specifically, the inflow wind speed and the inflow wind direction of the inflow wind are collected by the inflow wind collecting device 4, and the inflow wind direction of the inflow wind is decomposed into the wind direction components in the bridge longitudinal direction and the bridge transverse direction.

[0056] (2) when the inflow wind direction has the wind direction component in the bridge longitudinal direction, the inflow wind pushes the column 2 to move, so that the power generation device 5 generates electric energy, and / or when the inflow wind direction has the wind direction component in the bridge transverse direction, the movement parameters of the transverse rail 3 are changed to inhibit vortex vibration.

[0057] Specifically, when the inflow wind direction has the wind direction component in the bridge longitudinal direction, the inflow wind pushes the column 2 to move, and the column 2 vibrates in the bridge transverse direction, thereby driving the crankshaft of the crank connecting rod mechanism 51 to rotate, the crankshaft drives the gear mechanism 521 to rotate at a constant speed, the stator of the generator 53 provides a magnetic field, the rotor of the generator 53 rotates to cut the magnetic induction lines under the drive of the gear mechanism 521, thereby generating electric energy. At the same time, when the inflow wind direction has the wind direction component in the bridge transverse direction, the angular frequency of the vibration of the transverse rail 3 is changed in real time according to the vortex vibration response, i.e. the wavelength, the wave speed and other parameters of the traveling wave can be changed, and vortex vibration is inhibited.

[0058] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0059] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A railing incorporating vibration damping and wind energy generation, characterised in that, The utility model relates to a kind of fence, including: Two rows of columns, two rows of columns are installed in the lateral direction of box girder respectively, each row of columns includes a plurality of columns arranged along the longitudinal direction of the box girder, the lateral direction of the box girder is provided with a plurality of guide slots, each guide slot includes a plurality of guide slots arranged along the longitudinal direction of the box girder, the guide slot extends along the lateral direction of the box girder, the column is located in the guide slot and can reciprocate along the guide slot; Two rows of rail mechanisms, two rows of rail mechanisms are arranged on two rows of columns respectively, each row of rail mechanisms includes a plurality of rails arranged along the longitudinal direction of the box girder, each rail is located between two adjacent columns, and a plurality of rails form a wave shape; A wind speed and direction acquisition device is used to acquire the wind speed and direction of the incoming wind. A power generation device is arranged in the box girder, the power generation device is connected to the column, and the power generation device includes a crank and connecting rod mechanism, a gearbox and a generator, the crank and connecting rod mechanism is connected to the column and the gearbox respectively, and the gearbox is connected to the generator. The utility model also includes a control system, and the wind speed and direction acquisition device and the power generation device are connected to the control system, and the control system is also used to control the movement of the rail.

2. The fence incorporating a vibration damping and wind energy generation according to claim 1, characterized in that, The rail is in a wave shape, a half-wave shape or a broken line shape.

3. The fence incorporating a vibration damping and wind energy generation according to claim 2, wherein, Each rail includes a plurality of rail bodies arranged along the vertical direction.

4. The fence of claim 2, wherein, The rail is in a solid plate shape.

5. The fence of claim 1, wherein, The utility model also includes an output grid connected to the control system.

6. A method of using a railing that incorporates vibration dampening and wind energy generation, the method comprising: The utility model also includes the following steps using the rail of any one of claims 1-5: (1) acquiring incoming wind data of the incoming wind, the incoming wind data at least including wind speed and wind direction; (2) when there is a longitudinal wind direction component in the incoming wind direction, the column is moved by the incoming wind, so that the power generation device generates electric energy, and / or when there is a lateral wind direction component in the incoming wind direction, the movement parameters of the rail are changed to suppress vortex vibration.

7. The method of claim 6, wherein the wind energy generating railing is used as a fence. The movement parameters include the angular frequency of vibration.

Images