Adjustable vortex-induced vibration suppression device for split double-box girder

Abstract

The invention relates to the technical field of bridge engineering, and discloses an adjustable vortex-induced vibration suppression device for a split double-box girder, the split double-box girder comprises two box girders, a plurality of transverse connecting beams are arranged between the two box girders, and an open groove is formed between every two adjacent transverse connecting beams; guide plates extending towards the centers of the grooves in the transverse bridge direction are arranged on the box girders on the two sides of the grooves, and the width of each guide plate in the transverse bridge direction can be adjusted. The guide plates extending in the transverse bridge direction are arranged on the box girders located on the two sides of the open grooves at the same time, and vortex-induced vibration possibly generated by the split double box girders can be effectively restrained. Meanwhile, the width, in the transverse bridge direction, of the flow guide plate is set to be adjustable, the width, in the transverse bridge direction, of the flow guide plate can be adjusted according to the actual wind speed in the low-wind-speed environment so that the split double-box girder can have the optimal vortex-induced vibration performance, and the flutter performance of the split double-box girder can be improved in the high-wind-speed environment.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to an adjustable vortex-induced vibration suppression device for a split double box girder. Background Art

[0002] The contents in this section merely provide background information related to the present invention and may not constitute prior art.

[0003] Split double box girders with slots are widely used in long-span bridges because of their good flutter performance.

[0004] However, due to the presence of the slots, the vortex-induced vibration performance of the split double box girder will be deteriorated. The so-called vortex-induced vibration is simply a forced vibration with self-excited properties that occurs in the low wind speed range. Among them, when the amplitude of the vortex-induced vibration generated by the split double box girder is large, it will affect driving safety and passenger comfort, and the long-term vibration of the split double box girder may also cause fatigue damage to the structure. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an adjustable vortex-induced vibration suppression device for a split double box girder, in the hope of effectively suppressing the vortex-induced vibration that may be generated by the split double box girder, thereby effectively improving the vortex-induced vibration performance of the split double box girder.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention discloses an adjustable vortex-induced vibration suppression device for a split double box girder, wherein the split double box girder comprises two box girders symmetrically arranged in the transverse direction of the bridge, a plurality of transverse connecting beams spaced apart in the direction of the bridge are arranged between the two box girders, and a slot is formed between two adjacent transverse connecting beams;

[0008] The adjustable vortex-induced vibration suppression device includes a guide plate;

[0009] The box beams located on both sides of each slot are provided with guide plates extending along the transverse direction toward the center of the slot, and the length of each guide plate along the longitudinal direction is equal to the length of the slot along the longitudinal direction;

[0010] Wherein, the width of each guide plate along the transverse direction of the bridge can be adjusted.

[0011] Furthermore, the width of the guide plate along the transverse bridge direction is equal to 0.00% to 50.00% of the width of the slot along the transverse bridge direction.

[0012] Further, the guide plate is movably connected to the corresponding box beam so that the guide plate can reciprocate along the transverse bridge direction;

[0013] The vortex-induced vibration suppression device also includes an adjustment drive mechanism corresponding to each of the guide plates, and the adjustment drive mechanism is configured to drive the corresponding guide plate to reciprocate along the transverse bridge direction.

[0014] Furthermore, the adjustment drive mechanism includes a rack, a gear and a drive motor;

[0015] The rack is arranged on the guide plate and extends in the transverse direction. The gear transmission is connected to the drive motor so that the drive motor drives the gear to rotate, and the gear is meshed with the rack.

[0016] Furthermore, the adjustment drive mechanism also includes a reducer and a rotating shaft, the reducer is transmission-connected to the output end of the drive motor, the rotating shaft is transmission-connected to the reducer, and the gear is coaxially arranged on the rotating shaft.

[0017] Furthermore, a receiving cavity is provided inside the box beam corresponding to the guide plate, and the receiving cavity has an inlet and an outlet;

[0018] The driving motor and the gear are both arranged in the accommodating cavity, and the guide plate extends from the inlet and outlet to the accommodating cavity on one side close to the box beam.

[0019] Furthermore, the adjustment drive mechanism further includes a sensing component and a triggering component, the sensing component has a triggering state and a non-triggering state, and the sensing component is arranged on the movement path of the corresponding guide plate;

[0020] The trigger component is configured to move synchronously with the corresponding guide plate, and the trigger component is also configured to repeatedly trigger the sensing component at predetermined time intervals when the guide plate moves along the transverse bridge direction, so that the sensing component can alternately switch between the triggered state and the non-triggered state in sequence.

[0021] Further, the sensing component is a photoelectric sensor;

[0022] The trigger component includes multiple trigger parts suitable for triggering the sensing component, and the multiple trigger parts are arranged in sequence along the transverse bridge direction. The distance between two adjacent trigger parts in the multiple trigger parts is equal, and the distance between two adjacent trigger parts is equal to the width of a single trigger part along the transverse bridge direction.

[0023] Furthermore, the adjustable vortex-induced vibration suppression device also includes a control box provided with a controller and corresponding one-to-one with the adjustment drive mechanism, and the drive motor and the induction component are both communicatively connected to the corresponding controller.

[0024] Furthermore, the guide plate is slidably connected to the corresponding box beam so that the guide plate can reciprocate along the transverse bridge direction in a sliding manner.

[0025] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0026] 1. The vortex-induced vibration suppression device disclosed in the present invention can use the guide plates to shield the part of the slot close to the box girder by simultaneously arranging guide plates extending along the transverse direction on the box girders located on both sides of each slot. In this way, on the basis of ensuring that the wind can penetrate the slot so that the split double box girder has better flutter performance, the guide plates can be used to disrupt the vortex at the slot of the split double box girder and change the air flow characteristics at the slot, thereby effectively suppressing the vortex-induced vibration that may be generated by the split double box girder, thereby effectively improving the vortex-induced vibration performance of the split double box girder.

[0027] 2. The present invention sets the width of the guide plate along the transverse direction to be adjustable, which can not only adjust the width of the guide plate along the transverse direction according to the actual wind speed in a low wind speed environment so that the split double box girder has the best vortex-induced vibration performance, but also in a high wind speed environment, it can increase the ventilation area at the slot by reducing the width of the guide plate along the transverse direction as much as possible to improve the flutter performance of the split double box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a split double box girder provided in an embodiment of the present invention;

[0029] Figure 2 A schematic structural diagram of a split double box girder and a vortex-induced vibration suppression device provided by an embodiment of the present invention, which shows a situation where the width of the guide plate along the transverse bridge direction is equal to 0.00% of the width of the slot along the transverse bridge direction;

[0030] Figure 3 A schematic structural diagram of a split double box girder and a vortex-induced vibration suppression device in another state provided by an embodiment of the present invention, which shows a situation where the width of the guide plate along the transverse bridge direction is equal to 50.00% of the width of the slot along the transverse bridge direction;

[0031] Figure 4 for Figure 3 A cross-sectional view of a split double box girder and a vortex-induced vibration suppression device shown in FIG.

[0032] Figure 5 A schematic structural diagram of a single guide plate and its corresponding adjustment drive mechanism provided by an embodiment of the present invention;

[0033] Figure 6 for Figure 4 A magnified view of the structure at center A;

[0034] Figure 7 A schematic diagram of the structure of the sensing component and the triggering component provided by the embodiment of the present invention;

[0035] Figure 8 It is a curve diagram showing the relationship between the amplitude of vertical vortex-induced vibration of a split double box girder without the vortex-induced vibration suppression device disclosed in the present invention and the wind speed under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0036] Fig. 9 It is a curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder without the vortex-induced vibration suppression device disclosed in the present invention under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0037] Fig.10 A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 12.50% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0038] Fig.11 A curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 12.50% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0039] Fig.12 A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 18.75% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0040] Fig.13 A curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and having a guide plate width along the transverse bridge direction equal to 18.75% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0041] Fig.14A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 25.00% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0042] Fig.15 A curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and having a guide plate width along the transverse bridge direction equal to 25.00% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0043] Fig.16 A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 37.50% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0044] Fig.17 A curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and having a guide plate width along the transverse bridge direction equal to 37.50% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0045] Fig.18 A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of a split double box girder provided with the vortex-induced vibration suppression device disclosed in the present invention and the width of the guide plate along the transverse bridge direction being equal to 50.00% of the width of the slot along the transverse bridge direction under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25%;

[0046] Fig.19 The present invention is a curve diagram showing the relationship between the amplitude of torsional vortex-induced vibration and wind speed of a split double box girder equipped with the vortex-induced vibration suppression device disclosed in the present invention and with the width of the guide plate along the transverse bridge direction being equal to 50.00% of the width of the slot along the transverse bridge direction under the conditions of wind attack angles of -3°, 0°, +3°, uniform flow, and a damping ratio of 0.25%.

[0047] Icons: 10- guide plate, 20- adjusting drive mechanism, 21- rack, 22- gear, 23- driving motor, 24- reducer, 25- rotating shaft, 26- slide rail, 27- sensing component, 28- trigger component, 281- trigger part, 30- control box, 100- split double box beam, 101- box beam, 1011- accommodating chamber, 1012- inlet and outlet, 102- transverse connecting beam, 103- slot, 104- anti-collision guardrail. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with specific implementation methods below. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0050] Example 1

[0051] Embodiment 1 of the present invention discloses an adjustable vortex-induced vibration suppression device for a split double box girder 100 (hereinafter referred to as “vortex-induced vibration suppression device” for the sake of convenience), in the hope of effectively suppressing the vortex-induced vibration that may be generated by the split double box girder 100, thereby effectively improving the vortex-induced vibration performance of the split double box girder 100.

[0052] like Figure 1 As shown, it shows the general structure of the exemplary split double box girder 100 disclosed in this embodiment. The structure of the split double box girder 100 is also a possible structure of the split double box girder 100 known in the prior art.

[0053] exist Figure 1 In the split double box girder 100 shown, the split double box girder 100 may include two box girders 101 symmetrically arranged in the transverse direction of the bridge, and a plurality of transverse connecting beams 102 spaced apart in the longitudinal direction of the bridge may be further arranged between the two box girders 101, and a slot 103 is formed between two adjacent transverse connecting beams 102. Figure 1Only a partial structure of the split double box girder 100 is shown. For example, the two box girders 101 of the split double box girder 100 can continue to extend along the longitudinal direction of the bridge, and there can be more transverse connecting beams 102 between the two box girders 101.

[0054] At the same time, anti-collision guardrails 104 extending along the longitudinal direction of the bridge can be provided on both sides of the top surface (ie, the bridge deck) of each box girder 101 opposite to each other along the transverse direction of the bridge.

[0055] On this basis, in order to effectively suppress the vortex-induced vibration that may be generated by such a split double box girder 100 , the vortex-induced vibration suppression device disclosed in this embodiment may include a guide plate 10 .

[0056] Combination Figures 2 to 4 As shown, the box beams 101 located on both sides of each slot 103 are provided with guide plates 10 extending along the transverse direction toward the center of the slot 103. The length of each guide plate 10 along the longitudinal direction may be equal to the length of the slot 103 along the longitudinal direction, that is, the length of each guide plate 10 along the longitudinal direction may be equal to the spacing between two adjacent transverse connecting beams 102.

[0057] At the same time, this embodiment further stipulates that the width of each guide plate 10 along the transverse bridge direction is adjustable.

[0058] It can be understood that the vortex-induced vibration suppression device disclosed in the present embodiment can utilize the guide plates 10 to shield the portion of the slot 103 close to the box girder 101 by simultaneously arranging guide plates 10 extending along the transverse direction on the box girder 101 located on both sides of each slot 103. In this way, on the basis of ensuring that the wind can penetrate the slot 103 so that the split double box girder 100 has better flutter performance, the guide plates 10 can be utilized to disrupt the vortex at the slot 103 of the split double box girder 100 and change the air flow characteristics at the slot 103, thereby effectively suppressing the vortex-induced vibration that may be generated by the split double box girder 100, and further effectively improving the vortex-induced vibration performance of the split double box girder 100.

[0059] At the same time, this embodiment sets the width of the guide plate 10 along the transverse bridge direction to be adjustable, which not only can adjust the width of the guide plate 10 along the transverse bridge direction according to the actual wind speed in a low wind speed environment so that the split double box girder 100 has the best vortex-induced vibration performance, but also in a high wind speed environment, it can increase the ventilation area at the slot 103 by reducing the width of the guide plate 10 along the transverse bridge direction as much as possible, so as to improve the flutter performance of the split double box girder 100.

[0060] In some embodiments of the present invention, the width of each guide plate 10 along the transverse bridge direction may be equal to 0.00% to 50.00% of the width of the slot 103 along the transverse bridge direction. In other words, the width of the guide plate 10 along the transverse bridge direction may be adjusted within a width range of 0.00% to 50.00% of the width of the slot 103 along the transverse bridge direction. The width of the guide plate 10 along the transverse bridge direction being equal to 0.00% of the width of the slot 103 along the transverse bridge direction may be understood as follows: the guide plate 10 is removed from the slot 103. At this time, as shown in FIG. Figure 2 As shown, the slot 103 will have the largest opening, so that in a high wind speed environment, the split double box girder 100 has a better flutter performance; accordingly, when the width of the guide plate 10 along the transverse bridge direction is equal to 50.00% of the width of the slot 103 along the transverse bridge direction, as shown in FIG. Figure 3 As shown, the guide plates 10 located on both sides of the slot 103 will cooperate with each other to completely close the slot 103, so that in a low wind speed environment, the split double box girder 100 has better vortex-induced vibration performance.

[0061] The width of the guide plate 10 along the transverse direction can be adjusted in the following manner but is not limited thereto.

[0062] Combination Figure 4 As shown in the content, this embodiment further defines that each guide plate 10 is movably connected to the corresponding box beam 101, so that each guide plate 10 can reciprocate along the transverse direction.

[0063] Secondly, the vortex-induced vibration suppression device disclosed in this embodiment may also include an adjustment drive mechanism 20 corresponding to each guide plate 10. The adjustment drive mechanism 20 is configured to drive the corresponding guide plate 10 to reciprocate along the transverse bridge direction to adjust the width of the guide plate 10 along the transverse bridge direction.

[0064] The adjusting drive mechanism 20 may be constructed in the following manner but is not limited thereto, so as to simplify the structure of the adjusting drive mechanism 20 as much as possible.

[0065] Combination Figure 5 and Figure 6 As shown, the adjustment drive mechanism 20 may include a rack 21, a gear 22, and a drive motor 23. The rack 21 is disposed on the guide plate 10 and extends in the transverse direction. For example, the rack 21 extending in the transverse direction may be disposed on the bottom surface of the guide plate 10 to optimize the structural design of the guide plate 10 as much as possible.

[0066] The gear 22 is connected to the driving motor 23 so as to drive the gear 22 to rotate. In addition, the gear 22 is meshed with the rack 21 on the guide plate 10 for transmission.

[0067] In this way, when the driving motor 23 drives the gear 22 to rotate, the rack 21 can move along the transverse bridge direction under the transmission action of the gear 22, thereby driving the guide plate 10 to move along the transverse bridge direction through the rack 21 to change the width of the guide plate 10 along the transverse bridge direction.

[0068] It is understandable that the rack 21 provided on a single guide plate 10 can be one or more. Preferably, the rack 21 on a single guide plate 10 can be provided in a plurality, and the plurality of racks 21 can be provided in sequence along the length direction of the guide plate 10 (i.e., along the bridge direction), and the gear 22 is provided in a one-to-one correspondence with the rack 21, so that the force acting on the guide plate 10 to force it to move along the transverse bridge direction is more uniform, thereby improving the reliability of the guide plate 10 when moving along the transverse bridge direction. Figure 5 FIG. 2 shows a situation where two racks 21 are provided on the guide plate 10 .

[0069] There are also multiple transmission connection modes between the drive motor 23 and the gear 22. For example, the gear 22 can be directly coaxially arranged on the output shaft of the drive motor 23 to achieve the transmission connection between the two. Alternatively, Figure 5 As shown, the output end of the driving motor 23 can be connected to the reducer 24, which is connected to a rotating shaft 25 arranged along the longitudinal direction of the bridge, and the gear 22 is coaxially arranged on the rotating shaft 25. In this way, when the driving motor 23 is working, the gear 22 can be driven to rotate through the transmission effect of the reducer 24 and the rotating shaft 25. This method helps to reliably drive multiple gears 22 to rotate synchronously when there are multiple gears 22 using one driving motor 23, and helps to optimize the structural design of the adjustment driving mechanism 20. In addition, the reducer 24 can be a worm gear reducer to output a sufficiently large torque, thereby further improving the reliability of the guide plate 10 when it moves along the transverse direction of the bridge.

[0070] Further, in order to be able to adjust the width of the guide plate 10 along the transverse bridge direction to 0.00% of the width of the slot 103 along the transverse bridge direction (that is, the guide plate 10 is Figure 2 Removed from the slot 103 in the manner shown), combined with Figure 6 As shown in the content, a accommodating cavity 1011 with an inlet and outlet 1012 can be set inside the box beam 101 corresponding to the guide plate 10. At this time, the adjusting drive mechanism 20 corresponding to the guide plate 10, especially the gear 22, drive motor 23, reducer 24 and rotating shaft 25 of the adjusting drive mechanism 20 can be set in the accommodating cavity 1011, and the side of the guide plate 10 close to the box beam 101 extends from the inlet and outlet 1012 to the accommodating cavity 1011.

[0071] In this way, when the drive motor 23 works to make the guide plate 10 move along the transverse bridge direction toward the direction of the corresponding box beam 101, the guide plate 10 can eventually be completely hidden in the accommodating cavity 1011 through the inlet and outlet 1012, so that the width of the guide plate 10 along the transverse bridge direction can be equal to 0.00% of the width of the slot 103 along the transverse bridge direction.

[0072] Furthermore, each guide plate 10 may be slidably connected to the corresponding box beam 101, so that the guide plate 10 can reciprocate along the transverse direction in a sliding manner, thereby further improving the reliability of the guide plate 10 when moving along the transverse direction. Figure 5 and Figure 6 As shown, a slide rail 26 extending in the transverse direction can be provided on the box beam 101 , and the guide plate 10 can be slidably connected to the slide rail 26 to achieve sliding cooperation between the guide plate 10 and the corresponding box beam 101 .

[0073] The slide rail 26 may be a component disposed in the aforementioned accommodation cavity 1011 and extending from the inlet and outlet 1012 to the outside of the accommodation cavity 1011 along the transverse bridge direction, and the slide rail 26 extending to the outside of the accommodation cavity 1011 may be fixed on the corresponding transverse connecting beam 102. At the same time, two slide rails 26 corresponding to a single guide plate 10 may be provided, and the two slide rails 26 are distributed on opposite sides of the guide plate 10 along the longitudinal bridge direction, so that the opposite sides of the guide plate 10 along the longitudinal bridge direction can be slidably connected with one slide rail 26 respectively, so as to further improve the reliability of the guide plate 10 when moving along the transverse bridge direction.

[0074] In order to more clearly and intuitively see the effect of the vortex-induced vibration suppression device disclosed in this embodiment on the vortex-induced vibration that may be generated by the split double box girder 100, this embodiment also conducts segment model wind tunnel tests on the split double box girder 100 that is not provided with the vortex-induced vibration suppression device disclosed in this embodiment and the split double box girder 100 that is provided with the vortex-induced vibration suppression device disclosed in this embodiment, so as to obtain the relationship between the vertical vortex-induced vibration amplitude (which can be referred to as "vertical vortex vibration amplitude") and the torsional vortex-induced vibration amplitude (which can be referred to as "torsional vortex vibration amplitude") of the two types of split double box girders 100 and the wind speed. Among them, during the test process, the incoming wind attack angle is a positive angle of attack when the incoming wind blows toward the bottom plate of the box girder 101, and a negative angle of attack when it blows toward the bridge deck of the box girder 101.

[0075] like Figure 8 and Fig. 9 As shown, Figure 8 A curve diagram showing the relationship between the vertical vortex-induced vibration amplitude and wind speed of the split double box girder 100 without the vortex-induced vibration suppression device disclosed in this embodiment under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25% is shown; Fig. 9A curve diagram showing the relationship between the torsional vortex-induced vibration amplitude and wind speed of the split double box girder 100 without the vortex-induced vibration suppression device disclosed in this embodiment under the conditions of -3°, 0°, +3° wind attack angles, uniform flow, and a damping ratio of 0.25% is shown. It should be noted that the "split double box girder 100 without the vortex-induced vibration suppression device disclosed in this embodiment" mentioned in this embodiment can also be understood as: a split double box girder 100 with a guide plate 10, and the width of the guide plate 10 along the transverse bridge is equal to 0.00% of the width of the slot 103 along the transverse bridge direction.

[0076] Combination Figure 8 As shown in the content, the test found that at the three wind attack angles of -3°, 0°, and +3°, the vertical vortex-induced vibration locking wind speed range of the split double box girder 100 without the vortex-induced vibration suppression device disclosed in this embodiment is 7.0-9.5m / s, and the corresponding maximum amplitudes of the vertical vortex-induced vibration are 135.4mm, 138.6mm, and 96.2mm, respectively. Fig. 9 It can be seen from the shown content that at the three wind attack angles of -3°, 0° and +3°, the torsional vortex-induced vibration locking wind speed range of the split double box girder 100 that is not equipped with the vortex-induced vibration suppression device disclosed in this embodiment is 25.0~30.0m / s, and the corresponding maximum amplitudes of torsional vortex-induced vibration are 0.13°, 0.18° and 0.02° respectively.

[0077] like Fig.10 and Fig.11 As shown, Fig.10 The split double box girder 100 is provided with the vortex-induced vibration suppression device disclosed in this embodiment, and the width of the guide plate 10 along the transverse bridge direction is equal to 12.50% of the width of the slot 103 along the transverse bridge direction at -3°, 0°,

[0078] The relationship between the amplitude of vertical vortex-induced vibration and wind speed under the conditions of +3° wind attack angle, uniform flow and damping ratio of 0.25%;

[0079] Fig.11 A curve chart showing the relationship between the torsional vortex-induced vibration amplitude and wind speed of a split double box girder 100 provided with the vortex-induced vibration suppression device disclosed in this embodiment and with the width of the guide plate 10 along the transverse bridge direction being equal to 12.50% of the width of the slot 103 along the transverse bridge direction under the conditions of wind attack angles of -3°, 0°, +3°, uniform flow, and a damping ratio of 0.25%.

[0080] Combination Fig.10It can be seen from the content shown that at the three wind attack angles of -3°, 0°, and +3°, after adopting the vortex-induced vibration suppression device disclosed in this embodiment, and the width of the guide plate 10 along the transverse bridge direction is equal to 12.50% of the width of the slot 103 along the transverse bridge direction, the vertical vortex-induced vibration locking wind speed range of the split double box girder 100 is 7.0-9.5m / s, and the corresponding maximum amplitudes of the vertical vortex-induced vibration are 112mm, 109mm, and 77mm, respectively. Compared with the split double box girder 100 that is not equipped with the vortex-induced vibration suppression device disclosed in this embodiment, the maximum amplitudes of the vertical vortex-induced vibration are reduced by 17.3%, 21.3%, and 20%, respectively. Accordingly, combined with Fig.11 As shown in the content, at the two wind attack angles of -3° and 0°, the torsional vortex-induced vibration locking wind speed range of the split double box girder 100 equipped with the vortex-induced vibration suppression device disclosed in this embodiment is 25.0~30.0m / s, and the corresponding maximum amplitudes of torsional vortex-induced vibration are 0.11° and 0.14°, respectively. Compared with the split double box girder 100 not equipped with the vortex-induced vibration suppression device disclosed in this embodiment, the maximum amplitudes of torsional vortex-induced vibration are reduced by 15.4% and 22.2%, respectively.

[0081] like Fig.12 and Fig.13 As shown, Fig.12 The split double box girder 100 is provided with the vortex-induced vibration suppression device disclosed in this embodiment, and the width of the guide plate 10 along the transverse bridge direction is equal to 18.75% of the width of the slot 103 along the transverse bridge direction at -3°, 0°,

[0082] The relationship between the amplitude of vertical vortex-induced vibration and wind speed under the conditions of +3° wind attack angle, uniform flow and damping ratio of 0.25%;

[0083] Fig.13 A curve chart showing the relationship between the torsional vortex-induced vibration amplitude and wind speed of a split double box girder 100 provided with the vortex-induced vibration suppression device disclosed in this embodiment and with the width of the guide plate 10 along the transverse bridge direction being equal to 18.75% of the width of the slot 103 along the transverse bridge direction under the conditions of wind attack angles of -3°, 0°, +3°, uniform flow, and a damping ratio of 0.25%.

[0084] Combination Fig.12 It can be seen from the content shown that at the two wind attack angles of 0° and -3°, the maximum amplitude of the vertical vortex-induced vibration of the split double box girder 100 is reduced from 138.6mm and 135.4mm to 50.0mm and 17.7mm respectively. Compared with the split double box girder 100 without the vortex-induced vibration suppression device disclosed in this embodiment, the maximum amplitude of the vertical vortex-induced vibration is reduced by 64% and 87% respectively, indicating that the vortex-induced vibration suppression device disclosed in this embodiment has a good suppression effect on the vertical vortex-induced vibration of the split double box girder 100. At the same time, combined with Fig.13It can be seen from the shown contents that the split double box girder 100 provided with the vortex-induced vibration suppression device disclosed in this embodiment basically does not experience torsional vortex-induced vibration.

[0085] like Figures 14 to 19 As shown, Fig.14 , Fig.16 as well as Fig.18 The graphs respectively show the relationship between the vertical vortex-induced vibration amplitude and the wind speed of the split double box girder 100 provided with the vortex-induced vibration suppression device disclosed in the present embodiment, and the width of the guide plate 10 along the transverse bridge direction is equal to 25.00%, 37.50%, and 50.00% of the width of the slot 103 along the transverse bridge direction under the conditions of -3°, 0°, and +3° wind attack angles, uniform flow, and a damping ratio of 0.25%; Fig.15 , Fig.17 as well as Fig.19 Curve graphs showing the relationship between the torsional vortex-induced vibration amplitude and wind speed of a split double box girder 100 provided with the vortex-induced vibration suppression device disclosed in this embodiment and with the width of the guide plate 10 along the transverse bridge direction being equal to 25.00%, 37.50%, and 50.00% of the width of the slot 103 along the transverse bridge direction under the conditions of wind attack angles of -3°, 0°, and +3°, uniform flow, and a damping ratio of 0.25%.

[0086] Combination Figures 14 to 19 As can be seen from the shown contents, the experiment found that after adopting the vortex-induced vibration suppression device disclosed in this embodiment, and the width of the guide plate 10 along the transverse bridge direction is greater than or equal to 25.00% of the width of the slot 103 along the transverse bridge direction, when the damping ratio is 0.25%, the vertical vortex-induced vibration and torsional vortex-induced vibration of the split double box girder 100 are basically completely eliminated.

[0087] In summary, it can be seen that the vortex-induced vibration suppression device disclosed in this embodiment can effectively suppress the vortex-induced vibration that may be generated by the split double box girder 100 by setting a guide plate 10 that extends along the transverse direction and has an adjustable width, thereby improving the vortex-induced vibration performance of the split double box girder 100.

[0088] Example 2

[0089] On the basis of Example 1, considering that the split double box girder 100 is generally used in an open-air environment, during a long period of service, it is inevitable that there may be some foreign objects on the movement path of the guide plate 10 at the slot 103. On this basis, if the guide plate 10 is driven to move along the transverse bridge direction by the adjustment drive mechanism 20, especially in the process of the guide plate 10 moving from the inside of the accommodating cavity 1011 to the outside of the accommodating cavity 1011 along the transverse bridge direction, foreign objects on the movement path of the guide plate 10 may cause the guide plate 10 to become stuck. At this time, if the drive motor 23 and other components are not stopped in time, the drive motor 23 and other components may fail or even be damaged. Since the drive motor 23 and other components are arranged in the accommodating cavity 1011, it is difficult to inspect and maintain them.

[0090] In view of this, the present embodiment provides another adjustable vortex-induced vibration suppression device for a split double box girder 100. Different from Embodiment 1, the present embodiment makes further improvements to the adjustment drive mechanism 20, so that when the drive motor 23 works to move the guide plate 10 along the transverse direction, if foreign matter appears on the movement path of the guide plate 10 so that the guide plate 10 is stuck, the drive motor 23 can be stopped in time, thereby effectively ensuring the service life of components such as the drive motor 23.

[0091] Specifically, combined Figure 5 As shown in the figure, the adjustment drive mechanism 20 may further include a sensing component 27 and a triggering component 28 suitable for triggering the sensing component 27. The sensing component 27 has a triggering state and a non-triggering state, and the sensing component 27 is arranged on the movement path of the corresponding guide plate 10. For example, the sensing component 27 may be arranged in the accommodating cavity 1011 and located on the movement path of the guide plate 10, so that the accommodating cavity 1011 provides protection for the sensing component 27.

[0092] The trigger component 28 can be arranged on the corresponding guide plate 10 so that the trigger component 28 can move synchronously with the corresponding guide plate 10. For example, the trigger component can be Figure 5 In the manner shown, the components are arranged at the bottom of the corresponding guide plate 10. In addition, the trigger component 28 is also configured to repeatedly trigger the sensing component 27 at predetermined time intervals when the guide plate 10 moves in the transverse direction, so that the sensing component 27 can alternately change between the triggered state and the non-triggered state in sequence.

[0093] In other words, when the driving motor 23 works to make the guide plate 10 move along the transverse bridge direction, the trigger component 28 can trigger the sensing component 27 once every predetermined time interval (for example, 1s, 2s or 3s, etc.), so that in the process of the trigger component 28 moving synchronously with the guide plate 10, the sensing component 27 can alternately switch between the triggered state and the non-triggered state in sequence.

[0094] In this way, when the driving motor 23 is working to drive the guide plate 10 to move along the transverse bridge direction, if there is no foreign matter on the moving path of the guide plate 10, the guide plate 10 will not be stuck, and at this time, the sensing component 27 can normally alternate between the trigger state and the non-trigger state in sequence; on the contrary, if there is a foreign matter on the moving path of the guide plate 10 to cause the guide plate 10 to be stuck, the trigger component 28 will not trigger the sensing component 27 at a predetermined time interval, so that the sensing component 27 cannot continue to alternate between the trigger state and the non-trigger state in sequence. It can be seen that through the setting of the sensing component 27 and the trigger component 28, it is only necessary to monitor in real time whether the sensing component 27 alternates between the trigger state and the non-trigger state at a predetermined time interval, so as to determine whether there is a foreign matter on the moving path of the guide plate 10 to cause the moving guide plate 10 to be stuck, which is conducive to stopping the driving motor 23 in time to avoid further failures.

[0095] The sensing component 27 may be a photoelectric sensor, and the trigger component 28 may be a trigger sheet. Figure 7 As shown, the trigger component 28 may include a plurality of triggering portions 281 suitable for triggering the sensing component 27, and the plurality of triggering portions 281 are sequentially spaced along the transverse bridge direction. Moreover, the spacing between two adjacent triggering portions 281 in the plurality of triggering portions 281 is equal. At the same time, in order to make the time required for the sensing component 27 to alternate between the trigger state and the non-trigger state each time the same, the spacing between two adjacent triggering portions 281 is equal to the width of a single triggering portion 281 along the transverse bridge direction.

[0096] Thus, assuming that in the initial state, the guide plate 10 is hidden in the accommodating cavity 1011, at this time, the width of the guide plate 10 along the transverse bridge direction is equal to 0.00% of the width of the slot 103 along the transverse bridge direction, and the first triggering portion 281 of the triggering component 28 close to the slot 103 is aligned with the sensing component 27 to trigger the sensing component 27, so that the sensing component 27 is in the triggered state. On this basis, if the driving motor 23 works to make the guide plate 10 move along the transverse bridge direction toward the direction where the slot 103 is located (specifically, uniform motion), the guide plate 10 will drive the triggering component 28 to move synchronously, and when the triggering component 28 moves to the area between the first triggering portion 281 and the second triggering portion 281 and is aligned with the sensing component 27, the sensing component 27 will be changed to the non-triggered state, and so on, that is, in the process of the triggering component 28 following the synchronous movement of the guide plate 10, the triggering component 28 is allowed to trigger the sensing component 27 at a predetermined time interval, so that the sensing component 27 is alternately changed between the triggered state and the non-triggered state at a predetermined time interval.

[0097] In order to realize automatic monitoring of the movement process of the guide plate 10, so as to stop the driving motor 23 in time. Figure 4 As shown, the vortex-induced vibration suppression device disclosed in this embodiment may also include a control box 30 provided with a controller (not shown in the figure) and corresponding to the adjustment drive mechanism 20. Among them, the aforementioned induction component 27 and the drive motor 23 can be communicatively connected to the controller in the corresponding control box 30, so as to obtain the state of the corresponding induction component 27 through the controller, and control the corresponding drive motor 23 to work through the controller.

[0098] For example, the time required for the sensing component 27 to change from the triggered state to the non-triggered state once (i.e., the "predetermined time interval" mentioned above) can be preset in the controller. In this way, when the guide plate 10 drives the trigger component 28 to move synchronously, the controller can monitor in real time whether the sensing component 27 changes between the triggered state and the non-triggered state at a predetermined time interval. When the controller detects that the sensing component 27 does not alternate between the triggered state and the non-triggered state at a predetermined time interval, it means that the moving guide plate 10 is stuck. At this time, the controller can control the drive motor 23 to stop working in time to avoid further failures.

[0099] The control box 30 may be disposed on the corresponding box beam 101 , for example, on the outside of the anti-collision guardrail 104 of the box beam 101 , so as to facilitate maintenance of the control box 30 at a later stage.

[0100] In addition, each adjustment drive mechanism 20 may also include two limit switches (not shown in the figure). One of the limit switches may be set at the initial position of the guide plate 10 (that is, the position of the guide plate 10 when the width of the guide plate 10 along the transverse bridge direction is equal to 0.00% of the width of the slot 103 along the transverse bridge direction), so as to limit the initial position of the guide plate 10 through the limit switch; correspondingly, the other limit switch may be set at the maximum limit position of the guide plate 10 (that is, the position of the guide plate 10 when the width of the guide plate 10 along the transverse bridge direction is equal to 50.00% of the width of the slot 103 along the transverse bridge direction), so as to limit the maximum limit position of the guide plate 10 through the limit switch.

[0101] In this way, the movement range of the guide plate 10 can be limited by the cooperation of the two limit switches. At the same time, both limit switches can be connected to the corresponding controller for communication, so that the controller can cooperate with the two limit switches to reasonably control the drive motor 23 to prevent the guide plate 10 from exceeding its own limit movement range when moving.

[0102] In addition, an alarm connected to the controller can be provided in the control box 30, and the alarm can be connected to an external terminal (such as a mobile phone, a computer, etc.), so that when the controller detects that the movement of the guide plate 10 along the transverse direction is abnormal, the controller can send an alarm message to the external terminal through the alarm, so that relevant personnel can deal with the abnormality in time. Among them, the alarm can be a wireless alarm with wireless communication function.

[0103] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable vortex-induced vibration suppression device for a split double box girder, the split double box girder comprising two box girders symmetrically arranged in the transverse direction of the bridge, a plurality of transverse connecting beams spaced apart in the direction of the bridge are arranged between the two box girders, a slot is formed between two adjacent transverse connecting beams, characterized in that: The adjustable vortex-induced vibration suppression device includes a guide plate; The box beams located on both sides of each slot are provided with guide plates extending along the transverse direction toward the center of the slot, and the length of each guide plate along the longitudinal direction is equal to the length of the slot along the longitudinal direction; Wherein, the width of each guide plate along the transverse direction of the bridge can be adjusted.

2. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 1 is characterized in that: The width of the guide plate along the transverse bridge direction is equal to 0.00% to 50.00% of the width of the slot along the transverse bridge direction.

3. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 1 or 2, characterized in that: The guide plate is movably connected to the corresponding box beam so that the guide plate can reciprocate along the transverse bridge direction; The vortex-induced vibration suppression device also includes an adjustment drive mechanism corresponding to each of the guide plates, and the adjustment drive mechanism is configured to drive the corresponding guide plate to reciprocate along the transverse bridge direction.

4. The adjustable vortex-induced vibration suppression device for split double box beams according to claim 3 is characterized in that: The adjustment drive mechanism includes a rack, a gear and a drive motor; The rack is arranged on the guide plate and extends in the transverse direction. The gear transmission is connected to the drive motor so that the drive motor drives the gear to rotate, and the gear is meshed with the rack.

5. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 4 is characterized in that: The adjustment drive mechanism also includes a reducer and a rotating shaft. The reducer is transmission-connected to the output end of the drive motor, the rotating shaft is transmission-connected to the reducer, and the gear is coaxially arranged on the rotating shaft.

6. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 4 is characterized in that: A receiving cavity is provided inside the box beam corresponding to the guide plate, and the receiving cavity has an inlet and an outlet; The driving motor and the gear are both arranged in the accommodating cavity, and the guide plate extends from the inlet and outlet to the accommodating cavity on one side close to the box beam.

7. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 4 is characterized in that: The adjustment drive mechanism further includes a sensing component and a triggering component, wherein the sensing component has a triggering state and a non-triggering state, and the sensing component is arranged on the movement path of the corresponding guide plate; The trigger component is configured to move synchronously with the corresponding guide plate, and the trigger component is also configured to repeatedly trigger the sensing component at predetermined time intervals when the guide plate moves along the transverse bridge direction, so that the sensing component can alternately switch between the triggered state and the non-triggered state in sequence.

8. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 7 is characterized in that: The sensing component is a photoelectric sensor; The trigger component includes multiple trigger parts suitable for triggering the sensing component, and the multiple trigger parts are arranged in sequence along the transverse bridge direction. The distance between two adjacent trigger parts in the multiple trigger parts is equal, and the distance between two adjacent trigger parts is equal to the width of a single trigger part along the transverse bridge direction.

9. The adjustable vortex-induced vibration suppression device for split double box girders according to claim 7, characterized in that: The adjustable vortex-induced vibration suppression device also includes a control box provided with a controller and corresponding one-to-one with the adjustment drive mechanism, and the drive motor and the induction component are both communicatively connected to the corresponding controller.

10. The adjustable vortex-induced vibration suppression device for split double box beams according to claim 3, characterized in that: The guide plate is slidably connected to the corresponding box beam so that the guide plate can reciprocate along the transverse bridge direction in a sliding manner.

Images