CN203625766U - Vibration elimination plate for controlling vortex-induced vibration of bridge - Google Patents
Vibration elimination plate for controlling vortex-induced vibration of bridge Download PDFInfo
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- CN203625766U CN203625766U CN201320828934.5U CN201320828934U CN203625766U CN 203625766 U CN203625766 U CN 203625766U CN 201320828934 U CN201320828934 U CN 201320828934U CN 203625766 U CN203625766 U CN 203625766U
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Abstract
The utility model discloses a vibration elimination plate for controlling vortex-induced vibration of a bridge and belongs to the technical field of the bridges. The vibration elimination plate for controlling vortex-induced vibration of the bridge comprises lower stand columns and upper stand columns. A plurality of arc-shaped lower stand columns are evenly distributed on an edge beam of a bridge body in the bridge direction. The upper stand columns are fixed to the upper ends of the lower stand columns respectively. A round tube and steel bars are installed between every two adjacent lower stand columns to form an overhaul road handrail. A plurality of rows of semioval steel barrier strips are arranged between every two adjacent upper stand columns. The vibration elimination plate for controlling vortex-induced vibration of the bridge eliminates negative influences on the wind resistance coefficient due to the fact that a wind break is directly arranged on a bridge floor, and is capable of effectively restraining the vortex-induced resonance phenomenon of a main beam at a positive attack angle.
Description
Technical field
The utility model relates to bridge technology field, particularly a kind of for controlling the vibration plate that presses down of bridge vortex-induced vibration.
Background technology
The vortex-induced vibration of bridge main beam belongs to forced vibration, its mechanism is: when there being wind to do the used time on girder, in the both sides of girder and wake flow, the whirlpool periodically coming off will be produced, and then alternately come off to opposite side by a side, the whirlpool periodically coming off can make the air pressure on girder surface be periodic variation, consequently make to produce periodically variable power on girder beam body, when the cycle of power and certain rank vibration frequency of bridge are swashed while approaching in this whirlpool, the forced vibration that girder will generating period.Long-span bridge girder construction is more flexible, from the feature such as heavy and light, damping be little, under lower wind speed, can there is vortex-induced vibration, vortex-induced vibration is with self-excitation and certainly limit double properties.Thereby although shaking can not disperse to vibrate as galloping, flutter, whirlpool bring very large wind load to make the destructive destruction of structure generation, but in the time that the de-frequency in whirlpool approaches the intrinsic frequency of bridge, can inspire larger amplitude, form whirlpool and swash resonance, likely cause the fatigue failure of structure, and affect the comfortableness of bridge floor driving.
According to the Flow Field Distribution of split type case beam and variation characteristic, the reason of the good Bridge beam generation vortex-induced vibration that continues is as follows: vortex arising is in the quiet wind space of slot area, under the impact of incoming flow, form and periodically come off in leeward curb girder section, produce the sharp resonance in whirlpool that the sharp power in larger whirlpool causes bridge, as shown in Figure 1.By " highway bridge wind force proofing design standard ", become the amplitude admissible value of bridge state vortex-induced vibration to be:
Vertically [ha]=0.04/fh=0.04/0.269=0.149m=149mm
Above-mentioned amplitude admissible value divided by
obtain root mean square (being RMS) amplitude admissible value:
Vertically [ha]=105mm.
As seen from Figure 1, the good bridge split steel case beam vortex-induced vibration amplitude that continues all exceedes code requirement value 105mm.To affect comfortableness and the safety of bridge floor driving compared with the vortex-induced vibration of large amplitude, and affect the application life of bridge, therefore vortex-induced vibration need to be found in time and adopt an effective measure and avoided in the time of design.
Conventionally the split case beam whirlpool control measure of shaking have two kinds of means:
1) entreat slotted zones aerodynamic Measures, weaken the whirlpool intensity of slot area, prevent the formation of macro-energy whirlpool from source.The concrete measure adopting has the semiclosed and central slot flow-disturbing measure of deflector, central slot is set at the bottom of beam, as Fig. 2, Fig. 3 and Fig. 4.
Results of wind tunnel shows, air-flow by after deflector by jet higher formation speed, be conducive to impact the main whirlpool of central slot side, and main whirlpool be separated into the whirlpool that several energy are less, thereby main whirlpool size reduction energy is weakened, and whirlpool is swashed power and is also weakened thereupon.The near distance at the bottom of apart from beam is like proportional with deflector for the damping efficiency of deflector under positive incidence, and it is best to leave distance damping effect in the time of 0.9m at the bottom of beam.But to deflector apart from beam at the bottom of when 0.9m, will clash with tool car, therefore cannot realize textural.Other other pneumatic means of central slot region division (as shown in Figure 3 and Figure 4) damping DeGrains, and also larger on the impact of girder self aerodynamic parameter, and the difficulty realizing in reality is also larger;
2) weaken or shield bridge floor incoming flow, preventing that the macro-energy whirlpool in central slot region from coming off downstream, making it at central slot intra-zone consumed energy, weakening its periodically active force; The main mode that adopts bridge floor air partition, by increasing the zone of silence height of bridge floor both sides, can prevent that bridge floor incoming flow from importing in the whirlpool in central slot region increases its intensity, swashs power to weaken the whirlpool that macro-energy whirlpool produces downwind side girder.
Utility model content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, a kind of vibration plate that presses down for the control of bridge vortex-induced vibration is provided, overcome directly, at bridge floor, the adverse effect of air partition to air resistance coefficient has been set, covibration is swashed in the whirlpool that can effectively suppress under girder positive incidence condition, it is highly less, ventilative rate is larger, and major function is to shake for controlling whirlpool, and function is different from traditional air partition; And along with structural damping ratio be increased to 0.46% level time, whirlpool amplitude can further reduce, under the damping ratio of code requirement, there is the faint whirlpool phenomenon of shaking in structure, whirlpool amplitude, far below standard permissible value, has substantially been eliminated whirlpool and has been swashed covibration.
The technical solution adopted in the utility model is as follows:
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, comprise lower pillar stand and upper pillar stand, on the side bar of pontic along bridge to being evenly equipped with some curved lower pillar stands, on each lower pillar stand, be all fixed with upper pillar stand, between any two adjacent lower pillar stands, pipe be installed and steel bar forms maintaining roadway railing; The half elliptic steel barrier of many rows bars are installed between any two adjacent upper pillar stands.
Owing to having adopted said structure, press down vibration plate and formed by upper and lower two parts, bottom is divided into the lower pillar stand of arc, pipe and steel bar is installed between lower pillar stand and is formed maintaining roadway railing, is convenient to the maintenance to miscellaneous equipment on bridge arbitrarily; The first half is the upper pillar stand of T section, and half elliptic steel barrier bar is installed between the upper pillar stand of T section; Between the upper and lower two parts of column, connect with high-strength bolt, the whole vibration plate that presses down adopts cylinder structure, by the heavy anticorrosion coating protection that carries out, and all member and same life-spans of bridge, free of replacement, maintenance is convenient.On two side bars of pontic, install and press down vibration plate, by increasing the zone of silence height of bridge floor both sides, can prevent that bridge floor incoming flow from importing in the whirlpool in central slot region increases its intensity, swashs power to weaken the whirlpool that macro-energy whirlpool produces downwind side girder.Pressing down vibration plate shakes and controls significantly (having eliminated the whirlpool under positive incidence shakes) of effect the whirlpool of positive incidence, it is former because under positive incidence condition, suppressing plate increases the screening height of air-flow, and bridge floor zone of silence increases, and has larger space to make the whirlpool dissipation energy at central slot place.Make this press down vibration plate and realize three functions: 1) railing function, be arranged on region, bridge maintenance road, there is maintaining roadway railing function; 2) small-sized air partition function, column forms choke structure with barrier bar, bridge dilly is played to the effect of air partition, but be different from conventional bridge air partition, because structure height is less than conventional air partition, barrier bar quantity and spacing is little, the wind resistance that bridge is formed is little, and Wind-resistance of Bridges safety factor is high; 3) the anti-whirlpool function of shaking.Destroy bridge floor to from pressing down the smooth air of vibration plate altitude range, for the bridge of girder left and right framing, power is swashed in the air-flow that can avoid rising between bridge floor air-flow and the left and right width beam body whirlpool forming that crosses, the performance thereby the anti-whirlpool of entirety of improving bridge shakes.
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, is furnished with the steel barrier bar that three rows are parallel to each other between any two adjacent upper pillar stands; The half elliptic concave surface of described steel barrier bar is towards pontic inner side.
Owing to having adopted said structure, steel barrier bar arranges too much or very few, all can affect to a certain extent the size of ventilation rate, need the ventilative rate of control be below 50% because this presses down arranging of vibration plate, could effectively suppress vortex-induced vibration; Half elliptic steel barrier bar, play on the one hand the effect of wind screen, on the one hand can effectively control ventilation rate in addition and to the sharp interference in whirlpool, half elliptic concave surface is towards pontic inner side, make distinguished and admirable after this presses down vibration plate, can circle round and enter in half elliptic concave surface, thereby play flow-disturbing effect to distinguished and admirable, can effectively avoid forming whirlpool on bridge floor.
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, the bridge floor height of the distance from top pontic of described upper pillar stand is 2.8m-3.0m, between any two adjacent lower pillar stands or between two adjacent upper pillar stands, be spaced apart 2000mm, and be spaced apart 370mm between two row's steel barrier bars of arbitrary neighborhood.
Owing to having adopted said structure, setting presses down vibration plate and there will be vortex-induced vibration under negative angle of attack condition, and it is former because be in fact to have reduced the screening height of suppressing plate to air-flow under negative angle of attack, makes the whirlpool of certain energy still tear-away to downwind side girder surface.In addition, find by test, press down the height of vibration plate and ventilative rate larger on suppressing the whirlpool impact of shaking, considered multiple suppressing plate measure in research, result of the test shows, ventilative rate is below 50%, and air partition height, in 3m left and right, can effectively suppress vortex-induced vibration.But higher air partition and less ventilative rate will significantly increase the air resistance coefficient of girder, key dimension is increased.Therefore, pass through repetition test, finally be chosen in the height of selecting 2.9m in engineering and (count the height of following maintaining roadway railing, and can be controlled in 2.8m-3.0m), ventilative rate is 50% the vibration plate that presses down, actual choke region is in 2m-2.9m scope, and the air resistance coefficient of girder is that not add while pressing down vibration plate be 1.3 to 1.6(); Interval between the interval between column and steel barrier bar is the control realizing ventilative rate, only has as the concrete size arranging in the utility model, just can guarantee that the whole ventilative rate that presses down vibration plate is 50%, guarantees effectively to suppress vortex-induced vibration.
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, the damping ratio of described pontic is 0.46%, the whole ventilation rate that presses down vibration plate is 50%.
Owing to having adopted said structure, control that whole to press down the ventilative rate of vibration plate be 50% presses down vibration plate, covibration is swashed in the whirlpool that can effectively suppress under girder positive incidence condition; The wind tunnel test of large scale Segment Model vortex-induced vibration shows, in the time that damping ratio is increased to 0.38% by 0.3%, the whirlpool amplitude RMS value of girder is further reduced to 46mm; In the time that damping ratio is increased to 0.46% level, (code requirement is 0.5%) can eliminate the sharp covibration in whirlpool substantially.
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, the arc-shaped concave of described lower pillar stand is towards pontic inner side, and the slanted angle of the vertical direction of described upper pillar stand and bridge floor is a, and wherein the tan of this slanted angle is tan a=1:5.
Owing to having adopted said structure, make the whole bottom convex that presses down vibration plate, top slopes inwardly, and the ventilation rate that should press down vibration plate is 50%, make the distinguished and admirable flows at angles tilting along upper pillar stand not being passed to bridge floor top, be dispersed and strictly controlled due to distinguished and admirable the angle of inclination (tan of slanted angle is tan a=1:5) that this presses down vibration plate, can effectively avoid forming whirlpool above bridge floor, thereby can effectively realize the control that whirlpool is shaken.
The vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, the cross section of described lower pillar stand is " work " character form structure, and the cross section of described upper pillar stand is " T " character form structure, and described upper pillar stand is bolted on lower pillar stand.
Owing to having adopted said structure, more surely lean in order to ensure the whole structure that presses down vibration plate, to avoid being destroyed in typhoon, the cross section of designing its lower pillar stand is " work " character form structure, can be used for forming maintaining roadway railing through steel pipe, guarantees maintainer's safety; And hinder bar due to steel will be installed on upper pillar stand, and being therefore set to " T " character form structure, the two ends of being convenient to steel barrier bar are bolted on upper pillar stand; Between upper pillar stand and lower pillar stand, be connected by high-strength bolt, easy access is changed.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
1, the vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, overcome directly, at bridge floor, the adverse effect of air partition to air resistance coefficient has been set, covibration is swashed in the whirlpool that can effectively suppress under girder positive incidence condition, it is highly less, ventilative rate is larger, major function is to shake for controlling whirlpool, and function is different from traditional air partition;
2, the vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, along with structural damping ratio be increased to 0.46% level time, whirlpool amplitude can further reduce, under the damping ratio of code requirement, there is the faint whirlpool phenomenon of shaking in structure, whirlpool amplitude, far below standard permissible value, has substantially been eliminated whirlpool and has been swashed covibration.
Accompanying drawing explanation
Fig. 1 is the good Bridge beam vortex shedding schematic diagram (original section) that continues;
Fig. 2 is deflector schematic diagram at the bottom of beam (apart from 0.9m at the bottom of beam);
Fig. 3 is the semiclosed measure schematic diagram of central slot;
Fig. 4 is central slot flow-disturbing measure schematic diagram;
Fig. 5 is the structural representation that presses down vibration plate of the present utility model;
Fig. 6 is the sectional view of A-A in Fig. 5.
Mark in figure: 1-pontic, 2-lower pillar stand, 3-upper pillar stand, 4-steel bar, 5-steel barrier bar, 6-pipe, 7-bolt.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 5 and Figure 6, the vibration plate that presses down for the control of bridge vortex-induced vibration of the present utility model, comprise lower pillar stand 2 and upper pillar stand 3, on the side bar of pontic 1 along bridge to being evenly equipped with some curved lower pillar stands 2, the cross section of described lower pillar stand 2 is " work " character form structure, on each lower pillar stand 2, is all fixed with upper pillar stand 3, and the cross section of described upper pillar stand 3 is " T " character form structure, described upper pillar stand 3 is connected on lower pillar stand 2 by bolt 7, and the damping ratio of described pontic 1 is 0.46%; Wherein 3 of 2 of any two adjacent lower pillar stands or two adjacent upper pillar stands be spaced apart 2000mm; Between any two adjacent lower pillar stands 2, pipe 6 is installed and steel bar 4 forms maintaining roadway railing; The half elliptic steel barrier bar 5 that three rows are parallel to each other is installed between any two adjacent upper pillar stands 3, the half elliptic concave surface of described steel barrier bar 5 is towards pontic 1 inner side, wherein two of arbitrary neighborhood row's steel hinder the 370mm that is spaced apart of 5 of bars, and making the whole ventilation rate that presses down vibration plate is 50%.The arc-shaped concave of described lower pillar stand 2 is towards pontic 1 inner side, and described upper pillar stand 3 is a with the slanted angle of the vertical direction of bridge floor, and wherein the tan of this slanted angle is tan a=1:5.
The vibration plate that presses down of the present utility model is made up of upper and lower two parts, and bottom is divided into the lower pillar stand of arc, pipe and steel bar is installed between lower pillar stand and is formed maintaining roadway railing, is convenient to the maintenance to miscellaneous equipment on bridge arbitrarily; The first half is the upper pillar stand of T section, and half elliptic steel barrier bar is installed between the upper pillar stand of T section; Between the upper and lower two parts of column, connect with high-strength bolt, the whole vibration plate that presses down adopts cylinder structure, by the heavy anticorrosion coating protection that carries out, and all member and same life-spans of bridge, free of replacement, maintenance is convenient.On two side bars of pontic, install and press down vibration plate, by increasing the zone of silence height of bridge floor both sides, can prevent that bridge floor incoming flow from importing in the whirlpool in central slot region increases its intensity, swashs power to weaken the whirlpool that macro-energy whirlpool produces downwind side girder.Pressing down vibration plate shakes and controls significantly (having eliminated the whirlpool under positive incidence shakes) of effect the whirlpool of positive incidence, it is former because under positive incidence condition, suppressing plate increases the screening height of air-flow, and bridge floor zone of silence increases, and has larger space to make the whirlpool dissipation energy at central slot place.Make this press down vibration plate and realize three functions: 1) railing function, be arranged on region, bridge maintenance road, there is maintaining roadway railing function; 2) small-sized air partition function, column forms choke structure with barrier bar, bridge dilly is played to the effect of air partition, but be different from conventional bridge air partition, because structure height is less than conventional air partition, barrier bar quantity and spacing is little, the wind resistance that bridge is formed is little, and Wind-resistance of Bridges safety factor is high; 3) the anti-whirlpool function of shaking.Destroy bridge floor to from pressing down the smooth air of vibration plate altitude range, for the bridge of girder left and right framing, power is swashed in the air-flow that can avoid rising between bridge floor air-flow and the left and right width beam body whirlpool forming that crosses, the performance thereby the anti-whirlpool of entirety of improving bridge shakes.
To weakening or shielding bridge floor incoming flow, prevent that the macro-energy whirlpool in central slot region from coming off downstream, make it at central slot intra-zone consumed energy, weaken its periodically active force; The utility model mainly adopts bridge floor to press down the mode of vibration plate, and by increasing the zone of silence height of bridge floor both sides, can prevent that bridge floor incoming flow from importing in the whirlpool in central slot region increases its intensity, swashs power to weaken the whirlpool that macro-energy whirlpool produces downwind side girder.
Experimental study shows, press down vibration plate the whirlpool of positive incidence is shaken and controls significantly (having eliminated the whirlpool under positive incidence shakes) of effect, it is former because under positive incidence condition, and suppressing plate increases the screening height of air-flow, bridge floor zone of silence increases, and has larger space to make the whirlpool dissipation energy at central slot place.But there will be vortex-induced vibration under negative angle of attack condition, it is former because be in fact to have reduced the screening height of suppressing plate to air-flow under negative angle of attack, make the whirlpool of certain energy still tear-away to downwind side girder surface.In addition, find by test, press down the height of vibration plate and ventilative rate larger on suppressing the whirlpool impact of shaking, considered multiple suppressing plate measure in research, result of the test shows, ventilative rate is below 50%, and air partition height, in 3m left and right, can effectively suppress vortex-induced vibration.But higher air partition and less ventilative rate will significantly increase the air resistance coefficient of girder, key dimension is increased.Therefore, by repetition test, finally advise selecting the height (counting the height of following maintaining roadway railing) of 2.9m in engineering, what ventilative rate was 50% presses down vibration plate, actual choke region is in 2m-2.9m scope, and the air resistance coefficient of girder is that not add while pressing down vibration plate be 1.3 to 1.6().
Only there being bridge floor to press down under the condition of vibration plate, structural damping ratio is increased to 0.3% by 0.25% and tests, contrast with the operating mode that does not have installation to press down vibration plate simultaneously.Result of the test shows, under identical damping ratio condition, (be less than code requirement damping ratio), unassembled pressing down under vibration plate condition, girder whirlpool amplitude RMS value has reached 135mm, exceed the 105mm of code requirement, and all exceed limit value under 0 ° and ± 3 ° three kinds wind angle of attack conditions; But after installing additional and shaking, except the RMS amplitude under 0 ° of wind angle of attack condition reaches 70mm, the RMS amplitude under-3 ° of angles of attack reaches outside 50mm, under all the other angles of attack, do not observe obvious whirlpool and swash covibration.Press down compared with the result of vibration plate with being unkitted, install rear whirlpool amplitude additional and reduced by 50% for 0 ° of angle of attack, and the amplitude reducing for other angles of attack is larger, and whirlpool amplitude under the different angle of attack also meets code requirement.For only installing and press down vibration plate, there is no the operating mode of deflector, adopt the mode of increase structural damping ratio to proceed test.The damping ratio of test brings up to respectively 0.38% and 0.46%, and the latter approaches with 0.5% damping ratio that " highway bridge wind force proofing design standard " requires, and the former is significantly lower than code requirement.Therefore shown by result of the test: along with the increase of structural damping ratio, whirlpool amplitude reduces gradually.Under the damping ratio of code requirement, there is the faint whirlpool phenomenon of shaking in structure, and whirlpool amplitude is far below standard permissible value.
In the damping ratio of test while being 0.46% level, right ± 5 °, ± 3 °, the 0 ° angle of attack are tested respectively.According to a series of results of wind tunnel, final suppressing plate is apart from bridge floor height 2.9m, ventilative rate 50%, and under the damping ratio of code requirement, the phenomenon of shaking of the whirlpool under the different angles of attack is eliminated.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. the vibration plate that presses down for the control of bridge vortex-induced vibration, it is characterized in that: it comprises lower pillar stand (2) and upper pillar stand (3), on the side bar of pontic (1) along bridge to being evenly equipped with some curved lower pillar stands (2), on each lower pillar stand (2), be all fixed with upper pillar stand (3), between any two adjacent lower pillar stands (2), pipe (6) be installed and steel bar (4) forms maintaining roadway railing; Between any two adjacent upper pillar stands (3), many half elliptic steel barrier bars of row (5) are installed.
2. the vibration plate that presses down for the control of bridge vortex-induced vibration as claimed in claim 1, is characterized in that: between any two adjacent upper pillar stands (3), be furnished with the steel barrier bar (5) that three rows are parallel to each other; The half elliptic concave surface of described steel barrier bar (5) is towards pontic (1) inner side.
3. the vibration plate that presses down for the control of bridge vortex-induced vibration as claimed in claim 2, it is characterized in that: the bridge floor height of the distance from top pontic (1) of described upper pillar stand (3) is 2.8m-3.0m, between any two adjacent lower pillar stands (2) or between two adjacent upper pillar stands (3), be spaced apart 2000mm, and be spaced apart 370mm between two row's steel barrier bars (5) of arbitrary neighborhood.
4. the vibration plate that presses down for the control of bridge vortex-induced vibration as described in claim 1 or 2 or 3, is characterized in that: the damping ratio of described pontic (1) is 0.46%, and the whole ventilation rate that presses down vibration plate is 50%.
As claimed in claim 2 or claim 3 for the control of bridge vortex-induced vibration press down vibration plate, it is characterized in that: the arc-shaped concave of described lower pillar stand (2) is towards pontic (1) inner side, described upper pillar stand (3) is a with the slanted angle of the vertical direction of bridge floor, and wherein the tan of this slanted angle is tan a=1:5.
6. the vibration plate that presses down for the control of bridge vortex-induced vibration as described in claim 1 or 2 or 3, it is characterized in that: the cross section of described lower pillar stand (2) is " work " character form structure, the cross section of described upper pillar stand (3) is " T " character form structure, and described upper pillar stand (3) is connected on lower pillar stand (2) by bolt (7).
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| CN111831012B (en) * | 2020-07-03 | 2023-09-05 | 长沙理工大学 | Intelligent adjustable wind barrier system on bridge and control method thereof |
| CN112012094B (en) * | 2020-09-22 | 2021-12-07 | 同济大学 | Angle-adjustable flow restraining plate device suitable for bridge deck |
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| CN112629647A (en) * | 2020-11-24 | 2021-04-09 | 同济大学 | Real-time identification, monitoring and early warning method for vortex vibration event of large-span suspension bridge |
| CN112629647B (en) * | 2020-11-24 | 2022-04-08 | 同济大学 | Real-time identification, monitoring and early warning method for vortex vibration event of large-span suspension bridge |
| CN113047464A (en) * | 2021-04-02 | 2021-06-29 | 哈尔滨工业大学 | Passive sweeping jet device for inhibiting wind-induced vibration of large building structure |
| CN113322783A (en) * | 2021-06-11 | 2021-08-31 | 湖南大学 | Sound barrier device and method for inhibiting vortex-induced resonance of girder of long-span bridge |
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