CN103938545A - Self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of stay cable - Google Patents
Self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of stay cable Download PDFInfo
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- CN103938545A CN103938545A CN201410169282.8A CN201410169282A CN103938545A CN 103938545 A CN103938545 A CN 103938545A CN 201410169282 A CN201410169282 A CN 201410169282A CN 103938545 A CN103938545 A CN 103938545A
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Abstract
The invention discloses a self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of a stay cable. The self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of the stay cable comprises multiple round hollow lantern rings, wherein the multiple round hollow lantern rings are fixed to the stay cable at certain intervals, multiple air inlets are formed in the windward side of each round hollow lantern ring, and multiple air outlets are formed in the leeward side of each round hollow lantern ring. Or the self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of the stay cable comprises a spiral hollow lantern ring, wherein the spiral hollow lantern ring is wound around the stay cable in a fastened mode, multiple air inlets are formed in the windward side of the spiral hollow lantern ring, and multiple air outlets are formed in the leeward side of the spiral hollow lantern ring. According to the self-air-sucking and self-air-blowing vibration damping device for controlling wind-induced vibration of the stay cable, the pulsating pressure on the surface of the stay cable is greatly reduced, and the lift force of the surface of the stay cable is greatly reduced. Due to the fact that wake flow can not form vortexes which fall alternately, the width of the wake flow is reduced to a certain degree, and the resistance of the surface of the stay cable is reduced to a certain degree. The shape of the surface of the stay cable is changed, waterlines can be prevented from being formed on the surface of the stay cable to a certain degree, and wind-induced vibration of the stay cable is prevented.
Description
Technical field
The present invention relates to bridge construction wind vibration control technology, be specifically related to a kind of Self inhaling of suspension cable wind-induced vibration from blowing vibration absorber.
Background technology
Along with the increase of span, its bridge tower size is also increasing.For large-span suspension bridge, a lot of reinforced concrete bridge tower section sizes can reach 20-30 rice, the scope of charming appearance and behaviour Flow Field can reach several times bridge tower sectional dimension, so near suspension cable bridge tower both sides is in its bluff body Flow Field, is vulnerable to the charming appearance and behaviour interference of bridge tower.Wind is through forming Flow Field around at it after bridge tower, and the frequency of Flow Field pulsation wind speed can be by formula f
v=StU/D obtains, and in formula, St is desirable 0.15 for square column, and U is incoming flow wind speed, and D is that bridge tower is in the projection of incoming flow vertical direction.Because reinforced concrete bridge tower section size is very large, wind reduces greatly through the pulsation wind speed frequency after bridge tower, close to former rank natural frequency of suspension cable, makes suspension cable that amplitude wind-induced vibration easily occur in bridge tower bluff body Flow Field.For large-span suspension bridge suspension cable, during typhoon, wind speed is generally at 20-50m/s.In this wind speed section, very easily there is amplitude wind-induced vibration in suspension cable in bridge tower bluff body Flow Field, easily causes the fatigue damage of suspension cable and the damage of anchor system.While arranging in pairs for suspension cable, also easily there is the mutual collision between paired suspension cable, thereby destroy the anticorrosive coat on suspension cable surface, accelerate the corrosion failure process of suspension cable, also can generate a panic to vehicular traffic simultaneously.Inclined Cable Vibration in Longspan Bridge bridge tower bluff body Flow Field is a new oscillatory type at present, studies its control method, reduces its vibration, for design, construction, use and the man-rate of large span and super-span bridge, has great importance.
At present, the control of suspension cable wind-induced vibration mainly realizes by mechanical devices such as dampers, but result is unsatisfactory, its reason is that current damper is not to design according to the multi-modal vibration of suspension cable, and damper can not fundamentally reduce the wind load of suspension cable, the root of its vibration is not eliminated.If can fundamentally eliminate wind load, suspension cable is isolated from and outside wind field, can reaches good control effect.
Summary of the invention
The object of the present invention is to provide a kind of Self inhaling of suspension cable wind-induced vibration from blowing vibration absorber.
The technology used in the present invention is as follows:
A kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber, comprise a plurality of circular hollow collars, a plurality of circular hollow collars are fastened on suspension cable at regular intervals, and the windward side of each circular hollow collar has a plurality of air inlets, and its leeward side symmetry has a plurality of ventholes.
The Self inhaling of another suspension cable wind-induced vibration is from blowing vibration absorber, comprise the spiral hollow collar, the spiral hollow collar is fastening to be wrapped on suspension cable, and the windward side of the spiral hollow collar has a plurality of air inlets, and its leeward side symmetry has a plurality of ventholes.
A suspension cable bridge is provided with the Self inhaling of two kinds of suspension cable wind-induced vibrations as above from blowing vibration absorber or wherein a kind of on its suspension cable.
The inner collar that also passes of the collar that incoming flow enters hollow by air inlet sprays from venthole.The air-flow spraying by leeward side venthole is broken the vortex in wake flow, stops wake flow to form the vortex alternately coming off, thereby greatly reduces the pressure fluctuation meter on suspension cable surface, significantly reduces the lift on suspension cable surface.Because wake flow cannot form the vortex alternately coming off, also reduce to a certain extent the width of wake flow, made the resistance on suspension cable surface also obtain reduction to a certain degree.Meanwhile, the collar combines, and has changed suspension cable surface configuration, can stop to a certain extent the formation of suspension cable surface waterline, thereby stops the generation of suspension cable rain wind induced vibration.
Accompanying drawing explanation
The circular Self inhaling of Fig. 1 bridge construction suspension cable is boasted gas control collar schematic diagram processed;
Fig. 2 bridge construction stayed-cable screw line Self inhaling is boasted gas control collar schematic diagram processed.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described for example.
Embodiment 1
In conjunction with Fig. 1, a kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber, comprise a plurality of circular hollow collars, a plurality of circular hollow collars are fastened on suspension cable 1 at regular intervals, the windward side of each circular hollow collar has a plurality of air inlets 2, and its leeward side symmetry has a plurality of ventholes 3.
Embodiment 2
In conjunction with Fig. 2, the Self inhaling of another suspension cable wind-induced vibration, from blowing vibration absorber, comprises the spiral hollow collar, and the spiral hollow collar is fastening to be wrapped on suspension cable 1, the windward side of the spiral hollow collar has a plurality of air inlets 2, and its leeward side symmetry has a plurality of ventholes 3.
Embodiment 3
Vibration damping workflow is as follows:
(1) air-flow spraying by collar venthole, breaks the vortex alternately producing in wake flow, stops wake flow whirlpool to form;
(2) collar suspension cable format surface that has been arranged on suspension cable surface modification, can reduce the suffered aerodynamic force of suspension cable.
Bridge construction suspension cable vibration damping protector of the present invention is comprised of the vibration damping collar, air inlet and venthole, the air-flow spraying by collar venthole, break the whirlpool alternately producing in wake flow, stop wake flow whirlpool to form, change suspension cable format surface simultaneously, reduced to a certain extent the aerodynamic force on suspension cable surface.Simple in structure, can reduce well the wind-induced vibration of bridge stay cable.
Claims (3)
1. the Self inhaling of a suspension cable wind-induced vibration is from blowing vibration absorber, it is characterized in that: comprise a plurality of circular hollow collars, a plurality of circular hollow collars are fastened on suspension cable at regular intervals, the windward side of each circular hollow collar has a plurality of air inlets, and its leeward side symmetry has a plurality of ventholes.
2. the Self inhaling of a suspension cable wind-induced vibration is from blowing vibration absorber, it is characterized in that: comprise the spiral hollow collar, the spiral hollow collar is fastening to be wrapped on suspension cable, and the windward side of the spiral hollow collar has a plurality of air inlets, and its leeward side symmetry has a plurality of ventholes.
3. a suspension cable bridge, is characterized in that: on its suspension cable, claim 1 is installed or/and the Self inhaling of a kind of suspension cable wind-induced vibration described in 2 from blowing vibration absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410169282.8A CN103938545B (en) | 2014-04-16 | 2014-04-16 | A kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410169282.8A CN103938545B (en) | 2014-04-16 | 2014-04-16 | A kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber |
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| Publication Number | Publication Date |
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| CN103938545A true CN103938545A (en) | 2014-07-23 |
| CN103938545B CN103938545B (en) | 2016-01-20 |
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| CN201410169282.8A Active CN103938545B (en) | 2014-04-16 | 2014-04-16 | A kind of Self inhaling of suspension cable wind-induced vibration is from blowing vibration absorber |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758816A (en) * | 2017-01-18 | 2017-05-31 | 核工业西南勘察设计研究院有限公司 | Board-like vibration damping suspension rod |
| CN107090768A (en) * | 2017-06-15 | 2017-08-25 | 哈尔滨工业大学 | Bridge structure box girder Self inhaling is from blowing vibration absorber |
| CN107740752A (en) * | 2017-11-21 | 2018-02-27 | 北京金风科创风电设备有限公司 | Surround apparatus and method for suppressing vibration of building envelope |
| CN108035451A (en) * | 2017-09-28 | 2018-05-15 | 哈尔滨工业大学 | The active inspiration flow control apparatus of cylindrical structural wind-induced vibration |
| CN108301325A (en) * | 2018-04-09 | 2018-07-20 | 哈尔滨工业大学 | Nonuniformity surface wind resistance suspension cable |
| CN109826095A (en) * | 2019-02-28 | 2019-05-31 | 深圳大学 | A kind of bridge cable can inhibit rain wind induced vibration |
| CN110863612A (en) * | 2019-12-25 | 2020-03-06 | 苏州中车建设工程有限公司 | Self-suction type suppression device for square column wind-induced vibration |
| CN113279995A (en) * | 2021-04-26 | 2021-08-20 | 交通运输部天津水运工程科学研究所 | Suction-blowing type pneumatic load shedding control system and method for large cylindrical petrochemical storage tank at port |
| CN113882242A (en) * | 2021-11-17 | 2022-01-04 | 哈尔滨工业大学 | Cylindrical structure initiative damping protector that blows based on porous surface of structurization |
| CN114086809A (en) * | 2021-12-02 | 2022-02-25 | 哈尔滨工业大学 | Blunt body wind-induced vibration control device based on structured porous surface active air suction |
| CN114837082A (en) * | 2022-06-07 | 2022-08-02 | 哈尔滨工业大学 | Bridge inhaul cable structure based on feather-shaped bionic structure arranged at front stagnation point |
| CN115538284A (en) * | 2022-10-11 | 2022-12-30 | 高速铁路建造技术国家工程研究中心 | Flat box girder active control structure and method based on zero-mass jet flow |
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| CN203768813U (en) * | 2014-04-16 | 2014-08-13 | 哈尔滨工业大学 | Self-suction and self-gas-blowing damping device with stay cable wind-induced vibration |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758816A (en) * | 2017-01-18 | 2017-05-31 | 核工业西南勘察设计研究院有限公司 | Board-like vibration damping suspension rod |
| CN106758816B (en) * | 2017-01-18 | 2018-09-21 | 核工业西南勘察设计研究院有限公司 | Board-like vibration damping sunpender |
| CN107090768A (en) * | 2017-06-15 | 2017-08-25 | 哈尔滨工业大学 | Bridge structure box girder Self inhaling is from blowing vibration absorber |
| CN108035451A (en) * | 2017-09-28 | 2018-05-15 | 哈尔滨工业大学 | The active inspiration flow control apparatus of cylindrical structural wind-induced vibration |
| CN107740752A (en) * | 2017-11-21 | 2018-02-27 | 北京金风科创风电设备有限公司 | Surround apparatus and method for suppressing vibration of building envelope |
| CN108301325A (en) * | 2018-04-09 | 2018-07-20 | 哈尔滨工业大学 | Nonuniformity surface wind resistance suspension cable |
| CN108301325B (en) * | 2018-04-09 | 2024-04-09 | 哈尔滨工业大学 | Non-uniform surface wind-resistant stay cable |
| CN109826095A (en) * | 2019-02-28 | 2019-05-31 | 深圳大学 | A kind of bridge cable can inhibit rain wind induced vibration |
| CN109826095B (en) * | 2019-02-28 | 2020-08-18 | 深圳大学 | Bridge inhaul cable capable of restraining wind and rain excitation |
| CN110863612A (en) * | 2019-12-25 | 2020-03-06 | 苏州中车建设工程有限公司 | Self-suction type suppression device for square column wind-induced vibration |
| CN113279995B (en) * | 2021-04-26 | 2023-01-31 | 交通运输部天津水运工程科学研究所 | Suction-blowing type pneumatic load shedding control system and method for large cylindrical petrochemical storage tank at port |
| CN113279995A (en) * | 2021-04-26 | 2021-08-20 | 交通运输部天津水运工程科学研究所 | Suction-blowing type pneumatic load shedding control system and method for large cylindrical petrochemical storage tank at port |
| CN113882242A (en) * | 2021-11-17 | 2022-01-04 | 哈尔滨工业大学 | Cylindrical structure initiative damping protector that blows based on porous surface of structurization |
| CN113882242B (en) * | 2021-11-17 | 2023-03-14 | 哈尔滨工业大学 | Cylindrical structure initiative damping protector that blows based on porous surface of structurization |
| CN114086809A (en) * | 2021-12-02 | 2022-02-25 | 哈尔滨工业大学 | Blunt body wind-induced vibration control device based on structured porous surface active air suction |
| CN114086809B (en) * | 2021-12-02 | 2022-12-27 | 哈尔滨工业大学 | Blunt body wind-induced vibration control device based on structured porous surface active air suction |
| CN114837082A (en) * | 2022-06-07 | 2022-08-02 | 哈尔滨工业大学 | Bridge inhaul cable structure based on feather-shaped bionic structure arranged at front stagnation point |
| CN114837082B (en) * | 2022-06-07 | 2024-03-26 | 哈尔滨工业大学 | Bridge guy cable structure based on front standing point arrangement feathered bionic structure |
| CN115538284A (en) * | 2022-10-11 | 2022-12-30 | 高速铁路建造技术国家工程研究中心 | Flat box girder active control structure and method based on zero-mass jet flow |
| CN115538284B (en) * | 2022-10-11 | 2023-09-12 | 高速铁路建造技术国家工程研究中心 | Flat box girder active control structure and method based on zero-mass jet flow |
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