CN215519311U - Structure vortex-induced vibration suppression device - Google Patents
Structure vortex-induced vibration suppression device Download PDFInfo
- Publication number
- CN215519311U CN215519311U CN202121614853.6U CN202121614853U CN215519311U CN 215519311 U CN215519311 U CN 215519311U CN 202121614853 U CN202121614853 U CN 202121614853U CN 215519311 U CN215519311 U CN 215519311U
- Authority
- CN
- China
- Prior art keywords
- vortex
- induced vibration
- suppression device
- vibration suppression
- side edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The utility model relates to the technical field of vortex-induced vibration, in particular to a structure vortex-induced vibration suppression device, wherein a structure is suspended and spanned in a longitudinal direction, the structure is provided with a first lateral edge and a second lateral edge which are opposite in the transverse direction, the structure vortex-induced vibration suppression device comprises a plurality of guide plates suspended on the structure, the guide plates are sequentially arranged at the first lateral edge and the second lateral edge in the longitudinal direction, and the upper ends of the guide plates are hinged on the structure in a manner of rotating around the longitudinal direction. When having the crosswind to blow the structure, the guide plate that rotationally hangs in first lateral margin of structure and second lateral margin department is blown by the crosswind and is swung, the guide plate of lee side then drifts along with the crosswind, the aerodynamic shape of structure has been changed from this, the original vortex of structure has been destroyed and has been generated and the aerodynamic performance who drops, the original vortex of structure generates the mechanism, can restrain the vortex of structure lee side and drop, thereby restrain the emergence of vortex induced vibration, reduce the harm that wind causes vortex induced vibration and bring, ensure the structure safety of structure.
Description
Technical Field
The utility model relates to the technical field of vortex-induced vibration, in particular to a structure vortex-induced vibration suppression device.
Background
In outdoor facilities such as buildings, bridges, and engineering works, there are long and thin structures with a large aspect ratio, such as long-span bridges, pylons, guys, girders, high-rise buildings, and long cantilevers of cranes. The structure has the possibility of generating vortex-induced vibration under a specific wind speed, and has great potential hazards to the safety of the structure. The vortex-induced vibration is a wind-induced vibration phenomenon of a structure at a specific wind speed, the vortex-induced vibration has a self-excitation property, but the vibrating structure can form a certain feedback effect on vortex shedding, so that the amplitude of the vortex vibration is limited, and the vortex-induced resonance is wind-induced amplitude-limiting vibration with the self-excitation property.
The vortex vibration of the structure is not caused by the wind, but is caused by the resonance effect caused by wind load. When the section of the blunt body is acted by uniform flow, vortex shedding can be formed at the back of the section, so that periodically-changed vortex-induced force is generated. If the structure to be induced is a vibrating system, the periodic vortex-induced force will cause vortex-induced vibration of the structure, and vortex-induced resonance will occur when the vortex shedding frequency coincides with the natural vibration period of the structure. The structure can normally shake when meeting special wind conditions, and can shake a lot when meeting vortex wind. Generally, the vortex-induced vibration amplitude is small and not easily detectable, and a large amplitude is generated only under special conditions.
From the fluid point of view, any bluff structure, at a certain constant flow rate, will alternately generate vortices on both sides of the structure, which are detached from the surface of the structure. Vortex-induced vibration, however, is relatively of limited concern for structures because as the amplitude of vibration of the structure continues to increase, the airflow is affected by the vibration of the structure and the periodic shedding of vortices is destroyed. In general, vortex-induced vibration and airflow are mutually balanced, the vortex vibration amplitude cannot be infinitely increased, and the structure is rarely damaged completely. However, since a structure vibrates at a specific wind speed, which poses a serious safety hazard to the structure, methods and means for suppressing vortex-induced vibration of the structure are required.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a structure vortex-induced vibration suppression device, which can suppress the structure vortex-induced vibration so as to overcome the defects in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a structure vortex induced vibration suppression device, the structure is along vertical unsettled strideing and is established, the structure has along horizontal relative first lateral margin and second lateral margin, and structure vortex induced vibration suppression device is including hanging a plurality of guide plates on the structure, and a plurality of guide plates are vertically arranged in proper order at first lateral margin department and second lateral margin department, and the upper end of guide plate can articulate on the structure around longitudinal rotation ground.
Preferably, there is a spacing between adjacent baffles at the same side edge.
Preferably, the plurality of baffles located at the same side edge are arranged at equal intervals in the longitudinal direction.
Preferably, adjacent baffles at the same side edge are spaced apart by a distance not exceeding the vertical dimension of the baffle.
Preferably, the baffle is disposed on a lower surface of the first side edge and the second side edge.
Preferably, the guide plate comprises a plurality of guide plates which are sequentially connected in the vertical direction, and adjacent guide plates are hinged with each other.
Preferably, the guide vane is rectangular in shape as a whole.
Preferably, the guide vane comprises a skeleton and a cover layer covering the skeleton.
Preferably, the vertical dimension of the baffle is of the same order of magnitude as the lateral dimension of the structure.
Preferably, the vertical dimension of the baffle is no less than one sixth of the lateral dimension of the structure.
Compared with the prior art, the utility model has the remarkable progress that:
in the windless state, the guide plate naturally sags; when crosswind blows over the structure, one of the first lateral margin and the second lateral margin of the structure is the windward side (such as the first lateral margin), and the other is the leeward side (such as the second lateral margin), the guide plate rotationally hung at the first lateral margin and the second lateral margin of the structure is blown by the crosswind to swing, the guide plate at the windward side (such as the first lateral margin) swings to the lower surface of the structure, the guide plate at the leeward side (such as the second lateral margin) swings along with the crosswind, thereby the pneumatic shape of the structure is changed, the pneumatic performance of the original vortex generation and shedding of the structure is destroyed, the original vortex generation mechanism of the structure is disturbed, the vortex shedding at the leeward side of the structure can be inhibited, the generation of vortex induced vibration is inhibited, the harm brought by the wind induced vortex is reduced, and the structure safety of the structure is ensured.
Drawings
Fig. 1 is a schematic plan-view development view of a structure vortex-induced vibration suppression device according to an embodiment of the present invention in a windless state.
Fig. 2 is a schematic side view of a structure vortex-induced vibration suppression device according to an embodiment of the present invention in a windless state.
Fig. 3 is a schematic plan view of the structure vortex-induced vibration suppression device according to the embodiment of the present invention in a crosswind state.
Fig. 4 is a schematic structural view of a baffle in the structure vortex-induced vibration suppression device according to the embodiment of the present invention.
Fig. 5 is a schematic structural view of a baffle deflector in the structure vortex-induced vibration suppression device according to the embodiment of the present invention.
Wherein the reference numerals are as follows:
1 Structure
1a first side edge
1b second side edge
2 flow guiding plate
21 flow deflector
211 skeleton
212 cover layer
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 to 5, an embodiment of the structure vortex-induced vibration suppression device of the present invention is shown. The structure vortex-induced vibration suppression device of the embodiment is used for suppressing the vortex-induced vibration of the structure 1, and the structure 1 refers to a long and thin structure which has a large length-width ratio and is easy to generate the vortex-induced vibration under the action of wind load in outdoor facilities, and comprises a long-span bridge, a bridge tower, a guy cable, a main beam, a high-rise building, a long cantilever of a crane and the like. Typically, the structure 1 is suspended in the longitudinal direction and straddles, the structure 1 having a first lateral edge 1a and a second lateral edge 1b which are laterally opposite. In the description of the present invention, the longitudinal direction refers to the left-right direction of the sheet of fig. 1, the lateral direction refers to the up-down direction of the sheet of fig. 1, and the vertical direction refers to the direction perpendicular to the sheet of fig. 1 (i.e., the up-down direction of the sheet of fig. 2).
Referring to fig. 1 and 2, the structure vortex-induced vibration suppression device of the present embodiment includes a plurality of baffles 2 suspended on a structure 1, the plurality of baffles 2 are sequentially arranged in a longitudinal direction at a first side edge 1a and a second side edge 1b of the structure 1, and an upper end of each baffle 2 is hinged to the structure 1 to be rotatable in the longitudinal direction, so that the baffles 2 are rotatably suspended on the structure 1. The hinge structure between the baffle 2 and the structure 1 is not limited, and for example, a pin hinge may be adopted. In the windless state, see fig. 2, the baffle 2 naturally sags under its own weight. When crosswind blows over the structure 1, referring to fig. 3, the crosswind direction is indicated by an arrow a, one of a first side edge 1a and a second side edge 1b of the structure 1 is a windward side (e.g. a first side edge 1a) and the other is a leeward side (e.g. a second side edge 1b), a baffle 2 rotatably suspended at the first side edge 1a and the second side edge 1b of the structure 1 is blown by the crosswind and swings up, the baffle 2 at the windward side (e.g. the first side edge 1a) swings up to the lower surface of the structure 1, the baffle 2 at the leeward side (e.g. the second side edge 1b) swings up along with the crosswind, thereby changing the aerodynamic shape of the structure 1, destroying the aerodynamic performance of the structure 1 for generating and falling, disturbing the original vortex generating mechanism of the structure 1, and being capable of inhibiting the vortex falling off at the leeward side of the structure 1, thereby inhibiting the occurrence of vortex-induced vibration, and reducing the harm caused by the vortex-induced vibration, the structure safety of the structure 1 is guaranteed.
Referring to fig. 1, in the present embodiment, it is preferable that adjacent baffles 2 located at the same side edge have a space therebetween, that is, in the plurality of baffles 2 located at the first side edge 1a, a space is provided between adjacent baffles 2; the plurality of baffles 2 located at the second side edge 1b have a space between adjacent baffles 2. Therefore, the freedom degree of the single guide plate 2 swinging along with cross wind can be ensured, and the guide plates 2 are not interfered with each other.
Referring to fig. 1, in the present embodiment, preferably, a plurality of baffles 2 located at the same side edge are arranged at equal intervals in the longitudinal direction. That is, the plurality of baffles 2 located at the first side edge 1a are arranged at equal intervals in the longitudinal direction; the plurality of baffles 2 at the second side edge 1b are arranged at equal intervals in the longitudinal direction. The guide plates 2 arranged at the same side edge of the structure 1 are uniformly arranged at equal intervals along the longitudinal direction, so that the vortex shedding at the leeward side of the structure 1 is better inhibited.
In this embodiment, the spacing distance between adjacent guide plates 2 may be determined according to the convenience of installation and construction. Preferably, the distance of separation between adjacent baffles 2 at the same side edge does not exceed the vertical dimension of the baffle 2, i.e. the distance of separation between adjacent baffles 2 in the plurality of baffles 2 at the first side edge 1a does not exceed the vertical dimension of the baffle 2; in the plurality of baffles 2 located at the second side edge 1b, the adjacent baffles 2 are spaced apart by a distance not exceeding the vertical dimension of the baffles 2. The vertical dimension of the baffle 2 means the vertical extension dimension of the baffle 2 when the baffle 2 naturally sags, and the dimension is also the length of the baffle 2.
In this embodiment, the plurality of baffles 2 are arranged longitudinally at the first side edge 1a and the second side edge 1b of the structure 1, and preferably cover the longitudinally suspended portion of the structure 1, so as to ensure that the baffles 2 can effectively and sufficiently suppress vortex-induced vibration of the structure 1.
In this embodiment, the baffle 2 is preferably disposed on the lower surfaces of the first side edge 1a and the second side edge 1b, which facilitates the free swing of the baffle 2 along with the cross wind.
Referring to fig. 4, in the present embodiment, preferably, the baffle 2 includes a plurality of baffles 21 connected in series in a vertical direction, and adjacent baffles 21 are hinged to each other, so that adjacent baffles 21 can rotate relatively in a longitudinal direction, thereby forming the baffle 2 into a flexible structure capable of swinging and similar to a fin or a wing of a bird, and more easily swinging with the wind. The hinge structure between the adjacent guide vanes 21 is not limited, and a hinge may be used, for example. The number of baffles 21 included in a single baffle 2 is not limited, and may be determined according to the length of the single baffle 2 and the length of the baffles 21.
Preferably, the guide vanes 21 are rectangular in shape, which facilitates the connection of the guide vanes 21, and the guide plates 2 formed by sequentially connecting the guide vanes 21 in the vertical direction have better structural integrity. The local adjustment of the deflector 21 may be performed for installation, machining and construction, such as adding a chamfer.
Referring to fig. 5, in the present embodiment, preferably, the guide vane 21 includes a skeleton 211 and a cover layer 212, and the cover layer 212 covers the skeleton 211. The frame 211 is made of a material having a certain strength and rigidity, and provides structural strength to the guide vane 21. The cover layer 212 is made of a soft light material (e.g., a soft plastic film, plastic cloth, glass fiber reinforced plastic, etc.), and the cover layer 212 covers the framework 211 to form the sheet-shaped baffle 21. Therefore, the structural weight and the cost of the guide vane 21 can be reduced, the structural weight of the guide vane 2 is also reduced, and the cost is reduced, so that the guide vane 2 is easier to swing and shake along with the wind in the process of floating along with the wind. In addition, the anti-aging master batch can be added into the covering layer 212 to improve the durability of the guide vane 21 in the natural environment and prolong the service life of the guide vane 2.
In this embodiment, the vertical dimension of the baffle 2 (i.e. the length of the baffle 2) is preferably of the same order of magnitude as the lateral dimension of the structure 1. Depending on the available installation space, the vertical dimension of the air deflector 2 can be reduced as appropriate to a fraction of the lateral dimension of the structure 1, preferably the vertical dimension of the air deflector 2 is not less than one sixth of the lateral dimension of the structure 1.
The structure vortex-induced vibration suppression device of the embodiment has low implementation cost and good feasibility and reliability, and can effectively suppress the vortex-induced vibration of the structure 1 through the guide plates 2 only by adding the guide plates 2 to two lateral edges of the structure 1 along the transverse direction without modifying the body structure of the built structure 1; to newly-built structure 1, adopt the structure vortex induced vibration suppression device of this embodiment, just can effectively improve the aerodynamic performance of structure 1 to effectively restrain structure 1 vortex induced vibration, hardly have too much influence to structure 1 overall structure design, the expense of increase is very low, can reduce the construction degree of difficulty and cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The structure vortex-induced vibration suppression device is characterized by comprising a plurality of guide plates (2) hung on the structure (1), wherein the guide plates (2) are sequentially arranged at the first side edge (1a) and the second side edge (1b) in the longitudinal direction, and the upper ends of the guide plates (2) are hinged on the structure (1) in a manner of rotating longitudinally.
2. Structure vortex induced vibration suppression device according to claim 1, characterized in that there is a spacing between adjacent baffles (2) located at the same side edge.
3. Structure vortex induced vibration suppression device according to claim 1, characterized in that a plurality of said baffles (2) located at the same edge are arranged longitudinally at equal intervals.
4. Structure vortex induced vibration suppression device according to claim 2 or 3, characterized in that the separation distance between adjacent baffles (2) at the same side edge does not exceed the vertical dimension of the baffles (2).
5. The structure vortex-induced vibration suppression device according to claim 1, wherein the baffle (2) is provided on the lower surfaces of the first side edge (1a) and the second side edge (1 b).
6. The structure vortex-induced vibration suppression device according to claim 1, characterized in that the guide plate (2) comprises a plurality of guide vanes (21) connected in sequence in the vertical direction, and adjacent guide vanes (21) are hinged with each other.
7. The structure vortex induced vibration suppression device according to claim 6, characterized in that the guide vanes (21) are generally rectangular in shape.
8. The structure vortex induced vibration suppression device according to claim 6, characterized in that the guide vane (21) comprises a skeleton (211) and a cover layer (212) covering the skeleton (211).
9. Structure vortex induced vibration suppression device according to claim 1, characterized in that the vertical dimension of the deflector (2) is of the same order of magnitude as the lateral dimension of the structure (1).
10. Structure vortex induced vibration suppression device according to claim 9, characterized in that the vertical dimension of the deflector (2) is not less than one sixth of the lateral dimension of the structure (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614853.6U CN215519311U (en) | 2021-07-15 | 2021-07-15 | Structure vortex-induced vibration suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614853.6U CN215519311U (en) | 2021-07-15 | 2021-07-15 | Structure vortex-induced vibration suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215519311U true CN215519311U (en) | 2022-01-14 |
Family
ID=79813532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121614853.6U Active CN215519311U (en) | 2021-07-15 | 2021-07-15 | Structure vortex-induced vibration suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215519311U (en) |
-
2021
- 2021-07-15 CN CN202121614853.6U patent/CN215519311U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mannini et al. | VIV–galloping instability of rectangular cylinders: Review and new experiments | |
| Irwin | Bluff body aerodynamics in wind engineering | |
| Larsen et al. | Dynamic wind effects on suspension and cable-stayed bridges | |
| CN107503281B (en) | Vortex generator-based large-span bridge wind-induced vibration flow control method | |
| AU2018414991B2 (en) | Enclosure with frequency mixing and absorbing device on outer surface | |
| McTavish et al. | An investigation of the mechanisms causing large-amplitude wind-induced vibrations in stay cables using unsteady surface pressure measurements | |
| CN109356019A (en) | A kind of Loads of Long-span Bridges method for controlling wind vibration with wind energy collecting function | |
| CN215519311U (en) | Structure vortex-induced vibration suppression device | |
| CN107765722A (en) | Longspan Bridge steel box-girder flutter active air blowing flow control apparatus | |
| CN109322239A (en) | A kind of design method of pipeline suspension crossing structures under wind system | |
| CN109505224A (en) | A kind of design method of pipeline suspension crossing structures under wind system | |
| CN113374111A (en) | Structure vortex-induced vibration suppression device | |
| Yoshimura | Aerodynamic stability of four medium span bridges in Kyushu district | |
| Meyer et al. | Investigation of wind-induced dynamic and aeroelastic effects on variable message signs | |
| Wardlaw | Wind effects on bridges | |
| JP2015158181A (en) | Under-bridge windpower generator and under-bridge windpower generation system | |
| CN112030722A (en) | Method for reducing bridge wind vibration | |
| CN220666561U (en) | Device for inhibiting wind-induced vortex-induced vibration of large-span flexible structure | |
| JPH07139222A (en) | High-rise building | |
| RU177392U1 (en) | DEVICE FOR REDUCING THE OVERVIEW OF BRIDGES OF THE BRIDGE DESIGN CAUSED BY THE WIND | |
| JPH05181541A (en) | Damping device for structure like bridge beam | |
| Spinelli et al. | Super-long-span bridges: wind-resistant design developments and open issues | |
| JPH02243806A (en) | Suspension bridge having damping mechanism | |
| Adhikari | Effect of wind on structure | |
| Borri et al. | The long way from Teddington (1963) to Cambridge (2013) through 50 years of bridge aerodynamics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |