Structural vortex-induced vibration suppression device

Abstract

The present invention relates to the technical field of vortex-induced vibration, and in particular to a device for suppressing vortex-induced vibration of a structure, wherein the structure is suspended in the air along the longitudinal direction, and the structure has a first side edge and a second side edge that are opposite to each other in the transverse direction, and the device for suppressing vortex-induced vibration of the structure comprises a plurality of guide plates suspended on the structure, wherein the plurality of guide plates are arranged in sequence along the longitudinal direction at the first side edge and the second side edge, and the upper ends of the guide plates are hinged to the structure rotatably around the longitudinal direction. When a crosswind blows through the structure, the guide plates rotatably suspended at the first side edge and the second side edge of the structure are blown and swung up by the crosswind, and the guide plates on the leeward side are blown up with the crosswind, thereby changing the aerodynamic shape of the structure, destroying the aerodynamic performance of the original vortex generation and shedding of the structure, disrupting the original vortex generation mechanism of the structure, and being able to suppress the vortex shedding on the leeward side of the structure, thereby suppressing the occurrence of vortex-induced vibration, reducing the harm caused by wind-induced vortex-induced vibration, and ensuring the structural safety of the structure.

Description

Technical Field

[0001] The invention relates to the technical field of vortex-induced vibration, and in particular to a device for suppressing vortex-induced vibration of a structure. Background Art

[0002] In outdoor facilities such as buildings, bridges and engineering construction, there are slender structures with large aspect ratios, such as large-span bridges, bridge towers, cables, main beams, tall buildings, and long cantilevers of cranes. Such structures may experience vortex-induced vibrations at certain wind speeds, which poses a huge hidden danger to the safety of the structures. Vortex-induced vibration is a wind-induced vibration phenomenon that occurs in structures at certain wind speeds. Vortex-induced vibration has a self-excited nature, but the vibrating structure will in turn form a certain feedback effect on the vortex shedding, which limits the amplitude of the vortex vibration. Therefore, vortex-induced resonance is a wind-induced limited amplitude vibration with a self-excited nature.

[0003] The vortex vibration of the structure is not caused by the strong wind, but by the resonance effect caused by the wind load. When the blunt body section is subjected to the action of uniform flow, vortex shedding will form behind the section, thereby generating periodically changing vortex excitation force. If the structure around which the flow is flowing is a vibrating system, the periodic vortex excitation force will cause vortex-induced vibration of the structure, and vortex-induced resonance will occur when the vortex shedding frequency is consistent with the natural vibration period of the structure. It is normal for the structure to shake when encountering special wind conditions, and the shaking will be greater when encountering vortex wind. Under normal circumstances, the amplitude of vortex-induced vibration is small and not easy to detect, and only under special conditions will it produce a larger amplitude.

[0004] From the perspective of fluid, any non-streamlined structure will alternately generate vortices that detach from the surface of the structure on both sides of the structure at a certain constant flow rate. However, vortex-induced vibration is relatively limited in harm to the structure, because when the vibration amplitude of the structure continues to increase, the airflow is affected by the vibration of the structure, and the periodic shedding of the vortex will be destroyed. In layman's terms, vortex-induced vibration and airflow check and balance each other, and the vortex vibration amplitude cannot increase indefinitely, and rarely causes complete damage to the structure. However, the vibration of the structure at a specific wind speed poses a serious hidden danger to the safety of the structure, so there must be methods and means to suppress the vortex-induced vibration of the structure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a device for suppressing vortex-induced vibration of a structure, which can suppress vortex-induced vibration of the structure to overcome the above-mentioned defects of the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a device for suppressing vortex-induced vibration of a structure, wherein the structure is suspended in the longitudinal direction, and the structure has a first side edge and a second side edge opposite to each other in the transverse direction. The device for suppressing vortex-induced vibration of the structure includes a plurality of guide plates suspended on the structure, and the plurality of guide plates are arranged in sequence along the longitudinal direction at the first side edge and the second side edge, and the upper end of the guide plate can be hinged to the structure so as to rotate around the longitudinal direction.

[0007] Preferably, there is a gap between adjacent guide plates located at the same side edge.

[0008] Preferably, the plurality of guide plates located at the same side edge are arranged at equal intervals in the longitudinal direction.

[0009] Preferably, the spacing distance between adjacent guide plates located at the same side edge does not exceed the vertical dimension of the guide plates.

[0010] Preferably, the guide plate is arranged on the lower surface of the first side edge and the second side edge.

[0011] Preferably, the guide plate comprises a plurality of guide vanes which are connected in sequence along the vertical direction, and adjacent guide vanes are hinged.

[0012] Preferably, the guide plate has an overall rectangular shape.

[0013] Preferably, the guide plate comprises a skeleton and a covering layer covering the skeleton.

[0014] Preferably, the vertical dimension of the guide plate is of the same order of magnitude as the lateral dimension of the structure.

[0015] Preferably, the vertical dimension of the guide plate is not less than one sixth of the lateral dimension of the structure.

[0016] Compared with the prior art, the present invention has significant improvements:

[0017] In a windless state, the guide plate naturally droops; when a crosswind blows through the structure, one of the first side edge and the second side edge of the structure is the windward side (such as the first side edge), and the other is the leeward side (such as the second side edge), and the guide plates rotatably suspended at the first side edge and the second side edge of the structure are blown up by the crosswind, and the guide plates on the windward side (such as the first side edge) are swung up to the lower surface of the structure, and the guide plates on the leeward side (such as the second side edge) float with the crosswind, thereby changing the aerodynamic shape of the structure, destroying the original aerodynamic performance of vortex generation and shedding of the structure, disrupting the original vortex generation mechanism of the structure, and being able to suppress vortex shedding on the leeward side of the structure, thereby suppressing the occurrence of vortex-induced vibration, reducing the harm caused by wind-induced vortex-induced vibration, and ensuring the structural safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a top view schematic diagram of the structure vortex-induced vibration suppression device according to an embodiment of the present invention in a windless state.

[0019] Figure 2 It is a side view schematic diagram of the structure vortex-induced vibration suppression device according to an embodiment of the present invention in a windless state.

[0020] Figure 3 It is a schematic top view of the device for suppressing vortex-induced vibration of a structure according to an embodiment of the present invention under a crosswind state.

[0021] Figure 4 It is a schematic structural diagram of a guide plate in a device for suppressing vortex-induced vibration of a structure according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of a guide plate and guide vane in a device for suppressing vortex-induced vibration of a structure according to an embodiment of the present invention.

[0023] The reference numerals are described as follows:

[0024] 1 Structure

[0025] 1a First side edge

[0026] 1b Second side edge

[0027] 2 Deflector

[0028] 21 Guide vane

[0029] 211 Skeleton

[0030] 212 Overlay DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0032] 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", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0035] like Figures 1 to 5 As shown, an embodiment of the device for suppressing vortex-induced vibration of a structure of the present invention. The device for suppressing vortex-induced vibration of a structure of the present embodiment is used to suppress vortex-induced vibration of a structure 1, wherein the structure 1 refers to an elongated structure with a large aspect ratio in outdoor facilities that is prone to vortex-induced vibration under the action of wind loads, including large-span bridges, bridge towers, cables, main beams, tall buildings, long cantilevers of cranes, etc. Usually, the structure 1 is suspended in the longitudinal direction, and the structure 1 has a first side edge 1a and a second side edge 1b that are opposite to each other in the transverse direction. In the description of the present invention, the longitudinal direction refers to Figure 1 The horizontal direction of the paper is Figure 1 The vertical direction is perpendicular to the paper. Figure 1 The direction of the paper (i.e. Figure 2 up and down direction of the paper).

[0036] See also Figure 1 and Figure 2 The structure vortex-induced vibration suppression device of this embodiment includes a plurality of guide plates 2 suspended on the structure 1. The plurality of guide plates 2 are arranged in sequence along the longitudinal direction at the first side edge 1a and the second side edge 1b of the structure 1. The upper ends of the guide plates 2 are hinged to the structure 1 rotatably around the longitudinal direction, so that the guide plates 2 can be rotatably suspended on the structure 1. The hinge structure between the guide plates 2 and the structure 1 is not limited, for example, a pin hinge can be used. In the windless state, see Figure 2 , the guide plate 2 naturally droops under its own gravity. When there is a crosswind blowing through the structure 1, see Figure 3, the crosswind direction is indicated by arrow A, one of the first side edge 1a and the second side edge 1b of the structure 1 is the windward side (such as the first side edge 1a), and the other is the leeward side (such as the second side edge 1b), the guide plate 2 rotatably suspended at the first side edge 1a and the second side edge 1b of the structure 1 is blown and swung by the crosswind, the guide plate 2 on the windward side (such as the first side edge 1a) is swung to the lower surface of the structure 1, and the guide plate 2 on the leeward side (such as the second side edge 1b) is floated with the crosswind, thereby changing the aerodynamic shape of the structure 1, destroying the original aerodynamic performance of vortex generation and shedding of the structure 1, disrupting the original vortex generation mechanism of the structure 1, and being able to suppress vortex shedding on the leeward side of the structure 1, thereby suppressing the occurrence of vortex-induced vibration, reducing the harm caused by wind-induced vortex-induced vibration, and ensuring the structural safety of the structure 1.

[0037] See also Figure 1 In this embodiment, preferably, there is a gap between adjacent guide plates 2 located at the same side edge, that is, among the multiple guide plates 2 located at the first side edge 1a, there is a gap between adjacent guide plates 2; among the multiple guide plates 2 located at the second side edge 1b, there is a gap between adjacent guide plates 2. In this way, the freedom of movement of a single guide plate 2 to swing with the crosswind can be guaranteed, so that the guide plates 2 do not interfere with each other.

[0038] See also Figure 1 In this embodiment, preferably, the multiple guide plates 2 located at the same side edge are arranged at equal intervals in the longitudinal direction. That is, the multiple guide plates 2 located at the first side edge 1a are arranged at equal intervals in the longitudinal direction; the multiple guide plates 2 located at the second side edge 1b are arranged at equal intervals in the longitudinal direction. Arranging the multiple guide plates 2 located at the same side edge of the structure 1 at equal intervals in the longitudinal direction is conducive to better suppressing vortex shedding on the leeward side of the structure 1.

[0039] In this embodiment, the spacing distance between adjacent guide plates 2 can be determined according to the convenience of installation and construction. Preferably, the spacing distance between adjacent guide plates 2 located at the same side edge does not exceed the vertical dimension of the guide plate 2, that is, among the multiple guide plates 2 located at the first side edge 1a, the spacing distance between adjacent guide plates 2 does not exceed the vertical dimension of the guide plate 2; among the multiple guide plates 2 located at the second side edge 1b, the spacing distance between adjacent guide plates 2 does not exceed the vertical dimension of the guide plate 2. The vertical dimension of the guide plate 2 refers to the extension dimension of the guide plate 2 in the vertical direction when the guide plate 2 is naturally drooping, and this dimension is also the length of the guide plate 2.

[0040] In this embodiment, the plurality of guide plates 2 are preferably arranged longitudinally at the first side edge 1a and the second side edge 1b of the structure 1 to cover the longitudinally suspended portion of the structure 1 to ensure that the guide plates 2 can effectively and fully suppress the vortex-induced vibration of the structure 1.

[0041] In this embodiment, preferably, the guide plate 2 is arranged on the lower surface of the first side edge 1a and the second side edge 1b, which is conducive to the free swinging of the guide plate 2 with the cross wind.

[0042] See also Figure 4 In this embodiment, preferably, the guide plate 2 includes a plurality of guide vanes 21 connected in sequence along the vertical direction, and the adjacent guide vanes 21 are hinged so that the adjacent guide vanes 21 can rotate relative to each other in the longitudinal direction, thereby forming the guide plate 2 into a swingable flexible structure similar to a fish fin or a bird's wing, which is more likely to swing with the wind. The hinge structure between adjacent guide vanes 21 is not limited, for example, a hinge can be used. The number of guide vanes 21 included in a single guide plate 2 is not limited, and can be determined according to the required length of the single guide plate 2 and the length of the guide vanes 21.

[0043] Preferably, the guide vanes 21 are rectangular in shape as a whole, which facilitates the interconnection of the guide vanes 21 and enables the guide plate 2 formed by connecting a plurality of guide vanes 21 in sequence vertically to have good structural integrity. For the needs of installation, processing and construction, the guide vanes 21 can be partially adjusted, such as adding chamfers.

[0044] See also Figure 5 In this embodiment, preferably, the guide plate 21 includes a skeleton 211 and a covering layer 212, and the covering layer 212 covers the skeleton 211. The skeleton 211 is made of a material with a certain strength and rigidity to provide structural strength for the guide plate 21. The covering layer 212 is made of a softer lightweight material (such as a soft plastic film, a plastic cloth, a fiberglass reinforced plastic, etc.), and the covering layer 212 covers the skeleton 211 to form a sheet-like guide plate 21. In this way, the structural weight and cost of the guide plate 21 can be reduced, and the structural weight of the guide plate 2 is also reduced. While reducing the cost, the guide plate 2 is easier to sway and shake with the wind when it floats with the wind. In addition, the durability of the guide plate 21 in the natural environment can be improved by adding an anti-aging functional masterbatch to the covering layer 212, thereby increasing the service life of the guide plate 2.

[0045] In this embodiment, preferably, the vertical dimension of the guide plate 2 (i.e., the length of the guide plate 2) is 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 guide plate 2 can be shortened to a fraction of the lateral dimension of the structure 1 as appropriate. Preferably, the vertical dimension of the guide plate 2 is not less than one sixth of the lateral dimension of the structure 1.

[0046] The device for suppressing the vortex-induced vibration of a structure of the present embodiment has low implementation cost and good feasibility and reliability, and there is no need to modify the main structure of the already constructed structure 1. The guide plates 2 only need to be added to the two opposite edges of the structure 1 in the transverse direction, so that the vortex-induced vibration of the structure 1 can be effectively suppressed by the guide plates 2. For a newly built structure 1, the device for suppressing the vortex-induced vibration of a structure of the present embodiment can be used to effectively improve the aerodynamic performance of the structure 1, thereby effectively suppressing the vortex-induced vibration of the structure 1, with almost no impact on the overall structural design of the structure 1, and the additional cost is very low, which can reduce the difficulty and cost of construction.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A device for suppressing vortex-induced vibration of a structure, wherein the structure (1) is suspended in the air in a longitudinal direction, and the structure (1) has a first side edge (1a) and a second side edge (1b) opposite to each other in a transverse direction, characterized in that: The structure vortex-induced vibration suppression device comprises a plurality of guide plates (2) suspended on the structure (1), wherein the plurality of guide plates (2) are arranged in sequence along the longitudinal direction at the first side edge (1a) and the second side edge (1b), and the upper ends of the guide plates (2) are hingedly connected to the structure (1) rotatably around the longitudinal direction; when a crosswind blows through the structure (1), one of the first side edge (1a) and the second side edge (1b) of the structure (1) is the windward side, and the other is the leeward side, and the guide plates (2) rotatably suspended at the first side edge (1a) and the second side edge (1b) of the structure (1) are blown up by the crosswind, and the guide plates (2) on the windward side are swung up to the lower surface of the structure (1), and the guide plates (2) on the leeward side are blown up by the crosswind.

2. The device for suppressing vortex-induced vibration of a structure according to claim 1, characterized in that: There is a gap between adjacent guide plates (2) located at the same side edge.

3. The structure vortex-induced vibration suppression device according to claim 1, characterized in that: The plurality of guide plates (2) located at the same side edge are arranged at equal intervals in the longitudinal direction.

4. The structure vortex-induced vibration suppression device according to claim 2 or 3, characterized in that: The spacing distance between adjacent guide plates (2) located at the same side edge does not exceed the vertical dimension of the guide plates (2).

5. The structure vortex-induced vibration suppression device according to claim 1, characterized in that: The guide plate (2) is arranged on the lower surface of the first side edge (1a) and the second side edge (1b).

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) which are connected in sequence along the vertical direction, and adjacent guide vanes (21) are hingedly connected.

7. The device for suppressing vortex-induced vibration of a structure according to claim 6, characterized in that: The guide plate (21) has an overall rectangular shape.

8. The device for suppressing vortex-induced vibration of a structure according to claim 6, characterized in that: The guide plate (21) comprises a skeleton (211) and a covering layer (212) covering the skeleton (211).

9. The structure vortex-induced vibration suppression device according to claim 1, characterized in that: The vertical dimension of the guide plate (2) is of the same order of magnitude as the lateral dimension of the structure (1).

10. The device for suppressing vortex-induced vibration of a structure according to claim 9, characterized in that: The vertical dimension of the guide plate (2) is not less than one sixth of the transverse dimension of the structure (1).

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