Pneumatic structure for inhibiting vortex vibration of water delivery pipeline bridge

Abstract

According to the pneumatic structure for restraining vortex-induced vibration of the water conveying pipeline bridge, the turbulent flow device is arranged on the edge of the bridge floor, and the flow guiding device is arranged on the side face of the main beam, so that the flow field characteristic of the main beam of the water conveying pipeline bridge in the thickness direction is changed, large vortexes are avoided, vortex-induced vibration of the main beam is restrained, and the service life of the main beam is prolonged. And the service life of the bridge is prolonged.

Description

Technical Field

[0001] The utility model relates to the fields of bridge engineering and disaster prevention engineering, and particularly relates to an aerodynamic structure for suppressing the vortex-induced vibration of a water conveyance pipeline bridge. Background Art

[0002] As an important water conservancy project facility, the water conveyance pipeline bridge realizes the cross-regional conveyance of water resources and is widely used in the water conservancy project transportation in China.

[0003] The water conveyance pipeline bridge generally belongs to a narrow bridge according to its structural characteristics and is a flexible structure, which is easily affected by wind. In particular, the water conveyance pipe supported above the main beam section will blunt the aerodynamic shape of the main beam section, resulting in more obvious and complex shedding of vortices in the flow around the main beam surface under wind load. In the early years, the span of the water conveyance pipeline bridge was small, the influence of air flow on the bridge was not significant, and the requirement for the wind resistance stability of the bridge was not high. Therefore, there was less research on the aerodynamic measures for the vortex-induced vibration of the water conveyance pipeline bridge, resulting in rare optimization of the aerodynamic structure for suppressing the vortex-induced vibration of the water conveyance pipeline bridge, especially for large-span water conveyance pipeline bridges, in the prior art. With the increase of the span of the water conveyance pipeline bridge nowadays, the influence of air flow on the bridge becomes more significant. In particular, the vortex-induced vibration response of large-span water conveyance pipeline bridges is also more significant. Large-amplitude vortex-induced vibration will accelerate the fatigue of bridge components and thus affect the operation safety of the bridge. Therefore, it is of great significance to design an effective aerodynamic structure to control the amplitude of the vortex-induced vibration of the bridge. Summary of the Utility Model

[0004] The utility model provides an aerodynamic structure for suppressing the vortex-induced vibration of a water conveyance pipeline bridge, which optimizes the problem that the vortex-induced vibration suppression structure in the prior art has weak pertinence to the water conveyance pipeline bridge and cannot effectively suppress the vortex-induced vibration of large-span water conveyance pipeline bridges, and can optimize the vortex-induced vibration response characteristics of the water conveyance pipeline bridge.

[0005] To achieve the above object, the utility model provides an aerodynamic structure for suppressing the vortex-induced vibration of a water conveyance pipeline bridge. The water conveyance pipeline bridge includes a main beam, and the main beam includes a bridge deck and two side surfaces connected to the bridge deck. The aerodynamic structure for suppressing the vortex-induced vibration of the water conveyance pipeline bridge includes:

[0006] A flow disturbing device, the flow disturbing device includes a flow disturbing plate, the flow disturbing plate is arranged at the edge of the bridge deck along the width direction of the main beam, the flow disturbing plate is arranged along the length direction of the main beam, and the flow disturbing plate inclines from the edge of the bridge deck to the center of the bridge deck along the normal direction of the bridge deck;

[0007] The flow guide device includes a first flow guide portion and a second flow guide portion, wherein the first flow guide portion is arranged on the side surface, the first flow guide portion extends along the width direction of the main beam, and the second flow guide portion is connected to the first flow guide portion and extends along the normal direction of the bridge deck. The flow spoiler and the flow guide device fundamentally change the flow field characteristics of the upper and lower sides of the water pipeline bridge, avoid the generation of large vortices, and thus suppress the vortex-induced vibration of the main beam.

[0008] As an optional implementation, the number of the spoiler devices is two, and the two spoiler devices are located on both sides of the bridge deck along the width direction of the main beam; and / or

[0009] The number of the guide devices is two, and the two guide devices are located on both sides of the main beam along the width direction of the main beam. The spoiler device and / or the guide device are arranged on both sides of the water pipeline bridge, so that the water pipeline bridge can play a role in suppressing vortex-induced vibration when facing different wind directions.

[0010] As an optional embodiment, the spoiler device further comprises a support plate, the support plate is arranged perpendicular to the bridge deck, and one side of the support plate is connected to the side of the spoiler away from the bridge deck. The support plate supports the spoiler to prevent the angle between the spoiler and the bridge deck from changing, thereby improving the stability of the spoiler performance.

[0011] As an optional embodiment, the spoiler device further comprises a mounting plate, the mounting plate is laid on the bridge deck, one side of the mounting plate is connected to the side of the spoiler facing the bridge deck, and the other side of the mounting plate is connected to the support plate. The mounting plate increases the contact area between the spoiler device and the bridge deck, provides more space for the installation of the spoiler device on the bridge deck, and is conducive to improving the stability of the installation of the spoiler device on the bridge deck.

[0012] As an optional implementation, one end of the first guide portion facing away from the main beam is connected to one end of the second guide portion facing away from the bridge deck, and the thickness direction of the first guide portion is perpendicular to the thickness direction of the second guide portion.

[0013] As an optional implementation, the spoiler device and / or the guide device are / is arranged along the length direction of the main beam.

[0014] As an optional implementation, the angle between the spoiler and the bridge deck is 45°-80°.

[0015] As an optional implementation, the length of the projection of the spoiler on the plane where the bridge deck is located along the width direction of the main beam is 0.08-0.10 times the width of the main beam.

[0016] As an alternative embodiment, the width of the first flow guiding portion in the width direction of the main beam is 0.08 - 0.12 times the width of the main beam.

[0017] As an alternative embodiment, the width of the second flow guiding portion in the thickness direction of the main beam is 0.6 - 0.9 times the thickness of the main beam.

[0018] One or more technical solutions provided by the present utility model have at least the following technical effects or advantages:

[0019] The present utility model provides a pneumatic structure for suppressing the vortex-induced vibration of a water conveyance pipeline bridge. By arranging a flow disturbing device at the edge of the bridge deck and a flow guiding device on the side surface of the main beam, the flow field characteristics of the main beam of the water conveyance pipeline bridge in the thickness direction are changed, the generation of large vortices is avoided, thereby suppressing the vortex-induced vibration of the main beam, which is beneficial to extending the service life of the bridge. Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, and constitute a part of the present utility model, but do not limit the embodiments of the present utility model;

[0021] Figure 1 It is a cross-sectional view of the water conveyance pipeline bridge along the length direction in the present utility model;

[0022] Figure 2 It is a comparison diagram of the vertical vortex-induced vibration amplitudes of the main beam at a +5° angle of attack before and after the installation of the flow disturbing device and the flow guiding device.

[0023] Description of the Reference Numerals

[0024] Main beam - 100; Bridge deck - 101; Side surface - 102;

[0025] Flow disturbing device - 1; Flow disturbing plate - 11; Support plate - 12; Mounting plate - 13;

[0026] Flow guiding device - 2; First flow guiding portion - 21; Second flow guiding portion - 22;

[0027] Width direction of the main beam - X; Thickness direction of the main beam - Y. Detailed Embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0030] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.

[0031] In addition, terms such as "installation", "setting", "provided with", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In addition, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] Embodiment 1:

[0034] Please refer to Figure 1 and Figure 2 , the present utility model provides a pneumatic structure for suppressing the vortex-induced vibration of a water conveyance pipeline bridge. The water conveyance pipeline bridge includes a main beam 100. The main beam 100 includes a bridge deck 101 and two side surfaces 102 connected to the bridge deck 101. The pneumatic structure for suppressing the vortex-induced vibration of the water conveyance pipeline bridge includes:

[0035] A flow disturbing device 1 and a flow guiding device 2. The flow disturbing device 1 includes a flow disturbing plate 11. The flow disturbing plate 11 is arranged at the edge of the bridge deck 101 along the width direction of the main beam 100. The flow disturbing plate 11 is arranged along the length direction of the main beam 100. The flow disturbing plate 11 inclines from the edge of the bridge deck 101 towards the center of the bridge deck 101 along the normal direction of the bridge deck 101. The flow guiding device 2 includes a first flow guiding part 21 and a second flow guiding part 22. The first flow guiding part 21 is arranged on the side surface 102. The first flow guiding part 21 extends along the width direction of the main beam 100. The second flow guiding part 22 is connected to the first flow guiding part 21 and extends along the normal direction of the bridge deck 101. Wherein, the normal direction of the bridge deck 101 refers to the upward side in the thickness direction of the main beam 100. The flow disturbing device 1 and the flow guiding device 2 fundamentally change the flow field characteristics of the upper part and the lower side of the water conveyance pipeline bridge, avoid the generation of large vortices, and thus suppress the vortex-induced vibration of the main beam 100.

[0036] Embodiment 2:

[0037] An aerodynamic structure for suppressing vortex vibration of a water pipeline bridge. Based on the first embodiment, the number of spoiler devices 1 is two, and the two spoiler devices 1 are located on both sides of the bridge deck 101 along the width direction of the main beam 100; and / or

[0038] There are two flow guide devices 2, which are located on both sides of the main beam 100 along the width direction of the main beam 100. The flow spoiler 1 and the flow guide device 2 are arranged on both sides of the water pipeline bridge, so that the water pipeline bridge can play a role in suppressing vortex-induced vibration when facing different wind directions.

[0039] Exemplarily, a plane is defined, the width direction of the main beam 100 is the normal vector of the plane and the midpoint of the width of the main beam 100 is on the plane, the number of spoiler devices 1 and the number of guide devices 2 are both two, the two spoiler devices 1 are symmetrically arranged relative to the plane, and the two guide devices 2 are symmetrically arranged relative to the plane.

[0040] Optionally, the spoiler 1 further comprises a support plate 12, which is arranged perpendicular to the bridge deck 101, and one side of the support plate 12 is connected to the side of the spoiler 11 away from the bridge deck 101. The support plate 12 supports the spoiler 11, prevents the angle between the spoiler 11 and the bridge deck 101 from changing, and thus improves the stability of the performance of the spoiler 11.

[0041] Optionally, the spoiler 1 further comprises a mounting plate 13, which is laid on the bridge deck 101, one side of the mounting plate 13 is connected to the side of the spoiler 11 facing the bridge deck 101, and the other side of the mounting plate 13 is connected to the support plate 12. The mounting plate 13 increases the contact area between the spoiler 1 and the bridge deck 101, provides more space for the spoiler 1 to be installed on the bridge deck 101, and is conducive to improving the stability of the spoiler 1 installed on the bridge deck 101. Exemplarily, the connection between the mounting plate 13 and the bridge deck 101 can be bolted, welded, etc. The connection between the spoiler 11, the support plate 12 and the mounting plate 13 can be a connection formed by hinged, welded or integrally formed, and multiple connection methods can be used in combination, which is not limited in this embodiment.

[0042] Preferably, the spoiler 11, the support plate 12 and the mounting plate 13 enclose a cavity, and the cavity is closed at both ends along the length direction of the main beam 100. The closure of both ends is conducive to preventing debris such as water, dust or plant seeds from entering the cavity and causing erosion to the spoiler 1, which is conducive to extending the life of the spoiler 1. Exemplarily, the way to close the two ends of the cavity along the length direction of the main beam 100 can be to weld plates separately, fill with concrete, etc.

[0043] Optionally, one end of the first flow guiding part 21 facing away from the main beam 100 is connected to one end of the second flow guiding part 22 away from the bridge deck 101, and the thickness direction of the first flow guiding part 21 is perpendicular to the thickness direction of the second flow guiding part 22.

[0044] Optionally, the spoiler device 1 and / or the flow guiding device 2 are arranged along the entire length of the main beam 100 in the length direction of the main beam 100.

[0045] Optionally, the included angle between the spoiler 11 and the bridge deck 101 is 45° - 80°.

[0046] Optionally, the length of the projection of the spoiler 11 on the plane where the bridge deck 101 is located in the width direction of the main beam 100 is 0.08 - 0.10 times the width of the main beam 100.

[0047] Optionally, the width of the first flow guiding part 21 in the width direction of the main beam 100 is 0.08 - 0.12 times the width of the main beam 100.

[0048] Optionally, the width of the second flow guiding part 22 in the thickness direction of the main beam 100 is 0.6 - 0.9 times the thickness of the beam.

[0049] Please refer to Figure 2 , for example, the width of the main beam 100 of the water conveyance pipeline bridge is 5.8 m, and the thickness of the main beam 100 is 1.5 m. The width of the first flow guiding part 21 in the width direction of the main beam 100 is 0.5 m, the width of the second flow guiding part 22 in the thickness direction of the main beam 100 is 1.1 m, the length of the projection of the spoiler 11 on the plane where the bridge deck 101 is located in the width direction of the main beam 100 is 0.6 m, the included angle between the spoiler 11 and the bridge deck 101 is 45°, the spoiler device 1 and the flow guiding device 2 are arranged along the entire length of the main beam 100 in the length direction of the main beam 100. Before and after the spoiler device 1 and the flow guiding device 2 are arranged, the comparison of the vertical vortex-induced vibration amplitudes of the main beam 100 at a +5° angle of attack is as Figure 2 shown. It can be seen that the spoiler device 1 and the flow guiding device 2 can effectively reduce the vertical amplitude of vortex-induced vibration and suppress the occurrence of vortex-induced vibration response.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline bridge. The water conveyance pipeline bridge includes a main beam, and the main beam includes a bridge deck and two side surfaces connected to the bridge deck. It is characterized in that, The aerodynamic structure for suppressing vortex vibration of a water pipeline bridge comprises: A spoiler device, the spoiler device comprising a spoiler, the spoiler is arranged at the edge of the bridge deck along the width direction of the main beam, the spoiler is arranged along the length direction of the main beam, and the spoiler is inclined from the edge of the bridge deck to the center of the bridge deck along the normal direction of the bridge deck; The flow guide device includes a first flow guide portion and a second flow guide portion, wherein the first flow guide portion is arranged on the side surface, the first flow guide portion extends along the width direction of the main beam, and the second flow guide portion is connected to the first flow guide portion and extends along the normal direction of the bridge deck.

2. The aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to claim 1, wherein The number of the spoilers is two, and the two spoilers are located on both sides of the bridge deck along the width direction of the main beam; and / or The number of the guide devices is two, and the two guide devices are located on both sides of the main beam along the width direction of the main beam.

3. The aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to claim 1, wherein The spoiler device also includes a support plate, which is arranged perpendicular to the bridge deck, and one side of the support plate is connected to a side of the spoiler facing away from the bridge deck.

4. The aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to claim 3, characterized in that, The spoiler device also includes a mounting plate, which is laid on the bridge deck, one side of the mounting plate is connected to the side of the spoiler facing the bridge deck, and the other side of the mounting plate is connected to the support plate.

5. The aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to claim 1, wherein One end of the first guide portion facing away from the main beam is connected to one end of the second guide portion facing away from the bridge deck, and the thickness direction of the first guide portion is perpendicular to the thickness direction of the second guide portion.

6. The aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to claim 1, characterized in that, The spoiler device and / or the flow guide device are / is arranged along the length direction of the main beam.

7. An aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to any one of claims 1-6, characterized in that, The included angle between the spoiler and the bridge deck is 45°-80°.

8. An aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to any one of claims 1-6, characterized in that, The length of the projection of the spoiler on the plane where the bridge deck is located along the width direction of the main beam is 0.08-0.10 times the width of the main beam.

9. An aerodynamic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to any one of claims 1-6, characterized in that, The width of the first guide portion along the width direction of the main beam is 0.08-0.12 times the width of the main beam.

10. A pneumatic structure for suppressing the bridge vortex-induced vibration of a water conveyance pipeline according to any one of claims 1-6, characterized in that, The width of the second guide portion along the thickness direction of the main beam is 0.6-0.9 times the thickness of the main beam.

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