CN217869987U - Vibration reduction system of stay cable and stay cable bridge structure - Google Patents

Abstract

The utility model discloses a vibration reduction system of a stay cable and a stay cable bridge structure, which relate to the technical field of bridge vibration reduction, and the device comprises an in-plane damper which is used for being assembled on the bridge surface of a stay cable bridge; an out-of-plane damper for being disposed on the deck in a transverse bridge direction; a link transmission assembly configured to: when the stay cable is subjected to in-plane vibration, the connecting rod drives the swinging rod to reciprocate along the axial direction of the swinging rod so as to enable the two ends of the in-plane damper to move relatively to generate damping, and when the stay cable is subjected to out-of-plane vibration, the connecting rod drives the swinging rod to reciprocate in the transverse bridge direction so as to enable the two ends of the out-of-plane damper to move relatively to generate damping. When the damping system makes the stay cable generate out-of-plane vibration as the out-of-plane damper through the damper arranged along the transverse bridge, the stress structure of the out-of-plane damper is more reasonable, the stress is prevented from being concentrated on the end part of the connecting part, the displacement transmission efficiency is higher, and the out-of-plane damping effect is more excellent.

Description

Vibration reduction system of stay cable and stay cable bridge structure

Technical Field

The utility model relates to a bridge damping technical field, concretely relates to damping system and suspension cable bridge structures of suspension cable.

Background

The cable-stayed bridge is used as a bridge system widely adopted by modern traffic engineering, the span of the cable-stayed bridge is larger and larger along with the continuous improvement of the bridge construction level, the length-diameter ratio of the stay cable is also larger and larger, and the cable-stayed bridge is easy to vibrate under the external excitation of wind, rain and the like due to the characteristics of low damping, large flexibility and light weight of the stay cable.

At present, the construction often adopts a mode of additionally arranging an external damper near the beam end of the stay cable, and the vibration of the stay cable is inhibited by improving the additional damping of the stay cable. In general, the stay cable vibrates mainly in an in-plane vibration direction perpendicular to the wind direction. However, in a special wind environment, when the wind direction is parallel to the bridge axis, the stay cable also exhibits out-of-plane dominant vibrations. The stay cable damper in the related art focuses more on the control of the in-plane vibration of the stay cable, and neglects the out-of-plane vibration of the stay cable which rarely occurs. And when the stay cable takes place off-plane vibration, the attenuator will unable effective control cable's vibration, can cause the tired of stay cable and the destruction of inoxidizing coating, and the vibration that lasts can cause attenuator self to damage even, leads to the attenuator to become invalid, influences structure safety. Therefore, how to effectively control out-of-plane vibration of the stay cable becomes a difficult problem to be solved by practitioners.

SUMMERY OF THE UTILITY MODEL

The device aims at the problem that the stay cable damper in the prior art cannot effectively control the in-plane vibration and the out-of-plane vibration of the stay cable at the same time. The utility model provides a damping system of suspension cable, it includes:

the in-plane damper is used for being assembled on the bridge floor of the cable-stayed bridge;

an out-of-plane damper for placement on the deck in a cross-bridge direction;

the connecting rod transmission assembly comprises a connecting rod and a swinging rod, one end of the connecting rod is used for being connected with the stay cable, the other end of the connecting rod is connected with the front end of the swinging rod, and the swinging rod is connected with the in-plane damper and the out-of-plane damper;

the link transmission assembly is configured to: when the stay cable vibrates in the plane, the connecting rod drives the swinging rod to reciprocate along the axis direction of the swinging rod so that the two ends of the in-plane damper move relatively to generate damping, and when the stay cable vibrates out of the plane, the connecting rod drives the swinging rod to reciprocate in the transverse bridge direction so that the two ends of the out-of-plane damper move relatively to generate damping.

In some embodiments, the link transmission assembly further comprises a first transmission portion comprising:

the support is used for being assembled on the bridge deck;

one end of the first connecting rod is connected with the swinging rod, and the other end of the first connecting rod is connected with the support through a second pin shaft; wherein the content of the first and second substances,

when the stay cable generates in-plane vibration, the first connecting rod can swing back and forth around the second pin shaft to drive the swing rod to move back and forth along the axis direction of the swing rod.

In some embodiments, the swing lever is connected to the first link by a first pin; wherein the content of the first and second substances,

when the stay cable generates out-of-plane vibration, the swinging rod can drive the two ends of the out-of-plane damper to move relatively by swinging around the first pin shaft in a reciprocating mode.

In some embodiments, the support is provided with two lug plates arranged at intervals, and one end of the oscillating rod penetrates between the two lug plates and is connected with the two lug plates through the second pin shaft.

In some embodiments, the vibration reduction system further comprises a guard box assembled to the distal end of the swing lever, and the in-plane damper is connected to the swing lever through the guard box.

In some embodiments, one end of the out-of-plane damper is assembled to the support and the other end is connected to the protective box.

In some embodiments, the distal end of the sway bar is connected coaxially with the end of the in-plane damper and the sway bar is connected non-coaxially with the end of the out-of-plane damper.

In some embodiments, the out-of-plane damper and the in-plane damper are each eddy current dampers.

In some embodiments, the out-of-plane damper and the in-plane damper are both ball screw eddy current dampers.

On the other hand, this application provides a suspension cable bridge structures, it includes: the vibration dampening system of any one of the above.

Compared with the prior art, the utility model has the advantages of:

(1) The utility model provides a when the damping system makes the stay cable take place the off-plate vibration as the off-plate attenuator to the attenuator that sets up through following the cross bridge, the atress structure of off-plate attenuator is more reasonable, has avoided the atress to concentrate on connecting portion tip, and displacement transmission efficiency is higher, and off-plate damping effect is more excellent.

(2) The inventor adopts the electric eddy current damper to replace a conventional damper in the application, and the electric eddy current damper is not influenced by temperature change, so that the vibration reduction system can adapt to the great change of the environmental temperature.

(3) The eddy current damper in the utility model adopts a ball screw type, compared with a gear rack disc type eddy current damper, the ball screw transmission has the advantages of high transmission efficiency, small initial friction, stable work and the like, and the assembly is more easily controlled except the advantages of the axial damper; compared with a friction damper, the damper is sensitive to the tiny vibration of the stay cable, has a good control effect on the tiny vibration, and besides the advantage of an axial damper, the rotating part of the ball screw type eddy current damper has inertia property and vibration reduction efficiency is higher.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an elevation view of a damping system in an embodiment of the present invention.

In the figure: 1. a connecting rod transmission component; 11. a connecting rod; 12. a swing lever; 2. an in-plane damper; 3. a first transmission unit; 31. a support; 311. an ear plate; 32. a first link; 33. a first pin shaft; 34. a second pin shaft; 35. a protective box; 4. an out-of-plane damper; 5. a stay cable; 6. a base; 7. a cable clamp; 8. a connecting seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the protection scope of the present application.

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. In order to solve among the relevant art damping system and be difficult to the vibration of effective control suspension cable in-plane off-plate, this application provides a damping system of suspension cable, and it includes: the device comprises a connecting rod transmission component 1, an in-plane damper 2 and an out-of-plane damper 4; wherein the content of the first and second substances,

the in-plane damper 2 is used for being assembled on the bridge surface of a cable-stayed bridge, and two ends of the in-plane damper 2 can generate damping through relative movement;

the out-of-plane damper 4 is arranged on the bridge floor along a transverse bridge direction, and two ends of the in-plane damper 2 can generate damping through relative movement;

the connecting rod transmission assembly 1 comprises a connecting rod 11 and a swinging rod 12, and the swinging rod 12 is connected with the in-plane damper 2 and the out-of-plane damper 4; wherein the link transmission assembly 1 is configured to: after the stay cable 5 vibrates in the plane, the connecting rod 11 drives the oscillating rod 12 to reciprocate along the axial direction of the stay cable so that the two ends of the in-plane damper 2 move relatively to generate damping, and after the stay cable 5 vibrates out of the plane, the connecting rod 11 drives the oscillating rod 12 to reciprocate in the transverse bridge direction so that the two ends of the out-of-plane damper 4 move relatively to generate damping.

Preferably, the distal end of the sway bar 12 is connected coaxially with the end of the in-plane damper 2, and the sway bar 12 is connected non-coaxially with the end of the out-of-plane damper 4. The connecting rod 11 drives the oscillating rod 12 to reciprocate in the axial direction to move the two ends of the in-plane damper 2 relatively to generate damping.

It is worth explaining that this application is through setting up horizontal bridge to the off-plane attenuator 4 of arranging to transmit 4 tip of off-plane attenuator with off-plane vibration through connecting rod drive assembly 1, the atress structure is more reasonable, has avoided the atress to concentrate on connecting rod drive assembly 1 tip, and displacement transmission efficiency is higher, and off-plane damping effect is more excellent.

Preferably, the in-plane damper 2 and the out-of-plane damper 4 both use eddy current dampers which are not affected by temperature changes, so that the vibration damping system can adapt to the great changes of the environmental temperature. Eddy current dampers can help the damping system to adapt to relatively harsh environments.

In some embodiments, the vibration damping system for a stay cable further comprises: the connecting rod transmission assembly 1 further comprises: a first transmission part 3, the first transmission part 3 including:

a support 31 for being assembled on the deck;

one end of the first connecting rod 32 is connected with the swinging rod 12, and the other end of the first connecting rod 32 is connected with the support 31 through a second pin shaft 34; wherein the content of the first and second substances,

when the stay cable 5 undergoes the in-plane vibration, the first link 32 can drive the oscillating rod 12 to reciprocate along the axial direction thereof by oscillating back and forth around the second pin 34.

Further, as shown in fig. 1, the swing lever 12 is connected to the first link 32 by a first pin 33; wherein the content of the first and second substances,

when the stay cable 5 vibrates out of plane, the swing rod 12 can drive the two ends of the out-of-plane damper 4 to move relatively to generate damping by swinging back and forth around the first pin 33.

In some specific embodiments, two lug plates 311 are disposed on the support 31 at an interval, one end of the first link 32 is connected to the link transmission assembly 1 through a first pin 33, and the other end of the first link passes through between the two lug plates 311 and is connected to the lug plates 311 through a second pin 34.

In other specific embodiments, the vibration damping system further includes a protective box 35, the protective box 35 is assembled at the end of the link transmission assembly 1, and the in-plane damper 2 is connected to the link transmission assembly 1 through the protective box 35.

Preferably, as shown in fig. 1, the in-plane dampers 2 are held against both sides of the shield box 35. One end of the out-of-plane damper 4 is assembled on the support 31, and the other end is connected with the protective box 35.

It is worth mentioning that the mounting position of the out-of-plane damper 4 is not unique, but requires a transverse bridge arrangement and ensures that it can receive vibrations in the out-of-plane direction.

It is understood that the damping system further comprises: and the base 6 is arranged on the bridge floor, and the base 6 is connected with the in-plane damper 2 and the support 31.

Preferably, the out-of-plane damper 4 and the in-plane damper 2 are eddy current dampers. The eddy current damper is not affected by temperature change, so that the vibration reduction system can adapt to the great change of the environmental temperature.

Further, for the purpose of the out-of-plane damper 4 and the in-plane damper 2, both are ball screw type eddy current dampers. The ball screw transmission has the advantages of high transmission efficiency, small initial friction, stable work and the like, the assembly is easy to control except the advantages of the axial damper, and compared with the friction damper, the ball screw transmission is sensitive to the tiny vibration of the stay cable and has better control effect on the tiny vibration.

When the in-plane vibration of the stay cable 5 occurs, the vibration displacement of the stay cable 5 is transmitted to the swinging rod 12 by the connecting rod 11 of the connecting rod transmission assembly 1, the swinging rod 12 transmits the vibration to the first connecting rod 32 through the first pin shaft 33, so that the first connecting rod 32 swings around the second pin shaft 34, and the linear relative motion of two ends can be converted into the high-speed rotation inside the damper after the relative motion of the two ends of the in-plane damper 2 is caused by the up-and-down motion of the swinging rod 12, so that the eddy current damping is generated, and the vibration energy is dissipated, thereby achieving the in-plane vibration reduction effect. When the stay cable 5 takes place the off-plane vibration, the stay cable 5 vibration displacement is transmitted swinging arms 12 by connecting rod 11 of connecting rod drive assembly 1, and swinging arms 12 carries out the horizontal hunting around first round pin axle 33, drives to connect and takes place horizontal bridge to relative motion in the off-plane attenuator 4 of protective housing 35 outer wall, turns into the inside high-speed rotation of attenuator with the straight line relative motion at both ends, and then produces the eddy current damping, dissipation vibration energy, in order to reach the effect of off-plane damping.

It is to be understood that the left-right direction refers to the direction of the transverse bridge in fig. 1.

Further, the connecting rod transmission assembly 1 is hinged with the stay cable 5 through a cable clamp 7.

Specifically, as shown in fig. 1, both ends of the in-plane damper 2 and the out-of-plane damper 4 are fixed by providing the connection seats 8. The connecting seat 8 is provided with a groove for accommodating the end part of the damper, so that the end part of the damper is stably abutted against the connecting surface.

To sum up, the utility model provides a when the damping system makes the suspension cable take place the off-plate vibration as the off-plate attenuator through the attenuator to setting up along the horizontal bridge, the atress structure of off-plate attenuator is more reasonable, has avoided the atress to concentrate on connecting portion tip, and displacement transmission efficiency is higher, and off-plate damping effect is more excellent. The inventor adopts the electric eddy current damper to replace a conventional damper in the application, and the electric eddy current damper is not influenced by temperature change, so that the vibration reduction system can adapt to the great change of the environmental temperature. The utility model provides an eddy current damper adopts the ball screw formula, compare with rack and pinion disk eddy current damper, ball screw transmission has transmission efficiency height, initial friction is little, advantages such as work is steady, it is more easily controlled to assemble except the advantage of possessing axial damper, compare with friction damper, it is sensitive to the small vibration of suspension cable, also have better control effect to small vibration, ball screw formula eddy current damper in addition, except the advantage of possessing axial damper, the rotating part still has the quality characteristic of being used to, damping efficiency is higher.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A vibration damping system for a stay cable, comprising:

the in-plane damper (2) is used for being assembled on the bridge deck of the cable-stayed bridge;

an out-of-plane damper (4) for being arranged on the deck in a transverse bridge direction;

the connecting rod transmission assembly (1) comprises a connecting rod (11) and a swinging rod (12), one end of the connecting rod (11) is used for being connected with a stay cable (5), the other end of the connecting rod is connected with the front end of the swinging rod (12), and the swinging rod (12) is connected with the in-plane damper (2) and the out-of-plane damper (4);

the link transmission assembly (1) is configured to: after oblique cable (5) take place the in-plane vibration, connecting rod (11) are driven sway rod (12) are along its axis direction reciprocating motion so that the relative motion takes place in the both ends of in-plane attenuator (2) in order to produce the damping, after oblique cable (5) take place the off-plane vibration, connecting rod (11) are driven sway rod (12) are to taking place reciprocating motion in the cross-bridge to make the relative motion takes place in the both ends of off-plane attenuator (4) in order to produce the damping.

2. The damping system according to claim 1, characterized in that the link transmission assembly (1) further comprises a first transmission part (3), the first transmission part (3) comprising:

-seats (31) for being grouped on said deck;

one end of the first connecting rod (32) is connected with the swinging rod (12), and the other end of the first connecting rod (32) is connected with the support (31) through a second pin shaft (34); wherein the content of the first and second substances,

when the inclined pull cable (5) generates in-plane vibration, the first connecting rod (32) can drive the swinging rod (12) to reciprocate along the axial direction of the swinging rod by swinging back and forth around the second pin shaft (34).

3. Damping system according to claim 2, characterized in that the oscillating lever (12) is connected to the first connecting rod (32) by a first pin (33); wherein the content of the first and second substances,

when the stay cable (5) vibrates out of the plane, the swinging rod (12) can drive the two ends of the out-of-plane damper (4) to move relatively by swinging around the first pin shaft (33) in a reciprocating manner.

4. The damping system according to claim 2, characterized in that the support (31) is provided with two spaced lugs (311), and the oscillating rod (12) has one end passing between the two lugs (311) and connected to the two lugs (311) via the second pin (34).

5. The damping system according to claim 2, characterized in that the damping system further comprises a protective box (35), the protective box (35) is assembled to the end of the oscillating rod (12), and the in-plane damper (2) is connected to the oscillating rod (12) through the protective box (35).

6. Damping system according to claim 5, characterized in that the out-of-plane damper (4) is assembled at one end to the support (31) and at the other end to the guard box (35).

7. Damping system according to claim 1, characterized in that the oscillating rod (12) is connected with its tip coaxially to the end of the in-plane damper (2) and the oscillating rod (12) is connected non-coaxially to the end of the out-of-plane damper (4).

8. The vibration damping system according to claim 1, characterized in that the out-of-plane damper (4) and the in-plane damper (2) are eddy current dampers.

9. The vibration damping system according to claim 7, characterized in that the out-of-plane damper (4) and the in-plane damper (2) are both ball screw type eddy current dampers.

10. A stay cable bridge construction, comprising: a vibration damping system as claimed in any one of claims 1 to 9.

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