CN217601205U - Suspension bridge sling rigid vibration reduction frame with impact energy dissipation function - Google Patents

Abstract

The application relates to a suspension bridge hoist cable rigidity damping frame of energy consumption function is strikeed in area, it includes: a vibration damping space is arranged in the damper container, and a sling connecting part is arranged on the damper container; the sling connecting clamp is detachably connected with the sling connecting part; a plurality of damping assemblies are located in the vibration damping space, each damping assembly including: a rigid circular ring; the rigidity of each group of annular buffer washer groups is unequal, and the annular buffer washer groups are alternatively arranged on the inner wall of the rigid circular ring; the impact cylinder is inserted through the ring-shaped cushion washer group, and the bottom thereof is movably contacted with the inner bottom wall of the damper container. Each damping assembly corresponds to an annular buffer washer group with different rigidity, the appropriate rigidity can be selected according to needs, variable rigidity is achieved, sling broadband vibration control is achieved, the functions of rigid connection and impact energy dissipation between slings are achieved, vibration in all directions of the same plane of the slings can be controlled, and the damping effect on long and thin components such as vertical slings and suspenders is obvious.

Description

Suspension bridge sling rigid vibration reduction frame with impact energy dissipation function

Technical Field

The application relates to the technical field of vibration reduction, in particular to a suspension bridge sling rigid vibration reduction frame with an impact energy consumption function.

Background

As the main bridge type with the most spanning capability at present, a suspension bridge scheme with 2000-meter span is implemented or researched by a plurality of domestic bridges, for example, a planned main bridge of a lion-ocean passageway adopts a single-span steel truss bridge scheme with a main span of 2180m, and a bridge project is spanning 2000 meters in a large step. Compared with a cable-stayed bridge, the suspension bridge has stronger spanning capability, but the whole dynamic rigidity is relatively flexible, and the dynamic performance and the dynamic response under the action of wind, earthquake and the like become key factors for controlling success and failure no matter the suspension bridge is a large-span suspension bridge built at present or an ultra-large-span suspension bridge with larger spanning capability in the future. The suspension cable of the suspension bridge is used as a main stressed component, has the characteristics of small damping, light weight, low fundamental frequency and dense dominant frequency, easily generates obvious vibration problem under a complex wind environment, influences the fatigue performance and durability of the suspension cable, and can cause adverse influence on the whole safety of the bridge in the past if not controlled.

Suspension bridge hoist cable has structural style such as steel wire rope, steel strand cable and parallel steel wire cable, and along with the increase of suspension bridge span, hoist cable length increases thereupon, and the data show: the longest sling of the suspension bridge with the main span exceeding 1600m is close to about 200m, the self-vibration fundamental frequency is very low, and the initial damping ratio of the sling structure is very small, so that the suspension bridge is very easy to greatly vibrate under the action of wind, wind and rain and bridge deck traffic load. Because the large-span suspension bridge is basically a vertical suspension cable structure and is arranged in parallel in pairs, the streamline section form and the arrangement composition mode of the large-span suspension bridge can generate wind-induced vortex-induced vibration, wake flow galloping vibration, parameter vibration caused by the vibration of a main beam or a main cable and the like. In addition, the vibration modes of the double-sling or multi-sling design adopted by the existing large-span suspension cable are more complex and diversified (such as the same-phase vibration mode and the opposite-phase vibration mode of the parallel double-sling) compared with the single-sling, and the existing single vibration reduction measure cannot effectively control the multiple vibration modes and frequencies of the sling.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a suspension bridge sling rigid vibration reduction frame with an impact energy consumption function, and aims to solve the problem that in the related art, a single vibration reduction measure cannot effectively control multiple vibration modes and frequencies of a sling.

In a first aspect, a suspension bridge sling rigid vibration damping frame with impact energy dissipation function is provided, which includes:

a damper container having a vibration damping space therein and having a sling wire connection portion thereon;

a sling attachment clip detachably attachable to the sling attachment portion;

a plurality of damping assemblies located within the vibration attenuation space, each of the damping assemblies comprising:

-a rigid circular ring;

-a plurality of sets of annular cushion washers, each set of annular cushion washers having an unequal stiffness and being alternatively mounted on the inner wall of the rigid ring;

-an impact cylinder, which is pierced through said annular cushion washer set and whose bottom is in movable contact with the inner bottom wall of the damper container.

In some embodiments, a set distance is provided between the circumferential surface of the impact cylinder and the inner surface of the annular cushion washer group.

In some embodiments, the set of ring-shaped cushion rings comprises-a plurality of ring-shaped cushion rings, the cross-sectional shape of which is trapezoidal; the stiffness of each annular cushion washer may be equal or unequal.

In some embodiments, the annular cushion washers in the annular cushion washer group are arranged coaxially with the rigid annular ring and are arranged at intervals; the distance between two adjacent annular cushion washers is equal or unequal.

In some embodiments, the material of the annular cushion washer set is a rubber pad or a polyurethane cushion.

In some embodiments, a plurality of bull-eye universal wheels are arranged at the bottom of the impact cylinder, and the bull-eye universal wheels are distributed in an annular or rectangular shape.

In some embodiments, the damping space has a racetrack shape in plan view, and a plurality of the damping members are in relative sliding contact with each other and with the inner wall of the damper container.

In some embodiments, the number of sling attachment portions is two; or

The number of the sling connecting parts is four, and the sling connecting parts are distributed on the periphery of the damper container.

In some embodiments, the sling connecting part is provided with a first connecting plane, and a first sling mounting groove is arranged on the first connecting plane; first connecting holes are formed in the first connecting plane and located on two sides of the first sling mounting groove;

the sling connecting clamp is provided with a second connecting plane, and the second connecting plane is provided with a second sling mounting groove corresponding to the first sling mounting groove; and second connecting holes corresponding to the first connecting holes are formed in the second connecting plane and positioned on two sides of the second sling mounting groove.

In some embodiments, the top of the damper container is provided with a mounting groove, and a sealing cover plate is hermetically connected to the mounting groove.

The technical scheme who provides this application brings beneficial effect includes:

the embodiment of the application provides a suspension bridge sling rigid vibration damping frame with an impact energy dissipation function, wherein a plurality of damping components are arranged in a vibration damping space of a damper container, each damping component comprises a rigid circular ring, and an annular buffer gasket group and an impact cylinder which are arranged in the rigid circular ring, the impact cylinder penetrates through the annular buffer gasket group, and the bottom of the impact cylinder is in movable contact with the inner bottom wall of the damper container; the damper container is installed on the sling through a sling connecting part and a sling connecting clamp, so that the impact cylinder and the annular buffer gasket group repeatedly collide in the using process, a plurality of damping assemblies repeatedly collide with the inner wall of the damper container, repeated collision also occurs among the damping assemblies, momentum is exchanged with the main vibration system through collision, and part of mechanical energy of the main vibration system is dissipated, so that the device can inhibit structure forced vibration, self-excited vibration and nonlinear vibration.

In addition, each damping assembly corresponds to a plurality of annular buffer washer sets with different rigidity, and proper rigidity can be selected according to needs to realize variable rigidity, so that broadband vibration control of the slings is realized, the rigid connection and impact energy dissipation functions among the slings are achieved, the structure is simple, vibration in all directions of the same plane of the slings can be controlled, and the damping effect on long and thin components such as vertical slings and suspenders is obvious.

Drawings

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

Fig. 1 is a structural diagram of a suspension bridge sling rigid vibration damping frame with an impact energy dissipation function provided in an embodiment of the present application;

fig. 2 is a schematic diagram of an internal structure of a suspension bridge sling rigid vibration-damping frame with an impact energy-dissipating function according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an impact cylinder provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a rigid ring and a ring cushion washer assembly connection according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a single suspension bridge sling rigid vibration reduction frame with an impact energy dissipation function and a sling connection provided in an embodiment of the present application;

fig. 6 is a schematic view illustrating connection between a plurality of suspension bridge suspension cable rigid damping frames with impact energy dissipation function and suspension cables according to an embodiment of the present application.

In the figure: 1. a damper container; 2. a sling attachment portion; 3. the sling is connected with the clamp; 4. a damping assembly; 400. a rigid circular ring; 401. a ring-shaped cushion washer set; 402. impacting the cylinder; 403. A bull's eye universal wheel; 5. a first sling mounting groove; 6. a first connection hole; 7. a second connection hole; 8. and sealing the cover plate.

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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a suspension bridge sling rigid vibration reduction frame with an impact energy consumption function, and aims to solve the problem that in the related art, a single vibration reduction measure cannot effectively control multiple vibration modes and frequencies of a sling.

Referring to fig. 1 to 6, a rigid damping frame for a suspension bridge cable with impact energy dissipation function includes: a damper container 1, a sling attachment clip 3 and a plurality of damping assemblies 4.

Wherein, a vibration damping space is arranged in the damper container 1, and a sling connecting part 2 is arranged outside the damper container; the damper container 1 is cubic in shape. Hoist cable connecting clamp 3 and 2 releasable connection of hoist cable connecting portion to hoist cable connecting portion 2 forms the centre gripping space that is used for connecting the hoist cable, and hoist cable connecting clamp 3 makes this damping frame can install in a flexible way on the hoist cable with the cooperation of hoist cable connecting portion 2.

A plurality of damping units 4 are installed in the vibration damping space, each of which includes: the shock absorber comprises a rigid circular ring 400, an impact cylinder 402 and a plurality of groups of annular buffer gasket groups 401, wherein the rigidity of each group of annular buffer gasket groups 401 is unequal, and the annular buffer gasket groups are alternatively arranged on the inner wall of the rigid circular ring 400; the impact cylinder 402 is inserted through the ring-shaped cushion washer group 401, and the bottom thereof is in movable contact with the inner bottom wall of the damper container 1.

In the assembly stage, the annular buffer gasket group 401 with proper rigidity is selected according to the vibration reduction requirement of the sling and is arranged on the inner wall of the rigid circular ring 400, the damper container 1 is arranged on the sling through the sling connecting part 2 and the sling connecting clamp 3 after being arranged on the sling, so that the impact cylinder 402 repeatedly collides with the annular buffer gasket group 401 in the use process, a plurality of damping assemblies 4 repeatedly collide with the inner wall of the damper container 1, repeated collision also occurs among the damping assemblies 4, momentum is exchanged with the sling (main vibration system) through collision, and part of mechanical energy of the main vibration system is dissipated, so that the vibration reduction frame can inhibit forced vibration, self-excited vibration and nonlinear vibration of the structure.

In addition, each damping assembly 4 corresponds to a plurality of annular buffer washer sets 401 with different rigidity, and proper rigidity can be selected according to needs to realize variable rigidity, so that broadband vibration control of the slings is realized.

In some preferred embodiments, a set distance is provided between the circumferential surface of the impact cylinder 402 and the inner surface of the annular cushion washer group 401, and the set distance is 3-5mm. The ring cushion washer group 401 includes 3 to 4 ring cushion washers, each of which has equal or unequal rigidity. The annular buffer gasket can be made of rubber pads, polyurethane buffer pads and the like, the cross section of the annular buffer gasket is trapezoidal, the inner part is narrow, the outer part is wide (rigidity is changed), the annular buffer gasket is arranged close to the rigid ring, and the number of the annular buffer gasket can be selected according to the impact effect.

Wherein, assuming that the damping component 4 is free to move, the motion equation of the system between two collisions is:

|x-z|＞0

through collision repeated energy consumption, through the annular buffer gasket with variable rigidity k and the set distance d, the broadband control of the vibration damping frame is realized.

M is the modal mass of the controlled structure, K is the stiffness of the controlled structure, C is the damping coefficient of the controlled structure, F ₀ The amplitude of the external simple harmonic excitation force, x is the vibration displacement of the controlled structure,

in order to control the speed of vibration of the structure,

is the vibration acceleration of the controlled structure, omega is the vibration angular frequency of the controlled structure, t is time, alpha is a phase angle, m is the weight of the impact mass block, z is the displacement of the impact mass block,

is the impact mass acceleration.

Further, the annular cushion washers in the annular cushion washer group 401 are arranged coaxially with the rigid circular ring 400 and are arranged at intervals; the distances between two adjacent annular cushion washers are equal or unequal, and the impact effect can be controlled.

In some preferred embodiments, the bottom of the impact cylinder 402 is provided with a plurality of bull-eye universal wheels 403, and the plurality of bull-eye universal wheels 403 are distributed in a ring or rectangular shape. The bull's eye castor 403 is provided to allow the impact cylinder 402 to move in any direction in the plane and to reduce friction and enhance post-impact movement.

In some preferred embodiments, the damping space is racetrack-shaped in plan projection, and the plurality of damping units 4 are in relative sliding contact with each other and with the inner wall of the damper container 1.

In some preferred embodiments, the number of sling connection portions 2 is two, which matches the double sling;

or the number of the sling connecting parts 2 is four, the sling connecting parts are matched with four slings, and the sling connecting parts 2 are distributed around the damper container 1.

In some preferred embodiments, the sling attachment portion 2 has a first attachment plane with a first sling mounting slot 5; first connecting holes 6 are formed in the first connecting plane and positioned on two sides of the first sling mounting groove 5;

a second connecting plane is arranged on the sling connecting clamp 3, and a second sling mounting groove corresponding to the first sling mounting groove 5 is arranged on the second connecting plane; a second connecting hole 7 corresponding to the first connecting hole 6 is arranged on the second connecting plane and positioned on two sides of the second sling mounting groove; and then matching with the connecting bolt.

Therefore, the sling connecting clamp 3 and the sling connecting part 2 can be detachably connected through the connection mode; other detachable connections are of course not excluded.

In some preferred embodiments, the top of the damper container 1 is provided with a mounting groove, and a sealing cover plate 8 is hermetically connected to the mounting groove. The sealing cover plate 8 can be welded after the damping assembly 4 is installed, so that the vibration damping frame is sealed integrally and is watertight, and the durability is enhanced.

The principle of the application is as follows:

in the assembly stage, the annular buffer gasket group 401 with proper rigidity is selected according to the vibration reduction requirement of the sling and is arranged on the inner wall of the rigid circular ring 400, the damper container 1 is arranged on the sling through the sling connecting part 2 and the sling connecting clamp 3 after the annular buffer gasket group is arranged on the sling, so that the impact cylinder 402 and the annular buffer gasket group 401 repeatedly collide in the use process, the damping assemblies 4 repeatedly collide with the inner wall of the damper container 1, repeated collision also occurs among the damping assemblies 4, momentum is exchanged with the sling (a main vibration system) through collision, and a part of mechanical energy of the main vibration system is dissipated, so that the vibration reduction frame can inhibit forced vibration, self-excited vibration and nonlinear vibration of the structure.

In addition, each damping assembly 4 corresponds to a plurality of annular buffer washer sets 401 with different rigidity, and can select proper rigidity as required to realize variable rigidity, thereby realizing broadband vibration control of the slings, having rigid connection and impact energy dissipation functions among the slings, having simple structure, being capable of controlling vibration of the slings in all directions on the same plane, and having obvious vibration reduction effect on long and thin components such as vertical slings and suspenders.

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 "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 this 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 phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements 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. The utility model provides a suspension bridge hoist cable rigidity damping frame of energy dissipation function is strikeed in area which characterized in that, it includes:

a damper container (1) having a vibration damping space therein and having a sling attachment portion (2) thereon;

a sling attachment clamp (3) detachably attached to the sling attachment portion (2);

a plurality of damping assemblies (4) located within the vibration attenuation space, each damping assembly comprising:

-a rigid circular ring (400);

-a plurality of annular cushion washer sets (401), each annular cushion washer set (401) having an unequal stiffness and being alternatively mounted on the inner wall of the rigid circular ring (400);

-an impact cylinder (402) pierced through said annular cushion washer group (401) and having its bottom in movable contact with the inner bottom wall of the damper container (1).

2. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 1, wherein:

and a set distance is arranged between the peripheral surface of the impact cylinder (402) and the inner surface of the annular buffer gasket group (401).

3. The suspension bridge sling rigid vibration damping mount with impact energy dissipating function as claimed in claim 1, wherein:

the annular buffer gasket group (401) comprises 3-4 annular buffer gaskets, and the cross section of each annular buffer gasket is trapezoidal; the stiffness of each annular cushion washer may be equal or unequal.

4. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 3, wherein:

the annular buffer gaskets in the annular buffer gasket group (401) are coaxially arranged with the rigid circular ring (400) and are arranged at intervals; the distances between two adjacent annular buffer gaskets are equal or unequal.

5. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 3, wherein:

the annular buffer gasket group (401) is made of a rubber pad or a polyurethane buffer pad.

6. The suspension bridge sling rigid vibration damping mount with impact energy dissipating function as claimed in claim 1, wherein:

the bottom of the impact cylinder (402) is provided with a plurality of bull-eye universal wheels (403), and the bull-eye universal wheels (403) are distributed in an annular or rectangular shape.

7. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 1, wherein:

the projection of the vibration reduction space on the plane is in a runway shape, and a plurality of damping assemblies (4) are in relative sliding contact with each other and are in relative sliding contact with the inner wall of the damper container (1).

8. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 1, wherein:

the number of the sling connecting parts (2) is two; or

The number of the sling connecting parts (2) is four, and the sling connecting parts are distributed on the periphery of the damper container (1).

9. The suspension bridge sling rigid vibration damping mount with impact energy dissipating function as claimed in claim 1, wherein:

the sling connecting part (2) is provided with a first connecting plane, and a first sling mounting groove (5) is arranged on the first connecting plane; first connecting holes (6) are formed in the first connecting plane and positioned on two sides of the first sling mounting groove (5);

a second connecting plane is arranged on the sling connecting clamp (3), and a second sling mounting groove corresponding to the first sling mounting groove (5) is arranged on the second connecting plane; and second connecting holes (7) corresponding to the first connecting holes (6) are formed in the second connecting plane and positioned on two sides of the second sling mounting groove.

10. The suspension bridge sling rigid vibration damping mount with impact dissipating energy function as claimed in claim 1, wherein:

the top of attenuator container (1) is equipped with the mounting groove, sealing connection has sealed apron (8) on the mounting groove.

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