CN112211468A - Multiple harmonious mass damper - Google Patents
Multiple harmonious mass damper Download PDFInfo
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- CN112211468A CN112211468A CN202011051281.5A CN202011051281A CN112211468A CN 112211468 A CN112211468 A CN 112211468A CN 202011051281 A CN202011051281 A CN 202011051281A CN 112211468 A CN112211468 A CN 112211468A
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- rope
- mass
- damping
- damper
- mass damper
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application relates to a multi-tuned mass damper, which comprises a damping box, a rope and a plurality of mass blocks; damping liquid is filled in the damping box; two ends of the rope are respectively arranged on two side walls of the damping box, and the rope has a set tension; the mass blocks are arranged on the rope and are sequentially distributed at intervals along the length direction of the rope; when the rope is in a horizontal state, the mass block is at least partially immersed in the damping liquid; when the rope is in the vertical state, the mass block positioned at the lowest part of all the mass blocks is at least partially immersed in the damping liquid. The utility model provides a damper simple structure provides quality parameter by the quality piece, provides rigidity by rope and settlement tension, provides damping parameter by rope and damping fluid, can arrange by a plurality of directions, and the quality piece distributes on the rope, can control the vibration of 360 degrees directions in the perpendicular rope plane, can play fine guard action to the engineering structure. The damper has obvious damping effect on slender members such as cable structures, suspender structures and the like.
Description
Technical Field
The application relates to the field of structural vibration control, in particular to a multiple tuned mass damper.
Background
Tuned mass dampers belong to the field of structural vibration control. The application of Tuned Mass dampers (TMD-Tuned Mass Damper) to structural vibration control was first derived from the 1909 research on dynamic vibration absorbers by Frahm, who used the vibration of one Mass to cancel or control the motion of another Mass, and the working principle of TMD systems was developed based on this idea. The traditional tuned mass damper consists of a mass block, a spring and a damping device, and the traditional tuned mass damper is successfully applied to controlling the vibration of an engineering structure, such as wind vibration, earthquake and other vibration forms.
For a traditional tuned mass damper, the control direction is mainly the stretching direction of a spring, the frequency modulation needs to debug the control frequency of the damper by adjusting the spring stiffness or the mass of a mass block, the size (the spring elongation and the mass block size) of the damper can be influenced to a certain extent, and the traditional tuned mass damper has certain limitation in the field of structural engineering vibration reduction due to the defects of single frequency, single control direction and troublesome frequency debugging. Although the multiple tuned mass damper improves the defect of single control frequency to a certain extent, the problems of single control direction and troublesome frequency debugging are not solved.
Disclosure of Invention
The embodiment of the application provides a multi-tuning mass damper to solve the problem of single control direction in the related art.
The embodiment of the application provides a multiple tuned mass damper, it includes:
the damping box is filled with damping liquid;
the two ends of the rope are respectively arranged on the two side walls of the damping box, and the rope has a set tension force;
the mass blocks are assembled on the rope and are sequentially distributed at intervals along the length direction of the rope; and the number of the first and second groups,
when the rope is in a horizontal state, the mass is at least partially immersed in the damping fluid;
when the rope is in a vertical state, the mass block positioned at the lowest part of all the mass blocks is at least partially immersed in the damping liquid.
In some embodiments, the tether extends through the mass and is fixedly connected to the mass; or the like, or, alternatively,
the mass block is poured on the rope; or the like, or, alternatively,
the rope comprises a plurality of rope segments, and two ends of the mass block are respectively connected with two rope segments.
In some embodiments, the mass is cylindrical, square, U-shaped, or tuning fork shaped.
In some embodiments, the mass block is made of iron, lead or zinc-aluminum alloy.
In some embodiments, at least one end of the rope is detachably connected to the damping box side wall through a clamp, and the clamp is used for fixing the rope on the damping box side wall when the tension of the rope is adjusted to the set tension.
In some embodiments, each of the masses is evenly distributed on the rope.
In some embodiments, the k-th order control frequency f of the damperkThe calculation formula is as follows:
wherein L is the length of the rope, F is the set tension of the rope, and m is the mass of the rope per linear meter.
In some embodiments, the damping fluid is water or silicone oil.
In some embodiments, the rope is a steel strand or a steel wire rope.
In some embodiments, the rope is an external tendon of a bridge structure.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a multi-tuning mass damper, mass parameters are provided by a mass block, rigidity is provided by a rope and a set tension force, and damping parameters are provided by the rope and damping liquid. The utility model provides a damper simple structure can arrange by a plurality of directions, for example vertical, horizontal or slant etc. and the quality piece distributes on the rope, can be like the rope, all can take place to vibrate about from top to bottom, can control the vibration of 360 degrees directions in the perpendicular rope plane, has fine power consumption effect, can play fine guard action to the engineering structure. The damper has obvious damping effect on slender members such as cable structures, suspender structures and the like.
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 schematic view of a multiple tuned mass damper provided in an embodiment of the present application;
FIG. 2 is a schematic view of a multiple tuned mass damper provided in an embodiment of the present application mounted vertically on a sling;
fig. 3 is a schematic installation diagram of a rope of the multi-tuned mass damper provided in the embodiment of the present application when an external tendon of a main bridge is used.
In the figure: 1. a damping box; 2. damping fluid; 3. a rope; 4. a mass block; 5. a sling; 6. a main bridge.
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 multi-tuning mass damper, which can solve the problem of single control direction in the related art.
Referring to fig. 1, the embodiment of the present application provides a multi-tuned mass damper, which includes a damping box 1, a rope 3 and a plurality of masses 4; damping liquid 2 is filled in the damping box 1; two ends of the rope 3 are respectively arranged on two side walls of the damping box 1, and the rope 3 has a set tension; the mass blocks 4 are arranged on the rope 3 and are sequentially distributed at intervals along the length direction of the rope 3; and the number of the first and second groups,
when the rope 3 is in a horizontal state, the mass 4 is at least partially immersed in the damping fluid 2;
when the rope 3 is in the vertical position, of all the masses 4, the lowermost mass 4 is at least partially immersed in the damping fluid 2.
The damper provided by the application has the advantages that the mass block 4 provides mass parameters, the rope 3 and the set tension force provide rigidity, and the rope 3 and the damping liquid 2 provide damping parameters. The utility model provides a damper simple structure can arrange by a plurality of directions, for example vertical, horizontal or slant etc. and quality piece 4 distributes on rope 3, can be like the rope, all can take place the vibration about from top to bottom, can control the vibration of 360 degrees directions in the perpendicular rope 3 plane, has fine power consumption effect, can play fine guard action to the engineering structure. The damper has obvious damping effect on slender members such as cable structures, suspender structures and the like.
Referring to fig. 2, a damper is provided on the hoist rope 5 to damp the hoist rope 5.
The rope 3 is connected to the mass 4 in various ways, for example, in some preferred embodiments, the rope 3 extends through the mass 4 and is fixedly connected to the mass 4; or the mass block 4 is directly poured on the rope 3; alternatively, the rope 3 comprises a plurality of cable segments, two cable segments being connected to each end of the mass 4, such that the cable segments are interleaved with the mass 4.
In some preferred embodiments, the mass 4 may be cylindrical, square, U-shaped, or tuning fork, and for other shapes, it may be selected according to actual needs.
In some preferred embodiments, the material of the mass block 4 may be iron, lead block or zinc-aluminum alloy, and for other materials, the material may be selected according to actual needs.
In some preferred embodiments, at least one end of the rope 3 is detachably attached to the side wall of the damping box 1 by a clamp for fixing the rope 3 to the side wall of the damping box 1 when the tension of the rope 3 is adjusted to a set tension. Carry out detachably through anchor clamps and connect to be convenient for adjust the settlement tension of rope 3, finally adjust the control frequency of attenuator, control frequency is abundant adjustable, and the debugging easy operation is convenient.
In some preferred embodiments, the masses 4 are evenly distributed over the rope 3, see fig. 1.
The control frequency of the damper can be adjusted by controlling the position and number of the masses 4, the diameter of the rope 3 and the set tension, etc., and in some preferred embodiments, the k-step control frequency f of the damperkThe calculation formula is as follows:
wherein, L is the length of the rope 3, F is the set tension of the rope 3, and m is the mass of the rope 3 per linear meter.
In some preferred embodiments, the damping fluid 2 may be water or silicone oil.
In some preferred embodiments, the rope 3 may be a steel strand or wire rope, and the steel strand may be 19 strands of galvanized steel that increase stiffness, improve damping, fatigue performance and durability.
The application provides a attenuator still is applicable to the supporting use of bridge construction prestressed steel strand, and external prestressing tendons is the prestressing force technique that the prestressing tendons arranged outside the structural member cross-section, belongs to one kind of unbonded prestressing force, can improve structure bearing capacity, improves rigidity, reduces the amount of deflection. This technique is considered to be one of the most advantageous techniques for existing structural reinforcement and reconstruction. At present, the method is widely applied to the new construction, reinforcement and maintenance of building engineering structures and bridge structures. The mass block 4 is attached to the external prestressed tendons to form a multi-tuning mass damper, so that the vibration of the bridge girder caused by wind load and vehicle load can be effectively controlled.
In view of this, and as shown in fig. 3, in some preferred embodiments, the rope 3 is an extra-corporeal tendon of the main bridge 6.
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 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 an … …" does not exclude the presence of other identical 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. A multi-tuned mass damper, comprising:
the damping box (1), the damping fluid (2) is filled in the damping box (1);
the two ends of the rope (3) are respectively arranged on the two side walls of the damping box (1), and the rope (3) has a set tension;
the mass blocks (4) are assembled on the rope (3) and are sequentially distributed at intervals along the length direction of the rope (3); and the number of the first and second groups,
-said mass (4) is at least partially immersed in said damping fluid (2) when said rope (3) is in a horizontal condition;
when the rope (3) is in a vertical state, the mass block (4) positioned at the lowest part of all the mass blocks (4) is at least partially immersed in the damping liquid (2).
2. The multi-tuned mass damper of claim 1, wherein:
the rope (3) penetrates through the mass block (4) and is fixedly connected with the mass block (4); or the like, or, alternatively,
the mass block (4) is poured on the rope (3); or the like, or, alternatively,
the rope (3) comprises a plurality of rope segments, and two ends of the mass block (4) are respectively connected with two rope segments.
3. The multi-tuned mass damper of claim 1, wherein: the mass block (4) is cylindrical, square, U-shaped or tuning fork-shaped.
4. The multi-tuned mass damper of claim 1, wherein: the mass block (4) is made of iron, lead block or zinc-aluminum alloy.
5. The multi-tuned mass damper of claim 1, wherein: at least one end of the rope (3) is detachably connected to the side wall of the damping box (1) through a clamp, and the clamp is used for fixing the rope (3) on the side wall of the damping box (1) when the tension of the rope (3) is adjusted to a set tension.
6. The multi-tuned mass damper of any of claims 1 to 5, wherein: the masses (4) are distributed uniformly on the cable (3).
7. The multi-tuned mass damper of claim 6, wherein: k-order control frequency f of the damperkThe calculation formula is as follows:
wherein L is the length of the rope (3), F is the set tension of the rope (3), and m is the mass of the rope (3) per linear meter.
8. The multi-tuned mass damper of claim 1, wherein: the damping liquid (2) is water or silicone oil.
9. The multi-tuned mass damper of claim 1, wherein: the rope (3) is a steel strand or a steel wire rope.
10. The multi-tuned mass damper of claim 1, wherein: the rope (3) is an external prestressed tendon of a bridge structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051281.5A CN112211468A (en) | 2020-09-29 | 2020-09-29 | Multiple harmonious mass damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051281.5A CN112211468A (en) | 2020-09-29 | 2020-09-29 | Multiple harmonious mass damper |
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| CN112211468A true CN112211468A (en) | 2021-01-12 |
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| CN202011051281.5A Pending CN112211468A (en) | 2020-09-29 | 2020-09-29 | Multiple harmonious mass damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324410A (en) * | 2022-09-02 | 2022-11-11 | 山东建筑大学 | Steel pipe tower wind vibration control device and steel pipe tower |
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