CN105672518B - A kind of tuned mass damper for power consumption of being shaken using whirlpool - Google Patents

Abstract

The invention relates to a tuned mass damper utilizing eddy vibration energy dissipation, which includes a casing, a liquid cylinder, an upper mass block, a lower mass block, a spring, an elongated elastic body and a damping fluid, and the damper communicates with the main body through the casing Structural connection, the shell is connected to the liquid cylinder, the elongated elastic body is arranged inside the liquid cylinder, and the two ends of the elongated elastic body are respectively connected to the upper mass block and the lower mass block , the damping fluid is filled in the hydraulic cylinder, the upper mass block and the lower mass block are both connected to the spring, and the mass block and the lower mass block are collectively referred to as a mass block. The invention has the advantages of novel damping form, small required space, good durability, convenient construction and installation, and the like.

Description

A tuned mass damper using eddy vibration energy dissipation

technical field

The invention is a tuned vibration damping device for vibration control of engineering structures, which is used for dynamic response control caused by earthquake action or wind load, belongs to the technical field of vibration damping control of building structures, and specifically relates to a vibration damping device using eddy vibration energy consumption Tuned mass damper.

Background technique

With the improvement of anti-vibration (seismic) safety and comfort requirements for civil engineering structures, more and more engineering structures adopt structural vibration control technology. A tuned mass damper (Tuned Mass Damper, TMD) system is a type of structural passive vibration control system, which consists of a main structure and a substructure attached to the main structure. Among them, the substructure includes solid mass, spring shock absorber and damper, etc. It has mass, stiffness and damping. By changing the mass or stiffness, the frequency of the substructure is adjusted to make it as close as possible to the fundamental frequency or excitation frequency of the main structure. When the main When the structure is excited to vibrate, the substructure will generate an inertial force opposite to the vibration direction of the structure to act on the main structure, so that the vibration response of the main structure is attenuated and controlled. The substructure is equivalent to a damper in the vibration reduction control process, so the substructure is called a tuned mass damper.

In the commonly used TMD, the mass is provided by an additional mass block, the stiffness is provided by suspension, spring, rubber block, etc., and the damping is provided by viscous damping or frictional damping. In practical engineering applications, due to the limitation of structural space, there are high requirements for the working space of TMD. How to complete all functions of TMD in a small space becomes the key point of design. For this reason, devices such as an ultra-low frequency pendulum tuned mass damper and its implementation method (CN104612279 A), an ultra-low frequency FM mass damper (CN 203626078 U) and other devices have appeared successively from the perspective of reducing the size of the stiffness element, from reducing From the perspective of the size of the damping element, devices such as the permanent magnetic levitation horizontal tuned mass damper (CN 204098268 U), the pendulous eddy current tuned mass damper device (CN 103132628 A) and other devices have appeared, and a kind of rigidity has emerged from the perspective of TMD integration. A horizontal omnidirectional tuned mass damper integrated with damping (CN 203769106 U), an integrated pore energy-dissipating annular tuned mass damper (CN 104674968 A) and other devices.

The current damping forms in these TMDs mainly adopt the principles of electromagnetic and viscous, etc. In the principle of viscous damping, the damping mainly comes from the energy consumption of pores in the fluid. The present invention will use the principle that vortex-induced resonance is prone to occur in the flowing liquid of the slender elastic circular tube, and develop a tuned mass damper that utilizes vortex-induced resonance energy consumption, thereby providing another damping generation for the design of the tuned mass damper The way.

Contents of the invention

The purpose of the present invention is to overcome the problems existing in the prior art, and to provide a tuned mass damper utilizing eddy vibration energy consumption with novel damping form, small required space, good durability and convenient construction. It is reasonably integrated with the damping member in a small space, which greatly reduces the space required by the TMD. At the same time, it uses the large vibration deformation of the elongated elastic body when it moves in the liquid to dissipate the TMD motion. energy, providing the damping required by the TMD.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention is realized through the following technical solutions:

A tuned mass damper utilizing eddy vibration energy dissipation, comprising a housing, a liquid cylinder, an upper mass, a lower mass, a spring, an elongated elastic body and a damping fluid, the damper is connected to a main structure through the housing, The shell is connected to the liquid cylinder, and the elongated elastic body is arranged inside the liquid cylinder, and the two ends of the elongated elastic body are respectively connected with the upper mass block and the lower mass block, and the The damping fluid is filled in the hydraulic cylinder, the upper mass block and the lower mass block are both connected to the spring, and the mass block and the lower mass block are collectively referred to as a mass block.

Further, the shell is composed of an upper cover plate, a side wall and a lower cover plate, the liquid cylinder is composed of a liquid cylinder cover plate and a liquid cylinder side wall, the elongated elastic body has a circular cross-section, and is composed of a waterproof shell, Composed of stiffness layer and damping layer.

Further, the cover plate of the liquid cylinder is firmly connected with the side wall of the casing; the mass block is connected with the side wall of the casing through a spring.

Preferably, the mass provides mass, and the spring provides stiffness.

Further, the damping fluid is a liquid whose physical parameters can cause the elongated elastic body to undergo vortex induced resonance.

Further, the shape of the damper can be designed as other horizontal cross-sectional forms such as rectangle or square as required, and the damper can use rubber pads or other methods to provide stiffness.

Beneficial effects of the present invention:

The energy-dissipating tuned mass damper utilizing eddy vibration has the advantages of novel damping form, small required space, good durability, convenient construction and the like. The closed design is adopted to meet the functions while ensuring that the TMD is not affected by harsh weather when it is installed outside, so that it can be used in various regions, and improves the durability of the TMD and the stability of its functional output; compared with Compared with other TMDs, the large-scale deformation of the slender elastic body during vortex-induced resonance is used to dissipate energy and provide damping, thus providing TMD with more novel, effective and stable damping characteristics. The device can be used as the TMD subsystem of the engineering structure to dissipate the energy input to the structure by disasters such as earthquakes and winds, thereby ensuring the safety of the engineering structure.

Description of drawings

Fig. 1 is a structural schematic diagram of a longitudinal section structure of a tuned mass damper utilizing eddy vibration energy dissipation in the present invention;

Fig. 2 is a structural schematic diagram of a sectional structure 1-1 of a tuned mass damper utilizing eddy vibration energy dissipation according to the present invention;

Fig. 3 is a 2-2 cross-sectional structural schematic diagram of a tuned mass damper utilizing eddy vibration energy dissipation according to the present invention;

Fig. 4 is a 3-3 cross-sectional structural schematic diagram of a tuned mass damper utilizing eddy vibration energy dissipation according to the present invention;

Fig. 5 is a structural schematic diagram of a longitudinal section structure of another embodiment of a tuned mass damper utilizing eddy vibration energy dissipation according to the present invention;

Fig. 6 is a schematic diagram of the construction scheme of the slender elastic body of the tuned mass damper utilizing eddy vibration energy dissipation according to the present invention.

Explanation of symbols in the figure: 1. shell, 11. upper cover plate, 12. side wall, 13. lower cover plate, 2. liquid cylinder, 21. liquid cylinder cover plate, 22. liquid cylinder side wall, 3. mass block, 4. Spring, 5. Elongated elastic body, 6. Damping fluid.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

Referring to Fig. 1-Fig. 6, a tuned mass damper using eddy vibration energy dissipation includes a housing 1, a liquid cylinder 2, an upper mass, a lower mass, a spring 4, an elongated elastic body 5 and a damping fluid 6 , the damper is connected to the main structure through the casing 1, the casing 1 is connected to the hydraulic cylinder 2, the elongated elastic body 5 is arranged inside the hydraulic cylinder 2, and the elongated elastic body 5 The two ends of the upper mass block and the lower mass block are respectively connected, the damping fluid 6 is filled in the hydraulic cylinder 2, and the upper mass block and the lower mass block are both connected to the spring 4 , the mass block and the lower mass block are collectively referred to as mass block 3 .

Further, the housing 1 is composed of an upper cover plate 11, a side wall 12 and a lower cover plate 13, the liquid cylinder 2 is composed of a liquid cylinder cover plate 21 and a liquid cylinder side wall 22, and the elongated elastic body 5 is The circular section is composed of a waterproof shell 51, a stiffness layer 52 and a damping layer 53. The connection between the elongated elastic body 5 and the mass block 3 can be designed as hinged, rigid or semi-rigid according to rigidity requirements. The waterproof casing 51 is located at the outermost side of the elongated elastic body 5, and is used to protect the stiffness layer 52 and the damping layer 53 from working normally in liquid, and the formed outer cylindrical shape provides one of the conditions for vortex induced resonance to occur. One; the rigidity layer 52 provides rigidity for the elongated elastic body 5, and steel, aluminum, etc. can be selected according to needs; the damping layer 53 provides energy-dissipating damping for the elongated elastic body 5, which can be selected Lead, high damping rubber and other energy-dissipating materials.

Further, the liquid cylinder cover plate 21 is firmly connected to the side wall 12 of the housing 1 ; the mass block 3 is connected to the side wall 12 of the housing 1 through a spring 4 .

Preferably, the mass block 3 provides mass, the spring 4 provides stiffness, and the inertial force causes the mass block 3 to slide, so that the elongated elastic body 5 and the damping fluid 6 in the hydraulic cylinder 2 Relative movement occurs, and within the speed range of the movement, the specially designed elongated elastic body 5 with a circular cross-section undergoes relatively large-scale transverse vortex-induced resonance, and through the large damping layer 53 in the elongated elastic body 5 Amplitude deformation dissipates energy.

Further, the damping fluid 6 is a liquid whose physical parameters can cause the elongated elastic body 5 to undergo vortex induced resonance.

Further, the shape of the damper can be designed as other horizontal cross-sectional forms such as rectangle or square as required, and the damper can use rubber pads or other methods to provide stiffness.

Preferably, the point contact between the mass block 3 and the upper cover plate 11 and the lower cover plate 13 of the housing 1 is processed so that the mass block 3 can slide freely with the upper cover plate 11 and the lower cover plate 13; the mass block 3 The surface of the cover plate 21 of the hydraulic cylinder also adopts sliding treatment to reduce the frictional resistance during relative sliding; a small amount of rigid columns can be arranged between the upper mass block and the lower mass block to ensure the synchronous movement of the upper mass block and the lower mass block.

Further, the spring 4 is composed of two parts, a telescopic guide rod and a spring, and its stiffness can be properly adjusted within a certain range according to the actual measurement results after production. Fully articulated.

Principle of the present invention:

A mass provides mass, springs or rubber pads provide stiffness, and large movements of elongated elastomers provide damping. When the structure is vibrated by dynamic loads such as wind loads, under the action of inertial force, the designed mass blocks reciprocate, which drives the connected elongated elastic body and the damping fluid in the hydraulic cylinder to move relative to each other. Because TMD often It vibrates at a specific frequency, so most of the time the relative motion between the slender elastic body and the damping fluid is within a certain speed range. In this speed range, the specially designed circular cross-section slender elastic body has a relatively large transverse vortex excitation. resonate, and dissipate energy through large deformations of the damping layer in the elongated elastomer. This reduces the energy transferred from the main structure to the self-structure, controls the response of the main structure under dynamic load, and ensures the safety of the main structure.

Concrete implementation steps of the present invention:

(1) Analyze the structure, calculate the required TMD parameters, and determine the size and parameters of the damper accordingly.

(2) The damper has an axisymmetric structure, the TMD shell 1, the liquid cylinder 2 and the mass block 3 are coaxial, and a filling hole for fluid injection is opened on the side wall 22 of the liquid cylinder in advance, and the lower half of the liquid cylinder cover plate 21 and the The side wall 12 is welded and assembled, and then the liquid cylinder side wall 22 is installed on the lower liquid cylinder cover plate 21 , and then the upper liquid cylinder cover plate is connected with the liquid cylinder side wall 22 and the side wall 12 .

(3) Process the slender cylindrical damping layer 53 , cover or wrap the stiffness layer 52 outside it, and finally cover the stiffness layer 52 with a waterproof shell 51 to assemble the slender elastic body 5 .

(4) Connect the slender elastic body 5 to the lower mass block, install the lower mass block in place, and perform sliding treatment on the contact surface between the mass block 3 and the lower liquid cylinder cover plate 21; The installation hole of the slender elastic body 5 is reserved in the middle, the upper mass block is installed in place, the upper mass block and the slender elastic body 5 are connected through the reserved installation hole, and the contact surface is treated.

(5) Input the damping fluid 6 through the perfusion holes reserved on the side wall 12 and the side wall 22 of the cylinder; connect the mass block 3 to the side wall 12 through the spring 4, and position it.

(6) Install the upper cover plate 11 and the lower cover plate 13, and process the contact surfaces between them and the mass block 3; finally, the finished TMD can be installed in a proper position of the structure.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. a kind of tuned mass damper for power consumption of being shaken using whirlpool, it is characterised in that including shell（1）, fluid cylinder（2）, improve quality Block, lower mass, spring（4）, elongated resilient body（5）And damper fluid（6）, the damper passes through the shell（1）With master Structure connects, the shell（1）With the fluid cylinder（2）Connection, the fluid cylinder（2）Inside is provided with the elongated resilient body（5）, institute State elongated resilient body（5）Both ends improve quality block and the lower mass is connected, the fluid cylinder with described respectively（2）Inside fill institute State damper fluid（6）, it is described improve quality block and the lower mass all with the spring（4）Connection, block and the institute of improving quality State lower mass and be referred to as mass（3）, the shell（1）By upper cover plate（11）, side wall（12）And lower cover（13）Composition, institute State fluid cylinder（2）By fluid cylinder cover plate（21）With fluid cylinder side wall（22）Composition, the elongated resilient body（5）For circular cross-section, by waterproof Shell（51）, stiffness layer（52）And damping layer（53）Composition, the mass（3）Quality is provided, the spring (4) provides firm Degree.

A kind of 2. tuned mass damper of power consumption of being shaken using whirlpool according to claim 1, it is characterised in that the fluid cylinder Cover plate (21) is firmly connected with the side wall (12) of the shell (1)；Mass (3) passes through spring (4) and the shell（1） The side wall (12) connection.

3. the tuned mass damper of power consumption according to claim 1 of being shaken using whirlpool, it is characterised in that the damper fluid (6) be physical parameter can make the elongated resilient body (5) occur Vortex-excited vibration liquid.

4. the tuned mass damper of power consumption according to claim 1 of being shaken using whirlpool, it is characterised in that the damper Rectangle is shaped as, the damper provides rigidity using rubber blanket.