Semi-active tuned mass damping system based on basin-type damper

Abstract

The utility model discloses a semi-active tuned mass damping system based on a basin-type damper. The semi-active tuned mass damping system comprises a mass unit, an adjustable spring unit, a damping unit, a guide unit and a mounting bottom plate, the mass unit comprises a fixed mass assembly and a free mass assembly; the adjustable spring unit comprises a plurality of detachable springs; the guide unit comprises a guide rod and a sliding piece; the damping unit is a basin-type damper and comprises a bottom end plate connected with the center of the mounting bottom plate, a hollow columnar shell vertically arranged on the bottom end plate, a plunger telescopically arranged in the center of the hollow columnar shell and a top end plate arranged on the plunger; the top end plate is positioned above the top plate; the top end plate and the top plate are fixed through fixing columns which are uniformly arranged at intervals; damping liquid is arranged in the hollow columnar shell; by controlling the depth of the plunger in the hollow columnar shell, the contact area of the plunger entering the damping liquid is adjusted, semi-active adjustment of the damping ratio of the whole TMD system is controlled, and then efficient work of the TMD is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of damping and vibration reduction, more particularly, it relates to a semi-active tuned mass damper system based on basin damper. BACKGROUND

[0002] As an important part of lifeline engineering, long-span bridges occupy an important position in the political and economic fields, and their safety should be given special attention. The light and flexible characteristics of modern bridge structures pose a challenge to the wind and seismic resistance of the structure itself. With the continuous increase in span, wind-induced vibration problems of bridge structures have become increasingly prominent, greatly affecting the safety of bridge structures and the comfort of vehicle travel. Therefore, it is of great practical significance to take effective measures to control the harm of wind to the bridge within the allowable range.

[0003] In order to ensure the wind resistance safety, driving comfort and the absence of any wind-induced vibration problems of the bridge, the prior art proposes to use TMD vibration reduction measures. TMD is widely used in structural vibration control, especially for vortex-induced vibration control of long-span bridges caused by wind vibration. However, TMD currently mainly uses passive control, and its tuning frequency and damping ratio are fixed and cannot be actively adjusted when the frequency of the main structure drifts. When the natural frequency of the bridge structure changes due to environmental changes or load changes, the TMD with fixed parameters may not provide the best vibration reduction effect.

[0004] Therefore, there is an urgent need for a tuned mass damper system that can semi-actively adjust the damping ratio. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the utility model provides a semi-active tuned mass damper system based on a basin damper, which uses a basin damper, a non-traditional small hole throttling type, and the basin damper is designed in an open type to avoid the deformation damage and oil leakage problems often occurring in piston dampers. By controlling the depth of the plunger in the hollow cylindrical shell, adjusting the contact area of the plunger entering the damping liquid, and then adjusting and controlling the damping ratio of the entire TMD system, the change of the frequency of the main structure can be adapted. Since the damping ratio is completely determined by the liquid contact area of the plunger of the damper entering the hollow cylindrical shell of the damper, it is very convenient to debug the damping, and the damping force output can be accurately controlled within ±5%, which can ensure that the set frequency of the TMD is constant and can ensure that the TMD works efficiently. It can solve the problem that the TMD frequency and damping ratio cannot be actively adjusted when the frequency of the main structure drifts.

[0006] In order to achieve the above object, the utility model provides a kind of semi-active tuned mass damper system based on basin damper, including mass unit, adjustable spring unit, damping unit, guide unit and mounting base plate;Wherein,

[0007] The mass unit includes fixed mass component and free mass component;The fixed mass component includes the top plate and the intermediate plate arranged in parallel and spaced above the mounting base plate, and the guide unit mounting plate is respectively arranged on the opposite two ends of the top plate and the intermediate plate;The free mass component includes two free mass blocks arranged between the top plate and the intermediate plate;

[0008] The adjustable spring unit includes a plurality of detachable springs vertically arranged in parallel and spaced between the intermediate plate and the mounting base plate;

[0009] The damping unit is a basin damper;It includes a bottom end plate connected to the center of the mounting base plate, a hollow cylindrical shell vertically arranged on the bottom end plate, a plunger telescopically arranged in the center of the hollow cylindrical shell, and a top end plate arranged at the end of the plunger away from the bottom end plate;The top end plate is above the top plate;The top end plate and the top plate are fixed by evenly spaced fixed columns;The hollow cylindrical shell is provided with damping liquid inside;

[0010] The guide unit includes guide rods vertically arranged on the top of both ends of the mounting base plate respectively, and sliding members arranged on both ends of the top plate and the intermediate plate matched with the guide rods.

[0011] Further, the shape and size of the top plate and the intermediate plate are consistent, and the top plate and the intermediate plate are provided with accommodating grooves for the guide unit to pass through.

[0012] Further, the intermediate plate and the mounting base plate are respectively provided with mounting rings matched with both ends of the spring;

[0013] The number of mounting rings is more than the number of springs.

[0014] Further, the top plate is provided with a first via hole for the damping unit to pass through;

[0015] The intermediate plate is provided with a second via hole for the damping unit to pass through.

[0016] Further, the cross section of the top end plate is larger than the area of the first via hole;

[0017] The length of the plunger is greater than the distance between the top plate and the mounting base plate.

[0018] Further, the two free mass blocks are symmetrically arranged on both sides of the center line of the two guide rods.

[0019] Further, each free mass comprises several detachable steel plates arranged in a stack from bottom to top.

[0020] Further, the guide rod is a U-shaped groove structure; the U-shaped grooves of the two guide rods are oppositely arranged.

[0021] Further, the sliding member comprises two outer pulley fixing plates arranged in parallel and spaced apart on the outer side surface of the guide unit mounting plate, outer pulleys arranged on the outer pulley fixing plates, an inner pulley fixing plate arranged on the top of the guide unit mounting plate, and inner pulleys arranged on the end portions of the inner pulley fixing plate.

[0022] Further, the outer pulleys are attached to the outer surfaces of the two arms of the U-shaped groove of the guide rod.

[0023] The inner pulleys are attached to the inner bottom of the U-shaped groove of the guide rod.

[0024] Overall, compared with the prior art, the above technical scheme conceived by the utility model can achieve the following beneficial effects:

[0025] (1) The semi-active tuned mass damper system based on the pot damper of the utility model can generate inertia force in response to the vibration of the main structure when the main structure vibrates, thereby inhibiting the vibration of the main structure; at the same time, the viscous damper is used to absorb the energy transmitted from the main structure to the TMD, thereby limiting the movement displacement of the TMD; the damper unit of the utility model adopts the pot damper, which is not a traditional small-hole throttling type; the pot damper is designed in an open type, which can avoid the deformation damage and oil leakage problems often occurring in the piston damper; by controlling the depth of the plunger in the hollow cylindrical shell, the contact area of the plunger in the damping liquid is adjusted, and the damping ratio of the entire TMD system is adjusted and controlled, so as to adapt to the change of the frequency of the main structure; since the damping ratio is completely determined by the liquid contact area of the plunger of the damper into the hollow cylindrical shell of the damper, it is very convenient to debug the damping, the damping force output by the damper can be accurately controlled within a range of ± 5%, the set frequency of the TMD can be ensured to be constant, and the TMD can work efficiently; the utility model can adjust the frequency and damping ratio of the TMD according to the real-time state of the main structure, and can ensure that the TMD always plays the best effect under different environmental conditions; this semi-active adjustment mechanism enables the TMD to respond flexibly when the frequency of the main structure changes, and improves the vibration reduction effect.

[0026] (2) The utility model discloses a kind of semi-active tuned mass damper systems based on basin damper, since damper liquid is contained in basin structure, damper liquid can reliably work under different temperature (-10℃~+60℃), various humidity, various corrosive environment and various weather environment, so TMD damper can adapt to various different working environments of structure, damping constant is constant, can guarantee the reliability of work;The container containing damper liquid is basin, there is no pressure inside, so the damper of the utility model does not appear damper liquid leakage phenomenon, and the design of spring adopts the design of infinite life, so TMD system can work stably under long-term use condition, and its life is longer;

[0027] (3) The utility model discloses a kind of semi-active tuned mass damper systems based on basin damper of the utility model, damper, damper liquid, spring, mass block etc.

[0028] (4) The utility model discloses a kind of semi-active tuned mass damper systems based on basin damper of the utility model, multiple spring design and free mass block design are adopted;Not only can the frequency of TMD be adjusted by increasing or decreasing mass block, but also the installation space of spring is reserved, and the frequency of TMD can be adjusted by increasing or decreasing the number of spring;The stiffness of single spring is reduced by multiple spring design, and then the fatigue life of spring is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 For the structure schematic view of a kind of semi-active tuned mass damper systems based on basin damper of the utility model embodiment;

[0030] Fig. 2 For the structure schematic view of the sliding member of a kind of semi-active tuned mass damper systems based on basin damper of the utility model embodiment;

[0031] Fig. 3 For the bottom end plate installation position schematic view of the damper unit of a kind of semi-active tuned mass damper systems based on basin damper of the utility model embodiment;

[0032] Fig. 4 For the sectional structure schematic view of the damper unit of a kind of semi-active tuned mass damper systems based on basin damper of the utility model embodiment.

[0033] In all the drawings, the same reference signs refer to the same technical features, specifically: 1 - mass unit, 11 - fixed mass assembly, 111 - top plate, 112 - intermediate plate, 113 - guide unit mounting plate, 114 - accommodating groove, 115 - fixing column, 12 - free mass assembly, 2 - adjustable spring unit, 21 - spring, 22 - mounting ring, 3 - damping unit, 31 - bottom end plate, 32 - hollow columnar housing, 33 - plunger, 34 - top end plate, 35 - damping liquid, 4 - guide unit, 41 - guide rod, 42 - slider, 421 - outer pulley fixing plate, 422 - outer pulley, 423 - inner pulley fixing plate, 424 - inner pulley, 5 - mounting bottom plate, 51 - mounting plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as there is no conflict.

[0035] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to", "provided with" or "provided in" another element, it can be directly on another element or indirectly on another element. When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to another element; the terms "mounting", "connection", "connection", "provided with" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0036] In addition, the terms "first", "second" and the like are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0037] As Figs. 1-4As shown, one aspect of the utility model provides a kind of semi-active tuned mass damper system based on basin damper, including mass unit 1, adjustable spring unit 2, damping unit 3, guide unit 4 and installation bottom plate 5;The mass unit 1 includes fixed mass component 11 and free mass component 12;The fixed mass component 11 includes top plate 111 and intermediate plate 112 being arranged in parallel interval above installation bottom plate 5, and guide unit mounting plate 113 being respectively arranged in the opposite two ends of top plate 111 and intermediate plate 112;The free mass component 12 includes two free mass blocks being arranged between top plate 111 and intermediate plate 112;Each free mass block includes several detachable steel plates being stacked from bottom to top;The number of steel plates of free mass block can be increased or decreased, to fine tune the frequency of TMD;The adjustable spring unit 2 includes several detachable springs 21 being vertically arranged in parallel interval between the intermediate plate 112 and installation bottom plate 5;The stiffness and frequency of TMD are adjusted by increasing or decreasing the number of spring 21;The guide unit 4 includes guide rod 41 being vertically arranged in the top of both ends of installation bottom plate 5 respectively, and sliding member 42 being arranged in the both ends of top plate 111 and intermediate plate 112 and matched with guide rod 41 respectively;The damping unit 3 is basin damper;The basin damper includes bottom end plate 31 being connected with the center of installation bottom plate 5, hollow cylindrical shell 32 being vertically arranged on bottom end plate 31, plunger 33 being telescopically arranged in the center of hollow cylindrical shell 32, and top end plate 34 being arranged in the end of plunger 33 away from bottom end plate 31;The top end plate 34 is located above top plate 111;The top end plate 34 and top plate 111 are fixed by fixed column 115 being arranged in uniform interval;Damping liquid 35 is arranged in the inside of hollow cylindrical shell 32;By controlling the depth of plunger 33 in hollow cylindrical shell 32, the contact area of plunger 33 entering damping liquid 35 is adjusted, and then the damping ratio of entire TMD system is adjusted and controlled, so that tuned mass damper system adjusts damping ratio in real time according to the change of main structure frequency during TMD debugging and use process, ensure that TMD always works with maximum efficiency;The utility model adjusts the frequency and damping ratio of TMD according to the real-time state of main structure by semi-active control mode, on the one hand, ensure that it always plays the best effect under different environmental conditions, on the other hand, when facing the change of main structure frequency, provide higher flexibility and adaptability;It has important significance for improving the wind and earthquake resistance of large-span bridge and other structures, and protecting the safety and use function of structure.

[0038] Further, as Figs. 1-4As shown, the top plate 111 and the intermediate plate 112 are uniform in shape and size, and the top plate 111 and the intermediate plate 112 are provided with accommodating grooves 114 for the guide unit 4 to pass through; the intermediate plate 112 and the mounting bottom plate 5 are respectively provided with mounting rings 22 matched with both ends of the spring 21; the number of the mounting rings 22 is more than that of the spring 21; when the stiffness and frequency of the TMD need to be adjusted, the number of the spring 21 can be increased or decreased to achieve the adjustment.

[0039] Further, as shown in the drawings, Figs. 1-4 As shown, the top plate 111 is provided with a first through hole for the damping unit 3 to pass through; the intermediate plate 112 is provided with a second through hole for the damping unit 3 to pass through; the cross section of the top end plate 34 is larger than the area of the first through hole; the length of the plunger 33 is greater than the distance between the top plate 111 and the mounting bottom plate 5; the bottom end plate 31 and the top end plate 34 can be circular disc structures or square plate structures; the basin type damper of the utility model is a three-dimensional structure, and within a horizontal 360-degree range, no matter which direction the main structure vibrates, the damper can have a utilization rate of 100%.

[0040] Further, as shown in the drawings, Figs. 1-4 As shown, two free masses are symmetrically arranged on both sides of the center line of the two guide rods 41; the guide rod 41 is a U-shaped groove structure, and is connected with the mounting bottom plate 5 through the mounting plate 51; the U-shaped grooves of the two guide rods 41 are oppositely arranged; the sliding member 42 comprises two outer pulley fixed plates 421 arranged in parallel and spaced apart on the outer side surface of the guide unit mounting plate 113, an outer pulley 422 arranged on the outer pulley fixed plate 421, an inner pulley fixed plate 423 arranged on the top of the guide unit mounting plate 113, and an inner pulley 424 arranged on the end portion of the inner pulley fixed plate 423; the outer pulley 422 is attached to the outer surfaces of the two arms of the U-shaped groove of the guide rod 41; the inner pulley 424 is attached to the inner bottom of the U-shaped groove of the guide rod 41; during operation, with the extension and contraction of the plunger 33 in the hollow cylindrical shell 32, the outer pulley 422 and the inner pulley 424 are driven to slide up and down on the guide rod 41; the utility model ensures smooth movement of the TMD through the guide unit 4, and reduces the frictional damping of the TMD.

[0041] The utility model discloses a kind of TMDs, including hollow columnar shell 32, plunger 33, damping liquid 35 and control mechanism, the hollow columnar shell 32 is connected with plunger 33, and plunger 33 is connected with damping liquid 35, and control mechanism is connected with plunger 33.

[0042] Those skilled in the art will readily understand that the above description is only preferred embodiments of the present utility model, and is not intended to limit the present utility model, and any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A semi-active tuned mass damping system based on a pot damper, characterized by: It comprises a mass unit (1), an adjustable spring unit (2), a damping unit (3), a guide unit (4) and a mounting base plate (5); wherein, The mass unit (1) includes a fixed mass component (11) and a free mass component (12); the fixed mass component (11) includes a top plate (111) and a middle plate (112) arranged in parallel and spaced apart above a mounting base plate (5), and guide unit mounting plates (113) respectively provided at opposite ends of the top plate (111) and the middle plate (112); the free mass component (12) includes two free mass blocks provided between the top plate (111) and the middle plate (112); The adjustable spring unit (2) comprises a plurality of detachable springs (21) arranged vertically and in parallel and spaced relation between the intermediate plate (112) and the mounting base plate (5); The damping unit (3) is a pot-type damper, comprising a bottom end plate (31) connected to the center of the mounting base plate (5), a hollow cylindrical shell (32) vertically arranged on the bottom end plate (31), a plunger (33) telescopically arranged at the center of the hollow cylindrical shell (32), and a top end plate (34) arranged at an end of the plunger (33) away from the bottom end plate (31); the top end plate (34) is located above the top plate (111); the top end plate (34) and the top plate (111) are fixed by fixing columns (115) arranged at even intervals; a damping fluid (35) is provided inside the hollow cylindrical shell (32); The guide unit (4) comprises guide rods (41) respectively arranged vertically on the top of both ends of the mounting base plate (5), and sliding members (42) respectively arranged on both ends of the top plate (111) and the middle plate (112) and matched with the guide rods (41).

2. A semi-active tuned mass damping system based on a pot damper according to claim 1, characterized in that: The top plate (111) and the middle plate (112) have the same shape and size, and both the top plate (111) and the middle plate (112) are provided with a receiving groove (114) for the guide unit (4) to pass through.

3. The semi-active tuned mass damping system based on a pot damper according to claim 2, characterized in that: The intermediate plate (112) and the mounting base plate (5) are respectively provided with mounting rings (22) matching the two ends of the spring (21); The number of the mounting rings (22) is greater than the number of the springs (21).

4. The semi-active tuned mass damping system based on a pot damper according to claim 3, characterized in that: The top plate (111) is provided with a first through hole for the damping unit (3) to pass through; The middle plate (112) is provided with a second through hole for the damping unit (3) to pass through.

5. The semi-active tuned mass damping system based on a pot damper according to claim 4, characterized in that: The cross-section of the top end plate (34) is larger than the area of ​​the first through hole; The length of the plunger (33) is greater than the distance between the top plate (111) and the mounting base plate (5).

6. A semi-active tuned mass damping system based on a pot damper according to any one of claims 1 to 5, characterized in that: The two free mass blocks are symmetrically arranged on both sides of a line connecting the centers of the two guide rods (41).

7. A semi-active tuned mass damping system based on a pot damper according to any one of claims 1 to 5, characterized in that: Each free mass block includes a plurality of detachable steel plates stacked from bottom to top.

8. A semi-active tuned mass damping system based on a pot damper according to any one of claims 1 to 5, characterized in that: The guide rod (41) is a U-shaped groove structure; the U-shaped grooves of the two guide rods (41) are arranged opposite to each other.

9. The semi-active tuned mass damping system based on a pot damper according to claim 8, characterized in that: The sliding member (42) includes two outer pulley fixing plates (421) arranged in parallel and spaced apart on the outer side surface of the guide unit mounting plate (113), an outer pulley (422) arranged on the outer pulley fixing plates (421), an inner pulley fixing plate (423) arranged on the top of the guide unit mounting plate (113), and an inner pulley (424) arranged at the end of the inner pulley fixing plate (423).

10. The semi-active tuned mass damping system based on a pot damper according to claim 9, characterized in that: The outer pulley (422) is in contact with the outer surfaces of the two arms of the U-shaped groove of the guide rod (41); The inner pulley (424) is fitted with the inner bottom of the U-shaped groove of the guide rod (41).

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