One-way arc rail type pendulum-like tuned mass damper
By designing a unidirectional arc-track tuned mass damper, and utilizing the shuttle structure of the curved track and the mass block, the problems of large space requirements, poor stability, and low energy consumption efficiency in existing technologies are solved, achieving efficient vibration reduction and a wide tuning period.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TONGJI UNIV
- Filing Date
- 2023-09-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing tuned mass dampers have large space requirements, poor structural stability, low energy efficiency, and are prone to damage in multi-track configurations, making it difficult to achieve a wide range of tuning periods and high energy efficiency.
It adopts a unidirectional arc track structure, using a curved track to pass through the mass block. The mass block has curved channels inside. The surface of the curved track can be treated or covered with a damping layer. The mass block can self-reset and is fixed to the structure through the curved track. The connection has sufficient rigidity. Multiple mass blocks can distribute the mass to reduce construction difficulty.
It achieves stable installation in a limited space, improves stability and energy dissipation during vibration, and can tune vibration reduction at different frequencies, thus enhancing the vibration reduction effect of the device.
Smart Images
Figure CN117306729B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to tuned mass dampers, and more particularly to a unidirectional arc-rail type pendulum-like tuned mass damper. Background Technology
[0002] A tuned mass damper (TMD) typically consists of a mass, springs, and a damping system, used to alter the resonant characteristics of a structure to achieve vibration reduction. Currently, various pendulum-type tuned mass dampers exist, such as pendulum-type eddy current tuned mass damper devices and a low-frequency two-degree-of-freedom pendulum TMD vibration control device for tall structures disclosed in application publication number CN109296099A. However, these pendulum-type TMDs all require significant vertical space for the relatively long pendulum cables during operation, and the large concentrated mass poses risks and creates considerable difficulties in construction, especially in tall buildings where these drawbacks are more pronounced.
[0003] A search revealed that application publication number CN110056242A discloses a supported pendulum type bidirectional tuned mass damper, specifically comprising: a connecting plate, multiple sets of support track mechanisms mounted on the connecting plate, and an inertial mass block; the support track mechanism includes a second support track and a first support track fixed on the connecting plate, the second support track being movably mounted on the first support track, the inertial mass block being movably mounted on the second support track, the second support track moving along an arc-shaped trajectory on the first support track, and the inertial mass block moving along an arc-shaped trajectory on the second support track, wherein the two planes corresponding to the two arc-shaped trajectories are perpendicular to each other.
[0004] However, the multiple support tracks of this tuned mass damper increase the risk of the overall structure; if one track fails, the entire device will fail. The multi-track design requires a high track curvature, and forms with excessive curvature changes cannot be used. Due to its bidirectional control principle, the connection points are relatively weak in the non-working direction, making them prone to out-of-plane damage. The structure with multiple tracks stacked together has poor energy dissipation capacity.
[0005] Therefore, achieving structural stability, a wide range of adjustable tuning cycles, and high energy efficiency have become technical problems that need to be solved. Summary of the Invention
[0006] The purpose of this invention is to overcome the defects of the prior art and provide a unidirectional arc track type pendulum-like tuned mass damper.
[0007] The objective of this invention can be achieved through the following technical solutions:
[0008] According to one aspect of the present invention, a unidirectional arc-track type pendulum-like tuned mass damper is provided, comprising a concentrated mass portion and a curved track, wherein the curved track is a single-track structure, the concentrated mass portion includes a mass block, the mass block has a curved channel inside, the curved track passes through the mass block through the curved channel, and both ends are fixed to the structure to be damped.
[0009] As a preferred technical solution, the shape of the curved track gives the mass block on it a self-resetting property.
[0010] As a preferred technical solution, the curvature of the curved track is consistent throughout.
[0011] As a preferred technical solution, the curved track surface is surface treated or covered with a damping layer.
[0012] As a preferred technical solution, the mass block is a sphere or a mass block extending along a curved track.
[0013] As a preferred technical solution, a tuned mass damper is used, which is either the sphere or a mass block extending along the curved track direction, with a tuning period T. t for:
[0014]
[0015] Where t is time, Let g be the curvature function of the curved track at the location of the mass block, and g be the acceleration due to gravity.
[0016] As a preferred technical solution, the concentrated mass section further includes a buffer section.
[0017] As a preferred technical solution, the buffer part is made of laminated rubber, laminated lead plate or resin material.
[0018] As a preferred technical solution, there are at least two mass blocks, and the buffer is located between the mass blocks.
[0019] As a preferred technical solution, the number of mass blocks used in this tuned mass damper is inversely proportional to the mass of each mass block.
[0020] Compared with the prior art, the present invention has the following advantages:
[0021] 1) This invention uses a single curved track to replace the pendulum cable of the pendulum tuned mass damper. The structure is stable and effective, and can be directly installed on the top of the structure to be damped, saving a lot of space required for the long pendulum cable.
[0022] 2) This invention further improves the stability of the concentrated mass section during vibration through a shuttle structure in which a curved track passes through the mass block;
[0023] 3) The curvature of the curved track used in this invention can be adjusted at various points. The curved track with variable curvature causes the mass block to vibrate in a non-circular arc shape, thereby achieving special damping effects such as multi-frequency tuning.
[0024] 4) The curved track used in this invention is surface-treated or covered with a damping layer, which generates additional damping between the curved track and the concentrated mass part, such as viscous damping, frictional damping, etc., which improves the energy dissipation capacity of the device and enhances the shock absorption effect. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of a unidirectional arc-rail type pendulum-like tuned mass damper according to Embodiment 1 of the present invention;
[0026] Figure 2 This is a schematic diagram of the overall structure of a unidirectional arc-rail type pendulum-like tuned mass damper according to Embodiment 2 of the present invention;
[0027] Figure 3 This is a schematic diagram of the overall structure of a unidirectional arc-rail type pendulum-like tuned mass damper according to Embodiment 3 of the present invention;
[0028] Figure 1 As indicated by the index number:
[0029] 101. Mass block; 1010. Curved channel; 2. Curved track;
[0030] Figure 3 As indicated by the index number:
[0031] 1. Concentrated mass section; 202. Buffer section. Detailed Implementation
[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.
[0033] Example 1
[0034] like Figure 1 As shown, the present invention provides a unidirectional arc track type pendulum-like tuned mass damper, including a mass block 101 and a curved track 2.
[0035] The mass block 101 is a sphere with a curved channel 1010 inside. The curvature of the curved channel 1010 is the same as that of the curved track 2.
[0036] The uniform curvature of the curved track 2 and its overall shape give the mass block 101 self-resetting properties. The uniform curvature ensures the smooth operation of the tuned mass damper and makes it easy to determine and adjust the frequency of the concentrated mass vibration. The self-resetting property ensures the performance of the device. The curved track 2 passes through the mass block 101 via the curved channel 1010, forming a shuttle structure. The surface of the curved track 2 can be left untreated, surface treated, or covered with a damping layer to change the damping force between the concentrated mass part 1 and the curved track 2. A higher damping force can provide a larger driving force and enhance the energy dissipation performance of the tuned mass damper. The two ends of the curved track 2 are fixedly connected to the structure to be damped. The connection points must have sufficient stiffness and strength to prevent the tuned mass damper from failing.
[0037] Mass block 101 can repetitively and stably vibrate at a fixed frequency on the curved track 2 without colliding with it, absorbing and dissipating the energy input from the structure to be damped, thus achieving tuned vibration reduction. The direction indicated by the dashed arrow in the figure is the vibration direction of mass block 101, and L is the radius of the curved track 2.
[0038] The tuning period T of the unidirectional arc-track type pendulum-like tuned mass damper is:
[0039]
[0040] Where g is the acceleration due to gravity.
[0041] Example 2
[0042] like Figure 2 As shown, the present invention provides a unidirectional arc-track type pendulum-like tuned mass damper, including a mass block 101 and a curved track 22.
[0043] Mass block 101 is a mass block 101 extending along the direction of curved track 2, and has a curved channel 1010 inside, the curvature of which is the same as that of curved track 2.
[0044] The uniform curvature and overall shape of the curved track 2 give the mass block 101 self-resetting properties. The uniform curvature ensures the smooth operation of the tuned mass damper and makes it easy to determine and adjust the frequency of the concentrated mass vibration. The self-resetting property ensures the performance of the device. The curved track 2 passes through the mass block 101 via the curved channel 1010, forming a shuttle structure. The surface of the curved track 2 can be left untreated, surface treated, or covered with a damping layer to change the damping force between the concentrated mass and the curved track 2. A higher damping force can provide a larger driving force and enhance the energy dissipation performance of the tuned mass damper. The two ends of the curved track 2 are fixedly connected to the structure to be damped. The connection points must have sufficient stiffness and strength to prevent the tuned mass damper from failing.
[0045] Mass block 101 can repetitively and stably vibrate at a fixed frequency on the curved track 2 without colliding with it, absorbing and dissipating the energy input from the structure to be damped, thus achieving tuned vibration reduction. The direction indicated by the dashed arrow in the figure is the vibration direction of mass block 101, and L is the radius of the curved track 2.
[0046] The tuning period T of the unidirectional arc-track type pendulum-like tuned mass damper is:
[0047]
[0048] Where g is the acceleration due to gravity.
[0049] Example 3
[0050] like Figure 3 As shown, the present invention provides a unidirectional arc-track type pendulum-like tuned mass damper, including a concentrated mass part 1 and a curved track 2.
[0051] The concentrated mass section 1 includes mass blocks 101 and buffer sections 102. There are at least two mass blocks 101, and three are shown in the figure. The number of mass blocks 101 is inversely proportional to the mass of each mass block 101. By using multiple dispersed mass blocks 101, the mass of the concentrated mass section 1 can be distributed on the curved track 2, thereby reducing the construction difficulty. The mass blocks 101 have curved channels 1010 inside, and the curvature of the curved channels 1010 is the same as that of the curved track 2. The buffer sections 102 are located between the mass blocks 101 and are generally made of materials with good elasticity or ductility, such as laminated rubber, laminated lead plates, and resin materials. Laminated lead plates refer to multi-layer lead plate structures with rubber layers between the lead plates.
[0052] The consistent curvature and overall shape of the curved track 2 give the mass block 101 self-resetting properties. The consistent curvature ensures the proper operation of the tuned mass damper, and the self-resetting property ensures the performance of the device. The curved track 2 passes through the mass block 101 via the curved channel 1010, forming a shuttle structure. The surface of the curved track 2 may be left untreated, surface-treated, or covered with a damping layer to change the damping force between the concentrated mass part 1 and the curved track 2. A higher damping force can provide a larger driving force and enhance the energy dissipation performance of the tuned mass damper. The two ends of the curved track 2 are fixedly connected to the structure to be damped. The connection points must have sufficient stiffness and strength to prevent the tuned mass damper from failing.
[0053] Mass block 101 can repetitively and stably vibrate at a fixed frequency on the curved track 2 without colliding with it, absorbing and dissipating the energy input from the structure to be damped, thus achieving tuned vibration reduction. The direction indicated by the dashed arrow in the figure is the vibration direction of mass block 101, and L is the radius of the curved track 2.
[0054] The tuning period T of the unidirectional arc-track pendulum-like tuned mass damper was obtained through experimental simulation.
[0055] Example 4
[0056] The present invention provides a unidirectional arc track type pendulum-like tuned mass damper, including a concentrated mass part 1 and a curved track 2.
[0057] The concentrated mass section 1 may consist only of mass block 101, or it may consist of mass block 101 and buffer section 102. If it includes mass block 101 and buffer section 102, then there are at least two mass blocks 101. The number of mass blocks 101 is inversely proportional to the mass of each mass block 101. By using multiple dispersed mass blocks 101, the mass of the concentrated mass section 1 can be distributed on the curved track 2, thereby reducing the construction difficulty. The buffer section 102 is located between the mass blocks 101 and is generally made of ductile materials such as laminated rubber, laminated lead plate, and resin. The mass block 101 has a curved channel 1010 inside. The curved track 2 passes through the mass block 101 through the curved channel 1010 to form a shuttle structure. The shape of the curved channel 1010 is not exactly the same as that of the curved track 2, and there is a certain amount of redundant space between them.
[0058] The curvature of the curved track 2 can be set according to requirements to achieve a non-circular vibration trajectory, so as to determine and adjust the frequency of the concentrated mass vibration. The overall shape of the curved track 2 gives the mass block 101 self-resetting property, which can ensure the performance of the device. The surface of the curved track 2 can be left untreated or surface-treated or covered with a damping layer to change the damping force between the concentrated mass part 1 and the curved track 2. A higher damping force can provide a larger driving force and enhance the energy dissipation performance of the tuned mass damper. The two ends of the curved track 2 are fixed to the structure to be vibration damped. The connection points must have sufficient stiffness and strength to prevent the tuned mass damper from failing.
[0059] Mass block 101 can repeatedly and stably vibrate at a fixed frequency on curved track 2, absorbing and dissipating the energy input from the structure to be damped, thus achieving tuned vibration reduction.
[0060] The design employs a concentrated mass portion 1 consisting only of mass block 101, with a central arc trajectory of elastic tuning frequency and two side arc trajectories of elasto-plastic tuning frequencies, connected smoothly by a curved track 2 via a buffer curve. This is a special vibration reduction mode, such as elasto-plastic tuning under large earthquakes, which can meet performance control requirements. Elastic tuning is performed at small displacements, and elasto-plastic tuning at large displacements. Setting different curvatures at different positions on the curved track 2 allows for multi-frequency tuning that varies with displacement. The time-varying tuning period T of this tuning mass damper... t for:
[0061]
[0062] Where t is time, Let g be the curvature function of the location of the mass block, and g be the acceleration due to gravity.
[0063] The aforementioned tuning refers to distributing the energy input to the main structure (the structure to be damped) through similar vibration periods. Tuning in the elastic state is achieved by adjusting the period of the tuned mass damper to be close to the fundamental frequency of the main structure. However, once the main structure enters an elastoplastic failure state, its stiffness degrades, and its natural period changes accordingly. This change only exists in the elastoplastic large displacement state. Therefore, this tuned mass damper uses a curved track 2 with different curvatures to transform its own period in the large displacement state, making the period of the tuned mass damper close to that of the elastoplastic main structure, thus enabling elastoplastic tuning.
[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A unidirectional arc-rail type pendulum-like tuned mass damper, characterized in that, It includes a concentrated mass part (1) and a curved track (2). The curved track (2) is a single track structure. The concentrated mass part (1) includes a mass block (101). The mass block (101) has a curved channel (1010) inside. The curved track (2) passes through the mass block (101) through the curved channel (1010) and is fixed at both ends to the structure to be vibration-damped. The curvature of the curved track (2) is consistent everywhere.
2. The unidirectional arc-rail type pendulum-like tuned mass damper according to claim 1, characterized in that, The shape of the curved track (2) gives the mass block (101) on it self-resetting properties.
3. A unidirectional arc-rail type pendulum-like tuned mass damper according to claim 1, characterized in that, The surface of the curved track (2) is surface treated or covered with a damping layer.
4. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 1, characterized in that, The mass block (101) is a sphere or a mass block (101) extending along the curved track (2).
5. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 4, characterized in that, A tuned mass damper employing the sphere or a mass block (101) extending along the curved track (2) has a tuning period of... for: ， in, For time, Let be the curvature function of the curved track (2) at the location of the mass block. This is the acceleration due to gravity.
6. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 1, characterized in that, The concentrated mass section (1) also includes a buffer section (202).
7. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 6, characterized in that, The buffer part (202) is made of laminated rubber, laminated lead plate or resin material.
8. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 6, characterized in that, There are at least two mass blocks (101), and the buffer (202) is located between the mass blocks (101).
9. A unidirectional arc-track type pendulum-like tuned mass damper according to claim 8, characterized in that, The number of mass blocks (101) used in the tuned mass damper is inversely proportional to the mass of each mass block (101).