A multi-biased inertial capacitive friction pendulum tuned mass damper

Abstract

This invention provides a multi-biased inertial-capacitance friction pendulum tuned mass damper, comprising multiple friction pendulum tuned mass damper units. Each friction pendulum tuned mass damper unit includes a friction pendulum support, a sliding pad, an upper pendulum support, and a mass block. The sliding pad is disposed on the friction pendulum support and is offset at the center of the friction pendulum support, with the sliding pad and the friction pendulum support in sliding engagement. The upper pendulum support is disposed on the sliding pad and is offset at the center of the sliding pad, with the upper pendulum support and the sliding pad in sliding engagement. The mass block is fixedly disposed on the upper pendulum support. The curvature radii of curvature of each friction pendulum support are different. An elastic stiffness element and an inertial-capacitance element are respectively connected between each pair of adjacent mass blocks. This multi-biased inertial-capacitance friction pendulum tuned mass damper simultaneously provides the effects of high sensitivity to vibration, multiple frequency control, amplification of energy-absorbing mass, and adaptive vibration reduction and energy dissipation.

Description

Technical Field

[0001] This invention relates to the field of damper technology, and in particular to a multi-biased inertial capacitive friction pendulum tuned mass damper. Background Technology

[0002] Friction pendulum tuned mass dampers have advantages such as providing stable and unique tuning efficiency (rigid-elastic stage) based on the pendulum track radius regardless of changes in the mass block, relying on friction energy dissipation without the need for additional dampers to provide damping energy dissipation, and being easy to maintain. Therefore, they are widely used in engineering structures.

[0003] However, in practical engineering, the frictional force of existing friction pendulum tuned mass dampers does not directly provide damping and energy dissipation as one might expect. Instead, the virtual inertial force transmitted by the structure needs to overcome the static friction of the mass block in the initial stage of motion before further frictional energy dissipation can occur. This results in existing friction pendulum tuned mass dampers being insensitive to vibration and exhibiting a delayed response in providing frictional energy dissipation, amplifying the structural response when vibrations are relatively small. Furthermore, when the structural frequency changes due to internal mass variations or the entry of some components into elastoplastic conditions, the existing friction pendulum tuned mass dampers, which provide a constant tuning efficiency, will fail to provide the optimal vibration control efficiency for the corresponding stage. In fact, when the tuning frequency deviates significantly from the first fixed frequency of the real-time structure, it may amplify structural vibrations and worsen the structural health. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-biased inertial capacitive friction pendulum tuned mass damper, which simultaneously provides the effects of high sensitivity to vibration, multiple frequency control, amplified energy-absorbing mass, and adaptive vibration reduction and energy dissipation.

[0005] This invention provides a multi-biased inertial-capacitive friction pendulum tuned mass damper, comprising multiple friction pendulum tuned mass damper units. Each friction pendulum tuned mass damper unit includes a friction pendulum support, a sliding pad, an upper pendulum support, and a mass block. The sliding pad is disposed on the friction pendulum support and is biased towards the center of the friction pendulum support, and the sliding pad is in sliding engagement with the friction pendulum support. The upper pendulum support is disposed on the sliding pad and is biased towards the center of the sliding pad, and the upper pendulum support is in sliding engagement with the sliding pad. The mass block is fixedly disposed on the upper pendulum support. The radius of curvature of each friction pendulum support is different. An elastic stiffness element and an inertial-capacitive element are respectively connected between each pair of adjacent mass blocks.

[0006] According to the present invention, a multi-biased inertial-capacitive friction pendulum tuned mass damper includes an inertial-capacitive element comprising a rack, a driving gear, a driven gear, and a support connector. The rack is horizontally arranged, one end of which is fixedly connected to one of the mass blocks, and the other end of which is meshed with the driving gear. The driving gear is meshed with the driven gear, and the driving gear and the driven gear are respectively mounted on one end of the support connector. The other end of the support connector is connected to another mass block.

[0007] According to the present invention, a multi-biased inertial-capacitive friction pendulum tuned mass damper includes a supporting connector comprising a connecting rod, a first supporting rod, and a second supporting rod. The connecting rod is arranged horizontally, one end of which is connected to the mass block, and the other end of which is connected to the first supporting rod and the second supporting rod, respectively. The driving gear is mounted on the first supporting rod, and the driven gear is mounted on the second supporting rod.

[0008] According to the present invention, a multi-biased inertial capacitive friction pendulum tuned mass damper is provided, wherein the oscillation period of each of the friction pendulum tuned mass damper units is different.

[0009] According to the present invention, a multi-biased inertial capacitance friction pendulum tuned mass damper has the following characteristics: the upper surface of the friction pendulum support is an upper arc-shaped sliding friction surface, and the lower surface of the sliding pad is a lower arc-shaped pad friction surface adapted to the upper arc-shaped sliding friction surface; the lower surface of the upper pendulum support is a lower arc-shaped sliding friction surface, and the upper surface of the sliding pad is an upper arc-shaped pad friction surface adapted to the lower arc-shaped sliding friction surface; the lower surface of the sliding pad slides in engagement with the upper surface of the friction pendulum support, and the upper surface of the sliding pad slides in engagement with the lower surface of the upper pendulum support, so that each individual friction pendulum tuned mass damper unit has a uniform tuning period.

[0010] According to the present invention, a multi-biased inertial capacitive friction pendulum tuned mass damper is provided, wherein the upper arc-shaped sliding friction surface, the lower arc-shaped sliding friction surface, the lower arc-shaped pad friction surface and the upper arc-shaped pad friction surface are respectively provided with friction layers, and the friction layers are made of friction materials with stable performance friction coefficients.

[0011] According to the present invention, a multi-biased inertial capacitive friction pendulum tuned mass damper is provided with limiting blocks at the left and right edges of the friction pendulum support for limiting the sliding distance of the sliding pad.

[0012] According to the present invention, a multi-biased inertial capacitive friction pendulum tuned mass damper is provided, wherein the elastic stiffness element is a spring element or an elastic steel element.

[0013] According to the present invention, a multi-biased inertial capacitive friction pendulum tuned mass damper is provided, wherein the installation sites of each friction pendulum tuned mass damper unit can be distributed in multiple layers of the structure or at multiple points in the structure.

[0014] The present invention provides a multi-biased inertial-capacitance friction pendulum tuned mass damper, comprising multiple friction pendulum tuned mass damper units. Each friction pendulum tuned mass damper unit includes a friction pendulum support, a sliding pad, an upper pendulum support, and a mass block. The sliding pad is disposed on the friction pendulum support and is biased towards the center of the friction pendulum support, with the sliding pad slidingly engaging with the friction pendulum support. The upper pendulum support is disposed on the sliding pad and is biased towards the center of the sliding pad, with the upper pendulum support slidingly engaging with the sliding pad. The mass block is fixedly disposed on the upper pendulum support. The curvature radius of each friction pendulum support is different. An elastic stiffness element and an inertial-capacitance element are respectively connected between each pair of adjacent mass blocks. That is, multi-modal control of the structure is achieved by setting multiple friction pendulum supports with different curvature radii, and by connecting adjacent mass blocks respectively... By connecting elastic stiffness elements and inertial capacitance elements, the relative acceleration generated by the asynchronous motion between multiple mass blocks is fully utilized to absorb energy and produce an amplified mass effect, which can significantly reduce the actual physical mass of the mass blocks required. The sliding pad is offset at the center of the friction pendulum support, and the upper pendulum support is offset at the center of the sliding pad. Thus, the relative position of the mass blocks on the friction pendulum support is set through multiple offsets. The advantages of static friction are fully utilized to compensate for the defect of the tuned mass damper in sensitivity to vibration, so that the mass blocks have the ability to be sensitive to reciprocating vibrations of arbitrary amplitude. By reasonably setting elastic stiffness elements and inertial capacitance elements between adjacent mass blocks, vibration energy can be mutually stored and transferred between the mass blocks and the inertial capacitance elements, which can achieve the function of extending the vibration duration of the mass blocks and suppressing vibration energy in the entire frequency domain during the vibration duration. Therefore, the multi-biased inertial capacitive friction pendulum tuned mass damper provided by this invention breaks through the constraints of traditional friction pendulum dampers that provide a single tuning frequency for the structure and have a sluggish energy dissipation response. It simultaneously provides the effects of high sensitivity to vibration, multiple frequency control, amplified energy-absorbing mass, and adaptive vibration reduction and energy dissipation, thereby providing stable, continuous, and excellent vibration reduction and energy dissipation effects for structures under different environmental loads. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the multi-biased inertial capacitive friction pendulum tuned mass damper of the present invention;

[0017] Figure 2 This is a schematic diagram of the inertial capacitive element in the multi-biased inertial capacitive friction pendulum tuned mass damper of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Installation site; 2. Friction pendulum support; 201. Upper arc-shaped sliding friction surface; 3. Sliding pad; 301. Lower arc-shaped pad friction surface; 302. Upper arc-shaped pad friction surface; 4. Upper pendulum support; 401. Lower arc-shaped sliding friction surface; 5. Mass block; 6. Elastic stiffness element; 7. Inertia-capacity element; 8. Limiting block; 9. Rack; 10. Driving gear; 11. Driven gear; 12. Support connector. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figure 1 As shown, the multi-biased inertial-capacitive friction pendulum tuned mass damper of this embodiment includes multiple friction pendulum tuned mass damper units. Each friction pendulum tuned mass damper unit includes a friction pendulum support 2, a sliding pad 3, an upper pendulum support 4, and a mass block 5. The sliding pad 3 is disposed on the friction pendulum support 2 and is biased at the center of the friction pendulum support 2, with the sliding pad 3 and the friction pendulum support 2 in sliding engagement. The upper pendulum support 4 is disposed on the sliding pad 3 and is biased at the center of the sliding pad 3, with the upper pendulum support 4 and the sliding pad 3 in sliding engagement. The mass block 5 is fixedly disposed on the upper pendulum support 4. The radius of curvature of each friction pendulum support 2 is different, and an elastic stiffness element 6 and an inertial-capacitive element 7 are respectively connected between each pair of adjacent mass blocks 5.

[0024] In other words, the multi-biased inertial-capacitive friction pendulum tuned mass damper of this invention achieves multi-modal structural control by setting multiple friction pendulum supports 2 with different radii of curvature. By connecting two adjacent mass blocks 5 with elastic stiffness elements 6 and inertial-capacitive elements 7 respectively, the relative acceleration generated by the asynchronous motion between multiple mass blocks 5 is fully utilized to absorb energy and generate an amplified mass effect, which can significantly reduce the actual physical mass of the mass blocks required. By setting the friction pendulum support 2, sliding pad 3, and upper pendulum support 4, the relative positions of the mass blocks 5 on the friction pendulum support 2 are set in a multi-biased manner, thereby making full use of the advantages of static friction to compensate for the defect of the tuned mass damper being insensitive to vibration, so that the mass blocks 5 have the ability to be sensitive to reciprocating vibrations of arbitrary amplitude. By reasonably setting the elastic stiffness element 6 and inertial-capacitive element 7 between adjacent mass blocks 5, vibration energy can also be mutually stored and transferred between the mass blocks 5 and the inertial-capacitive element 7, which can achieve the function of extending the vibration duration of the mass blocks and significantly suppressing the vibration energy in the entire frequency domain during the vibration duration.

[0025] Therefore, the multi-biased inertial capacitive friction pendulum tuned mass damper of the present invention breaks through the constraints of traditional friction pendulum dampers that provide a single tuning frequency for the structure and have a sluggish energy dissipation response. It simultaneously provides the effects of high sensitivity to vibration, multiple frequency control, amplified energy-absorbing mass, and adaptive vibration reduction and energy dissipation, thereby providing stable, continuous, and excellent vibration reduction and energy dissipation effects for structures under different environmental loads.

[0026] Specifically, the radius of curvature of the friction pendulum support 2 in each friction pendulum tuned mass damper unit needs to be determined according to the structural requirements and actual design needs, so that each friction pendulum support 2 has a specific radius of curvature. That is, in actual use, the radius of curvature of each friction pendulum support 2 needs to be provided according to the desired structural modal period.

[0027] Specifically, while the components of each friction pendulum tuned mass damper unit have the same function, the different radii of the pendulum support 2, sliding pad 3, and upper pendulum support 4 result in different tuning frequencies for each unit. Based on the period calculation of the pendulum system, the friction pendulum tuned mass damper unit with a larger radii of oscillation has a longer tuning period.

[0028] It should be noted that, in the embodiments of the present invention, the number of friction pendulum tuned mass damper units and the specific tuning period of each friction pendulum tuned mass damper unit need to be determined according to the structure and actual design requirements.

[0029] like Figure 1 As shown, in one specific embodiment, the multi-biased inertial capacitive friction pendulum tuned mass damper includes three friction pendulum tuned mass damper units, which are arranged sequentially at intervals along the horizontal direction. These three friction pendulum tuned mass damper units are defined from left to right as the first, second, and third friction pendulum tuned mass damper units. In the first friction pendulum tuned mass damper unit, the offset distance of the mass block 5 relative to the center of the friction pendulum support 2 is D1, and the radius of curvature of the friction pendulum support 2 is R1. In the second friction pendulum tuned mass damper unit, the offset distance of the mass block 5 relative to the center of the friction pendulum support 2 is D2, and the radius of curvature of the friction pendulum support 2 is R2. In the third friction pendulum tuned mass damper unit, the offset distance of the mass block 5 relative to the center of the friction pendulum support 2 is D3, and the radius of curvature of the friction pendulum support 2 is R3. (See attached...) Figure 1It can be seen that each mass block 5 has a different offset distance, and each friction pendulum support 2 has a different radius of curvature.

[0030] Of course, it should be noted that in practical applications, the installation sites 1 of each friction pendulum tuned mass damper unit can be distributed in multiple layers of the structure or multiple locations in the structure, and are not necessarily placed on the same layer or in close proximity.

[0031] like Figure 1 and 2 As shown, in some embodiments of the present invention, the inertial capacitive element 7 can be a rack and pinion type inertial capacitive element. This inertial capacitive element 7 includes a rack 9, a driving gear 10, a driven gear 11, and a support connector 12. The rack 9 is horizontally arranged, with one end of the rack 9 fixedly connected to one of the mass blocks 5, and the other end of the rack 9 meshing with the driving gear 10. The driving gear 10 meshes with the driven gear 11. The driving gear 10 and the driven gear 11 are respectively mounted on one end of the support connector 12, and the other end of the support connector 12 is connected to another mass block 5. By using a rack and pinion type inertial capacitive element to connect adjacent mass blocks 5, the asynchronous movement between the mass blocks 5 can drive the rack 9 and the driving gear 10 to mesh and operate, while the driving gear 10 drives the driven gear 11 to operate, achieving mass amplification and energy absorption effects.

[0032] Specifically, the support connector 12 includes a connecting rod, a first support rod, and a second support rod. The connecting rod is horizontally oriented, with one end connected to the mass block 5 and the other end connected to both the first and second support rods. The driving gear 10 is mounted on the first support rod, and the driven gear 11 is mounted on the second support rod. This structural form of the support connector 12 enables reliable installation of the driving gear 10 and the driven gear 11.

[0033] The rack 9 can be fixedly connected to the mass block 5 by bolts or by welding, so as to ensure that the rack 9 and the mass block 5 can meet the structural strength requirements after being fixedly connected.

[0034] The support connector 12 can be fixedly connected to the mass block 5 by bolts or by welding, thereby ensuring that the support connector 12 and the mass block 5 can meet the structural strength requirements after being fixedly connected.

[0035] In some embodiments of the present invention, in a single friction pendulum tuned mass damper unit, the upper surface of the friction pendulum support 2 is an upper arc-shaped sliding friction surface 201, and the lower surface of the sliding pad 3 is a lower arc-shaped pad friction surface 301 adapted to the upper arc-shaped sliding friction surface 201. The lower surface of the upper pendulum support 4 is a lower arc-shaped sliding friction surface 401, and the upper surface of the sliding pad 3 is an upper arc-shaped pad friction surface 302 adapted to the lower arc-shaped sliding friction surface 401. The lower surface of the sliding pad 3 slides in contact with the upper surface of the friction pendulum support 2, and the upper surface of the sliding pad 3 slides in contact with the lower surface of the upper pendulum support 4, so that the single friction pendulum tuned mass damper unit has a uniform tuning period. However, since the radii of curvature of the upper surfaces of each friction pendulum support 2 are different, the oscillation periods of each friction pendulum tuned mass damper unit are different.

[0036] In a single friction pendulum tuned mass damper unit, since the sliding pad 3 and the upper pendulum support 4 have initial displacements that are offset from the bottom center of the friction pendulum support 2, the sliding pad 3 and the upper pendulum support 4 are offset in a static state, thereby realizing multiple offset settings of the relative position of the mass block 5 on the friction pendulum support 2.

[0037] In a specific embodiment of the present invention, friction layers are respectively provided on the upper arc-shaped sliding friction surface 201 of the friction pendulum support 2, the lower arc-shaped sliding friction surface 401 of the upper pendulum support 4, and the lower arc-shaped pad friction surface 301 and the upper arc-shaped pad friction surface 302 of the sliding pad 3. The friction layers can be made of friction materials with stable friction coefficients, such as polytetrafluoroethylene, modified polytetrafluoroethylene, or polymer materials.

[0038] In a specific embodiment of the present invention, the mass block 5 can be constructed from concrete, a full water tank, or a rooftop garden, depending on actual usage requirements. It should be noted that the tuning period of a mass block constructed using a rooftop garden will not shift due to changes in mass.

[0039] In a specific embodiment of the present invention, the elastic stiffness element 6 may be a spring element or an elastic steel element with good restoring force, depending on actual usage requirements.

[0040] In some embodiments of the present invention, limiting blocks 8 are provided on the left and right edges of the friction pendulum support 2 to limit the sliding distance of the sliding pad 3, so as to prevent the swing distance from being too large.

[0041] In summary, the multi-biased inertial-capacitance friction pendulum tuned mass damper of this invention ensures excellent vibration reduction capabilities at various excitation frequencies, further enhancing the performance of the damper in engineering applications. The multi-biased inertial-capacitance friction pendulum tuned mass damper of this invention can generate multiple corresponding cycles of tuning energy dissipation capabilities, providing vibration reduction and energy dissipation capabilities for multiple structural vibration modes, significantly reducing various structural responses. Furthermore, by rationally arranging the bias ranges of each sliding pad 3 and each upper pendulum support 4, the potential advantages of friction can be fully utilized to achieve high sensitivity of the tuned mass damper to vibration, eliminating the sluggish response of traditional tuned mass dampers. By setting spring stiffness elements 6 and inertial capacitance elements 7 between the mass blocks 5 of each friction pendulum tuned mass damper unit, the asynchronous motion of each friction pendulum tuned mass damper unit can be fully utilized, providing a longer-lasting tuning energy dissipation effect and ensuring that each friction pendulum tuned mass damper unit remains in an biased state after the motion ends. This gives the multi-biased inertial capacitance friction pendulum tuned mass damper the advantage of being sensitive to repeated vibrations without limit.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multiple biasing MEMS-tuned mass damper, characterized by, The friction pendulum tuned mass damper unit comprises a friction pendulum support, a sliding pad, an upper pendulum support and a mass block, the sliding pad is arranged on the friction pendulum support and is offset from the center of the bottom of the friction pendulum support, and the sliding pad and the friction pendulum support are in sliding fit; the upper pendulum support is arranged on the sliding pad and is offset from the center of the sliding pad, and the upper pendulum support and the sliding pad are in sliding fit; and the mass block is fixedly arranged on the upper pendulum support. The curvature radius of each friction pendulum support is different, and the swing period of each friction pendulum tuned mass damper unit is different. An elastic stiffness element and an inerter element are respectively connected between each two adjacent mass blocks; the elastic stiffness element is a spring element or an elastic steel element. The inerter element comprises a rack, a driving gear, a driven gear and a support connecting piece, the rack is arranged horizontally, one end of the rack is connected with one of the mass blocks, the other end of the rack is in meshing connection with the driving gear, the driving gear is in meshing connection with the driven gear, the driving gear and the driven gear are respectively installed on one end of the support connecting piece, and the other end of the support connecting piece is connected with the other mass block. The support connecting piece comprises a connecting rod, a first support rod and a second support rod, the connecting rod is arranged horizontally, one end of the connecting rod is connected with the mass block, the other end of the connecting rod is connected with the first support rod and the second support rod respectively, the driving gear is installed on the first support rod, and the driven gear is installed on the second support rod. In a single friction pendulum tuned mass damper unit, the sliding pad and the upper pendulum support have initial displacements offset from the center of the bottom of the friction pendulum support, so that the offset arrangement of the sliding pad and the upper pendulum support is realized in the static state, and the multiple offset arrangement of the relative position of the mass block on the friction pendulum support is realized.

2. The multiple biasing C-M friction pendulum tuned mass damper of claim 1, wherein, The upper surface of the friction pendulum support is an upper arc-shaped sliding friction surface, and the lower surface of the sliding pad is a lower arc-shaped pad friction surface matched with the upper arc-shaped sliding friction surface. The lower surface of the upper pendulum support is a lower arc-shaped sliding friction surface, and the upper surface of the sliding pad is an upper arc-shaped pad friction surface matched with the lower arc-shaped sliding friction surface; the lower surface of the sliding pad is in sliding fit with the upper surface of the friction pendulum support, and the upper surface of the sliding pad is in sliding fit with the lower surface of the upper pendulum support, so that the single friction pendulum tuned mass damper unit has a unified tuning period.

3. The multiple biasing C-M friction pendulum tuned mass damper of claim 2, wherein, A friction layer is arranged on each of the upper arc-shaped sliding friction surface, the lower arc-shaped sliding friction surface, the lower arc-shaped pad friction surface and the upper arc-shaped pad friction surface, and the friction layer is made of a friction material with stable performance.

4. The multiple biasing C-M friction pendulum tuned mass damper of claim 1, wherein, Limiting blocks for limiting the sliding distance of the sliding pad are arranged at the left and right side edges of the friction pendulum support.

5. The multiple biasing MEMS-tuned mass damper according to any one of claims 1 to 4, characterized in that, The installation sites of the respective friction pendulum tuned mass damper units can be distributed in multiple stories of the structure or multiple locations of the structure.

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