Bidirectional rolling pendulum type tuned mass damper
By using a bidirectional rolling pendulum tuned mass damper, combined with friction and eddy current damping, the problems of high vertical space requirements and limited energy dissipation capacity of traditional TMDs in highly flexible structures are solved, achieving efficient bidirectional vibration reduction and self-resetting capability.
Patent Information
- Application Number
- CN202520165519.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Traditional tuned mass dampers (TMDs) have high vertical space requirements in highly flexible structures. Friction pendulum TMDs have limited energy dissipation capacity under heavy loads and require additional stiffness elements and viscous fluid dampers, which pose a risk of liquid leakage.
A bidirectional rolling pendulum tuned mass damper is adopted, which utilizes the inertial mass slider to slide within the concave spherical surface at the top of the sliding support. Combined with friction and eddy current damping, the stiffness is provided by the gravitational restoring force of the inertial mass slider, eliminating the need for additional stiffness components. The damping magnitude is adjusted by setting ball guide rails and permanent magnet components inside the sliding support.
It effectively solves the problem of vertical space occupation, improves the energy dissipation capacity of the damper, provides excellent bidirectional vibration reduction effect, simplifies the structure and reduces the need for additional stiffness components, and achieves self-resetting capability.
Smart Images
Figure CN223853594U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ocean engineering and structure damping control equipment technical field especially relates to a two -way rolling pendulum type tuned mass damper. BACKGROUND
[0002] Wind energy is renewable, clean and abundant, and has developed rapidly in recent years. With the progress of wind power technology, the single machine capacity and tower height are increasing. In addition, the wind turbine operates in a complex environment, and is affected by the combined action of wind, wave, flow and other dynamic loads. Its structural safety and fatigue problem is increasingly prominent, and it also affects the normal operation of the wind turbine generator, aggravates the fatigue load of each part and shortens the service life.
[0003] The installation of the vibration control system can effectively reduce the dynamic response of the structure, reduce the damage of the component and enhance the disaster resistance. Studies have shown that the tuned mass damper (TMD) has a significant damping effect on structural wind vibration and earthquake. TMD does not rely on external energy operation, and absorbs and transmits vibration energy from the structure through the coordinated action of mass, stiffness and damping elements.
[0004] Traditional TMD usually needs additional stiffness elements (such as springs, tracks, etc.), and relies on viscous fluid damper to dissipate energy. Not only the mechanical connection is complex, but also there is a risk of liquid leakage. Compared with the traditional TMD, the pendulum TMD can provide restoring stiffness through gravity, saving stiffness elements, but it has a high demand for vertical space. High-soft structure often needs to occupy too much vertical space. The friction pendulum TMD constructed by combining the friction pendulum vibration isolation support and the TMD effectively solves the problem of too much vertical space occupation of the pendulum TMD, but its energy dissipation capacity improved by friction damping is limited under large load environment, and increasing damping force needs to increase the mass block, thereby affecting the sensitivity of the damper. UTILITY MODEL CONTENTS
[0005] The utility model aims at solving the technical problems raised in the above background.
[0006] The utility model adopts the following technical scheme: a two-way rolling pendulum type tuned mass damper, comprising:
[0007] The inertia mass slider is provided with a ring-shaped conductor plate;
[0008] The sliding support is installed below the inertia mass slider;
[0009] The sliding support is internally provided with a ball guide rail and a permanent magnet assembly;
[0010] The limiting and mounting base is located below the inertia mass slider and fixedly connected to the controlled structure;
[0011] The bottom of the inertial mass slider is provided with a first arc structure, the top of the sliding support is provided with a second arc structure consistent with the curvature of the first arc structure, the bottom of the inertial mass slider is provided with an annular conductor plate, and the top of the sliding support is provided with a ball guide rail and a permanent magnet assembly.
[0012] Further, the annular conductor plate is made of brass or red copper, and the curvature of the annular conductor plate is consistent with the bottom of the inertial mass slider.
[0013] Further, the permanent magnet assembly needs to have a certain compressive strength, and the curvature is consistent with the top of the sliding support.
[0014] Further, the permanent magnet assembly and the inertial mass slider have a certain magnetic attraction force, which can further enhance the gravity restoring force stiffness of the damper.
[0015] Further, the ball guide rail needs to have sufficient bearing capacity to support the sliding of the inertial mass slider in the top concave spherical surface thereof, and the balls in the ball guide rail are made of steel material with high hardness and wear resistance, and the number thereof is designed according to actual requirements.
[0016] Further, the permanent magnet assembly and the balls in the ball guide rail are fixedly arranged in the sliding support, so that the magnetic attraction force between the two can be effectively avoided.
[0017] Further, when the bidirectional rolling pendulum tuned mass damper is in the balance position, the lower non-annular conductor plate region of the inertial mass slider is in contact with the ball guide rail, so that the wear of the annular conductor plate by the balls due to the pressure weight is reduced.
[0018] Further, a limiting and mounting base is provided with a limiting buffer rubber pad, so as to prevent the inertial mass slider from sliding out of the concave spherical surface of the sliding support.
[0019] Further, the bidirectional rolling pendulum tuned mass damper has a self-resetting capability, and after the vibration control is completed, the inertial mass slider is restored to the balance position by gravity.
[0020] Further, the bidirectional rolling pendulum tuned mass damper has excellent energy dissipation capability, and can dissipate energy through friction and eddy current damping.
[0021] Compared with the prior art, the bidirectional rolling pendulum tuned mass damper has the advantages and positive effects that:
[0022] 1. In the utility model, firstly, the inertial mass slider is supported through the sliding support and slides in the concave spherical surface at the top, avoids the vertical installation space needed when the mass block is suspended, and the structure is simple and economical.
[0023] 2. The utility model provides two kinds of damping dissipation mechanisms for the TMD system, one is the friction damping when the inertial mass slider with the annular conductor plate slides in the concave spherical surface at the top of the sliding support, and the other is the eddy current damping between the permanent magnet and the conductor plate;The effective combination of the two energy dissipation mechanisms greatly improves the energy dissipation capacity of the damper, effectively solves the problems of limited friction damping energy dissipation capacity of the friction pendulum TMD under large load disturbance and insufficient damping force of the eddy current damping under small speed and large displacement.
[0024] 3. In addition, the bidirectional rolling pendulum tuned mass damper provides the equivalent stiffness of the damper through the gravity restoring force of the inertial mass slider, without additional stiffness elements, and at the same time, the concave spherical slide of the sliding support enables the inertial mass slider to be self-reset under the action of gravity, without the need for an additional reset mechanism.
[0025] 4. Finally, the utility model can provide excellent bidirectional vibration damping and energy dissipation effect for the controlled structure, and can efficiently control horizontal vibration in any direction through a single inertial mass block. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is the structure schematic view of the bidirectional rolling pendulum tuned mass damper provided by the utility model embodiment;
[0027] Figure 2 It is the structure explosion schematic view of the bidirectional rolling pendulum tuned mass damper provided by the utility model embodiment;
[0028] Figure 3 It is the structure schematic view of the sliding support applied to Figure 1 ;
[0029] Figure 4 It is the implementation form schematic view of the ball guide applied to Figure 3 ;
[0030] Figure 5 It is the implementation form schematic view of the permanent magnet assembly applied to Figure 3 ;
[0031] Figure 6 It is the implementation form schematic view of the limiting and mounting base applied to Figure 1 .
[0032] Legend:
[0033] Inertial mass slider 1; ring-shaped conductor plate 2; permanent magnet assembly 3; ball guide 4; sliding support 5; limiting and mounting base 6; guide rail 401; ball 402; permanent magnet mounting hole 501; ball guide mounting hole 502; fixing hole 601; buffer rubber pad 602. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application.
[0035] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0036] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.
[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0038] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0039] As Figure 1 And Figure 2 The utility model discloses a bidirectional rolling pendulum tuned mass damper provided with the inertial mass slider 1 of annular conductor plate 2.
[0040] The sliding support 5 is installed below the inertial mass slider 1.
[0041] The sliding support 5 is installed below the inertial mass slider 1.
[0042] The limiting and mounting base 6 is located below the inertial mass slider 1 and is fixedly connected to the controlled structure.
[0043] The bottom of the inertial mass slider 1 is provided with a first arc-shaped structure, the top of the sliding support 5 is provided with a second arc-shaped structure consistent with the curvature of the first arc-shaped structure, the bottom of the inertial mass slider 1 is provided with the annular conductor plate 2, the top of the sliding support 5 is provided with the ball guide rail 4 and the permanent magnet assembly 3, the size of the eddy current damping is adjusted by changing the gap of the annular conductor plate 2 or the permanent magnet assembly 3, and the inertial mass slider 1 can move in each direction in the concave spherical surface of the sliding support 5.
[0044] The limiting and mounting base 6 is fixedly connected to the controlled structure, the sliding support 5 is fixed on the limiting and mounting base 6, the top of the sliding support 5 is a concave spherical surface, the permanent magnet assembly 3 and the ball guide rail 4 are installed in the sliding support 5, the inertial mass slider 1 is installed on the top of the sliding support 5, the bottom of the inertial mass slider 1 is provided with the annular conductor plate 2, the permanent magnet assembly 3 needs to have a certain compressive strength, and the curvature is consistent with the top of the sliding support 5.
[0045] In the embodiment, the inertial mass slider 1 is installed on the top of the sliding support 5, the inertial mass slider 1 is ensured to move in the concave spherical surface on the top of the sliding support 5, the damping stiffness is provided by the gravity restoring force of the inertial mass slider 1, no additional stiffness element is needed, and the structure is simple and economical.
[0046] In the embodiment, in order to effectively reduce the acceleration response of the wind turbine, the optimal tuning parameters of the bidirectional rolling pendulum tuned mass damper can be calculated by the classical Den-Hartog formula derived based on the fixed point theory.
[0047]
[0048] In the formula, ω n , Ω n Respectively, the natural frequency of the damper and the controlled structure, and μ is the mass ratio.
[0049] The bidirectional rolling pendulum tuned mass damper is simplified as a simple pendulum model, and the natural frequency is:
[0050]
[0051] wherein g is the acceleration of gravity, and R is the track radius of the sliding support in the bidirectional rolling pendulum tuned mass damper.
[0052] Specifically, the bottom of the inertial mass slider 1 is provided with a first arc structure, and the top of the sliding support 5 is provided with a second arc structure consistent with the curvature of the first arc structure, which can be inversely calculated according to formula 3.
[0053] In this embodiment, the inertial mass slider 1 is provided with a ring-shaped conductor plate 2 at the bottom, which is made of brass or red copper and has a curvature consistent with the bottom of the inertial mass slider 1. The size of the ring-shaped conductor plate 2 is designed according to the actual damping requirement.
[0054] In this embodiment, the permanent magnet assembly 3 has a certain compressive strength and a curvature consistent with the top surface of the sliding support 5. At the same time, there is a certain magnetic attraction between the permanent magnet assembly 3 and the inertial mass slider 1, which can further enhance the gravity restoring stiffness of the damper. The permanent magnet assembly 3 and the balls in the ball guide rail 4 are fixedly arranged inside the sliding support 5, which can effectively avoid the magnetic attraction between them.
[0055] In this embodiment, the ball guide rail 4 needs to have sufficient load-carrying capacity to support the sliding of the inertial mass slider 1 on its upper part. The balls in the ball guide rail 4 are made of steel material with high hardness and wear resistance, and their number is designed according to the actual requirement. The ball guide rail 4 is composed of a guide rail 401 and balls 402. The sliding surface of the guide rail 401 and the surface of the balls 402 are coated with low-friction lubricating material. At the same time, the balls 402 are made of steel material with high hardness and wear resistance, and the specific number is designed according to the actual requirement. The load-carrying capacity of a single ball can be calculated by the following formula:
[0056]
[0057] wherein P is the load-carrying capacity of the ball 402, E, r, σ HP are the elastic modulus, radius and allowable contact stress of the ball 402, respectively.
[0058] In this embodiment, the sliding support 5 is provided with permanent magnet mounting holes 501 and ball guide rail mounting holes 502 inside. Specifically, the permanent magnet assembly 3 and the ball guide rail 4 are fixedly arranged at the top of the sliding support 5, effectively avoiding the magnetic attraction between them. At the same time, when the bidirectional rolling pendulum tuned mass damper is in the balance position, the non-conductor plate area at the lower part of the inertial mass slider 1 is in contact with the ball guide rail 4, further reducing the wear of the ring-shaped conductor plate 2 caused by the pressure of the balls 402.
[0059] In the embodiment, the sliding support 5 is fixed on the limiting and mounting base 6, and in order to prevent the inertia mass slider 1 from sliding out of the sliding support 5 due to too large movement amplitude, the limiting and mounting base 6 is provided with a limiting buffer rubber pad 602 to prevent the inertia mass slider 1 from sliding out of the concave spherical surface of the sliding support 5. When the swing amplitude of the inertia mass slider 1 exceeds the preset limit, the inertia mass slider 1 will hit the limiting buffer rubber pad 602 to slow down and limit the movement of the inertia mass slider 1.
[0060] In the embodiment, the limiting and mounting base 6 is preferably a steel base, and the limiting and mounting base 6 is provided with a fixing hole 601 and can be embedded in the controlled structure or fixed on the top end of the controlled structure. The bidirectional rolling pendulum tuned mass damper has a self-resetting capability, and after the vibration control is completed, the inertia mass slider 1 returns to the balance position by gravity, and the bidirectional rolling pendulum tuned mass damper has excellent energy dissipation capability and can dissipate energy through friction and eddy current damping.
[0061] In summary, the embodiment of the utility model has at least the following advantages:
[0062] Firstly, the inertia mass slider 1 is supported by the sliding support 5 and slides on the concave spherical surface at the top of the sliding support 5, thereby avoiding the need for vertical installation space for the suspended mass block and having a simple structure and being economical.
[0063] Secondly, the utility model provides two damping mechanisms for the TMD system, one is the friction damping of the inertia mass slider 1 with the annular conductor plate 2 when sliding on the concave spherical surface at the top of the sliding support 5, and the other is the eddy current damping between the permanent magnet and the conductor plate; the effective combination of the two energy dissipation mechanisms greatly improves the energy dissipation capability of the damper and effectively solves the problems of limited friction damping energy dissipation capability of the friction pendulum TMD under large load disturbance and insufficient damping force of the eddy current damping under small speed and large displacement.
[0064] In addition, the bidirectional rolling pendulum tuned mass damper provides the equivalent stiffness of the damper by the gravitational restoring force of the inertia mass slider 1, without the need for additional stiffness elements, and the concave spherical slide of the sliding support 5 enables the inertia mass slider 1 to be self-resetting under the action of gravity, without the need for an additional reset mechanism.
[0065] Finally, the utility model can provide excellent bidirectional vibration reduction and energy dissipation effects for the controlled structure, and a single inertia mass block can efficiently control horizontal vibration in any direction.
[0066] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A bidirectional rolling pendulum tuned mass damper, characterized by, The application relates to a bidirectional rolling pendulum tuned mass damper. The bidirectional rolling pendulum tuned mass damper comprises the following parts: an inertial mass slider (1) provided with a ring-shaped conductor plate (2); a sliding support (5) installed below the inertial mass slider (1); a ball guide rail (4) and a permanent magnet assembly (3) arranged in the sliding support (5); and a limiting and mounting base (6) fixedly connected to a controlled structure below the inertial mass slider (1). The bottom of the inertial mass slider (1) is provided with a first arc-shaped structure, the top of the sliding support (5) is provided with a second arc-shaped structure consistent with the curvature of the first arc-shaped structure, the bottom of the inertial mass slider (1) is provided with the ring-shaped conductor plate (2), the top of the sliding support (5) is provided with the ball guide rail (4) and the permanent magnet assembly (3), the size of eddy current damping is adjusted by changing the gap of the ring-shaped conductor plate (2) or the permanent magnet assembly (3), and the inertial mass slider (1) can move in each direction in the concave spherical surface of the sliding support (5). The ring-shaped conductor plate (2) is made of brass or red brass, the curvature of the ring-shaped conductor plate (2) is consistent with the bottom of the inertial mass slider (1), and the size of the conductor plate can be designed according to actual damping requirements. The permanent magnet assembly (3) needs to have a certain compressive strength, and the curvature is consistent with the top of the sliding support (5). The permanent magnet assembly (3) and the inertial mass slider (1) have a certain magnetic attraction force, which can further enhance the gravity restoring force stiffness of the damper.
2. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, The ball guide rail (4) needs to have sufficient bearing capacity to support the sliding of the inertial mass slider (1) in the concave spherical surface on the top of the ball guide rail (4), the balls in the ball guide rail (4) are made of steel material with high hardness and wear resistance, and the number of the balls can be designed according to actual requirements.
3. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, The permanent magnet assembly (3) and the balls in the ball guide rail (4) are fixedly arranged in the sliding support (5), and the magnetic attraction force between the two can be effectively avoided.
4. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, When the bidirectional rolling pendulum tuned mass damper is in a balance position, the non-ring-shaped conductor plate (2) area of the inertial mass slider (1) is in contact with the ball guide rail (4), so that the wear of the ring-shaped conductor plate (2) caused by the balls is reduced.
5. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, The limiting and mounting base (6) is provided with a limiting buffer rubber pad, so that the inertial mass slider (1) cannot slide out of the concave spherical surface of the sliding support (5).
6. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, The bidirectional rolling pendulum tuned mass damper has a self-resetting capacity, and the inertial mass slider (1) can be restored to the balance position by gravity after vibration control is completed.
7. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, The bidirectional rolling pendulum tuned mass damper has excellent energy consumption capacity and can consume energy through friction and eddy current damping.
8. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, 9. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein, 10. The bidirectional rolling pendulum tuned mass damper of claim 1, wherein,