Bidirectional rolling pendulum type tuned mass damper
By adopting a bidirectional rolling swing structure in the tuning mass damper, combined with the damping mechanism of the annular conductor plate and permanent magnet assembly, the problems of insufficient energy consumption and large space occupation under large loads are solved, and efficient energy consumption and self-resetting capabilities are achieved.
Patent Information
- Application Number
- CN202510114376.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-03-18
AI Technical Summary
Traditional tuning mass dampers (TMDs) have limited energy consumption capacity under large load environments and have high demand for vertical space, which affects the sensitivity and service life of the structure.
The bidirectional rolling swing tuning mass damper is adopted to provide two energy-consuming mechanisms: friction and eddy current damping through the combination of annular conductor plate and permanent magnet assembly. Combined with the gravity recovery force of the inertial mass slider, it provides equivalent stiffness and achieves self-resetting.
It significantly improves the energy consumption capacity of the damper, solves the problem of insufficient energy consumption under large loads in traditional TMD, and saves vertical space, improving the fatigue resistance and service life of the structure.
Smart Images
Figure CN119640983A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of marine engineering and structural vibration reduction control equipment, and in particular to a bidirectional rolling pendulum type tuned mass damper. Background Art
[0002] Wind energy has developed rapidly in recent years due to its renewable, clean and abundant reserves. With the advancement of wind power technology, the capacity of single units and the height of towers are increasing. In addition, the operating environment of wind turbines is complex. Affected by the combined effects of wind, waves, currents and other dynamic loads, the structural safety and fatigue problems are becoming increasingly prominent. At the same time, it will also affect the normal operation of wind turbines, increase the fatigue load of various components, and shorten their service life.
[0003] Installing a vibration control system can effectively reduce the dynamic response of the structure, mitigate component damage, and enhance disaster resistance. Studies have shown that tuned mass dampers (TMDs) have a significant vibration reduction effect on structural wind vibration and earthquakes. TMDs do not rely on external energy to operate, and absorb and transmit vibration energy from the structure through the synergy of mass, stiffness, and damping elements.
[0004] Traditional TMDs usually require additional stiffness elements (such as springs, rails, etc.) and rely on viscous fluid dampers to dissipate energy. Not only are the mechanical connections complex, but there is also a risk of liquid leakage. Compared with traditional TMDs, pendulum TMDs can provide restoring stiffness through gravity, saving stiffness elements, but they have high vertical space requirements, and high-flexibility structures often occupy too much vertical space. The friction pendulum TMD constructed by combining the friction pendulum vibration isolation support and TMD effectively solves the problem of excessive vertical space occupation of the pendulum TMD, but its energy dissipation capacity increased by friction damping under large load environments is limited, and increasing the damping force requires increasing the mass block, which in turn affects the sensitivity of the damper. Summary of the invention
[0005] The purpose of the present invention is to solve the technical problems raised in the above background technology.
[0006] The present invention adopts the following technical solution: a bidirectional rolling pendulum tuned mass damper, comprising:
[0007] An inertial mass slider is provided with an annular conductor plate;
[0008] a sliding support mounted below the inertial mass slider;
[0009] A ball guide rail and a permanent magnet assembly are arranged inside the sliding support;
[0010] A limit and mounting base located below the inertial mass slider and fixedly connected to the controlled structure;
[0011] Among them, a first arc structure is provided at the bottom of the inertial mass slider, a second arc structure consistent with the curvature of the first arc structure is provided at the top of the sliding support, an annular conductor plate is installed at the bottom of the inertial mass slider, and a ball guide rail and a permanent magnet assembly are provided on the top of the sliding support. The eddy current damping size is adjusted by changing the gap between the annular conductor plate or the permanent magnet assembly, and the inertial mass slider can move in all directions within the concave spherical surface of the sliding support.
[0012] Furthermore, the annular conductor plate is made of brass or red copper, and its curvature is consistent with the bottom of the inertial mass slider. The size of the conductor plate can be designed according to actual damping requirements.
[0013] Furthermore, the permanent magnet assembly needs to have a certain compressive strength, and the curvature is consistent with the top of the sliding support.
[0014] Furthermore, there is a certain magnetic attraction force between the permanent magnet assembly and the inertial mass slider, which can further enhance the gravity restoring force stiffness of the damper.
[0015] Furthermore, the ball guide rail needs to have sufficient load-bearing capacity to support the sliding of the inertial mass slider in the concave spherical surface at its top. The balls in the ball guide rail are made of steel material with high hardness and wear resistance, and their number is designed according to actual needs.
[0016] Furthermore, the permanent magnet assembly and the balls in the ball guide rail are fixedly arranged inside the sliding support, which can effectively avoid the magnetic attraction force between the two.
[0017] Furthermore, when the bidirectional rolling pendulum tuned mass damper is in a balanced position, the non-annular conductor plate region at the bottom of the inertial mass slider contacts the ball guide rail, thereby reducing the loss of the ball to the annular conductor plate caused by the pressure weight.
[0018] Furthermore, a limiting buffer rubber pad is provided on the limiting and mounting base to prevent the inertial mass sliding block from sliding out of the concave spherical surface of the sliding support.
[0019] Furthermore, the bidirectional rolling pendulum tuned mass damper has a self-resetting capability, and after the vibration control is completed, the inertial mass slider returns to a balanced position by its own weight.
[0020] Furthermore, 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 advantages and positive effects of the present invention are:
[0022] 1. In the present invention, firstly, the inertial mass slider is supported by a sliding support and slides in the concave spherical surface at the top thereof, thereby avoiding the vertical installation space required for suspending the mass block, and the structure is simple and economical.
[0023] 2. The present invention provides two 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, and 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 eddy current damping under low speed and large displacement.
[0024] 3. In addition, the bidirectional rolling pendulum tuned mass damper provides equivalent stiffness of the damper through the gravity restoring force of the inertial mass slider, without the need for additional stiffness elements. At the same time, the concave spherical slideway of the sliding support enables the inertial mass slider to achieve self-reset under the action of gravity, and no additional reset mechanism is required.
[0025] 4. Finally, the present invention can provide excellent bidirectional vibration reduction and energy dissipation effects for the controlled structure, and horizontal vibration in any direction can be efficiently controlled by a single inertial mass block. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic structural diagram of a bidirectional rolling pendulum tuned mass damper provided in an embodiment of the present invention;
[0027] Figure 2 Schematic diagram of the structure explosion of a bidirectional rolling pendulum tuned mass damper provided by an embodiment of the present invention;
[0028] Figure 3 The embodiment of the present invention provides an application Figure 1 A schematic diagram of the structure of the sliding support in FIG.
[0029] Figure 4 The embodiment of the present invention provides an application Figure 3 Schematic diagram of the implementation form of the ball guide rail;
[0030] Figure 5 The embodiment of the present invention provides an application Figure 3 Schematic diagram of the implementation form of the permanent magnet assembly in;
[0031] Figure 6 The embodiment of the present invention provides an application Figure 1 Schematic diagram of the implementation form of the limit and mounting base.
[0032] Legend:
[0033] Inertial mass slider 1; annular conductor plate 2; permanent magnet assembly 3; ball guide rail 4; sliding support 5; limit and mounting base 6; guide rail 401; ball 402; permanent magnet mounting hole 501; ball guide rail mounting hole 502; fixing hole 601; buffer rubber pad 602. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.
[0035] In the description of the present invention, it is necessary to understand that the terms "length", "width", "thickness", "up", "down", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0039] like Figure 1 and Figure 2As shown, a bidirectional rolling pendulum tuned mass damper provided by an embodiment of the present invention is provided with an inertial mass slider 1 of a ring-shaped conductor plate 2;
[0040] A sliding support 5 installed below the inertial mass slider 1;
[0041] The ball guide rail 4 and the permanent magnet assembly 3 are arranged inside the sliding support 5;
[0042] A limit and mounting base 6 located under the inertial mass slider 1 and fixedly connected to the controlled structure;
[0043] Among them, a first arc structure is provided at the bottom of the inertial mass slider 1, and a second arc structure with a curvature consistent with the first arc structure is provided at the top of the sliding support 5. An annular conductor plate 2 is installed at the bottom of the inertial mass slider 1, and a ball guide rail 4 and a permanent magnet assembly 3 are provided on the top of the sliding support 5. The eddy current damping size is adjusted by changing the gap between the annular conductor plate 2 or the permanent magnet assembly 3, and the inertial mass slider 1 can move in all directions within the concave spherical surface of the sliding support 5.
[0044] Among them, 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 inside the sliding support 5, the inertial mass slider 1 is installed on the top of the sliding support 5, and an annular conductor plate 2 is arranged at the bottom of the inertial mass block 1. 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 this embodiment, the inertial mass slider 1 is installed on the top of the sliding support 5, and the inertial mass slider 1 is ensured to move in the concave spherical surface on the top of the sliding support 5. The damper stiffness is provided by the gravity restoring force of the inertial mass slider 1, and no additional stiffness elements are required. The structure is simple and economical.
[0046] In this 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 classic Den-Hartog formula derived based on the fixed point theory:
[0047]
[0048]
[0049] In the formula, ω n ,Ω n are the natural frequencies of the damper and the controlled structure respectively, and μ is the mass ratio.
[0050] The bidirectional rolling pendulum tuned mass damper is simplified to a single pendulum model, and its natural frequency is:
[0051]
[0052] Where g is the acceleration of gravity and R is the track radius of the sliding support in the bidirectional rolling pendulum tuned mass damper.
[0053] Specifically, a first arc structure is provided at the bottom of the inertial mass slider 1 , and a second arc structure having a curvature consistent with that of the first arc structure is provided at the top of the sliding support 5 . The curvature can be inversely calculated according to Formula 3.
[0054] In this embodiment, an annular conductor plate 2 is provided at the bottom of the inertial mass slider 1. The conductor plate is made of brass or copper, and its curvature is consistent with the bottom of the inertial mass slider 1. The size of the annular conductor plate 2 is designed according to actual damping requirements.
[0055] In this embodiment, the permanent magnet assembly 3 has a certain compressive strength, and its curvature is 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 force 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 the two.
[0056] In this embodiment, the ball guide rail 4 needs to have sufficient bearing 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 the number of balls is designed according to actual needs. 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 materials. 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 actual needs. The bearing capacity of a single ball can be calculated by the following formula:
[0057]
[0058] Where P is the bearing capacity of ball 402, E,r,σ HP They are the elastic modulus, radius and allowable contact stress of the ball 402 respectively.
[0059] In this embodiment, a permanent magnet mounting hole 501 and a ball guide rail mounting hole 502 are provided inside the sliding support 5. Specifically, the permanent magnet assembly 3 and the ball guide rail 4 are fixedly arranged on the top of the sliding support 5, effectively avoiding the magnetic attraction between the two. At the same time, when the bidirectional rolling pendulum tuned mass damper is in the equilibrium position, the non-conductor plate area at the bottom of the inertial mass slider 1 is in contact with the ball guide rail 4, further reducing the loss of the ball 402 to the annular conductor plate 2 due to the pressure.
[0060] In this embodiment, the sliding support 5 is fixed on the limiting and mounting base 6. At the same time, in order to prevent the inertial mass slider 1 from sliding out of the sliding support 5 due to excessive movement, a limiting buffer rubber pad 602 is provided on the limiting and mounting base 6 to prevent the inertial mass slider 1 from sliding out of the concave spherical surface of the sliding support 5. When the swing amplitude of the inertial mass slider 1 exceeds a preset limit, the inertial mass slider 1 will hit the limiting buffer rubber 602 to slow down and limit the movement of the inertial mass slider 1.
[0061] In this embodiment, the limiting and mounting base 6 is preferably a steel base, and a fixing hole 601 is provided on the limiting and mounting base 6, which can be embedded inside the controlled structure or fixed on the top of the controlled structure. The bidirectional rolling pendulum tuned mass damper has a self-resetting capability. After the vibration control is completed, the inertial mass slider 1 relies on its own weight to restore to the equilibrium position. The bidirectional rolling pendulum tuned mass damper has excellent energy dissipation capability and can dissipate energy through friction and eddy current damping.
[0062] In summary, the embodiments of the present invention have at least the following beneficial effects:
[0063] Firstly, the inertial mass slider 1 is supported by the sliding support 5 and slides on the concave spherical surface at the top thereof, thereby avoiding the vertical installation space required when suspending the mass block, and the structure is simple and economical.
[0064] Secondly, the present invention provides two damping mechanisms for the TMD system, one is the friction damping when the inertial mass slider 1 with the annular conductor plate 2 slides 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 capacity of the damper, and 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 low speed and large displacement.
[0065] In addition, the bidirectional rolling pendulum tuned mass damper provides equivalent stiffness of the damper through the gravity restoring force of the inertial mass slider 1, without the need for additional stiffness elements. At the same time, the concave spherical slideway of the sliding support 5 enables the inertial mass slider 1 to achieve self-reset under the action of gravity, and no additional reset mechanism is required.
[0066] Finally, the present invention can provide an excellent bidirectional vibration reduction and energy dissipation effect for the controlled structure, and horizontal vibration in any direction can be efficiently controlled by a single inertial mass block.
[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A bidirectional rolling pendulum tuned mass damper, characterized in that: include: An inertial mass slider (1) provided with an annular conductor plate (2); A sliding support (5) mounted below the inertial mass slider (1); A ball guide rail (4) and a permanent magnet assembly (3) are arranged inside the sliding support (5); A limit and mounting base (6) located below the inertial mass slider (1) and fixedly connected to the controlled structure; The bottom of the inertial mass slider (1) is provided with a first arc structure, the top of the sliding support (5) is provided with a second arc structure having a curvature consistent with the first arc structure, the bottom of the inertial mass slider (1) is provided with an annular conductor plate (2), the top of the sliding support (5) is provided with a ball guide rail (4) and a permanent magnet assembly (3), the eddy current damping size is adjusted by changing the gap between the annular conductor plate (2) or the permanent magnet assembly (3), and the inertial mass slider (1) can move in all directions within the concave spherical surface of the sliding support (5).
2. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The annular conductor plate (2) is made of brass or red copper, and its curvature is consistent with the bottom of the inertial mass slider (1). The size of the conductor plate can be designed according to actual damping requirements.
3. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The permanent magnet assembly (3) needs to have a certain compressive strength, and its curvature should be consistent with the top of the sliding support (5).
4. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: There is a certain magnetic attraction force between the permanent magnet assembly (3) and the inertial mass slider (1), which can further enhance the gravity restoring force stiffness of the damper.
5. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The ball guide rail (4) needs to have sufficient load-bearing capacity to support the sliding of the inertial mass slider (1) within the concave spherical surface at the top thereof. The balls in the ball guide rail (4) are made of steel material with high hardness and wear resistance, and the number of balls is designed according to actual needs.
6. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The permanent magnet assembly (3) and the balls in the ball guide rail (4) are both fixedly arranged inside the sliding support (5), which can effectively avoid the magnetic attraction force between the two.
7. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: When the bidirectional rolling pendulum tuned mass damper is in a balanced position, the non-annular conductor plate (1) area at the bottom of the inertial mass slider (1) contacts the ball guide rail (4), thereby reducing the loss of the annular conductor plate (1) caused by the ball bearings due to the pressure.
8. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: A limit buffer rubber pad is provided on the limit and mounting base (6) to prevent the inertial mass slider (1) from sliding out of the concave spherical surface of the sliding support (5).
9. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The bidirectional rolling pendulum type tuned mass damper has a self-resetting capability, and after the vibration control is completed, the inertial mass slider (1) returns to a balanced position by its own weight.
10. The bidirectional rolling pendulum tuned mass damper according to claim 1, characterized in that: The bidirectional rolling pendulum tuned mass damper has excellent energy dissipation capability and can dissipate energy through friction and eddy current damping.