A mass collision tuned mass damper device at a balance position

Abstract

The application discloses a kind of mass collides tuning mass damper device in equilibrium position, comprising: base, the base is fixed with controlled structure;Collision baffle is vertically fixed in the equilibrium position of base;Collision baffle is equipped with cushioning material in opposite two side surfaces;Two limit plates are fixed on base and symmetrically arranged on the two sides of collision baffle, and two limit plates are spaced apart from collision baffle;First mass is placed between first limit plate and collision baffle, second mass is placed between second limit plate and collision baffle, and the center line of two masses is perpendicular to collision baffle;Two masses reciprocate on the surface of base along the direction parallel to the center line thereof;Two springs are arranged one by one corresponding to two masses and two limit plates, and each spring is connected with mass and limit plate;In natural extension state of spring, mass is in contact with cushioning material on the side of collision baffle and is not forced.The application is symmetrical in structure, stable in vibration control process, reliable in damping effect, and has the advantages of simple principle, simple structure, convenient installation, wide application range, etc.

Description

Technical Field

[0001] This invention relates to a collision-tuned mass damping device for a mass block at its equilibrium position, belonging to the field of structural vibration control technology in civil engineering. Background Technology

[0002] High-rise building structures, bridges, ships, large oil pipelines and other structures are prone to vibration due to internal or external loads, requiring vibration control. Collision-tuned mass damping devices are a vibration control method proposed in recent years. Collision-tuned mass damping devices have been rapidly developed and widely applied in the engineering field due to their simple structure, readily available materials, low cost and excellent vibration reduction efficiency.

[0003] However, existing collision-tuned mass damping devices often deviate from the equilibrium position of the mass block's motion, resulting in the mass block's velocity not reaching its maximum value at the time of collision, thus limiting energy transfer and dissipation efficiency. Simultaneously, some damping devices have asymmetrical structures, leading to force imbalance during vibration control and insufficient stability of the vibration reduction effect, making it difficult to meet vibration control requirements under different directions and working conditions. Furthermore, some devices rely solely on bolt connections without welding or other reinforcement methods, making them prone to bolt loosening under long-term vibration. Additionally, some components are made of ordinary carbon steel, whose structural strength cannot meet the requirements of long-term collision vibration, making them susceptible to deformation and damage under prolonged collision and vibration, affecting the service life and vibration reduction reliability of the damping device. Therefore, there is an urgent need to develop a novel collision-tuned mass damping device with a symmetrical structure, reasonable collision position, high vibration reduction efficiency, strong stability, and wide adaptability to solve the problems existing in the current technology. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, this invention provides a collision-tuned mass damping device for a mass block at its equilibrium position, which causes the collision to occur at the equilibrium position where the mass block's velocity is at its maximum, thereby improving energy dissipation efficiency. At the same time, the symmetrical structure ensures the stability of vibration control, thus achieving a better vibration reduction effect.

[0005] The technical solution of this invention is:

[0006] A collision-tuned mass damping device for a mass block at its equilibrium position includes:

[0007] Base 6, which is fixed to the controlled structure 7;

[0008] The collision baffle 4 is vertically fixed to the balance position of the base 6; the collision baffle 4 has buffer material 3 on both opposite sides.

[0009] Two limiting plates 5 are fixed on the base 6 and arranged symmetrically on both sides of the collision baffle 4. The two limiting plates 5 are spaced apart from the collision baffle 4.

[0010] Two mass blocks 1, the first mass block 1 is placed between the first limiting plate 5 and the collision baffle 4, and the second mass block 1 is placed between the second limiting plate 5 and the collision baffle 4, and the line connecting the centers of the two mass blocks 1 is perpendicular to the collision baffle 4; the two mass blocks 1 reciprocate on the surface of the base 6 in a direction parallel to the line connecting their centers.

[0011] Two springs 2 are arranged in a one-to-one correspondence with two mass blocks 1 and two limiting plates 5. Each spring 2 is connected to the mass block 1 and the limiting plate 5. In the naturally extended state of the springs 2, the mass block 1 is in contact with the buffer material 3 on the side of the collision baffle 4 and is not subjected to force.

[0012] Furthermore, the two mass blocks 1 have the same mass; and the mass blocks 1 are made of high-density material.

[0013] Furthermore, the two springs 2 have the same stiffness, and the overall natural frequency of the damping device is... From the formula Confirmed, among which For the stiffness of a single spring, The mass of a single mass block; based on the natural vibration frequency of the controlled structure. Select the mass of a single mass block And through the formula Calculate the stiffness k of a single spring to make the overall natural frequency of the damping device... With the natural vibration frequency of the controlled structure Consistent.

[0014] Furthermore, one end of each spring 2 is double-fixed to the corresponding mass block 1 by bolts and welding, and the other end of each spring 2 is double-fixed to the corresponding limiting plate 5 by bolts and welding.

[0015] Furthermore, the buffer material 3 is a viscoelastic material or a friction material.

[0016] Furthermore, the side of the collision baffle 4 with the buffer material 3 is taken as the main plane of the baffle;

[0017] The parameters of the collision baffle 4 are designed as follows: the thickness perpendicular to the main plane of the baffle is 10mm-30mm; the horizontal dimension along the main plane of the collision baffle is the width, and the vertical dimension along the main plane of the collision baffle is the height; the width of the collision baffle 4 is greater than or equal to the width of the mass block 1, and the height of the collision baffle 4 is greater than or equal to the height of the mass block 1.

[0018] Furthermore, the collision baffle 4 and the base 6 are made of steel plate or aluminum plate.

[0019] The beneficial effects of this invention are: the device has a symmetrical structure, stable vibration control process, and reliable vibration reduction effect. It also possesses advantages such as simple principle, easy construction, convenient installation, and wide applicability, making it widely applicable to vibration control needs in various engineering structures such as buildings, bridges, and ships. Specifically: through the ingenious design of the installation layout of the mass blocks and other components, this invention enables the synchronous reverse vibration of the two mass blocks when the controlled structure vibrates, transferring vibration energy from the controlled structure to the mass blocks. When the mass blocks move to the equilibrium position, they collide with the buffer material on the collision baffle side, causing the buffer material to dissipate energy through deformation or friction, thereby suppressing the vibration of the controlled structure. During vibration control, the two mass blocks move alternately in opposite directions with the structure, with energy transfer and energy consumption processes working synergistically and independently. Furthermore, because the collision occurs at the equilibrium position where the mass blocks have the highest velocity, the energy dissipation efficiency is significantly improved. Attached Figure Description

[0020] Figure 1 This is a side view of the collision-tuned mass damping device for a mass block at its equilibrium position according to the present invention.

[0021] Figure 2 Here are examples of the width, height, and thickness of the collision barrier.

[0022] Figure 3 This is a schematic diagram illustrating the mechanical principle of a collision-tuned mass damping device for a mass block at its equilibrium position according to the present invention.

[0023] Figure 4 This is a schematic diagram illustrating an application example of the collision-tuned mass damping device for a mass block at its equilibrium position according to the present invention.

[0024] The labels in the diagram are as follows: 1-mass block; 2-spring; 3-buffer material; 4-collision baffle; 5-limiting plate; 6-base; 7-controlled structure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0026] Example 1: As Figures 1-4 As shown, a collision-tuned mass damping device for a mass block at its equilibrium position includes:

[0027] The base 6 is fixed to the controlled structure 7; for example, the base and the controlled structure are double-fixed by bolts and welding, providing an installation foundation for the entire damping device.

[0028] The collision baffle 4 is vertically fixed to the balance position of the base 6; both sides of the collision baffle 4 are provided with buffer material 3, the thickness of the buffer material is less than the thickness of the collision baffle; for example, the collision baffle and the base 6 are double fixed by bolts and welding; the buffer material 3 is pasted on both sides of the collision baffle 4.

[0029] Two limiting plates 5 are fixed to the base 6 and symmetrically arranged on both sides of the collision baffle 4. The two limiting plates 5 are parallel to the collision baffle 4 and are spaced apart. For example, the limiting plates 5 and the base 6 are double fixed by bolts and welding.

[0030] Two mass blocks 1 are used. The first mass block 1 is placed between the first limiting plate 5 and the collision baffle 4, and the second mass block 1 is placed between the second limiting plate 5 and the collision baffle 4. The center line connecting the two mass blocks 1 is perpendicular to the collision baffle 4. The two mass blocks 1 reciprocate on the surface of the base 6 in a direction parallel to the center line connecting the two. Furthermore, the two mass blocks have the same mass. The mass blocks 1 are made of high-density materials such as high-density cast iron, cast steel, or lead alloy to ensure that they have sufficient inertia to absorb and transmit the vibration energy of the controlled structure.

[0031] Two springs 2 are arranged in a one-to-one correspondence with two mass blocks 1 and two limiting plates 5. Each spring 2 is connected to both the mass block 1 and the limiting plate 5, providing stiffness for the damping device. In the naturally extended state of the springs 2, the mass block 1 is in contact with the buffer material 3 on the side of the collision baffle 4 and is not subjected to force. Exemplarily, one end of each spring 2 is double-fixed to the corresponding mass block 1 by bolts and welding, and the other end is double-fixed to the corresponding limiting plate 5 by bolts and welding. The springs 2 provide restoring force for the reciprocating motion of the mass block 1, so that the mass block 1 remains in the initial position close to the collision baffle when at rest, and can reciprocate along the axis of the spring during vibration (i.e., along the direction of the line connecting the centers of the two mass blocks 1).

[0032] Furthermore, the two springs 2 have the same stiffness, and the overall natural frequency of the damping device is... From the formula Confirmed, among which For the stiffness of a single spring, The mass of a single mass block; based on the natural vibration frequency of the controlled structure. Select the mass of a single mass block And through the formula Calculate the stiffness k of a single spring to make the overall natural frequency of the damping device... With the natural vibration frequency of the controlled structure Consistency is achieved, thus realizing efficient vibration reduction. Applying the above technical solution, it can be seen that this invention can achieve this by adjusting the spring stiffness k and the mass of the mass block. The parameter values ​​can be adjusted to adapt the damper to controlled structures with different natural vibration frequencies, thereby achieving vibration tuning control under various operating conditions.

[0033] This damping device is designed to meet the vibration control needs of different controlled structures. Based on the core matching principle, through For example, parameter matching design is performed for horizontal vibration control of a high-rise frame structure (assuming its natural vibration frequency). ), making the damping device's natural frequency Select the mass of a single mass block The stiffness of a single spring can be calculated. At this point, the natural frequency of the damping device precisely matches the natural vibration frequency of the controlled structure, enabling efficient vibration energy transfer; this is applied to the vertical vibration control of a small bridge (assuming its natural vibration frequency...). Let the damping device have its natural frequency. Select the mass of a single mass block The stiffness of a single spring can be calculated. At this point, the natural frequency of the damping device precisely matches the natural vibration frequency of the controlled structure, completing the tuning match. Applying the above technical solution, it can be seen that the parameters of each component can be flexibly adjusted according to the natural frequency of the controlled structure in the actual engineering scenario, exhibiting wide adaptability.

[0034] Furthermore, the buffer material 3 is an energy-dissipating material such as a viscoelastic material or a friction material, which is used to dissipate vibration energy by deforming or generating friction during the collision.

[0035] Furthermore, the collision baffle 4 is made of steel or aluminum plate, and any side of the collision baffle 4 where the buffer material 3 is provided is used as the main plane of the baffle; (Refer to...) Figure 2 The parameters of the collision baffle 4 are designed as follows: the thickness perpendicular to the main plane of the baffle is 10mm-30mm (that is, the dimension along the connection direction of the centers of the two mass blocks 1 is the thickness); the horizontal dimension along the main plane of the collision baffle is the width, and the vertical dimension along the main plane of the collision baffle is the height; the width of the collision baffle 4 is greater than or equal to the width of the mass block 1, and the height of the collision baffle 4 is greater than or equal to the height of the mass block 1, to ensure the structural stability of the mass blocks during collision.

[0036] Furthermore, the base 6 is made of steel plate or aluminum plate.

[0037] refer to Figure 3The damping device of the present invention achieves vibration control through the synergistic effect of energy transfer and collision energy dissipation, and the energy transfer and energy consumption processes are completely independent. The specific working process is as follows:

[0038] When the controlled structure vibrates, since the base 6 and the controlled structure are double-fixed by bolts and welding, the vibration will be quickly transmitted to the base 6 of the damping device, then to the limit plate 5, the collision baffle 4, and then to the spring 2 and the mass block 1.

[0039] Under the restoring force of the spring 2, the two mass blocks 1 of the damping device reciprocate with the same frequency but opposite direction as the vibration of the controlled structure, thereby realizing the transfer of vibration energy from the controlled structure to the mass blocks;

[0040] Since the mass block 1 has the maximum speed when it is in the equilibrium position, when the mass block 1 moves to the equilibrium position, it will collide with the buffer material 3 on both sides of the collision baffle 4.

[0041] When a collision occurs, the buffer material 3 undergoes elastic deformation or generates sliding friction, converting the kinetic energy of the mass block 1 into heat energy or deformation energy and dissipating it, thereby reducing the vibration energy of the mass block.

[0042] During vibration control, the two mass blocks 1 move and collide alternately: when the controlled structure moves to the right of the equilibrium position, the mass blocks 1 on the left and right sides of the collision baffle 4 move synchronously to the equilibrium position under the action of the spring restoring force, and the left mass block collides with the buffer material 3; when the controlled structure moves to the left of the equilibrium position, the two mass blocks also move synchronously to the equilibrium position, and the right mass block collides with the buffer material; through the synchronous movement and alternating collision of the two mass blocks, vibration energy is continuously dissipated, and the vibration of the controlled structure is effectively suppressed.

[0043] Example 2: A collision-tuned mass damping device with a mass block at its equilibrium position, as described in Example 1, is used for wind-induced vibration control of tall structures. For the condition where the structure's principal natural frequency is 5Hz and the vibration amplitude is relatively large, the damper's natural frequency formula is applied. Match design parameters and select the mass of a single mass block. And the stiffness of a single spring is calculated. This ensures that the natural frequency of the damper matches the natural vibration frequency of the structure, thereby achieving efficient vibration reduction.

[0044] In this embodiment, the damper is installed at the top equipment layer of the TV tower, with one damper installed along the windward direction and one along the crosswind direction, arranged orthogonally.

[0045] The damper installation process in this embodiment can be as follows: the base 6 is fixed to the steel truss node plate by chemical anchors, the buffer material 3 is first fixed to both sides of the collision baffle 4, the collision baffle 4 is then installed on the base 6 and its verticality is calibrated, the spring 2 and the mass block 1 are then installed in sequence to ensure that the movement trajectory of the mass block 1 is perpendicular to the collision baffle 4, and finally the limit plate 5 is installed and the spacing is adjusted.

[0046] When the tall structure vibrates under wind force, the vibration is transmitted through the base 6 to the limiting plate 5, spring 2, and mass blocks 1. Under the restoring force of the spring 2, the two mass blocks 1 reciprocate in opposite directions at a frequency of 5Hz, thus transferring vibration energy from the structure to the mass blocks 1. When the mass blocks 1 reach the equilibrium position, their velocity reaches its maximum value, colliding with the buffer materials on both sides of the collision baffle 4. During the collision, the viscoelastic material undergoes elastic deformation, converting the kinetic energy of the mass blocks 1 into deformation energy and thermal energy. Vibration energy dissipation: During vibration control, when the structure moves to the left of the equilibrium position, the left and right mass blocks 1 move synchronously to the equilibrium position under the restoring force of the spring 2, and the right mass block 1 collides with the right buffer material 3; when the structure moves to the right of the equilibrium position, the left and right mass blocks 1 move synchronously to the equilibrium position under the restoring force of the spring 2, and the left mass block 1 collides with the left buffer material 3; through the synchronous and unidirectional movement and alternating collision of the two mass blocks 1, vibration energy is continuously dissipated, and the vibration of the structure is effectively suppressed.

[0047] Example 3: A collision-tuned mass damping device with a mass block at its equilibrium position, as described in Example 1, is used for vibration control of a large oil pipeline. This is designed for a pipeline with a natural frequency of 10Hz, where the vibration amplitude is large due to the flow of fluids such as crude oil, refined oil, or natural gas transported within the pipeline, and long-term vibration can easily lead to fatigue damage to the supports. The damper's natural frequency formula is used... Match design parameters and select the mass of a single mass block. And the stiffness of a single spring is calculated. This ensures that the natural frequency of the damper matches the natural vibration frequency of the pipeline, thereby achieving efficient vibration reduction and reducing the risk of fatigue damage to the pipeline support.

[0048] In this embodiment, the damping device is installed at the middle support of the overhead pipeline section, with one damper installed along the vertical direction of the pipeline and the base fixed to the top of the support beam.

[0049] The damper installation process in this embodiment is as follows: First, the base 6 is welded and fixed to the support beam. Then, the buffer material 3 is fixed to both sides of the collision baffle 4 and the installation of the buffer material is checked. Next, the calibration collision baffle 4 is installed on the base 6 and the verticality is calibrated. The spring 2 and the mass block 1 are installed to ensure that the mass block 1 is perpendicular to the collision baffle 4. Finally, the limit plate 5 is fixed and the spacing is adjusted.

[0050] When the damping device in this embodiment is working, the vibration of the oil pipeline is transmitted to each component of the damper through the base 6. Under the action of the spring 2, the mass block 1 moves back and forth with the pipeline at a frequency of 10Hz in the opposite direction. It collides with the friction material at the equilibrium position and dissipates kinetic energy through friction. The mass blocks 1 on both sides collide alternately to continuously reduce vibration, thereby effectively reducing fatigue damage to the pipeline and extending the service life of the pipeline.

[0051] This invention addresses the technical shortcomings of existing collision-tuned mass damping devices. Firstly, by positioning the collision baffle 4 at the equilibrium position of the mass block 1, the mass block 1 collides with the buffer material 3 at its maximum velocity. This solves the problem of limited energy transfer and dissipation efficiency caused by the collision position deviating from the equilibrium position in existing technologies, significantly improving vibration energy dissipation efficiency. Under simulation conditions with the same vibration and testing methods, for an oil pipeline with a natural vibration frequency of 10Hz, the vibration reduction performance of this damping device is superior to traditional collision-tuned mass damping devices (such as single-sided collision-tuned mass dampers (PTMDs)), effectively reducing the structural vibration amplitude. Secondly, this invention employs a symmetrical structural design, with identical mass blocks 1 and springs 2 on both sides of the collision baffle. This ensures balanced force on both sides during vibration control, improving the problem of force imbalance and insufficient vibration reduction stability caused by structural asymmetry in existing technologies. Long-term simulation verification shows that this damping device has stable vibration reduction effects and can meet vibration control requirements under different directions and conditions. Thirdly, the collision baffle 4 and the limiting plate 5 in this invention... All components are double-fixed to the base 6 using bolts and welding. The collision baffle 4 and the base 6 are made of steel or aluminum plates, which have superior material strength and structural rigidity compared to ordinary carbon steel. This improves upon the problems of easy loosening under long-term vibration and component deformation and damage caused by insufficient material strength in existing technologies that rely solely on bolt connections. This makes the damping device less prone to loosening, deformation, and failure under long-term collision and alternating loads, thus enhancing the overall structural durability and vibration reduction reliability of the device. At the same time, the energy transfer and energy dissipation processes of this invention are coordinated and independent of each other. It also has advantages such as symmetrical structure, simple principle, simple construction, convenient installation, and wide applicability, making it suitable for vibration control needs of various engineering structures such as building structures, tall structures, bridges, ships, and large oil pipelines.

[0052] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A collision-tuned mass damping device for a mass block at its equilibrium position, characterized in that, include: The base (6) is fixed to the controlled structure (7); The collision baffle (4) is vertically fixed to the balance position of the base (6); the collision baffle (4) has buffer material (3) on both opposite sides. Two limiting plates (5) are fixed on the base (6) and arranged symmetrically on both sides of the collision baffle (4). The two limiting plates (5) are spaced apart from the collision baffle (4). Two mass blocks (1), the first mass block (1) is placed between the first limiting plate (5) and the collision baffle (4), and the second mass block (1) is placed between the second limiting plate (5) and the collision baffle (4), and the center line connecting the two mass blocks (1) is perpendicular to the collision baffle (4); the two mass blocks (1) reciprocate on the surface of the base (6) in a direction parallel to the center line connecting the two; Two springs (2) are arranged in a one-to-one correspondence with two mass blocks (1) and two limiting plates (5). Each spring (2) is connected to the mass block (1) and the limiting plate (5). When the spring (2) is in its natural extended state, the mass block (1) is in contact with the buffer material (3) on the side of the collision baffle (4) and is not subjected to force.

2. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, The two mass blocks (1) have the same mass; and the mass blocks (1) are made of high-density material.

3. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, The two springs (2) have the same stiffness, and the overall natural frequency of the damping device is... From the formula Confirmed, among which For the stiffness of a single spring, The mass of a single mass block; based on the natural vibration frequency of the controlled structure. Select the mass of a single mass block And through the formula Calculate the stiffness k of a single spring to make the overall natural frequency of the damping device... With the natural vibration frequency of the controlled structure Consistent.

4. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, One end of each spring (2) is double-fixed to the mass block (1) on the corresponding side by bolts and welding, and the other end of each spring (2) is double-fixed to the limiting plate (5) on the corresponding side by bolts and welding.

5. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, The buffer material (3) is a viscoelastic material or a friction material.

6. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, Take any side of the collision baffle (4) with the buffer material (3) as the main plane of the baffle; The parameters of the collision baffle (4) are designed as follows: the thickness of the baffle is 10mm-30mm perpendicular to the main plane of the baffle; the horizontal dimension along the main plane of the collision baffle is the width, and the vertical dimension along the main plane of the collision baffle is the height; the width of the collision baffle (4) is greater than or equal to the width of the mass block (1), and the height of the collision baffle (4) is greater than or equal to the height of the mass block (1).

7. The collision-tuned mass damping device for a mass block at its equilibrium position according to claim 1, characterized in that, The collision baffle (4) and the base (6) are made of steel or aluminum plate.

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