Novel structure for connecting viscous damper and structure in tuned mass damping system

Abstract

The invention belongs to the technical field of vibration control, discloses a novel structure for connecting a viscous damper and a structure in a tuned mass damping system, and aims to solve the problem that the viscous damper is difficult to start due to overlarge initial friction force. The connection between the viscous damper and the controlled structure is set as a simple and reliable elastic connection or local non-connection structure, so that the clamping stagnation phenomenon caused by a traditional rigid connection mode is effectively avoided, and the damping system and the viscous damper can respond more quickly to enter a working state; therefore, the energy dissipation capacity of the damping system under the conditions of small-amplitude vibration and low inertia force is improved, and compared with a traditional connection structure, the vibration control performance of the damping system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration control and relates to a new structure for connecting a viscous damper with a structure in a tuned mass damping system. Background Art

[0002] Tuned mass damping systems are widely used in vibration control of large structures such as high-rise buildings, bridges, and towers. Their main function is to absorb and consume the vibration energy of the structure under wind loads and other dynamic forces by tuning their own frequencies to be close to the same as the structure's, using the principle of resonance amplification, thereby suppressing structural vibration. A tuned mass damping system is usually composed of three main components: a spring, an oscillator, and a damper. The performance of the damper directly affects the overall control effect. In this system, viscous dampers are the most widely used. However, this type of damper has a significant disadvantage: the initial friction is large. Only when the amplitude of the oscillator following the structure is large enough can the inertia of the oscillator overcome the static friction of the damper and make it consume energy. This results in the inability of the tuned mass damping system to effectively suppress small-amplitude vibrations of the structure.

[0003] In order to solve this problem, it is necessary to transform and optimize the connection structure of the traditional viscous damper to avoid the problem that the viscous damper cannot be started and cannot consume energy to suppress vibration when the controlled structure has obvious vibration conditions. This will significantly improve the performance and function of the tuned mass damping system. Summary of the invention

[0004] The present invention designs a simple and efficient structure for the viscous damper, which effectively solves the problem of difficulty in starting due to excessive initial friction without changing the viscous damper itself, thereby improving the control effect of the tuned mass damping system when the structure vibrates slightly, ensuring that the small vibration of the structure can be effectively suppressed.

[0005] The technical solution of the present invention:

[0006] A new structure for connecting a viscous damper with a structure in a tuned mass damping system comprises a tension spring 1, an oscillator 2, a damper 3, a damper piston rod 4, a piston rod connecting plate 5, a connecting plate suspension spring 6 and a frame 7; the upper end of the tension spring 1 is connected to a controlled structure, and the lower end suspends the oscillator 2; the lower end of the damper 3 is hinged to the oscillator 2, and the upper end of the damper 3 is connected to the bottom of the damper piston rod 4; the top of the damper piston rod 4 is fixed to the lower surface of the piston rod connecting plate 5, the upper surface of the piston rod connecting plate 5 is connected to the controlled structure through the connecting plate suspension spring 6, the frame 7 is fixed to the controlled structure, and the piston rod connecting plate 5 is installed in the frame 7; through design, the deadweight of the piston rod connecting plate 5 and the damper piston rod 4 is slightly greater than the maximum static friction between the damper piston rod 4 and the piston wall. In the static equilibrium state, the connecting plate suspension spring 6 (with a tensile stiffness much smaller than that of the tensile spring 1) is in a tension state, and the magnitude of the tension is the difference between the deadweight of the damper piston rod 4 and the piston connecting plate 5 and the static friction of the damper. When the amplitude of the controlled structure is small, the tuned mass damping system follows the controlled structure to vibrate up and down, and the tensile spring 1, the vibrator 2, the damper 3, the damper piston rod 4, and the piston rod connecting plate 5 generate inertial force, and the combined force drives the connecting plate suspension spring 6 to expand and contract, and the vibrator 2 drives the tensile spring 1 and the connecting plate suspension spring 6 to move relative to the controlled structure, while the damper piston rod 4 is stationary relative to the damper 3. Even if the damper piston rod 4 does not consume energy by motion relative to the damper 3, the tensile spring 1, the vibrator 2, and the suspension spring 6 will consume energy during the vibration process. When the amplitude of the vibrator 2 increases to a certain extent, the piston rod connecting plate 5 contacts and collides between the upper and lower baffles of the frame 7, and the damper 3 plays an energy-consuming role, which is similar to the working characteristics of the traditional tuned mass damping system. The main difference is that when the piston rod connecting plate 5 moves between the upper and lower plates in the frame 7 without collision, the damper 3 basically does not consume energy. Once the vibrator 2 vibrates up and down, even if there is only a centimeter-level displacement, the piston rod connecting plate 5 collides with the upper and lower plates of the frame 7, which can easily overcome the static friction between the damper piston rod 4 and the damper 3, so that the damper enters the working state. Therefore, the distance between the upper and lower plates of the frame 7 is not greater than 3cm, excluding the thickness of the piston rod connecting plate 5. Since the deadweight of the piston rod connecting plate 5 and the damper piston rod 4 is slightly greater than the maximum static friction of the damper, the piston connecting plate 5 can eventually return to the initial position under ideal conditions after the controlled structure no longer vibrates. Since the static friction between the piston rod 4 and the damper 3 has a certain randomness, the piston connecting plate 5 may eventually deviate from its initial position, and may even contact the upper and lower plates of the frame 7 and apply a certain pressure. Therefore, the distance between the upper and lower plates of the frame 7 is not less than 2cm, excluding the thickness of the piston rod connecting plate 5. The tension of the suspension spring 6 is related to the position of the piston connecting plate 5, and has a certain regulating effect on the tension of the piston connecting plate 5. Even in the usual static balance state, when the piston connecting plate 5 contacts the upper and lower plates of the frame 7, the contact force is very small.

[0007] Another solution can also be adopted, in which the total weight of the piston rod connecting plate 5 and the damper piston rod 4 is slightly less than the maximum static friction force of the damper, the connecting plate hanging spring 6 and the upper plate of the frame 7 are eliminated, and the plug rod connecting plate 5 is directly stuck in the frame 7, which can also achieve the same function as the aforementioned solution.

[0008] The new structure of connecting the viscous damper and the structure proposed in the present invention essentially transforms the original rigid connection into an elastic connection or a non-connected structure in a local area, so that under the conditions of small amplitude, small acceleration and small inertia force, the inertia force can overcome the difference between the static friction force of the damper and the gravity, without affecting the vibration of the vibrator relative to the controlled structure.

[0009] There are basically no special requirements for the tension spring 1, vibrator 2, damper 3, and damper piston rod 4, which are consistent with the requirements of a traditional tuned mass damping system.

[0010] The piston rod connecting plate 5 should be made of a material that matches the material of the damper piston rod 4 so as to achieve firm fixation and reliable combination.

[0011] The connecting plate hanging spring 6 has a relatively small rigidity and can be designed according to requirements.

[0012] The frame 7 should have sufficient strength and rigidity to withstand the reaction force during operation, and its size and shape should match the piston connecting plate 5 to ensure that the horizontal displacement of the piston connecting plate 5 is effectively limited.

[0013] The beneficial effects of the present invention are as follows: (1) By improving the connection structure of the viscous damper, the problem of difficulty in starting caused by excessive initial friction of the damper piston rod is solved, so that the system can respond quickly under different vibration amplitudes and enter the working state, thereby improving the energy dissipation capacity under conditions of small vibration and low inertia force, ensuring that vibration is effectively suppressed; (2) The elastic connection design is adopted to effectively avoid the damper jamming phenomenon of the traditional rigid connection method, enhance the system's adaptability to changes in the vibration environment, and improve the system's stability and long-term reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A new structure for connecting the viscous damper to the structure in a tuned mass damping system (taking a tuned mass damper using a vertical tension spring as an example).

[0015] In the figure: 1 tension spring, 2 vibrator, 3 damper, 4 damper piston rod, 5 piston rod connecting plate, 6 connecting plate suspension spring, 7 frame. DETAILED DESCRIPTION

[0016] The following is a detailed description of the specific implementation of the present invention in combination with the technical scheme and the accompanying drawings, but the implementation of the present invention is not limited thereto:

[0017] like Figure 1 As shown, a new structure of connecting the viscous damper and the structure in the tuned mass damping system is proposed (taking the tuned mass damper using a vertical tension spring as an example), which includes a tension spring 1, a vibrator 2, a damper 3, a damper piston rod 4, a piston rod connecting plate 5, a connecting plate suspension spring 6, and a frame 7. The upper end of the tension spring 1 is connected to the controlled structure, and the lower end suspends the vibrator 2. The lower end of the damper 3 is hinged to the vibrator 2. The top of the damper piston rod 4 is fixed to the piston rod connecting plate 5. The top of the piston rod connecting plate 5 is connected to the controlled structure through the connecting plate suspension spring 6. The frame 7 is fixed to the controlled structure, and the piston rod connecting plate 5 is installed in the frame 7. The dead weight of the piston rod connecting plate 5 and the damper piston rod 4 is designed to be slightly greater than the maximum static friction between the damper piston rod 4 and the piston wall. In the static equilibrium state, the connecting plate suspension spring 6 is in a tension state. When the amplitude of the controlled structure is small, the tuned mass damping system vibrates up and down with the controlled structure, and the tension spring 1, the vibrator 2, the damper 3, the damper piston rod 4, and the piston rod connecting plate 5 generate inertial force, and their combined force drives the connecting plate suspension spring 6 to expand and contract, and the vibrator 2 drives the tension spring 1 and the connecting plate suspension spring 6 to move relative to the controlled structure. When the amplitude of the vibrator 2 increases to a certain extent, the piston rod connecting plate 5 collides between the upper and lower baffles of the frame 7, and the damper 3 plays an energy-consuming role. When the piston rod connecting plate 5 moves between the upper and lower plates in the frame 7 without collision, the damper 3 basically does not consume energy. Once the vibrator 2 vibrates up and down, even if there is only a centimeter-level displacement, the piston rod connecting plate 5 collides with the upper and lower plates of the frame 7, which can easily overcome the static friction between the damper piston rod 4 and the damper 3, so that the damper enters the working state. Since the deadweight of the piston rod connecting plate 5 and the damper piston rod 4 is slightly greater than the maximum static friction of the damper, the piston connecting plate 5 can eventually return to the initial position under ideal conditions after the controlled structure stops vibrating. If the total deadweight of the piston rod connecting plate 5 and the damper piston rod 4 is slightly less than the maximum static friction of the damper, the connecting plate hanging spring 6 and the upper plate of the frame 7 are removed, and the plug rod connecting plate 5 is directly stuck in the frame 7, the same function as the above solution can be achieved.

[0018] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any equivalent changes, modifications or evolutions made by those skilled in the art to the above examples using the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A new configuration of the connection between the viscous damper and the structure in a tuned mass damping system, characterized in that: The new structure comprises a tension spring (1), a vibrator (2), a damper (3), a damper piston rod (4), a piston rod connecting plate (5), a connecting plate suspension spring (6) and a frame (7); The upper end of the tension spring (1) is connected to the controlled structure, and the lower end suspends the vibrator (2). The lower end of the damper (3) is hinged to the vibrator (2), and the upper end of the damper (3) is connected to the bottom of the damper piston rod (4); the top of the damper piston rod (4) is fixed to the lower surface of the piston rod connecting plate (5), the upper surface of the piston rod connecting plate (5) is connected to the controlled structure through the connecting plate suspension spring (6), the frame (7) is fixed to the controlled structure, and the piston rod connecting plate (5) is installed between the upper and lower baffles of the frame (7); Ensure that the deadweight of the piston rod connecting plate (5) and the damper piston rod (4) is greater than the maximum static friction between the damper piston rod (4) and the piston wall; in a static equilibrium state, the connecting plate suspension spring (6) is in a tension state, and the tension is equal to the difference between the deadweight of the damper piston rod (4) and the piston connecting plate 5 and the static friction of the damper (3); when the amplitude of the controlled structure is small, the tuned mass damping system vibrates up and down with the controlled structure, and the tension spring (1), the vibrator (2), the damper (3), the damper piston rod (4), and the piston rod connecting plate (5) generate inertial force, the combined force of which drives the connecting plate suspension spring (6) to expand and contract, and the vibrator (2) drives the tension spring (1) and the connecting plate suspension spring (6) to move relative to the controlled structure, while the damper piston rod (4) is stationary relative to the damper (3); even if the damper piston rod (4) has no motion energy consumption relative to the damper (3), The tension spring (1), the vibrator (2) and the suspension spring 6 also consume energy during the vibration process; when the amplitude of the vibrator (2) increases to a certain extent, the piston rod connecting plate (5) contacts and collides between the upper and lower baffles of the frame (7), and the damper (3) plays an energy-consuming role; when the piston rod connecting plate (5) moves between the upper and lower baffles of the frame (7) without collision, the damper (3) basically does not consume energy; when the piston rod connecting plate (5) collides with the upper and lower baffles of the frame (7), the static friction between the damper piston rod (4) and the damper (3) can be easily overcome, so that the damper (3) enters the working state; the tension of the suspension spring (6) is related to the position of the piston connecting plate (5), and has a certain regulating effect on the tension of the piston connecting plate (5). Even in the usual static equilibrium state, when the piston connecting plate (5) contacts the upper and lower baffles of the frame (7), the contact force is very small.

2. The new structure according to claim 1 is characterized in that: The total deadweight of the piston rod connecting plate (5) and the damper piston rod (4) is made smaller than the maximum static friction force of the damper (3), the connecting plate hanging spring (6) and the upper plate of the frame (7) are removed, and the plug rod connecting plate (5) is directly stuck in the frame (7).

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