Piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper

Abstract

The invention relates to a piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper. The piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper comprises inductive coils, a permanent magnet, a particle damping container, multi-level electromagnetic particle damping parts, piezoelectric ceramic, an insulating pad, a spring, a viscous damper, a storage battery, a current controller and partition boards (11). The permanent magnet is fixed to one side of the particle damping container, the permanent magnet and the particle damping container are isolated through the insulating pad, the inductive coils are wound around the particle damping container, the container is filled with the multi-level electromagnetic particle damping parts, and the multi-level electromagnetic particle damping parts are separated layer by layer through the partition boards. By means of the piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper, vibration energy of a building structure can be collected, utilized and consumed through the energy harvesting mode and the tuning and vibration reduction mode, and the purpose of reducing vibration amplitudes of relevant members and structures is achieved.

Description

technical field [0001] The invention belongs to the field of new energy and structural vibration reduction, and specifically relates to a piezoelectric and electromagnetic composite energy-harvesting semi-active frequency-modulating mass particle damper. Background technique [0002] At present, with the continuous increase of the height of building structures in our country, the vibration deformation of building structures under the action of wind and earthquake is also gradually increasing. It is more and more important to select dampers with sufficient damping effect to slow down the vibration of building structures. Dampers at this stage generally include spring dampers, hydraulic dampers, pulse dampers, viscous dampers, wind dampers and traditional TMD dampers, etc. [0003] The traditional TMD adjusts its vibration frequency to be close to the frequency of the main structure to change the resonance characteristics of the structure to achieve shock absorption. But the ...

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Problems solved by technology

But the traditional TMD has its shortcomings: 1) It can only control the response of a certain vibration mode of the structure (usually the first vibration mode), and the control effect is very sensitive to the frequency of the controlled vibration mode; 2) It has limited application in TMD system engineering Within the mass range, the ability to control the structure is limited, and the energy dissipation capacity is insufficient; 3) The TMD system needs to be tuned to a frequency that resonates with the controlled vibration type response, and the mass stroke of the TMD system is usually large; 4) The TMD damping adjustability is poor. Wind loads and earthquakes cannot both achieve the optimal vibration reduction effect. If the TMD is directly provided with a large damping effect under ordinary small-amplitude wind vibrations, it will make it difficult for the TMD to start vibration, the movement is slow, and the phenomenon of displacement hysteresis is prone to occur. The vibration reduction effect is not good. ideal

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