Magnetic-liquid composite planar multi-degree-of-freedom tuned mass damper

Abstract

The invention provides a magnetic-liquid composite planar multi-degree-of-freedom tuned mass damper, and belongs to the field of vibration isolation. The magnetic-liquid composite planar multi-degree-of-freedom tuned mass damper comprises a magnet rotor, a non-magnetic metal plate, an elastic sheet, damping liquid, a frame, a damping adjusting assembly and a rigidity adjusting assembly. A sealing cavity is formed between the rectangular annular frame and non-magnetic metal plates parallel to each other on the two sides of the rectangular annular frame through pre-pressing thickness-variable elastic washers, the magnet rotor is arranged in the sealing cavity, and the magnet rotor is connected with the annular frame through the elastic sheet to form a resonance unit. The magnet rotor and the non-magnetic metal plates on the two sides form a magnetic eddy current plane damper. A sealing cavity between the annular frame and the magnet rotor is filled with the damping liquid, and a viscous plane damper is formed. The damping adjusting assembly is used for changing viscous damping and eddy current damping. The rigidity adjusting assembly is used for adjusting resonant frequency. The damper provided by the invention is simple and compact in structure, free of internal friction interference, stable in output damping characteristic and convenient to adjust the damping size and the resonant frequency.

Description

technical field [0001] The invention belongs to the field of vibration control, in particular to a magnetic-fluid composite plane multi-degree-of-freedom tuned mass damper. Background technique [0002] Tuned mass damper (TMD) is a passive vibration damping device widely used in recent years. Due to its simple structure, no external energy input and good stability, it is widely used in micro-vibration control and mechanical equipment damping. Vibration isolation and other fields. [0003] When the equipment is running, the operating frequency of the equipment itself may cause resonance of the system. It is usually necessary to install a tuned mass damper on the equipment to transfer the natural frequency point of the main system of the equipment, change its structural vibration characteristics, and achieve the effect of vibration reduction. . [0004] The principle of traditional tuned mass damper to adjust the structural vibration characteristics of the main system is: 1....

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned two kinds of tuning dampers have limited degrees of freedom for vibration reduction, and it is difficult to meet the vibration reduction requirements of current multi-degree-of-freedom working equipment; and the adjustment range for a single degree of freedom is small, and the damping cannot be continuously and accurately adjusted, and the installation and adjustment are difficult. Capabilities for different occasions or working conditions

In addition, the traditional viscous damper will produce uncertain friction when it works, and the non-linearity brought by friction will make it difficult to identify the vibration characteristics of the system, resulting in difficulty in adjustment and greater difficulty in vibration suppression

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