Magnetic control damper having high-frequency impact resistance and energy dissipation characteristic

Abstract

The invention discloses a magnetic control damper having a high-frequency impact resistance and energy dissipation characteristic, and relates to the technical field of structural vibration reduction.The magnetic control damper comprises an auxiliary piston rod, a front end cover, a main cylinder body, an auxiliary piston assembly, a connecting cylinder cover A, a semi-ring B, a MR shearing and thickening sandwich circular plate, a semi-annular baffle plate, an annular cylindrical permanent magnet, an arc-shaped permanent magnet, a main piston rod, an auxiliary cylinder body, a connected cover B, a rear end cover, a magnetorheological chamber and a MR shearing and thickening sandwich chamber. Compared with a traditional damper, the present invention overcomes the defects that a traditional viscous damper has a single working frequency and cannot effectively control different excitation frequencies, the main piston cylinder barrel is filled with an MR shear thickening material, and hasdual characteristics of magnetic sensitivity and rate sensitivity, a double-layer piston rod is adopted to realize the adjustment of the permanent magnetic field, so as to adapt to a high-frequency impact load, an MR plastic body is filled in the auxiliary piston cylinder barrel, the auxiliary piston cylinder barrel has a magnetic sensitivity characteristic, and uses an excitation coil to achievecontinuous and variable damping, so as to adapt to environments with different vibration excitation frequencies.

Description

technical field [0001] The invention mainly relates to the technical field of structural vibration reduction, and relates to a magnetically controlled damper with high-frequency anti-impact energy consumption characteristics, which is used to block vibration based on a multifunctional composite material of shear thickening and magnetorheological materials. Background technique [0002] With the development of society, the impact of vibration on the living environment and work has begun to attract people's attention. Shock and vibration are relatively common natural phenomena in military equipment, industrial production and earthquakes. In order to avoid the impact caused by shock and vibration, the energy absorption and dissipation of shock and vibration have begun to be highly valued by the society. In practical engineering, such as mechanical equipment, civil engineering, etc., vibration damping devices have played a very important role. [0003] For the traditional vibr...

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Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention proposes a magnetically controlled damper with high-frequency anti-shock energy dissipation characteristics, which overcomes the defects that the traditional viscous damper has a single operating frequency and cannot effectively control different excitation frequencies

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