Studies On The Design And Analysis Of Magneto-rheological Dynamic Vibration Absorber

The vibration is a common phenomenon in the engineering practice, the harmful vibration controlhas been a hot research. The control mode is divided into passive vibration control, activevibration control and semi-active vibration control. Magnetorheological fluid is a newtype of smart materials, due to the excellent rheological properties, is used in semi-activevibration control. Magneto-rheological fluid as a variable stiffness element designsemi-active dynamic vibration absorber, can greatly reduce the vibration of the mainsystem, increase the vibration absorption band of vibration absorber and has broadprospects for engineering applications.This paper first introduces the MRF and magneto-rheological technologydevelopment status and dynamic vibration absorber technology research progress. Adynamic vibration absorber based on magnetorlogical has been proposed combination ofthese two techniques. Through discussion of magnetorheological fluid composition, itsimpact and magnetorheological fluid constitutive relation, a suitable magnetorheologicalfluid has been choosed for the magnetorheological fluid dynamic vibration absorber.According to the characteristics of the magnetorheological fluid, the basic structure ofmagneto-rheological vibration absorber has been designed, vibration absorbing the desiredperformance requirements of the magnetic flux based on the fundamental theorem of themagnetic circuit, the design of the magnetic circuit, a reasonable choice of the material ofthe part of the respective magnetic circuit, and use ANSYS to get the analysis andverification of the magnetic field of the magnetic circuit. In order to make the vibrationabsorber to have the best effect of the vibration absorbing, the principle of undamped anddamped dynamic vibration absorber under different circumstances has been discussed. Theeffect of vibration absorber stiffness, damping, dynamic quality and the main systemdamping to reduce the vibration of absorber has been discussed. The optimized designmethod of dynamic vibration absorber parameters has been designed and the results havebeen simulated using MATLAB.