关键词: 变刚度机构, 动力吸振器, 振动抑制, 转子系统, 永久磁铁

Abstract:

：A new type of stiffness varying mechanism is proposed and adopted to suppress and absorb the excessive vibration of rotor system. The stiffness of the permanent magnet stiffness varying mechanism is analyzed based on electromagnetic theory, and the characteristics of the stiffness are studied. Then the mechanism is adopted on the vibration suppression of the rotor system and experiments are carried out to verify the effect. At last a vibration absorber contains the permanent magnet stiffness varying mechanism is proposed and numerical simulation and experiments are carried out to test the effectiveness. The results show that the proposed permanent magnet stiffness varying mechanism has the advantages of non-contactless, large stiffness, large displacement tolerance and good linearity; it is effective in rotating machinery vibration suppression and vibration absorption.

Key words: rotor system, stiffness varying mechanism, vibration absorber, vibration suppression, permanent magnet