Abstract:

Magneto-rheological (MR) elastomers are magnetorheological solid materials that are mixed with ferromagnetic particles and rubber or gel. The obvious advantages from using MR solid materials are that the particles are not able to settle down with time and that there are no need to use sealing devices. A selfcentered squeeze mode MR elastomer damper is manufactured, and the imbalance response characteristics of the dam per-flexible rotor system are experimentally studied. From the test, it is found that as the strength of applied magnetic field increases, the damping and stiffness of the damper are increased, the first critical rotational speed of the rotor system supported on the damper is increased distinctly, and the vibration at the second critical rotational speed is restrained, and using the on-off control method can control the rotor vibrations while passing through the two critical speeds. The study shows that the squeeze mode MR elastomer damper can be used in active rotor vibration control, and has the advantageous such as simple structure, stable characteristics, and distinct control results.

Key words: rotor , dynamics,  , MR , elastomer,  , damper,  , vibration , control,  , intelligent , materials