A variable damping tuned absorber with electro-rheological fluid for transient resonance of light structures

Electro-rheological (ER) fluids can change from a Liquid state into a solid -like gel under electrical potential. This change takes place within millis econds and it is reversible once the electrical potential is removed. The p roposed design in this investigation employs the unique characteristics of ER fluids to vary the damping of a tuned absorber. Numerical predictions fr om a simple model, and corresponding experimental observations are presente d. ER fluids hold great promise in vibration control applications. (C) 2001 Academic Press.