Optimum Configuration for Vibration Absorbers of a SDOF System Using Genethic Algorithm

Dynamic vibration absorbers are widely used for passive control of vibration. Classically, a simple dynamic vibration absorber consists of a mass and a spring attached to a vibrating body which vibrates in a narrow-band frequency range. When correctly tuned, the dynamic vibration absorber suppresses the motion of the point to which it is attached. In this paper different models for the vibration absorbers are suggested to find the optimum one for suppressing the vibration of a single degree of freedom system due to the ground motion. The genetic algorithm method is used to optimize the best model of the absorber. It is shown that when one damper and one spring are used between the primary mass and the absorber mass and one damper and one spring between the absorber mass and the ground the optimum results are obtained.