Abstract
An autoparametric vibration absorber using a spring-mass pendulum which consists of a spring and a mass is proposed in this report. The spring-mass pendulum has two resonances which appear due to a parametric resonance of the pendulum and a resonance of the spring-mass system. Two resonances of a main system are suppressed by a dynamic absorber using the spring-mass pendulum which has two resonances. Double floors structure is made as the main system and two resonances of the structure are controlled in experiment. The dynamic absorber effect is discussed by the simulation.
