Self-excited two-mass system with soft impacts

摘要

To a basic one-mass self-excited system a tuned absorber is attached the motion of which is influenced by soft impacts. The self-excitation is considered as that of the van der Pol type. The stops are symmetrically situated to the absorber mass equilibrium position. The results of numerical simulation are presented in diagrams showing a certain ratio of extreme deflections of the basic system in dependence on the tuning coefficients of the tuned absorber. This ratio of maximal extreme deflections of the basic system to the amplitude of the system without absorber is the measure of the tuned absorber's efficiency. The following effects are investigated: the ratio of the absorber mass to the basic system mass, the distance of the stops, absorber motion damping, and damping in the stops. Generally the stops do not represent a favourable effect.