Experiments with tuned absorber—impact damper combination

Tuned vibration absorber for secondary structures

In this paper, a method is presented for forced vibration suppression of multi-degree-of-freedom systems with damping. The technique pursued in this investigation is based on applying control forces at a certain number of the system's degrees of freedom. The problem is organized as an unconstrained, non-linear optimization formulation so that the peak vibration amplitudes of a certain number of degrees of freedom would be minimized. An efficient mathematical programming algorithm is used to solve this optimization problem numerically. It will be shown that the scheme illustrated in this paper is remarkably effective in reducing the vibration of the system. In particular, the vibration amplitudes at selected degrees of freedom may be diminished substantially.

Optimal vibration abatement of mechanical systems

Procedure pour structures et systemes elastiques, en calculant la reponse dynamique par un modele lineaire avec discretisation, en formulant le probleme en termes de minimisation, avec des forces externes de controle comme inconnues, obtenant ainsi un systeme d'equations lineaires; exemples, montrant la flexibilite par rapport aux methodes par modeles continues; realisation pratique par absorbeurs passifs ou actuateurs

N.D. Ebrahimi

Papers

Optimum secondary dampers for free response of underdamped systems