Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Vibration suppression of strongly nonlinear structure by means of nonlinear switching shunt circuits
Submission Author:
Tarcisio Marinelli Pereira Silva , SP
Co-Authors:
Carlos De Marqui Junior, Tarcisio Marinelli Pereira Silva
Presenter: Tarcisio Marinelli Pereira Silva
doi://10.26678/ABCM.COBEM2017.COB17-1173
Abstract
This work explores the suppression of undesired saddle-node bifurcations vibrations of geometrically nonlinear structures by using nonlinear switching shunt damping circuits, namely the Synchronized Switch Damping on Short-Circuit (SSDS) and the Synchronized Switch Damping on Inductor (SSDI) circuits. The focus is placed on a strongly nonlinear structure that exhibits nonlinear hardening behavior due to a predominantly cubic stiffness. To suppress vibrations associated with saddle-node bifurcations, a purely resistive linear shunting, the SSDS and the SSDI damping techniques are employed and compared with the baseline (near short-circuit) frequency response curves (up- and down-sweep) of the nonlinear structure. Experimental results show that the SSDI substantially reduce the large-amplitude branch and can entirely suppress the bifurcation of the nonlinear system up to certain excitation levels.
Keywords
vibration reduction, nonlinear structure, nonlinear circuit
