Nonlinear dynamics of a non-ideal autoparametric system with MR damper

Issue title: Nonlinear vibrations in elastic structures: Dynamics and control

Article type: Research Article

Authors: Sado, Danuta

Affiliations: Institute of Machine Design Fundamentals, Warsaw University of Technology, 84 Narbutta Street, 02-524 Warsaw, Poland. E-mail: [email protected]

Abstract: The nonlinear response of a three degree of freedom autoparametric system with a double pendulum, including the magnetorheological (MR) damper when the excitation comes from a DC motor which works with limited power supply, has been examined. The non-ideal source of power adds one degree of freedom which makes the system have four degrees of freedom. The influence of damping force in MR damper on the phenomenon of energy transfer has been studied numerically. Near the internal and external resonance region, except periodic vibration also chaotic vibration has been observed. Results show that MR damper can be used to change the dynamic behavior of the autoparametric system.

Keywords: Chaos, semiactive damping, autoparametric vibrations, non-ideal system

DOI: 10.3233/SAV-130822

Journal: Shock and Vibration, vol. 20, no. 6, pp. 1065-1072, 2013