Fundamental insight on the performance of a nonlinear tuned mass damper

• Published in: Meccanica (Milan) Vol. 53; no. 1-2; pp. 111 - 123
• Main Author: Gatti, Gianluca
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2018; Springer Nature B.V
• Subjects: Automotive Engineering; Case hardenability; Civil Engineering; Classical Mechanics; Mechanical Engineering; Nonlinearity; Physics; Physics and Astronomy; Stiffness; Vibration control; Vibration absorber; Mass damper; Passive vibration control; Vibration neutralizer; Nonlinear vibration
• ISSN: 0025-6455; 1572-9648
• DOI: 10.1007/s11012-017-0723-0

To try and enhance the performance of a tuned mass damper, nonlinear stiffness can be introduced to good use. In this paper, an investigation is performed on the characteristics of a nonlinear tuned mass damper when attached to a linear oscillator. The whole system is modelled as a two degree-of-freedom system with cubic stiffness nonlinearity, and the effect of the nonlinearity and mass ratio of the attachment is investigated for both a softening and a hardening stiffness characteristics, using an analytical formulation. The corresponding linear case is presented as a benchmark, and the main critical issues are discussed. Depending on the frequency to which the vibration reduction is desired, recommendations are highlighted for proper tuning and parameters selection.