Numerical Study of Forced Vibration Suppression by Parametric Anti-Resonance

0463214 - ÚT 2017 RIV PL eng J - Journal Article
Pešek, Luděk - Šulc, Petr - Půst, Ladislav
Numerical Study of Forced Vibration Suppression by Parametric Anti-Resonance.
Archives of Acoustics. Roč. 41, č. 3 (2016), s. 527-533. ISSN 0137-5075. E-ISSN 2300-262X
R&D Projects: GA ČR GA16-04546S
Institutional support: RVO:61388998
Keywords : active damping * parametric anti-resonance * external harmonic excitation
Subject RIV: BI - Acoustics
Impact factor: 0.816, year: 2016

The parametric anti-resonance phenomenon as an active damping tool for suppression of externally excited resonant vibration is numerically studied herein. It is well known fact that the anti-resonance phenomenon, i.e.the stiffness periodic variation by subtractive, combination resonance frequency, brings stabilization and cancelling into self-excited vibrations. But this paper aims at a new possibility of its application, namely a damping of externally excited resonant vibration. For extimation of its effect we come both from a characteristic exponent of the analytical solution and numerial solution of forced vibration of 2DOF linear system with additional parametric excitation. The amplitude suppression owing to the parametric anti-resonance is studied on several parameters of the system: a depth of parametric excitation, mass ratio, damping coefficient and small frequency deviations from the parametric anti-resonance.
Permanent Link: http://hdl.handle.net/11104/0262595