Vol.5, No 1, 2008 pp. 39 - 48
UDC 534.1:534.121:534.28:534.21
ON THE RELATIVE AND ABSOLUTE TRANSMISSIBILITY
OF
A VIBRATION ISOLATION SYSTEM SUBJECTED TO
BASE EXCITATION
Ivana Kovacic1, Zarko Milovanovic2,
Michael J Brennan3
1Department of Mechanics, Faculty of
Technical Sciences, Trg D. Obradovica 6, 21000 Novi Sad, Serbia
2Faculty of Technical Sciences, Trg
D. Obradovica 6, 21000 Novi Sad, Serbia
3Institute of Sound and Vibration Research,
University of Southampton, Southampton SO17 1BJ, United Kingdom
Abstract. In this paper a one-degree of freedom passive vibration
isolator system which is subject to harmonic base excitation is analyzed.
The isolator is modellled as a parallel combination of a stiffness and
damping element with cubic non-linearity. The method of averaging is used
to obtain the steady-state harmonic response. A parametric analysis is
conducted in order to investigate the influence of the system parameters
on the relative and absolute transmissibility of the system from the viewpoint
of possible improvement of the transmissibility of a system with linear
viscous damping.
Key Words: Isolation, Base Excitation, Damping, Transmissibility
O RELATIVNOJ I APSOLUTNOJ PRENOSIVOSTI
VIBRO- IZOLACIONOG SISTEMA SA KINEMATSKOM POBUDOM
U ovom radu se razmatra pasivni izolator vibracija sa jednim stepenom slobode
sa harmonijskom pobudom osnove. Izolator se modeluje paralelno vezanom
linearnom oprugom i prigušnicom kubne nelinearnosti. Metod osrednjavanja
se koristi za određivanje stacionarnog harmonijskog odziva. Sprovodi se
analiza uticaja parametara sistema na relativnu i apsolutnu prenosivost
sa stanovišta mogućeg poboljšanja ovih karakteristika u odnosu na izolacione
karakteristike sistema sa linearnim viskoznim prigušenjem.
Ključne reči: Izolacija, Kinematska pobuda osnove, Prigušenje,
Prenosivost
