EFFECT OF MISSING PATH AND FORCE ON VIBRATION RESPONSE PREDICTION

Year 2016, Volume: 12 Issue: 1, 80 - 89, 24.04.2016

Hakan Uçar

Abstract

Accurate
prediction of the vibration responses is an essential requirement during the
design and optimization stages of mechanical structures. For this reason, a
vibration response prediction (VRP) methodology, based on a set of frequency
response functions (FRF) and operational responses, is established. In this
methodology, defining the sources and transmission paths of the structure
accurately is critical. Since it is based on the FRFs of the system,
unconsidered sources and/or missing path result in inaccurate predictions. The
goal of this paper is to present the effect of a missing path on the prediction
results. In accordance with this purpose, a three degree-of-freedom system will
be investigated analytically and VRP methodology will be applied along with the
calculated receptances and displacements of the system.

Keywords

vibration response, matrix inversion, cross-coupling, 3 DOF systems

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