Vibration analysis of structures subjected to boundary condition modifications using experimental data

Abstract

This paper addresses the Analysis of Modified Structures by using experimental data. In particular, modifications of the boundary conditions of the structure by grounding of one or several of its degrees of freedom are considered. Three methods are proposed, which are conceived to obtain the eigenvalues and eigenvectors of more constrained configurations, given the experimental Frequency Response Functions measured on a less constrained configuration. The formulations of the three methods are first presented and their performances are then evaluated through applications to an automotive structure tested in laboratory.

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