In this paper an output only modal testing and identification of a car body subject to engine excitation is presented. The response data were analyzed using two different techniques: a non-parametric technique based on Frequency Domain Decomposition (FDD), and a parametric technique working on the raw data in time domain, a data driven Stochastic Subspace Identification (SSI) algorithm. Both techniques identified 16 modes under 85 Hz. The results of the two techniques were validated against each other. It was concluded, that even though some of the identified modes showed an unsatisfactory agreement when comparing results of the two techniques, most of the modes compared well, and thus, for the main part of the identified modes the modal estimates most be considered as reliable modal parameters.
|Titel||Proceedings of SPIE : The International Society for Optical Engineering|
|Status||Udgivet - 2000|
|Begivenhed||The International Society for Optical Engineering - |
Varighed: 24. aug. 2010 → …
|Konference||The International Society for Optical Engineering|
|Periode||24/08/2010 → …|