Identification of Modal Parameters in Frequency Domain with Emphasis on Output Only Cross-Spectral Density Functions Becchis-Osiride s.r.l

Format:

Conference/Event

Author/Creator:

Giovanni, Visconte, author.

Conference Name:

SAE 2007 Noise and Vibration Conference and Exhibition (2007-05-15 : St. Charles, Illinois, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

This paper presents a technique for extracting modal parameters of a linear multi degree of freedom system in the frequency domain. The roots of the technique are the well known rational fraction polynomials method but emphasis is given to the application to output-only data in the form of cross-spectral density functions. A discussion is presented on the possibility of achieving reliable results also for structures undergoing multiple input excitations. Numerical stability of the technique is obtained by properly scaling both the frequency and the cross-spectrum axes. Good performance of the method are shown for numerical examples and for a test case on an actual structure

Notes:

Vendor supplied data

Publisher Number:

2007-01-2382

Access Restriction:

Restricted for use by site license