A statistical analysis of modal parameters for uncertainty quantification in structural dynamics

Pape, D. A. and Adhikari, S.
26th International Modal Analysis Conference (IMAC-XXVI), Orlando, Florida, USA, February 2007.

This paper presents modal parameters which have been extracted from frequency response data from one hundred nominally identical systems. The experimental setup used is a fixed-fixed beam arrangement, with multiple randomly placed masses added to simulate mass matrix errors, published by Adhikari et. al. [1]. In that work, they present the probabilistic characteristics of the amplitude and phase of the measured frequency response functions. These FRFs are discussed in the low, medium and high frequency ranges. In the current paper the previous work is extended to include modal parameters estimated from each of the one hundred sets of frequency response data. Statistical information, including mean and standard deviation are compiled and discussed for the low frequency (up to 1000 Hz) range. The results obtained in this work may prove useful in uncertainty quantification investigations.
BiBTeX Entry
@INPROCEEDINGS{cp31,
    AUTHOR={D. A. Pape and S. Adhikari},
    TITLE={A statistical analysis of modal parameters for uncertainty quantification in structural dynamics},
    BOOKTITLE={Proceedings of the 26th International Modal Analysis Conference (IMAC-XXVI)},
    YEAR={2008},
    Address={Orlando, Florida, USA},
    Month={February},
    Note={}
}

by Sondipon Adhikari