Comparison of various techniques for computing modal mass

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we compare modal mass estimates from a resonance frequency shift technique with those estimated using traditional drive point response matching and mode shape integration techniques. The data for the computations was derived from experimental modal analyses of a small homogenous, carbon fiber composite rectangular flat plate with free boundary conditions. We applied several point masses to the plate to obtain modal frequency shifts. For this problem, the modal masses computed using the frequency shifting technique are slightly higher than those estimated using traditional methods. The overestimates may be due to ignoring the effects of the added mass inertias. Also, the results show that the modes of the plate become distorted when the added masses are greater than approximately 0.6% of the structure's static mass, thus invalidating the frequency shift technique.

Original languageEnglish (US)
Title of host publicationInstitute of Noise Control Engineering of the USA - 22nd National Conference on Noise Control Engineering, NOISE-CON 2007
Pages1704-1712
Number of pages9
StatePublished - Dec 1 2007
Event22nd National Conference on Noise Control Engineering, NOISE-CON 2007 - Reno, NV, United States
Duration: Oct 22 2007Oct 24 2007

Publication series

NameInstitute of Noise Control Engineering of the USA - 22nd National Conference on Noise Control Engineering, NOISE-CON 2007
Volume3

Other

Other22nd National Conference on Noise Control Engineering, NOISE-CON 2007
CountryUnited States
CityReno, NV
Period10/22/0710/24/07

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Goss, A., Hambric, S., & Fahnline, J. (2007). Comparison of various techniques for computing modal mass. In Institute of Noise Control Engineering of the USA - 22nd National Conference on Noise Control Engineering, NOISE-CON 2007 (pp. 1704-1712). (Institute of Noise Control Engineering of the USA - 22nd National Conference on Noise Control Engineering, NOISE-CON 2007; Vol. 3).