Acoustic excitation of a flanged joint

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

Abstract

Bolts, screws, rivets, and pins can significantly complicate the prediction of damping, stiffness, and resonance frequencies of built-up systems. Because the interaction of interfacial joints is not well understood, current predictive models incorporating fastened joints often require over-designing for safety. To better understand the behavior of fastened joints, several experiments have been performed on a built-up structure with two rectangular 1/4" plates fastened together by two screws on a 1/2" thick flange. The structure was excited via acoustic excitation, and acceleration was measured at multiple locations on the flange and plate during and after ensonifying. While the energy input to the system may be lower for acoustic excitations than other direct contact methods, the results in this paper show that ensonifying the structure has two important advantages over traditional impact hammer and shaker methods. First, resonances of the structure can be excited and analyzed individually in both steady state and free-decay conditions, which is an advantage over impact excitation. Second, the excitation method is non-intrusive and does not change the system properties, which is an advantage over shaker excitation. The proposed method is shown to be an effective way to excite structures for both steady-state and decay measurements.

Original languageEnglish (US)
Title of host publicationNonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018
EditorsGaetan Kerschen
PublisherSpringer New York LLC
Pages211-224
Number of pages14
Volume1
ISBN (Print)9783319742793
DOIs
StatePublished - Jan 1 2019
Event36th IMAC, A Conference and Exposition on Structural Dynamics, 2018 - Orlando, United States
Duration: Feb 12 2018Feb 15 2018

Other

Other36th IMAC, A Conference and Exposition on Structural Dynamics, 2018
CountryUnited States
CityOrlando
Period2/12/182/15/18

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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  • Cite this

    Jerome, T. W., Shepherd, M. R., & Hambric, S. A. (2019). Acoustic excitation of a flanged joint. In G. Kerschen (Ed.), Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018 (Vol. 1, pp. 211-224). Springer New York LLC. https://doi.org/10.1007/978-3-319-74280-9_23