Simulating and measuring structural intensity fields in plates induced by spatially and temporally random excitation

Michael J. Daley, Stephen A. Hambric

Research output: Contribution to conferencePaper

Abstract

The structure-borne power in bending waves is well understood, and has been studied by many investigators in ideal beam and plate structures. All studies to date, however, have considered only the structural intensity induced by deterministic, localized drives. Since many structures of practical interest are excited by spatially random pressure fields, such as diffuse and turbulent boundary layer pressure fluctuations, techniques for measuring and predicting the structural intensity patterns in plates excited by such fields are presented here. The structural intensity at various frequencies in a simply-supported, baffled, flat plate driven by a diffuse pressure field is simulated using analytical techniques and measured by post-processing data from a scanning laser Doppler vibrometer and reference accelerometer using finite differencing techniques. The measured and simulated fields are similar, and show intensity patterns different from those caused by deterministic point drives.

Original languageEnglish (US)
Pages197-203
Number of pages7
DOIs
StatePublished - Jan 1 2004
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

Other

Other2004 ASME International Mechanical Engineering Congress and Exposition, IMECE
CountryUnited States
CityAnaheim, CA
Period11/13/0411/19/04

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Acoustics and Ultrasonics

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    Daley, M. J., & Hambric, S. A. (2004). Simulating and measuring structural intensity fields in plates induced by spatially and temporally random excitation. 197-203. Paper presented at 2004 ASME International Mechanical Engineering Congress and Exposition, IMECE, Anaheim, CA, United States. https://doi.org/10.1115/IMECE2004-59060