Analysis and design of high frequency periodically layered isolators in compression

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

7 Scopus citations

Abstract

Detailed finite element modal analysis of layered isolators is conducted to gain an improved understanding of three-dimensional effects in compression. Layered isolators exhibit transmissibility "stop bands", or frequency ranges with very low transmissibility. Comparison between onedimensional theory based on Floquet analysis and the three-dimensional finite element analysis indicates that stop band frequencies predicted using one-dimensional results can be highly inaccurate. Errors for isolators studied in this investigation were between 17-70%. Experimentally transmissibility measurements are obtained for two different layered isolators. Both isolators exhibit pronounced attenuation within stop band frequencies. Good correlation between three-dimensional finite element analysis and experimental data is obtained. Contrary to earlier one-dimensional analyses, material damping can play a significant role in peak attenuation levels. An efficient onedimensional analysis of layered isolators is developed. This analysis incorporates table look-up frequency corrections to account for three-dimensional elastic effects. A design optimization methodology is then developed for layered isolators subject to quasi-static stiffness constraints. A simulated annealing algorithm is employed to determine optimal material properties and layer thicknesses.

Original languageEnglish (US)
Title of host publication41st Structures, Structural Dynamics, and Materials Conference and Exhibit
StatePublished - 2000
Event41st Structures, Structural Dynamics, and Materials Conference and Exhibit 2000 - Atlanta, GA, United States
Duration: Apr 3 2000Apr 6 2000

Other

Other41st Structures, Structural Dynamics, and Materials Conference and Exhibit 2000
CountryUnited States
CityAtlanta, GA
Period4/3/004/6/00

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Building and Construction
  • Architecture

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    Szefi, J. T., Smith, E., & Lesieutre, G. A. (2000). Analysis and design of high frequency periodically layered isolators in compression. In 41st Structures, Structural Dynamics, and Materials Conference and Exhibit