Modal response of interior mass based upon external measurements

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Modal response testing has been used to predict the motion of interior masses of a system in which only external instrumentation is allowed. Testing of this form may occasionally be necessary in validation of a computer model, but also has potential as a tool for validating individual assemblies in a QA process. Examination of the external frequency response and mode shapes can offer insight into interior response. The interpretation of these results is improved through parallel analytical solutions. A simple, three-mass model has been examined experimentally and analytically to demonstrate modal theory. These results show the limitations of the external ... continued below

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579 Kilobytes

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Chow, C T; Eli, M; Jorgensen, B R & Woehrle, T October 12, 1999.

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Description

Modal response testing has been used to predict the motion of interior masses of a system in which only external instrumentation is allowed. Testing of this form may occasionally be necessary in validation of a computer model, but also has potential as a tool for validating individual assemblies in a QA process. Examination of the external frequency response and mode shapes can offer insight into interior response. The interpretation of these results is improved through parallel analytical solutions. A simple, three-mass model has been examined experimentally and analytically to demonstrate modal theory. These results show the limitations of the external measurement in predicting internal response due to transmissibility. A procedure for utilizing external testing is described. The question posed through this research is whether or not modal correlation analysis can be adapted for use in systems for which instrumentation of critical components is missing.

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579 Kilobytes

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  • International Modal Analysis Conference, Kissimee, FL, February 9-12, 1999

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  • Other: DE00007807
  • Report No.: UCRL-JC-133059
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 7807
  • Archival Resource Key: ark:/67531/metadc715295

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  • October 12, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • May 6, 2016, 11:29 p.m.

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Chow, C T; Eli, M; Jorgensen, B R & Woehrle, T. Modal response of interior mass based upon external measurements, article, October 12, 1999; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc715295/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.