Transcription of Support Conditions for Experimental Modal Analysis
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Support Conditions for Experimental Modal Analysis
SOUND AND VIBRATION/JUNE 2007 When Modal testing a structure for model validation, free boundary Conditions are frequently approximated in the lab to compare with free boundary-condition analyses. Free Conditions are used because they are normally easy to simulate analytically and easier to approximate experimentally than boundary condi-tions with fixed Conditions . However, the free Conditions can only be approximated in the lab, because the structure must be supported in some manner. This article investigates and quanti-fies the effects of the Support Conditions on both the measured Modal frequencies and damping factors.
10 SOUND AND VIBRATION/JUNE 2007 www.SandV.com When modal testing a structure for model validation, free boundary conditions are frequently approximated in the lab to compare with free boundary-condition analyses.
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