This is a one-page checklist in table format which can be used to ensure some important points are not forgotten during a modal analysis test.
Continue reading “Checklist for Experimental Modal Analysis”Finite Element Verification and Calibration Example
This is a complete example of finite element model verification and calibration (sometimes known as correlation).
The example uses a finite element model built in the free CALFEM toolbox and experimental modal analysis results of the Plexiglas plate used throughout ABRAVIBE as an example structure. The idea of this example is to be simple and illustrative, so that the techniques are not hidden by practical difficulties. The example includes verification of mode shapes using the MAC matrix and frequency tables, and calibration by adjusting the Young’s modulus to adjust the first bending mode of the FE model to fit the experimental data. You can download a paper from Sound and Vibration describing the example.
Demonstration of Convolution
Convolution is an extremely important mathematical concept if one wants to understand linear systems, or, for that matter, frequency analysis. Convolution is also, however, often a concept that many students have some difficulty grasping. Therefore, I have made this short demonstration video that I hope will clarify the concept for your. Please share this if you think it is good!
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