Abstract
For observatory of vibrations of composite rectangular plate were used two different methods: mathematical and experimental. Experimental part was done by electronic speckle pattern interferometry (ESPI). This method - ESPI - is very suitable for non-destructive observatory several types of materials - in our experiment it is composite rectangular plate. Results of this method - vibration modes - are applicable especially in designing of various structures. Results of the mathematical modelling are suitable for verifying and comparison with results from ESPI method - they are very comparisonable. In our mathematical modelling program MARC was used with help of the FEM.
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