BACK Checking and improving finite-element models for vibration analysis

Holographic measurement of vibration modes is a powerful tool for checking finite-element modelization, by comparing experimental and numerical results. See, for example, all of  the 1st-10th, the 11th-20th, and the 21st-30th holographically detected vibration modes of a rectangular steel plate. Both the holographically measured and the finite-element predicted amplitude distributions are presented. The relative error in resonant frequencies as predicted by FE modelling averages 1.7 %, before making the corrections suggested by holographic testing. These corrections improve the F.E. element choice, the boundary conditions, the values and eventual anisotropies of material properties token into account in the finite-element calculations.
 

Holographic modal analysis of engineering components  

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