We are looking into Experimental Modal Analysis in one of my classes at university. The goal is to measure the Frequency Response Function and from it determine the mass and stiffness modal matrices.(adsbygoogle = window.adsbygoogle || []).push({});

But my question is the following: My professor is leading lectures with his measurements that are roughly 3-4 years old. And the first eigenfrequency of that beam at that time was about 320 Hz. Today the first eigenfrequency is 311 Hz.

So my question here is plain and simple (I did not ask my professor that because at that time I didn't think of that): Is it possible to estimate the material aging/condition by doing the EMA on a structure? Any papers on that topic?

Cheers

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# EMA: material aging

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