u/-M4Th0u-

I’m having a problem with my solid mechanics study in COMSOL. I’m modelling a circular tube; after carrying out a free-free eigenfrequency analysis in air, where I identified the different modes and compared the frequencies with those recorded during measurements, I realised that everything was correct. Now I’m trying to model an FRF using a frequency domain analysis with a normal point load on the tube’s surface, but I can’t reproduce the torsional modes that I do see in my experiments 🤔 I’ve tried several types of loading but can’t visualise these twist modes...

Can anyone shed some light on this?

Thanks everyone!!