Reply To: Harmonic analysis and resonance

[javat33489]

 

Sir, I would like to clarify, initially I had a 160×160 mm aluminum profile pipe with a height of 6 meters. And I first did a modal analysis and then a harmonic analysis from it. The first two modes always show 4-5, and in harmonic analysis at these natural frequencies it always shows strong responses, even at the slightest load. Sir, I reduced the length of the pipe to 2 meters, I made a calculation for each meter, but it always shows peaks at natural frequencies, even on a 2 meter pipe. There can be no resonance there. Why does it show like this?

Sir. I figured it out with the message above.
There will always be responses at natural frequencies. You need to watch the amplitude. The amplitude strength varies depending on the load.
Questions that I haven't answered:
1. How to understand which amplitude is sufficient and which is too large?
2. Clustering does not work (we discussed this above)