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Nastran / Frequency Response / Free-Free
There are examples of using SOL 108 and SOL 111 to create a frequency response. In Siemens Simcenter (NX Nastran), the examples focus on a tower with a seismic mass. The model drives the mass with a …
1
vote
How to get natural frequencies from accelerometer measurements?
I've done this before. I had to be pretty careful to generate the FRF.
It helped me to know the input (force vs. time) and the output (acceleration vs. time). I have done it without knowing the i …
2
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3
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Do internal / external stresses affect modal frequency?
Imagine a cantilevered beam, fixed on one end and with a tension line connecting the other end to ground (e.g. perpendicular to the length of the beam).
If I increase the tension, does the modal freq …