I added some new material.
An Introduction to Shock & Vibration Response Spectra Rev G
https://www.researchgate.net/publication/375280484_An_Introduction_to_Shock_Vibration_Response_Spectra_Rev_G
Tom
Here is a signal analysis package that can be freely downloaded.
https://vibrationdata.wordpress.com/2022/09/28/vibrationdata-matlab-stand-alone-executable-gui-package/
Please let me know if you have any comments or questions.
Thank you,
Tom Irvine
You should run your fixture design by the engineers or technicians who will actually be running the vibration test for a sanity check. Modal frequencies within the test frequency range are somewhat inevitable for common test items.
There are two concerns: test control stability and...
Please visit the following web page if you want to learn more about sine sweeps & PSDs:
https://vibrationdata.wordpress.com/2017/01/19/webinar-index/
The materials on this blog are free to download and were informally sponsored by NASA.
Best wishes,
Tom
The double amplitude vs. frequency plot is for a sine sweep where there is a single excitation frequency at anytime. That frequency itself varies with time, usually with a linear or logarithmic sweep rate.
PSD tests are for random vibration where a broadband of excitation frequencies occur...
I have Matlab & Python software that can do this. Free download at:
https://vibrationdata.wordpress.com/2013/05/29/vibrationdata-matlab-signal-analysis-package/
https://vibrationdata.wordpress.com/2014/04/02/python-signal-analysis-package-gui/
Tom Irvine
