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Looking for help about random vibration

Posted 2025年3月10日 GMT+8 16:51 Acoustics & Vibrations, Structural Mechanics 1 Reply

Chelona Won
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Dear Community: I am performing a random vibration analysis using the Structural Mechanics module. My goal is to evaluate the 3σ (three-sigma) values for stress and displacement, but I’m unclear on how to obtain the σ (standard deviation) values from the results. Could you please guide me through the correct workflow? Thank you for your time and expertise!

1 Reply Last Post 2025年3月11日 GMT+8 16:10
Henrik Sönnerlind COMSOL Employee

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Posted: 6 months ago 2025年3月11日 GMT+8 16:10

The result that you get when you use the 'rms' operator in a random vibration analysis is the sigma value. So you just multiply by three.

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Henrik Sönnerlind
COMSOL
The result that you get when you use the 'rms' operator in a random vibration analysis is the sigma value. So you just multiply by three.

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