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Fatigue analysis

Altair Forum User

Hi to everybody,

i would like to perform a fatigue analysis using this method:

-run the dynamic analysis in Motionsolve in order to extract the load spectrum

-run the fatigue analysis in Optistruct using that load spectrum

the problem is that the dynamic analysis needs 150000 seconds, and this means an enormous amount of time in Motion solve,it's almost impossible. So is there any other way i can perform this type of analysis?

Thank you.

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Altair Forum User

Hi,

What type of Dynamic analysis would you like to do in MS and also what type of fatigue analysis?

Altair Forum User

Hi Prakash,

Thank you for answering

I want to reproduce a drum test of a wheelchair in MS, but the analysis is very long, as i said before. The resulting loads applied on the wheelchair can be considered as random loads, so i was thinking to extract the PSD of each load spectrum (should be 10 different loads conditions) and perform a Random Fatigue analysis using Optistruct. But i have not 2017 version so i didn't find a tutorial about that. Is it possible to find a tutorial for previous versions?

thank you

Altair Forum User

Hi @FP90

Not sure if you have gone through this before:

Unable to find an attachment - read this blog