Random Response Fatigue Analysis cumulative damage.

BoguslawPajak

Hello, 

is it possible  create at OptiStruct Random Response Fatigue Analysis with a cumulative damage for multi axis excitation and multi PSD profile?

For the moment I'm doing Random Response Fatigue Analysis with excitation axis by axis. But I would like to get combine result of damage from excitation X,Y and Z. I know how to do this at HyperLife but I'm not interesting  to use this method. I have to do at Optistruct 

Thanks in advanced 

 

Adriano Koga_20259

I'm not really expert in Random analysis, but you probably need to add more RANDPS lines for combining all of them in the same loadcase.

Depending on what your're combining you might also need to input the CrossPSDs.

 

Hope this helps you.