LA4
Aerospace
- May 6, 2016
- 2
Hello,
I am currently using ABAQUS 6.13 to compute the response of a structure to a given acceleration (base motion) of which I know the PSD.
The analysis runs without any problem, but I cannot find in the output the cross-PSD (or covariance) between the different stress tensor components.
These are needed to apply the Projection-by-Projection method to compute the fatigue damage (Cristofori & Benasciutti 2014).
I do see that ABAQUS provides the PSD of von Mises stress, and the auto-PSD of each single stress tensor PSD(S11,S11), PSD(S22,S22), etc. but not the cross-PSD (covariance), such as PSD(S11,S22), PSD(S11,S33) etc.
It seems that this is possible in ANSYS, even though I don't have access to this software.
I have two questions:
1) Is this output available in ABAQUS?
2) If the answer to question #1 is yes, do you have any suggestion about how to do it?
Thank you.
I am currently using ABAQUS 6.13 to compute the response of a structure to a given acceleration (base motion) of which I know the PSD.
The analysis runs without any problem, but I cannot find in the output the cross-PSD (or covariance) between the different stress tensor components.
These are needed to apply the Projection-by-Projection method to compute the fatigue damage (Cristofori & Benasciutti 2014).
I do see that ABAQUS provides the PSD of von Mises stress, and the auto-PSD of each single stress tensor PSD(S11,S11), PSD(S22,S22), etc. but not the cross-PSD (covariance), such as PSD(S11,S22), PSD(S11,S33) etc.
It seems that this is possible in ANSYS, even though I don't have access to this software.
I have two questions:
1) Is this output available in ABAQUS?
2) If the answer to question #1 is yes, do you have any suggestion about how to do it?
Thank you.