cavva78
Mechanical
- Feb 13, 2008
- 24
Hello,
I'm looking for someone expert in random response analysis for help, since Nastran
and Femap guides are not very explicative. I try to list some doubts:
-I apply an acceleration load on 4 nodes with a PSD input (in g^2/Hz) with a model
in SI units. When I ask as output acceleration I expect to get again g^2/Hz, right?
And for displacements, forces and stresses which units do I get?
-Is it possible in some way to have a Von Mises stress as output from a random analysis?
-I was asked to calculate differential displacement output between 2 nodes as PSD
by random analysis: is there any way to do that? Is it possible to simply subtract
2 PSD displacement curves (taking absolute value)?
Thanks a lot, and any reference to tutorials or guides is helpful.
Marco
I'm looking for someone expert in random response analysis for help, since Nastran
and Femap guides are not very explicative. I try to list some doubts:
-I apply an acceleration load on 4 nodes with a PSD input (in g^2/Hz) with a model
in SI units. When I ask as output acceleration I expect to get again g^2/Hz, right?
And for displacements, forces and stresses which units do I get?
-Is it possible in some way to have a Von Mises stress as output from a random analysis?
-I was asked to calculate differential displacement output between 2 nodes as PSD
by random analysis: is there any way to do that? Is it possible to simply subtract
2 PSD displacement curves (taking absolute value)?
Thanks a lot, and any reference to tutorials or guides is helpful.
Marco
