Hi guys，
Is there anybody use PATRAN and NASTRAN to simulate rotor-bearing sysytem.
After modeling the shat and meshing it, I don't know which element type can be used to
analysis the bearing than contain cross stiffness and damping coefficients.
The following is an exmple:
-------------------------------------------------------------------------------
CBUSH 1004 2002 404 0
CBUSH 1005 2002 405 0
$
$$ PBUSH Data
$
PBUSH 2002 K 6.146E8 3.635E8
B 1.274E6 9.299E5
$
DMIG KDMIG4 0 1 1 0
$
DMIG KDMIG4 404 2 404 3 -3779E3
DMIG KDMIG4 404 3 404 2 -3779E3
$
DMIG KDMIG5 0 1 1 0
$
DMIG KDMIG5 405 2 405 3 -3779E3
DMIG KDMIG5 405 3 405 2 -3779E3
$
DMIG BDMIG4 0 1 1 0
$
DMIG BDMIG4 404 2 404 3 12.9E3
DMIG BDMIG4 404 3 404 2 12.9E3
$
DMIG BDMIG5 0 1 1 0
$
DMIG BDMIG5 405 2 405 3 12.9E3
DMIG BDMIG5 405 3 405 2 12.9E3
$
--------------------------------------------------------------------------------
how can I operate in the GUI.
program is hard to be understood.
I am waiting for help.