[Felt-users] Modal analysis problem

[<cv...@ya...>]

Dear Sir,

I am trying to do a simple modal analysis with WinFElt
when I ask it to solve the problem it starts to work
and never ends. Could you help me to figure out what
is going wrong?
The problem that I'm trying to solve is a simple frame
built with beam3d elements (two vertical beams and a
horizontal beam connecting the two vertical beals, and
the two vertical beams have one end fixed), you can
see the listing at the end of mail.

Thank you very much,
Cristiano


problem description
  title="portique" analysis=modal nodes=4 elements=3

analysis parameters
  mass-mode = lumped
nodes
1 x=0 y=0 z=0 constraint = fixed
2 x=0 y=1 z=0
3 x=1 y=1 z=1
4 x=1 y=0 z=1 constraint = fixed

beam3d elements
1 nodes=[1 2] material = steel
2 nodes=[2 3] material = steel
3 nodes=[3 4] material = steel

material properties
steel A=3.1416e-4 E=211e9 G=8.1154e10 Iz=7.854e-9
Iy=7.854e-9 J=15.708e-9 rho=7800

constraints
fixed Tx=c Ty=c Tz=c Rx=c Ry=c Rz=c

end


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