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### understanding output files

Verfasst: So 22. Mai 2011, 04:09
I have run a simple shell structue through Z88 Aurora (using element number 24), and I am trying to understand the output files .

For z88o2.txt, I assume U1, U2 and U3 are displacements in x, y, z. But what are U4, U5, U6?

For z88o4.txt (the nodal sums for each node), I assume F1, F2 and F3 are forces in x, y, z. But what are F4, F5, F6?

Below are some snippets from these files.

Cheers
Patrick

Code: Alles auswählen

``````output file Z88O2.TXT: displacements, computed by Z88R V14.0
*************
node           U(1)              U(2)              U(3)              U(4)              U(5)              U(6)

1   +0.0000000E+000   +0.0000000E+000   +0.0000000E+000   -8.0833363E-004   +4.5609021E-004   +1.1383517E-006
2   +1.8658044E-002   +5.0873483E-003   -4.1639032E-001   -7.1797109E-004   +1.7884777E-004   +2.5077511E-007

etc...``````

Code: Alles auswählen

``````output file Z88O4.TXT : nodal forces, computed by Z88R V14.0
************
#skip some stuff

the nodal sums for each node
----------------------------
node       F(1)           F(2)           F(3)           F(4)           F(5)           F(6)

1   +8.02366E+004  +4.84646E+004  +4.96441E+004  +1.35742E+000  -4.36183E+000  +3.45978E+000
2   -6.89884E-002  +4.68024E-002  +7.23812E-004  +3.08274E+001  +5.76939E+000  +7.40426E+000

etc...``````

### Re: understanding output files

Verfasst: Mo 23. Mai 2011, 12:51
Dear Patrick,

as I may quote from the theory manual (page 138):
5.24 SHELL NO.24 WITH 6 NODES
[...]
The first three degrees of freedom are the global displacements in X, Y and Z [U1, U2, U3].
The degrees of freedom 4 and 5 are the torsions on the respective node;
degree of freedom 6 is a pseudo-DOF without practical significance.
I hope that helped. For further questions, don't hesitate to ask.

Best regards,
Z81

### Re: understanding output files

Verfasst: Di 24. Mai 2011, 03:34
Thanks - I did not see that bit in the theory guide.

I looked in the theory guide, and it says (on page 139):
"Nodal forces first for each element, then for each node."

I am wondering about this last bit - "then for each node". There are six values. Is this the same as the other file, i.e. 3 forces in x,y,z, 2 torsion forces, and one extra number without significance?

### Re: understanding output files

Verfasst: Di 24. Mai 2011, 13:02
Dear Patrick,

the integrated nodal force processor of Z88 Aurora (Z88R) internally uses the calculated
deflections and stores the computed nodal forces in Z88O4.TXT.
But the "forces" of the DOF 4, 5 and 6 are really moments, because the DOF 4, 5 and 6
are the rotational DOFs.

Regards,
Z81

### Re: understanding output files

Verfasst: Fr 27. Mai 2011, 04:30
thanks for the clarification

### Re: understanding output files

Verfasst: Fr 27. Mai 2011, 07:18
You're welcome!

Best regards,
Z81