2 THE
Z88 MODULES
2.1 THE
DIRECT CHOLESKY SOLVER Z88F
NOTE:
Always
compare FEA calculations with analytical rough calculations, results of
experiments, plausibility considerations and other tests without
exeption !
The principal task of every
FEA program is the calculation of the displacements. That's the job of
Z88F.
The calculated deflections are the starting point for a stress
calculation with
Z88D or nodal force calculation with Z88E.
Z88F is the right solver
for small structures. For
large structures launch the sparse matrix
solver Z88I1
and Z88I2.
Note: The files Z88I1.TXT , Z88I2.TXT and Z88I5.TXT
mentioned here are described more precisely in chapter 3.
(1)
Compute Mode
Windows:
Z88F > Mode > Compute Mode, Compute > Go
UNIX:
z88f -c (console) or Z88F -C (Z88COM)
Input files:
Z88I1.TXT (general
structure data)
Z88I2.TXT (boundary conditions, constraints)
Z88I5.TXT (surface and pressure loads), if needed
Output files:
Z88O0.TXT
(processed structure data for documentation)
Z88O1.TXT (processed boundary conditions for documentation)
Z88O2.TXT (deflections)
In addition two binary
files Z88O1.BNY and Z88O3.BNY are generated. These binary files are
later used
by Z88D (stress processor) and Z88E (nodal force processor).
(2)
Test Mode
Windows:
Z88F > Mode > Test Mode, Compute > Go
UNIX:
z88f -t (console) or Z88F -T (Z88COM)
Input files:
Z88I1.TXT (general
structure data)
Output files:
Z88O0.TXT
(processed structure data for documentation)
Only the file Z88O0.TXT
(processed structure data for documentation) is produced along with the
memory
needs for total stiffness matrix and coincidence vector plotted on the
screen. Use
this mode for
> Checking the memory needs for MAXGS and MAXKOI.
> Checking if Z88F interprets Z88I1.TXT correctly and, as requested,
puts
the data in Z88O0.TXT.