 |
|
Validation |
At a Glance
-
Comparison:
Modal model
vs. FFT
based auto
and
cross-spectra.
-
Comparison:
Modal model
vs.
biased/unbiased
auto- and
cross-correlation
functions.
-
Modal
Assurance
Criterion,
MAC diagrams
for
comparison
of mode
shapes
between same
or different
estimation
techniques
as well as
between same
or different
projects.
-
Simultaneous
animation of
different
mode shapes,
side-by-side
and
overlapped.
-
Animation of
differences
between mode
shapes.
Modal results
validation and
comparison
The Natural
Input Modal
Analysis can be
validated by
comparing modal
results from
different
identification
techniques used
for the same
project. The
user can also
compare modes
from different
projects. For
instance, the
user can compare
a new analysis
of a mode with
an earlier
analysis of the
same mode.
Dual mode
animation
When validating
the results from
different
techniques it is
often very
helpful to
animate the mode
shapes together
or to animate
the difference
between modes.
MAC matrix
The user can
compare modes
from different
analysis by
evaluating the
Modal Assurance
Criterion (MAC)
matrix. A
convenient 3D
diagram of the
elements of the
MAC matrix helps
the user to see
how well the
modes compare.
The MAC values
are also listed
in a table.
The Modal
Assurance
Criterion
between two sets
of mode shape
estimates,
presented as a
3D figure.
Optionally, the
MAC can be
presented in a
table as well.
Flexible
graphical
facilities
All
2-dimensional
displays can be
zoomed on the
horizontal axis,
and all 3-D
displays can be
zoomed and
rotated
arbitrarily. All
displays and all
tables can be
transferred as
pictures using
copy/paste
Windows
commands, and
user comments
can be
transferred as
strings to other
applications.
Data Output
All modal
analysis results
can be stored in
Universal File
Format. The
result files can
be used in many
ways. For
instance, if the
results are
going to be used
for model
updating
refining a
finite element
analysis, the
results can be
imported
directly into a
finite element
updating package
like FEMtools.
One can also
export the modal
results in the
simple and user
friendly SVS
format.
Comparing
experimental
modes with modes
from Finite
Element analysis
It is possible
to import modes
from a finite
element analysis
if these have
been stored in
Universal File
Format. The
modes can be
imported into
ARTeMIS for
comparison of
numerical modes
with
experimentally
identified
modes.
Top & Bottom
animation of FDD
and SSI mode of
Swiss Z24
bridge.
Download movie.
Back to
Technical
Details
|
