User Area
> Advice
Reduce recalculation in LUSAS Modeller
In general, it will be necessary for LUSAS to recalculate/reassemble results when:
-
The results entity
plotted is changed; for example from "Displacement"
to "Force/Moment - Thick Shell"
-
When changing the
loadcase set active
-
When a results
transformation is changed
-
When the component is changed for an envelope.
-
Changing visibilty
of groups/features/elements in the model
-
Changing Results
Plots
-
When Wood Armer
options are changed
To mention a few main
reasons. On the contrary, it is not necessary to recalculate results when you are simply requesting a change of font etc.
When you plot Values
of "Displacement" and component "DX"
for example, all component results for "Displacement"
will be assembled and cached in memory. If you subsequently
plot Values of "DY", then the plot will be very
quick. If you then plot Values of "Force/Moment -
Thick Shell" and component "My" the
cached displacement results will be discarded and all results
components for "Force/Moment - Thick Shell"
cached. For efficiency when working with a large models, or
when post-processing large quantities of data with a script
then it is best to avoid changing between plots of one entity,
then another and back again, or between plots for one active
loadcase, then another and then back again. Methodical
post-processing of the model one entity at a time where possible
will reduce time spent recalculating results.
If you need to
consider different results entities at the same time for example
displacement, forces and moments, then you could plot Values of
displacement and Diagrams of moments together and both sets of
results will be assembled at the same time. This will take
longer initially, assembling results for two entities rather than
one, but if the plots are kept plotted all component results for
both entities will be cached in memory and and can all be accessed
quickly as a result.
As well as caching
calculated results in memory (RAM or Virtual Memory), Modeller
also caches results to disk in an "*.mrs" file for load
combinations and envelopes. Primary components for Envelopes
and Smart Combinations can be selected to be automatically
calculated at the end of a LUSAS Solver analysis. Settings for
these calculations can be adjusted via the "Combination
and envelope options" control in the analyses tree view.
Components listed on the Combination and envelope results
dialog are dependent upon the elements used in the model. Results
for all defined load combinations and envelopes can be optionally
calculated at any time by using the Calculate Now button. When
combination and envelope values are calculated they are stored in
a results cache for faster display of results within LUSAS
Modeller. This means that
these results can be calculated once and stored at a convenient
time whether this is started automatically immediately after
solving, or started manually at a convenient moment.
For more information, see:
Help > Help Topics
> Contents > Modeller Reference Manual > Chapter 3 - File
Types > Modeller Results Files
More on how to
speed up working with LUSAS Modeller
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