In the optimization task editor, click the
Advanced tab.
Select the Condition-based optimization
algorithm.
Select the rate at which the
Optimization module
will modify the element properties during a topology optimization. You can
select the rate (Very small, Small,
Moderate, Medium, or
Large) and allow the
Optimization module
to calculate the number of design cycles required to meet this rate.
Alternatively, you can select Dynamic and enter
the maximum number of design cycles. The minimum number of design cycles is 10,
and the default value is 15. A reduction in the number of design cycles can
lead to undesired effects in the optimization. Although the resulting
structures have the same stiffness (the sum of the strain energy is almost
equal for the different results), changing the optimization speed can cause a
different truss configuration in the solution.
Select the volume deleted after the first cycle. You can enter a
percentage or an absolute value.
By default, the
Optimization module
removes 5% of the optimization region volume in the first iteration. In some
cases increasing this starting value will accelerate the optimization without
influencing the solution, especially for models where relatively low stresses
are present in large areas. Conversely, the
Optimization module
may remove too many elements in the first iteration if the starting value is
too high, leading to a failure in the optimization or a coarse structure.
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