In the optimization task editor, click the Nodal
Move tab.
Select the Nodal update strategy.
This setting controls the rate at which the
Optimization module
updates the shell thickness of design elements during the optimization using
the method of moving asymptotes. In most cases you should accept the default
setting (Conservative). However, if the design responses
are very sensitive and you have problems fulfilling the constraints, you may
need a more aggressive rate that requires more optimization iterations.
Selecting an aggressive rate may lead to unstable optimization or prevent the
optimization from converging on a solution.
Enter the Nodal move limit.
This setting limits the nodal displacement per iteration relative to
the maximum displacement prescribed (0.0 < Nodal move
limit < 1.0). The default value is 0.1. If you encounter a
difficult optimization problem that is slow to converge, you can reduce the
size of each optimization iteration by reducing the Nodal move
limit.
Note:
You prescribe the maximum displacement of a node by specifying the
height of the stiffening bead when you create a bead optimization constraint.