About the Rim Example

This example illustrates controller-based shape optimization of a rim.

This page discusses:

About the Model

The optimization task is to lower the maximum von Mises stresses while keeping the initial volume of the rim. Further several manufacturing restrictions are considered. The new design must show rotational symmetry by 60°. The rim holes must remain stampable after optimization. CHECK_SLIDE restrictions are set on the inner and outer rim surfaces, which prevents them from violation, caused by the change of the rim holes outlines during optimization. A turnable restriction is specified for the inner and outer surfaces of the rim holes. The rim model is shown in the following figure:



The rim is modeled using 3D solid elements. Only the surface nodes of the rim holes are used as design nodes. Two load cases are considered. The loads are applied on the node in the middle of the mounting hole and transferred to the structure through RBE2 elements.

Procedure Summary

Model: rim.ext
Design Area: All nodes inside rim holes
Objective: Minimize von Mises stress
Constraint:

Maximum volume: 100%

Turnable inner and outer surface

Rotational symmetry

Stampable rim holes