Regions to preserve contribute to variables such as the weight and the inertia of the model. You can exclude regions that are in contact with other parts, such as regions that are used to support the model and regions that form bearing surfaces. It is required that you exclude regions to which you have applied prescribed conditions, such as faces to which you have applied pressure loads. You can use the Partition Design Space command to partition your model into separate regions. You can then select a partitioned region as a functional region. For example, you can use a partition to create a cylindrical region around a bolt hole in your model. You can then specify that the cylindrical region is a functional region, and the material surrounding the hole is preserved during the optimization. | |||||||||||