Mechanical APDL Basic Analysis Guide

Figure 9.4: Nested Assembly Schematic

STATOR

PERMMAG

ROTOR

WINDINGS

MOTOR

AIRGAP

STATASM

ROTORASM

Assuming that the assembly ROTORASM and components STATOR, PERMMAG, and AIRGAP have been
defined, the commands to define the assembly MOTOR would look like this:

CMGRP,STATASM,STATOR,PERMMAG

CMGRP,MOTOR,STATASM,ROTORASM,AIRGAP

See the Command Reference for more information about the CMGRP command.

9.3.3. Selecting Entities by Component or Assembly

The main advantage of defining a component or an assembly is that you can conveniently select items
that belong to it using a combination of the CMSEL and ALLSEL commands. The CMSEL command
selects all entities belonging to a component or assembly by its name. You can then issue ALLSEL,BELOW
to select all attached lower entities. For example, you can select all elements belonging to the WINDINGS
component, apply a current density loading to all of them, and then select all nodes attached to those
elements:

CMSEL,,WINDINGS

BFE,ALL,JS,,-1000

ALLSEL,BELOW,ELEM

You can also use the picker to select components. By choosing Utility Menu> Select> Comp/Assembly>
Pick Comp/Assembly, you can select a defined component and all of the items belonging to it.The
item is displayed in the prompt window during the select process.

For more information about the CMSEL,BFE and ALLSEL commands, and the CMEDIT,CMDELE, and
CMLIST commands mentioned below, see the Command Reference.

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Selecting and Components