MIRROR flag in DMIGMOD RELOC option can be used to mirror the superelement.

UD_21543
UD_21543 New Altair Community Member
edited April 15 in Altair HyperWorks


Hyperworks Tips & Tricks

 

OptiStruct – MIRROR flag in DMIGMOD command

Topic description: In OptiStruct version 2022.1, DMIGMOD RELOC option now has the MIRROR flag, which can be used to mirror the superelement. This is handled through an extension of the existing DMIGMOD RELOC functionality.

 

General Overview

MIRROR flag in DMIGMOD RELOC option to indicate that a relocation operation is mirroring.

image

When RELOC and MIRROR are used, there are two ways of defining the reflection.

  1. Define PA1, PA2, and PA3 which identify the plane of reflection about which the entire superelement will be mirrored.
  2. Define PA1, PA2, and PA3 in the residual structure and PB1, PB2, and PB3 in the super element. In that case, the super element is mirrored after being relocated.

These three grid points PAn or PBn cannot be collinear.

 

Example

An example of MIRROR usage is displayed below.

The input deck:

     image

The results:

image

Two green parts are superelements. One of them is the mirrored entity from the other.

 

For more information and to access the Altair OptiStruct DMIGMOD card help, please navigate to Help > OptiStruct > Reference Guide > Input Data > Bulk Data Section > DMIGMOD.

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