Mechanical APDL Basic Analysis Guide

(Axel Boer) #1
******************** MATCHED NODES ********************
Node in Node in Distance
tsolid.rst tbeam.rst
33 1 0.0000E+00
521 2 0.0000E+00
526 4 0.0000E+00
531 6 0.2220E-15
536 8 0.4441E-15
541 10 0.8882E-15
546 12 0.1776E-14
551 14 0.2665E-14
556 16 0.3553E-14
5000 50 0.0000E+00

If there is no pair of nodes within the tolerance specified (TolerN), the node matching is failing and
the MAC calculations will not be performed.


The tolerance is an absolute distance between nodes. Any pair of nodes with a distance smaller than
the tolerance is considered matched.


The tolerance value specified must be smaller than the element size. The default value is 0.01.


Only the matched nodes will contribute to the MAC calculations.


If you want to match a set of selected nodes only, you may do one of the following:



  • Write only the solutions at the desired nodes on the results file using the OUTRES command (at the
    solver level).

  • Specify a component name (Cname) on the RSTMAC command. This component must be based on the
    desired nodes.


7.3.8.2. Mapping the Nodes


First, the database corresponding to tsolid must be resumed.


Note

When comparing the nodal solutions of cyclic symmetric structures, the database must be
saved AFTER the solution is finished. The same applies when comparing solutions obtained
with the linear perturbation procedures, because the node coordinates are updated with the
base analysis displacements during the solution.

The Mechanical APDL input is:


rstmac, tsolid,1,all, tbeam,1,all, -1,,, 2

The output is:


******************** MAPPED NODES ********************
Node in Element in
tbeam.rst tsolid.rst
1 1
2 40
3 3
4 5
5 8
6 10
7 13
8 15
9 18

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