Two-Way Radio User Manual

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SYMMETRIC MODEL GENERATION
18.54
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SYMMETRIC MODEL GENERATION: Create a three-dimensional model from an
axisymmetric or partial three-dimensional model.
This option is used to create a three-dimensional model by revolving the c ross-section of an axisymmetric
model about a symmetry axis, by revolving a single three-dimensional sector about the symmetry axis, or by
combining two parts of a symmetric three-dimensional model where one part is the original model and the
other part is obtained by reflecting the original part through a li ne or a plane.
Product: ABAQUS/Standard
Type: Model data
Level: This option is not supported in a model defined in terms of an assembly of part instances.
Reference:
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“Symm etric model generation,” Section 10.3.1 of the ABAQU S Analysis User ’s Manual
Required, mutually exclusive parameters:
PERIODIC
Use this param eter to indicate that a periodic three-dim ensional m odel must be generated
by revolving a single three-dimensional sector of the model about the symmetry axis (see
Figure 18.54–1).
Set PERIODIC=CONSTANT (default) to indicate that each generated sector in the periodic
model has a constant angle.
Set PERIODIC=VARIABLE to indicate that each generated sector in the periodic model can
have a variable angle in the circumferential direction.
In both cases each sector always has the same geom etry and mesh. The surfaces on both sides
of the original sector must be planar when PERIODIC=VARIABLE. If the surface meshes on either
side of the original sector are not matched completely, constraints between the neighboring pairs of
corresponding surfaces specified on the data lines will be applied with an automatically generated
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TIE option when the periodi c three-dimensional model is gener ated.
REFLECT
Set REFLECT=LINE to indicate that a three-dimensional m odel must be generated by reflecting a
partial three-dimensional model throu gh a symmetry line (Figure 18.54–3).
Set REFLECT=PLANE to indicate that a three-dimensional model must be generated by
reflecting a partial three -dimensional model through a symmetry plane (Figure 18.54–4).
REVOLVE
Include this parameter to indicate that a three-dimensional model must be generated by revolving
the cross-section of an axisymmetric mesh about the symmetry axis. S ee Figure 18.54–2.
18.54–1
ABAQUS Version 6.1 Module:
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