3D Connexion Version 6.6

*SYMMETRIC MODEL GENERATION

18.54 *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 cross -section of an axisymmetric

model about a symmetry axis, by revolving a single th ree-dimensional sector about the symmetry axis, or by

combining two parts of a symmetric three-dimensional m odel where one part is the original model and the

other part is obtained by reﬂecting the original part through a line 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 i nstances.

Reference:

•“Symmetric model generation,” Section 10.3.1 of the ABAQUS Analysis User’sManual

Required, mutually exclusive parameters:

PERIODIC

Use this parameter to indicate that a periodic three-dimensional model must be generated

by revolving a single three-dimensional sector of the model about the sym metry axis (see

Figure 18.54–1).

Set PERIODIC=CONSTANT (default) to indicate thateach generated sector in the periodic

model has a constant angle.

Set PERIODIC=VARIABLEto 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 geometry and mesh. The surfaces on both sides

of theoriginal sector must be planar when PERIODIC=VARIABLE. If the surface meshes on either

side of the originalsector are not matched completely, constraints between the neighboring pairs of

corresponding surfaces speciﬁed on the data lines will be applied with an automatically generated

*TIE option when the periodic three-dimensional model is genera ted.

REFLECT

Set REFLECT=LINE to indicate that a three-dimensionalm odelm ust be generatedby reﬂecting a

partial three-dimensional model through a symmetry li ne (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 sym metry plane (Figure 18.54–4).

REVOLVE

Include this parameter to indicate that a three-dimensional m odel must be generated by revolving

the cross-section of an axisymmetric mesh about the symm etry axis. See Figure 18.54–2.

18.54–1

ABAQUS Version 6.1 Module: ID:

Printed on: