Define cyclic symmetry in Abaqus using the Manual method

The manual cyclic symmetry method lets you select both the source and target region faces.

1. Choose Home tab→Loads and Conditions group→Simulation Object Type list→Cyclic Symmetry .

2. In the Cyclic Symmetry dialog box, from the type list, select Manual Cyclic Symmetry.

3. To define the data sector source (master) and target (slave) regions, do the following:The source is the independent DOF and the target is the dependent DOF. In the Source Region group, select a region or click Create Region to create one. In the Target Region group, select a region or click Create Region to create one. Tip: To switch the source and target (master and slave) regions, click Swap Regions .

4. From the CSYS list, select the global cyclic analysis coordinate system or select User-Defined Cylindrical to create your own. The coordinate system you select must be cylindrical and its Z-axis must be collinear with the global cyclic analysis coordinate system.

5. If you selected User-Defined Cylindrical, from the Local list, select the method and create the coordinate system. For more information, see CSYS dialog box.

6. (Optional) To have the software use the designated reference coordinate system as the nodal displacement coordinate system of the target set objects, select the Set Displacement CSYS check box.

7. Set how you want to define the number of repetitive segments in the 360° structure:To let the software determine the number of segments, clear the Override Calculated Number of Segments (N) check box and in the Distance Tolerance and Angle Tolerance boxes, type the distance and angle tolerances allowed between segments. To override the values the software calculates for the number of segments, select the Override Calculated Number of Segments (N) check box and in the Number of Segments (N), type the number of segments.

8. Click Calculate Segment.

9. In the Segments group, review the angle and number of segments the software computed. The value in the Calculated Segment Angle box is the angle between the faces, and the value in the Calculated Number of Segments box is the number of segments (360° divided by the angle between the faces). For example, if the angle is 10°, the calculated number of segments is 36. The software uses the modeled geometry to automatically compute the angle and the calculated number of segments. For example, if your model is a 20.5° segment, the software displays 20.5 in the Calculated Segment Angle box. The software also computes the number of sectors based on the modeled geometry as 360/20.5 = 17.56 and displays the value in the Calculated Number of Segments box.

10. (Optional) In the Optional Parameters group, specify whether to move all tied nodes on the slave surface onto the master surface in the initial configuration, without any strain. You can then set a position tolerance that calculates a cutoff distance used to determine which nodes on the slave surface are tied to the master surface. You can also let the solver determine the position tolerance. From the Adjust Slave Nodes list, select one of the following:To move all tied nodes on the slave surface onto the master surface in the initial configuration, without any strain, select Yes.To leave the slave nodes and not move them, select No.To not specify a value for Adjust Slave Nodes, select Default.If you set the Adjust Slave Nodes list to Yes, select whether to let the solver determine the position tolerance or enter your own. To use the position tolerance set by the solver, select the Use Position Tolerance Computed by Solver check box. To enter your own position tolerance, clear the selection of the Use Position Tolerance Computed by Solver check box and type a cutoff distance in the Position Tolerance box.

11. Click OK.

How do I

Define cyclic symmetry in Abaqus using the Automatic method

Learn more

Cyclic symmetry analysis in Abaqus

Defining cyclic symmetry analysis in Abaqus

Abaqus workflow—cyclic symmetric analysis

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Define cyclic symmetry in Abaqus using the Manual method, Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });