Merging component nodes with the Duplicate Nodes model check command

You can use Duplicate Nodes model check command to merge coincident nodes between adjacent component FEMs in an assembly FEM. To merge nodes between adjacent component FEMs, in the Duplicate Nodes dialog box, select Merge Component FEM Nodes.

Merged node data is stored only in the assembly FEM file. The original node locations and numbering are preserved in the component FEMs.

Coincident nodes highlighted in yellow.

For best results, use Duplicate to merge nodes only when node locations in adjacent FEMs are fully coincident. Adjacent component FEMs are more likely to have coincident node locations when they are modeled with techniques such as manual meshes, mesh controls, 2D mapped meshes, 3D swept meshes, and in the case of cyclic symmetry models, 2D dependent meshes.

You can increase the tolerance value in the Duplicate Nodes dialog box to find duplicate node pairs if the adjacent meshes are nearly but not exactly coincident. However, if the tolerance value you specify when searching for duplicate nodes is too large, the merged nodes may distort your meshes.

Order of precedence when merging nodes

When you merge duplicate nodes, the software follows an order of precedence to determine which node in a duplicate node pair to retain. The following precedence applies in the context of an assembly FEM:

1. A superelement boundary node takes precedence over all other node types.

2. A node in a component FEM occurrence takes precedence over a node created in the assembly FEM.

3. A node in a loaded component FEM takes precedence over a node in a FEM occurrence whose component FEM file is not loaded.

The software follows this order of preference when merging nodes within a FEM:

1. A node on geometry takes precedence over a node which is not on geometry.

2. A node on polygon geometry takes precedence over a node on wireframe geometry, a node on a point, or a node on a mesh point on wireframe geometry.

3. A node on a mesh point takes precedence over a node on equivalent polygon or wireframe geometry.

Where do I find it?

Application	Pre/Post
Prerequisite	An assembly FEM is the current work part.
Command Finder	Duplicate Nodes
Menu	Analysis→Finite Element Model Check→Duplicate Nodes

How do I

Merge coincident nodes to connect component FEMs

Learn more

Connecting component FEMs

Example: Connecting component FEMs by merging coincident nodes

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Merging component nodes with the Duplicate Nodes model check command, 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 } });