1、Deforming geometries from FE results with ANSYS V12.0February, 6th 2009Pierre THIEFFRYProduct ManagerANSYS, Inc.The storyThree steps:The user has a geometry (original model), performs some simulation on itThe results of the simulation provide a deformed geometryThe deformed geometry is used for subs

2、equent analyses or exported as a geometry file Constraints:Ideally, the final model should have the exact same topology as the original model (faces, edges, vertices)The user should be able to operate parametric changes on the original model and get an updated final geometryA typical application of

3、this would be the hot blade/cold blade problem found in the turbine industry: the initial CAD model is the running blade (hot shape) and the simulation has to provide the shape to be manufactured (cold shape)The workflowOnce the initial model is solved, the results are passed to the Mechanical APDL

4、system that will update the node location based on the simulation results.The deformed mesh is passed to FE Modeler for geometry synthesis. The deformed geometry (and associated mesh) are passed to the final simulation.In this example, input parameters are geometric parameters, while output paramete

5、rs are simulation results from the initial model and frequency from the deformed model analysis.The steps1. Simulation is performed on the original model2. Rst file is sent to Mechanical APDL for mesh deformation3. Deformed mesh is sent to FE Modeler for (automated) geometry synthesis4. Deformed geo

6、metry is sent to new simulation model along with deformed mesh (could also be remeshed)Exporting the geometryFor any configuration, the geometry created in FE Modeler can be exported to a Parasolid file or to ANSYS DesignModelerThe part can then be imported in a CAD package or modified in Design Mod

7、eler for further simulationStep-by-step analysisInitial simulationThe model is setup in a standard way (mesh, loads, bcs)Two additional information are required:The faces that will need to remain in the deformed shape (origfxx named selections)A command block inserted in the environment to store the

8、 components (the rst file does not contain this information). Mechanical APDLThe Mechanical APDL reads the rst file and this script is executed.The script will deform the mesh and create some groups that FE Modeler will use as face definitions for the geometry (groups of surface elements will transl

9、ate into geometric faces).FE ModelerBased on the groups created at the previous step, the geometry can be created from the mesh data.In this example, there is one named selection per original face in the initial simulation. The deformed geometry will have the same number of faces and the same topology.Simulation on deformed modelAny additional simulation can be performed on the deformed modelModel variationsVariatio