WS6-1 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation WORKSHOP 6 ADVANCED SURFACE MESHER TESSELLATED SURFACES

WS6-2 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation

WS6-3 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation WORKSHOP 6 – ASM TESSELLATED SURFACES

WS6-4 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation Problem Description From a set of simple non-congruent surfaces create a good quality congruent quadralateral element mesh The incongruency is due to gaps and vertices for adjacent surfaces not matching (vertices not coincident) Use the MSC.Patran advanced surface mesher (ASM) Use tessellated surface version Use MSC.Patran 2005 WORKSHOP 6 – ASM TESSELLATED SURFACES

WS6-5 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation General outline of analysis steps Use the tessellated surface version of the ASM in MSC.Patran 2005 This is the pre-release version, so use the following in the initialization file settings.pcl pref_env_set_logical( asm2_enable, TRUE ) When MSC.Patran 2005 is run, the ASM form should look like the following Follow the steps described in the course notes for the ASM, tessellated surface version Import the original surfaces in an MSC.Patran neutral file WORKSHOP 6 – ASM TESSELLATED SURFACES

WS6-6 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation General outline of analysis steps (continued) Add a hole to two surfaces Create initial tessellated surfaces Smallest edges are closed Observe free surfaces edges Close small gaps using Cleanup / Auto Stitch Close larger gaps using Edit / Fill Hole Delete a surface using Edit / Delete Surface Close the circular holes using Edit / Fill Hole Combine (add) 3 surfaces using Edit / Merge Surfaces Combine (add) 15 surfaces using Edit / Merge Surfaces Create final Quad mesh using Final Mesh WORKSHOP 6 – ASM TESSELLATED SURFACES

WS6-7 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation General outline of analysis steps (continued) Display free element edges Determine association of elements to geometric surfaces Delete unwanted surface edge vertices Create mesh seeds on some surface edges Paver mesh the tessellated surfaces WORKSHOP 6 – ASM TESSELLATED SURFACES

WS6-8 PAT328, Workshop 6, September 2004 Copyright 2004 MSC.Software Corporation