Opti struct tips_and_tricks_atc
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The document discusses OptiStruct, a structural analysis solver from Altair Engineering. It can analyze and optimize structural designs for strength, durability, and noise and vibration performance. It uses finite element analysis and multi-body dynamics techniques. The document also outlines an agenda covering new features like auto-contact detection, pretension management tools, and domain decomposition parallelization. It provides examples of using these new features to simplify modeling and improve performance on large models.
Opti struct tips_and_tricks_atc
- 1. OptiStruct Tips and Tricks
- 2. Industry-proven structural analysis solver for linear and nonlinear problems Market leader for structural design optimization Based on modern finite element and multi-body dynamics technology Advanced analysis and optimization algorithms Helps develop innovative, lightweight and structurally efficient designs Analyze and optimize strength, durability and NVH performance OptiStruct is …
- 3. Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. OptiStruct: Optimization Driven Design Optimization Heat TransferNoise and Vibrations Stiffness, Strength, Stability Durability Multi Body Dynamics Smart Multiphysics
- 4. Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Agenda • Autocontact • Pretension manager • Loadstep manager • Domain decomposition • New PARAM cards • Contact output • Pretension output • Post processing
- 5. Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Auto-Contact • Automatically searches for possible contacts across selected components based on mesh proximity distance. • Creates interfaces of type CONTACT (slide, stick, freeze, friction/MU1)
- 6. Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Auto-Contact Results: • 15 Contacts • 30 Contact Surfaces • Created, reviewed and configured in under 2 minutes
- 7. Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Pretension Manager • Easier modeling and managing of pretension loads. • 1D & 3D pretension bolts • Create and edit multiple pretension sections and loads at once • Create 3D pretension bolts by selecting existing surface, or creating one on the fly. • Easy organization of pretension loads. • Hierarchical view allows easy overview of multiple loads are applied to bolts.
- 8. Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Loadstep manager Relevant loadstep information organized into folders
- 9. Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Domain Decomposition • Public Domain Engine Head and Block Assembly Model • # of Grids (Structural) : 1513492 • # of Elements : 924971 • # of Local Coordinate Systems : 32 • # of Degrees of Freedom : 4721581 • # of Non-zero Stiffness Terms : 187318216 • # of Pretension sections : 10 • Nonlinear run: small deformation, 3 subcases, 27 iterations totally
- 10. Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Domain Decomposition • Model 2 • # of Grids (Structural) : 6961212 • # of Elements : 4044294 • # of Degrees of Freedom : 21121182 • # of Pretension sections : 20 • Out-of-core • 1 MPI per physical node 0.00 10000.00 20000.00 30000.00 40000.00 50000.00 60000.00 8m6p 16m6p 32m6p time (seconds) 4.45x
- 11. Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. New PARAM cards • PARAM,SHL2MEM,YES • PARAM,ELASSTIF • PARAM,BUSHSTIF • PARAM,AUTOMSET,YES
- 12. Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Post processing • Contact results • Gasket pressure in the thickness direction
- 13. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Automated Reporting Solution Analyze • Worst case scenario • Critical components and locations exceeding the allowed thresholds • Effects of the latest design change Communicate • Share findings frequently • Right level of information • Consistent appearance Challenge Large amount of data/results Laborious repetitive tasks
- 14. Copyright © 2012 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Set-up 0.5 h Load Template, apply contour and adjust legend per component Refine/match ID’s and part/component names Verify model definition, e.g. material, properties Automated Reporting Solution Assessment 3.5 h Hotspot Finder or Measure Panel: Mark critical result locations Adjust to best view, create and save screenshot Review each component and identify critical components Report 2 h Import all screenshots into PPT master Create Overview Table Rearrange/format slides/layout
- 15. Thank You!