More Related Content Similar to Opti struct tips_and_tricks_atc Similar to Opti struct tips_and_tricks_atc (20) 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
