Opti struct tips_and_tricks_atc

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OptiStruct Tips and Tricks

Transcript of Opti struct tips_and_tricks_atc

OptiStruct Tips and Tricks

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 …

Copyright © 2014 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

OptiStruct: Optimization Driven Design

Optimization

Heat TransferNoise and

Vibrations

Stiffness,

Strength,

StabilityDurability

Multi Body

Dynamics

Smart Multiphysics

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

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)

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

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.

Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

Loadstep manager

Relevant loadstep information organized into folders

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

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

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New PARAM cards

• PARAM,SHL2MEM,YES

• PARAM,ELASSTIF

• PARAM,BUSHSTIF

• PARAM,AUTOMSET,YES

Copyright © 2013 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved.

Post processing

• Contact results

• Gasket pressure in the thickness direction

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

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

Thank You!