NAFEMS
AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Dr.-Ing. Lars Gräning,[email protected] GmbH
2L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
• Assumption: optimal design is superior to the
optimization of all disciplines in a sequence by
exploiting interaction between disciplines and groups
• Identification of trade-offs and conflicts early in the
design process
• Including multiple disciplines simultaneously increases
complexity of the optimization task
• Connection of different engineers and teams
Introduction MDO (Multi-disciplinary optimization)
Car
Safety
NVH
Durability
3L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
1. Process automation and customization
2. Efficient algorithms: meta-modeling, sensitivities,
optimization, robustness analysis and opt. …
3. Simulation and Process Data Management (SPDM)
4. Knowledge and data exchange
5. Re-use of models, workflows and scripts
Concepts and tools for an efficient and successful MDO:
Car
Safety
NVH
Durability
4L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
• Founded: 2001
• More than 60 employees, offices at Weimar, Viennaand San Francisco
• Leading technology companies Daimler, Bosch, ZF/TRW, Siemens rely on our products
Software Development
Dynardo is engineering specialist for CAE-based sensitivity analysis, optimization, robustness evaluationand robust design optimization
• Mechanical engineering• Civil engineering &
Geomechanics• Automotive industry• Consumer goods industry• Power generation
CAE-Consulting
Dynardo GmbH
5L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
optiSLang and virtual product development
• Create testing plans (DoE) for measurements
• For the evaluation of measurement data
• Can control measuring stations automatically
(Hardware in the Loop, e.g. with LabView)
• For tolerance evaluation based on CAD
• Comparison: Measurement & Simulation
• Speed up your virtual product development
• Identify optimization potentials
• Robust products in face of manufacturing
and material scattering
• Data based Reduced Order Models (ROM)
• Interface between simulation and database (PLM)
6L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Automated Workflows
„Best Practice Workflow“
for the virtual product development:
• Connect all numerical solvers to an automated
design run
• Automate CAE processes
• Connects to PLM database to get the newest
CAD data and write all necessary data back to
the database
• Integrate conditional execution for different
paths in workflow
• Run nested loops for:
– Robustness in optimization
– Performance maps
– Different load cases
– Operating windows
• Generate customized reports
Simulation Workflow
7L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
ANSA / META Integration
© Dynardo GmbH
Define Design variables Define evaluation criteria
8L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Reduced Crash Box modelCrash can
Traverse
Front bumperMounting points
• ANSA: LS-Dyna Tutorial example
• Beams are connected with a
cylindric traverse
• Front connected with double
traverse
• Evaluation of NVH: static stiffness &
Safety: front crash
• Crumble zones to control
buggling
9L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Vertical offset 1...4
Vertical Width 1...4
Width_Extend_Front_Sym
Width_Extend_Base_Sym
Height_Extend_Front_Sym
Height_Extend_Base_Sym
Design variables (Shape morphing with ANSA)
• ANSA morphing to parameterize
double beam geometry
• Compact representation to generate
geometric variations
• Elongation of front and rear can be
controled independently
• Direct morphing is used to vary
crumble zones
• Morphing techniques facilitate a
smooth deformation of the surface –
suited for design optimization tasks
10L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
ANSA integration into optiSLang
11L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
I. NVH: Stiffness
2:Fz = -10.0 kN1:Fy = 10.0 kN
II. Safety: Front Crash
Objective: minimize mass
Constraints:
• dy < 1.5 mm
• dz < 2.5 mm
Simulation: MSC Nastran
Vx=12m/s
Objective: minimize mass
Constraints:
• Fmax < 100 kN
• dmax < 340 mm
Simulation: LS Dyna
12L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
META integration into optiSLang
13L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
ANSA Solver META post
wall
crash box structure
Signed von Mises
Process automation for direct MDO
14L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
- Simulation results
- Pictures, movies, …
- Meta-model / ROMs
- Workflow + settings
- Meta-model
- …
- CAD geometry
- FE mesh
- Boundary conditions
- Material properties
- Meta-model
- …
SPDMProcess Execution & Data Management
Simulation process data management
15L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Results direct optimization with Evolutionary Algorithm
Resulting mass: 8.99 kg Computational costs: 282 simulations
16L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Process data /
information
Design data /
information
EKM
17L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
Automatic workflow with a minimum of solver runs to:
• identify the important parameters for each response
• understand and reduce the optimization task
• check solver and extraction noise
© Dynardo GmbH
Sensitivity Analysis: build Meta-model of optimal Prognosis (MoP) and identify most important design variables
18L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
Meta-model: Meta-model of Optimal Prognosis (MOP)
• Objective measure of prognosis quality
• Determination of relevant parameter subspace
• Competition of diverse Meta-Models like,Polynomials, Kriging, MLS, Neural Network, …
• Determination of optimal approximation model
• Approximation of solver output by fast surrogate model without over-fitting
• Evaluation of variable sensitivities
© Dynardo GmbH
Total CoP 82%
19L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
SPDM
Discipline:
DurabilityDiscipline:
Crash (Car Safety)
Meta-model assisted MDO
20L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Front crash
21L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Stiffness
22L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
SPDM
Meta-model
assisted
MDO
Discipline:
DurabilityDiscipline:
Crash (Car Safety)
Meta-model assisted MDO
23L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Results meta-model assisted optimization with Evolutionary Algorithm
Resulting mass: 8.68 kg (-3.7%) Computational costs: 161 simulations (Sensi + validation) (-75%)
24L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
1. Process automation and customization
2. Efficient algorithms: meta-modeling, sensitivities,
optimization, robustness analysis and opt. …
3. Simulation and Process Data Management (SPDM)
4. Knowledge and data exchange
5. Re-use of models, workflows and scripts
Concepts for an efficient and successful MDO:
Car
Safety
NVH
Durability
25L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
phone +49 (0) 3643 9008-32
Many thanks to Serafim Chatzimoisiadis and Vassilios Mazis from BETA CAE Systems for
there support regarding ANSA and META.
Acknowledgement:
Vielen Dank!
26L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
27L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
© Dynardo GmbH
Re-use and version control of processing scripts
28L. Gräning, AUTOMATION OF MULTI-DISCIPLINARY ANALYSIS PROCESSES WITH ANSA/META AND OPTISLANG
Beta CAE, 8th BEFORE REALITY Conference, May, 20.-22., Munich, Germany
Tutorial optiSLang © Dynardo GmbH
…
Workflow management, re-use and exchange