RADIOSS –MADYMO coupling -...
Transcript of RADIOSS –MADYMO coupling -...
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Agenda
What is Coupling?
Examples
When to use Coupling?
Licensing
Benefits
MPP Coupling
Coupling Assistant
Questions
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What is Coupling?
FE crash codes are typically used for structural design• Accurate predictions of deformations, but long run times
MADYMO is specialized in restraint design & optimization• Fast run times & accurate dummy models
TASS aims to offer its customers the best of both worlds by harmonizing MADYMO with FE crash codes through a plug & play solution
Structural Design & Verification Occupant SafetyDesign & Optimization
Plug & Play
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What is Coupling?
① FE data (nodal positions) is sent to MADYMO every time step.
② MADYMO makes a copy of the coupled Radioss FE objects.
③ Contact evaluations / Constraints are performed in MADYMO.
④ Calculated forces are sent back to Radioss.
Positions
Forces
MADYMO Radioss
Importedmesh
Radiossmesh
MADYMOSurface(MB,FE)
Contact
Support
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Radioss FE vehicle model
MADYMO Dummy
Example
Frontal impact
MADYMO airbag + MADYMO belt
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simulationexperimental data
Radioss FE seat model
MADYMO Dummy + Belt
Example
Rear impact
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When to use Coupling?
A vehicle development is usually comprised of integrated numerical simulation activities that are combined in such a way that project targets are achieved in the most efficient way.
Phases identified within development:• Concept
• Design
• Development Validation (DV)
• Product Validation (PV)
• Certification
Concept Design DV PV CertificationSOP
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When to use Coupling?
Within each development cycle a number simulation activities areperformed
• Vehicle structure and its related components (seats, instrument panel…)
• Restraint system
The structural development team has need to integrate the outcome of the restraint system development within its numerical model to assess the vehicle performance
Virtual developments
MADYMO
RADIOSS
Physical sled Tests
Translate to FE software
Virtual full vehicle test
Physical full vehicle test
Is my restraint still correlated?What is the transfer function from my MADYMO dummy to my FE dummy?
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When to use Coupling?
Coupling allows• Usage of the same dummy within the structural development and within the
restraint system development
• Focus on restraint system development without having to account for translation phases every time a new restraint is available
Virtual developments
MADYMO
RADIOSS
Physical sled Tests
Translate to FE software
Virtual full vehicle test
Physical full vehicle test
Coupling
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Licensing
All MADYMO products are now using token licensing giving the customer maximum flexibility
When ONLY the dummy is used in coupling the solver license is not necessary anymore
• 21 MADYMO token
or
• 2001 GWU via Altair partner program
Tokens
In all codesAll dummies
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Benefits
Consistency• Reduced risk of design conflicts because one validated restraint system model
can be used throughout the entire design process.
Efficiency• No need to translate and re‐validate the dummy and restraint models in the
verification phase.• If CPU time is dominated by the FE dummy model, the use of MADYMO ellipsoid
or facet models can reduce the total CPU time.
Quality• Proven accuracy of the MADYMO dummy and restraint models.
Robustness• MADYMO dummy models are numerically stable, so multiple re‐runs of a
simulation to resolve FE dummy model stability issues no longer needed.
Flexibility• All dummy models, human models and pedestrian models are available for all FE
codes using a token licensing system.
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Benefits: MADYMO dummy library
Frontal impact dummies
Side impactdummies
Child dummies
Rear impactdummies
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Benefits: MADYMO human model library
Human adultmodels
Human childmodels
Pedestrian models
3yo 6yo 50th5th 95th
5th 50th 95th
1.5yo 3yo 6yo 10yo
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Benefits: MADYMO impactor library
FMVSS201 headform
ACEA headform
EEVC WG17 adult and child headforms
JARI adult and child headforms
Complete legform impactor
Upper legform impactor
ECE‐R12 bodyblock
H‐Point manikin
Headform impactors Legform impactors Body impactors
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MPP Coupling
The traditional Radioss – MADYMO direct coupling showed sub‐optimal performance when running coupled simulations on MPP machines
Direct coupling• Radioss in MPP
• MADYMO on single CPU
• Communication between codes on 1 node RadiossRadioss
RadiossRadioss
MADYMO
FE‐MAD
FE‐
FE
FE‐
FEFE‐FE
FE‐FE
= High Performance Network
= Data Exchange
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MPP Coupling
A new MPP “indirect” coupling interface has been developed by Altair and TASS
MPP coupling• MADYMO in MPP
• Data exchange in MPP
• Parallel communication
Increased ease‐of‐use
Wider platform support
= Separation of programs via coupling library
MADYMO
FE‐codeFE‐MAD
FE‐FE
MADYMO
FE‐code
FE‐codeMADYMO
FE‐codeFE‐MAD
FE‐MAD
FE‐MAD
FE‐MAD
MAD‐MADFE‐FE
FE‐MAD
MAD‐MADFE‐FE
= High Performance Network
= Data Exchange
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MPP Coupling
The new communication interface consists of two parts:• High‐level coupling protocol:
The coupling protocol describes which data is sent and how this data is structured. This protocol is based on the current coupling interface.
• Low level coupling library:The coupling library handles all communication between the MADYMO processes and the external FE processes.
= Separation of programs via coupling library
MADYMO
FE‐codeFE‐MAD
FE‐FE
MADYMO
FE‐code
FE‐codeMADYMO
FE‐codeFE‐MAD
FE‐MAD
FE‐MAD
FE‐MAD
MAD‐MADFE‐FE
FE‐MAD
MAD‐MADFE‐FE
= High Performance Network
= Data Exchange
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MPP Coupling
Benchmark with model incl. MADYMO dummy, airbag and belts shows a 30% ‐ 50% runtime improvement against the ‘traditional’coupling.
Coupling Benchmark
0%
20%
40%
60%
80%
100%
120%
x MAD-4RAD x MAD-8RAD x MAD-16RAD x MAD-31RAD
Old Coupling MPP Coupling
Coupling Benchmark
0:00:00
3:00:00
6:00:00
9:00:00
12:00:00
15:00:00
18:00:00
21:00:00
24:00:00
x MAD-4RAD x MAD-8RAD x MAD-16RAD x MAD-31RAD
Old Coupling MPP Coupling
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Coupling assistant
Dedicated application for preprocessing of coupling models
• MADYMO and Radioss model overlay
• Unit scaling
• Graphical positioning
• Contact definitions
• Constraint definitions
• MADYMO Belt fitting
Graphical Interface is aimed at FE users with little or no knowledge of the MADYMO XML format. No need for FE expert to learn MADYMO input format.