Detailed simulation of the airbag inflation process using a coupled CFD/FE method

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Detailed simulation of the airbag inflation process using a coupled CFD/FE method

Detailed simulation of the airbag inflation process using a coupled CFD/FE method

Steenbrink, A.C. / Fairlie, G.E.

Airbag design is nowadays performed for an increasing number of scenarios. Evaluations are not only done for frontal impact but also for side impact and out-of-position impact loading conditions. The numerical simulation of these scenarios is particularly difficult as the occupant is interacting with the airbag at early times during the airbag deployment. Therefore the detailed description of the unfolding behaviour of the airbag is crucial. A new airbag inflation simulation capability that overcomes this problem has been integrated into the crash simulation software MADYMO. This allows accurate simulation of the gas flow within the airbag throughout the inflation and unfolding process. The new module uses CFD techniques to numerically model the interior volume of the airbag in detail. The pressure field within the airbag is directly coupled to the standard MADYMO FE model of the airbag. Hence, the kinematics of the airbag and its contacting objects can be predicted more accurately.

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Title :

Detailed simulation of the airbag inflation process using a coupled CFD/FE method

Additional title:

Detaillierte Simulation eines Airbag Aufblasvorganges durch gekoppelte CFD/FE Methoden

Contributors:

Steenbrink, A.C. (author) / Fairlie, G.E. (author)

Published in:

Berechnung und Simulation im Fahrzeugbau - Numerical Analysis and Simulation in Vehicle Engineering, 2000 ; 341-349

VDI-Berichte ; 1559

Publication date :

2000

Size :

9 Seiten, 6 Bilder, 1 Tabelle

ISBN :

ISSN :

Type of media :

Conference paper

Type of material :

Print

Language :

English

Keywords :

Airbag , Aufblasen , Finite-Elemente-Methode , Kinematik , Modellsimulation , numerische Strömungssimulation , numerisches Verfahren , Sicherheitseinrichtung (Fahrzeuginsasse) , Simulationsmodell

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