Validation of Gasflow Airbag Simulation Methods TNO MADYMO BV / TNO Automotive

Format:

Conference/Event

Author/Creator:

Ritmeijer, P. A., author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

For challenging cases such as airbag deployment in out of position scenarios, airbag simulation technology is being continuously enhanced. The airbag internal pressure can be calculated in different ways. The traditional scheme uses the assumption that the airbag internal pressure is uniform at any given time. This so-called Uniform Pressure (UP) method is efficient and accurate for In-Position frontal impact scenarios, when the occupant-airbag interaction takes place after the airbag is almost fully deployed, and over a relatively long time-span. However, in Out-of-Position scenarios, there is strong interaction between occupant and airbag during the airbag deployment phase and during deployment, the airbag pressure is strongly non-uniform.Complex gas flow (GF) models such as Coupled Lagrangean-Eulerian (CLE) methods and Mesh Free (MF) methods enable a physical description of the gas flow. This paper presents verification of the MADYMO gasflow method using relatively simple analytical references as well as realistic folded and unfolded airbag load cases

Notes:

Vendor supplied data

Publisher Number:

2005-01-1230

Access Restriction:

Restricted for use by site license