In recent years many accidents happened with passengers that were out of position (OOP) when their airbag deployed. Therefore new safety regulations have come into effect in the USA and an airbag now has to meet several requirements that concern out of positioning. In meeting these requirements simulations of deploying airbags are very useful and are widely used. In OOP the airbag hits the passenger when it is still deploying and the pressure field is far from uniform and so there is a complicated interaction between gas flow and the deploying membrane. This calls for an analysis in which the dynamics of the airbag membrane is coupled with a CFD (Computational Fluid Dynamics) solver. This paper presents a new method for the simulation of multi-compartmented airbag deployment, using CFD. The value of numerical airbag simulations is that they shorten the design process and reduce the number of experiments that are needed to get to a reliable and safe end product. For multi-compartment simulations we have to consider multiple Euler domains. Each Euler domain models one airbag. Communication between the airbags proceeds via the holes that connect one airbag with the other. Holes are modeled as a piece of airbag surface that is fully porous. Given that the largest possible timestep depends on the mesh size, each Euler domain could be advanced with a specific timestep. This would require subcycling. For the multi-compartment application mesh sizes are expected to be of comparable magnitude and all Euler meshes are advanced with the same timestep. The results show that the method presented is a promising method for multi-compartment airbag simulations.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A new simulation method for airbags with multiple compartments (Adaptive Euler Domains)


    Weitere Titelangaben:

    Eine neue Simulationsmethode für Mehrkammer-Airbags (Adaptive Euler Domänen)


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2003


    Format / Umfang :

    19 Seiten, 11 Bilder, 1 Tabelle, 5 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Airbags and methods for production of airbags

    BARNES JOHN / HUNT NEIL / SHARMA VARUNESH et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Airbags

    Mahish, Sudipta S. / Das, Manoj | Tema Archiv | 2005


    Airbags flexibler fertigen - Laserschweissen von Airbags

    Laser Zentrum Hannover,DE | Kraftfahrwesen | 2007


    AIRBAGS AND METHODS FOR PRODUCTION OF AIRBAGS

    BARNES JOHN / HUNT NEIL / SHARMA VARUNESH et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    AIRBAGS AND METHODS FOR PRODUCTION OF AIRBAGS

    BARNES JOHN / HUNT NEIL / SHARMA VARUNESH et al. | Europäisches Patentamt | 2021

    Freier Zugriff