The development of new protective systems must be performed on tools reliable and representative of alive human. In an earlier study, a simplified but realistic modelling of the head-neck system under moderate rear impact was performed. In order to address this issue, an original lumped model of the human torso was developed and coupled to a car seat-head rest complex. The experimental modal analysis of the human torso in a seating position performed by Kitazaki in 1992 [Paper presented at the United Kingdom Meeting on Human Response to Vibration held at I.S.V.R. University of Southampton, Southampton, UK, 28-30 September 1992.] was used in the present study for the identification of the mechanical parameters of a lumped human torso model. Despite its low complexity, this model was able to reproduce the five first experimental vibration modes and it was possible to validate it in terms of natural frequencies, damping ratio and mode shapes. In addition to the lumped approach, an external geometry of the human torso was implemented in order to provide a realistic coupling of the human body model to a finite element model of the car seat also developed in the present study. A parametric study was finally carried out in order to evaluate the influence of the torso behaviour and of the different parts of a car seat on the mechanical neck response under rear-end impact. The results of this study allow concluding that the torso behaviour has an important influence on the neck loading and therefore that the quality of a car seat depends on the human body substitute used. For instance, with the proposed torso model, a low-neck injury criterion (NIC) rearward value was obtained with low rigidity of the backrest foam and a stiff backrest net.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Coupled head-neck-torso and seat model for car seat optimization under rear-end impact


    Weitere Titelangaben:

    Gekoppeltes Kopf-Hals-Torso- und Sitzmodell für die Optimierung der Fahrzeugsitze bei einem Heckaufprall


    Beteiligte:

    Erschienen in:

    Journal of Sound and Vibration ; 313 , 3-5 ; 891-907


    Erscheinungsdatum :

    2008


    Format / Umfang :

    17 Seiten, 11 Bilder, 8 Tabellen, 35 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch






    Effect of Seat Back Restriction on Head, Neck and Torso Responses of Front Seat Occupants When Subjected to a Moderate Speed Rear-Impact

    Ramachandra, Rakshit / Pradhan, Vikram / Kang, Yun Seok et al. | British Library Conference Proceedings | 2021


    Effect of Vehicle Seat on Neck Injury in Rear Impact

    Teng, Tso Liang ;Liang, Cho Chung ;Huang, Hung Yu | Trans Tech Publications | 2012


    Head and Neck Loading Conditions over a Decade of IIHS Rear Impact Seat Testing

    Scanlon, John M. / Isaacs, Jessica / Garman, Christina | British Library Conference Proceedings | 2019