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Methodology for mass minimisation of a seat structure with integrated safety belts constrained by biomechanical responses on the occupant in frontal crashes

2010; Taylor & Francis; Volume: 15; Issue: 4 Linguagem: Inglês

10.1080/13588260903385550

1754-2111

Anders Gavelin, Mats Lindquist, Hans‐Åke Häggblad, Mats Oldenburg,

Vehicle Dynamics and Control Systems

Abstract A methodology using finite element (FE) modelling and simulation with a property-based model (PBM) is presented. A generic 3-D FE model of a seat structure with a three-point seat-integrated safety belt configuration was established. A 50th percentile Hybrid III FE dummy model was used as occupant. Metamodelling techniques were used in optimisation calculations performed in two steps. Step 1: Six separate optimisations minimising biomechanical responses of the FE dummy model. Step 2: Four separate optimisations with different start values of the design variables, with the total mass of the seat structure as objective function and with the minimised biomechanical responses from Step 1 as constraint values. Six design variables were used in both Step 1 and Step 2. The four optimisations performed in Step 2 generated four different results of the total mass. Thus, different local minima were found instead of one single global minimum. The presented methodology with a PBM may be used in a concept design phase. Some issues concerning the FE model suggest further improvement. Keywords: finite element (FE) modelsFE analysismetamodellingsimulationoptimisationbiomechanics Acknowledgements The financial support from VINNOVA (the Swedish Governmental Agency for Innovation Systems), the Vehicle Research Program (Fordonsforskningsprogrammet, ffp) and SAAB Automobile AB is gratefully acknowledged. Notes 1. Engineering Research AB, ERAB, www.erab.se