How do you use CAE to predict occupant injuries and optimize restraint systems?

Occupant injury prediction uses FE dummy models (HIII, THOR, WorldSID) in full crash simulation with vehicle interior model. Analysis evaluates: Head injury (HIC from acceleration), neck injury (Nij from forces/moments), chest injury (deflection, VC), and lower extremity (femur/tibia loads, intrusion contact). Optimization involves seat position, belt geometry and load limiting, airbag timing/venting/shape, and interior surface design. Modern approaches use human body models (THUMS, GHBMC) for detailed injury analysis. Design of experiments explores parameter space; optimization targets minimizing injury metrics while meeting timing and cost constraints. Virtual testing enables many more configurations than physical testing.