Simulation and Optimization of Car Safety Performance in Side Impact Based on Response Surface Method

A finite element model of a full-scale vehicle in side impact was developed. The validity of the model was evaluated through a comparison with crash test results. Considering crash safety of the car side structure, a sub-structure model of the car side assembly was derived based on the side impact finite element model. Simulation and optimization of the car side structure were carried out using response surface method (RSM). The results of the simulation demonstrate that the duration of sub-structure model optimization using response surface method can be reduced to one fifth, comparing with traditional method using full scale model. The injury related parameter thorax-trauma-index (TTI) was optimized to lower level and meet the requirement of occupant protection from side impact.