Abstract: Mainly concentrated on computer simulation and evaluated the crashworthiness performance according to full size prototype test, the structure optimization technique in mini car crashworthiness design is discussed. By computer simula- tion and investigating the relationship between the front floor deceleration and the structure of the front end of members, some measurements are actualized on energy absorption struct- ures, and the peak value of the deceleration is decreased to satisfying value. The test shows that the crashworthiness impro- ves dramatically in energy absorption length, quantity, stability, time and proportion, and the damage level of the dummy decreases considerably.

Key words: Computer simulation, Explicit finite element method, Frontal impact, Optimization design