Abstract: On the basis of research and development of anti-collision beam system,a conceptual design of anti-collision beam system for a commercial vehicle was carried out,and a FE model was created for low-speed frontal collision with 100% rigid barrier.And using orthogonal experimental design to systematic analyze the factors which influence the energy-absorption characteristics of anti-collision beam.The factors are the section of bumper beam,the section of energy absorbing box,the inner plate thickness of energy absorbing box and the outer plate thickness of energy absorbing box.Using the range method and the comprehensive balance method to selected the best combination of energy-absorption characteristics which with low maximum collision force and small compression displacement.Finally,explore the distance of induced groove which influences the energy-absorption characteristics.The results indicate that the final combination has better energy absorption capacity and meets the requirements of collision force.

Key words: absorbing box, low-speed frontal collision, orthogonal experimental design, compression displacement, maximum collision force, distance of induced groove