关键词: 车辆工程, 变形模式, 吸能特性, 压皱刚度

Abstract: To enhancing the energy-absorbing capacity of the impact energyabsorbing component of the vehicle and to improve the vehicle frontal crashworthiness, the deformation modes and axial crush stiffness of the energyabsorbing component with common round and rectangular crosssections were studied. Using the method of topological optimization, by means of adjusting the axial crush stiffness of the component, a topological optimization model was built to perform the optimization analysis. Based on the obtained results, a new type of the impact energyabsorbing component with concave grooves axially on a pair of the side walls was proposed. The results of the finite element analysis show that the proposed new type of energy-absorbing component is characterized by a good deformation mode, can provide the stable axial supporting force during the deformation and energy-absorbing process without penalty on the mass and space requirements. Compared with the components with round and rectangular crosssections, the impact energyabsorbing capacity of the new component is enhanced significantly.

Key words: vehicle engineering, deformation mode, energy-absorbing capacity, crush stiffness