The Open Mechanical Engineering Journal

2015, 9 : 558-563
Published online 2015 September 10. DOI: 10.2174/1874155X01509010558
Publisher ID: TOMEJ-9-558

Crashworthiness Optimization of Thin-Walled Rail with Different Collision Boundary Conditions

Hequan Wu , Libo Cao and Hongfeng Mao
Changsha University of Science and Technology, Changsha, No. 960, 2nd Section, South Wanjiali Road, Hunan, 410114, P.R. China.

ABSTRACT

As the world automotive crash safety regulations are different, it’s very important to design the energy absorbing structures that satisfy different collision boundary conditions. A large number of vehicle energy absorption beams dimensions were measured and then a common thin-walled rail was chosen. Considering the complexity of automobile collision boundary, finite element analysis and experimental design, interval uncertain algorithms, Kriging approximate model, NSGA - II genetic algorithm were combined to optimize the structure of the thin-walled rail with different impact velocity and different impact angle. Then the Pareto optimal solution was obtained. Thin walled beam after optimization has good energy absorption characteristics under different collision boundary conditions. Research results provide a method for the designing of a car that meets various crash regulations at the same time.

Keywords:

Boundary conditions, crashworthiness, optimal design, thin-walled rail.