Structural Design Optimization of Side/Rear Impact Guards Using a Coupled Genetic Algorithm Finite Element Method

Abstract

Underride protective structure can reduce serious injures when passenger cars collide with the rear end or side of the heavy vehicle. This paper describes the use of Genetic Algorithm (GA) coupled with a dynamic, inelastic and large deformation finite element (FE) code LS-DYNA to search optimal design of the Side/Rear impact guards. In order to verify the accuracy of the FE model, the simulation results were compared with real experiments follow with the regulation ECE R73. The validated FE model then used to study the optimal design base on under running distance and total amount of energy absorbing capacity. The results from this study shown that this newly developed method not only can found multi-objective design parameters but also can reduce computational time significantly.

Performance of Rear Under-Ride Protection Device (RUPD) During Car to Heavy Truck Rear Impact

“…Numerical analysis was used for design optimization of RUPD which conducted by Liu et al [15] to investigate inelastic and large deformation of the RUPD material. The study used Genetic Algorithm of finite element (GA/FE) which was available in LS-DYNA program.…”