Research into Multi-objective Topology Optimization of Monocoque EV Body Frame Using the Compromise Programming Method

摘要

Research into a lightweight body structure of an EV with necessary strength and stiffness plays an important role in an EV development stage. Based on the configuration of the newly developed EV, an objective function of multi-objective topology optimization is defined by compromise programming method. Meanwhile, the AHP (Analytical Hierarchy Process) approach is applied to obtain the weights of the body stiffness in various load conditions. Then the topology optimization is carried out based on the SIMP (Solid Isotropic Material with Penalization) method. A monocoque EV body frame which met the static stiffness requirements is established through topology optimization process. It is proved that applying the compromise programming method and the AHP approach to the multi-objective topology optimization of continuum structure could be served as an effective guidance to the vehicle body structure concept design.