중량 최소화를 위한 자동차 차체의 소재배치 최적화

Abstract

This research treats the optimization of the material arrangement. To improve fuel efficiency and driving performance and to reduce production costs, an effort to reduce the weight of a vehicle has been steadily tried in automotive industry. Since the weight of BIW takes up a large portion of the total weight of a vehicle, reducing the weight of BIW greatly contributes to reducing the total weight of a vehicle. In this research, we formulate a design problem to minimize the weight of the BIW while satisfying design requirements about bending and torsional stiffness and establish a Metamodel-based design optimization strategy to solve the design problem. As a result of the optimization, we obtain weight reduction by 46.9% while satisfying all design requirements.