위상 및 치수최적설계에 기반한 알루미늄 전동차 차체의 경량화 방안 연구

초록

Weight reducing of aluminum carbody of a railway vehicle using topology and size optimization method is proposed in this work. A base plate of underframe of carbody is considered for the optimization, which is composed of double skin structures. A 2-D FEM model composed for optimization process is suggested first including properly assumed boundary and load conditions. By topology and size optimization, the model whose weight is reduced by 10% compared to the concurrent unoptimized model is proposed. FEM analysis is also carried out to check the feasibility of the proposed and shows satisfactory result.