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채홍윤(Hongyun Chae),정홍래(Hongrae Jeong),안희태(Heetae Ahn),손준형(Junhyeong Sohn),김성구(Seonggoo Kim),황한영(Hanyoung Hwang),김진성(Jinsung Kim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
The stiffness of subframe has a great effect on the NVH of vehicle. Usually, dampers are applied to subframe for NVH improvement. But it is inefficient because it excessively increases the weight of vehicle. It is necessary to improve stiffness while minimizing the weight gain of subframe. For this, we conducted the topology optimization and got the load path of subframe. We analyzed the load path and eliminated unnecessary parts to reduce weight. Structural important parts were reinforced to increase stiffness. It resulted in 0.3㎏ increase in the weight of subframe and 20.8㎐ increase in the natural frequency. In this study, We propose the method that improved the stiffness while minimize weight of subframe.