복합소재 대차프레임용 제동장치 브라켓의 위상최적화

초록

In this study, the lightweight design of brake bracket for a composite bogie was performed. The two models of brake bracket 12t and 9t were included in the study respectively. In order to achieve the goal, we performed finite element analysis and topology optimization. Firstly, the vertical and horizontal plates of the brake bracket in cross sectional area of the largest were selected as design regions. Minimum volume fraction of design regions was chosen as the objective function. Z-axis displacement of the brake bracket than the 2.5% initially to increase the displacement constraint was the progress. In order to reduce the analysis time, 1D beam elements was used for combining site between composite bogie frame and bracket brake instead of the composite bogie frame. Same equivalent correlationship was obtained with the full model. As a result two types of brake bracket’s weight were reduced to 60kg and 31kg respectively in the models.