概念车身的T型接头模型拓扑优化设计

通过静态刚度对比,验证了概念车身模型的正确性及可行性。考虑到接头刚度对车身刚度的重要影响,将接头模型加入到概念模型中,建立了T型接头与梁结构的混合模型(TJB模型)。通过权衡扭转工况下各接头部位对开口刚度的实际贡献,选择了车顶部位的关键接头作为修改区域。应用变密度法进行了拓扑优化,并根据优化结果及车身结构特点布置了加强板,取得了良好的修改效果。在车身的概念设计阶段采用拓扑优化方法,不仅可以加快设计进程,而且能够得到性能更优、结构更合理的产品。

Topology optimization design of T-joints in concept autobody

The correctness and feasibility of the concept autobody model were validated by static stiffness comparison.Considering the important effect of the T-joints on the global stiffness of the autobody,a T-joints model was integrated into the concept autobody model,and a mixed model TJB including the T-joints and beam elements was built.Weighing the actual contributions of different T-joints to the open stiffness under torsional condition,the key T-joints of the body roof were selected as the region of modificat...