基于OptiStruct后排座椅结构拓扑与参数优化的应用研究

Application Research on Parameter Optimization and Structure Topology of Rear Seat Based on OptiStruct

骨架设计在座椅设计中担任极其重要的地位,传统的骨架布局依靠经验设计,不仅会降低设计效率,还得不到最优的骨架布局方案。应用弯矩等效原理对圆管截面和矩形截面进行转换,并使用OptiStruct对某款汽车座椅后排进行拓扑优化,根据拓扑结果提出3个优化方案,对其进行安全带固定点及行李箱冲击仿真。研究结果表明:基于弯矩等效转换的力学依据可靠有效,能将管架结构有效地转化为优化基础模型,采用拓扑优化方法可以得到最优的座椅构件布局结构。

The frame design is important in seat design.The traditional frame design relies on experience design,which not only reduces design efficiency, but also not gets the optimal frame structure.The method of bending moment equivalent was applied to transform the tube cross section and rectangular cross section,and OptiStruct was used to optimize the rear seat of a car. According to the topology results, three optimization programs were proposed to simulate on the safety belt fixation and suitcase impact. The results of the study show that the mechanical basis based on the equivalent conversion of bending moment is reliable and effective,and the pipe frame structure can be effectively transformed into the optimized basic model.The topology optimization method can make the seat get optimal frame structure.