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为满足节能与环保的需要,汽车轻量化是一个重要解决方案。该文探讨应用镁合金代替钢作为座椅骨架的可行性,以便改善其强度,并保持其低密度和较高吸振能力。进行原型座椅的台车后碰撞实验和 LS-DYNA 的有限元仿真计算,应用Taguchi 方法进行三水平正交数值试验,进行了应力分布、加速度等参数的敏感性分析。通过仿真计算与灵敏度分析,得到了影响应力水平的主要设计变量;得到了一款最佳化的镁合金座椅骨架结构设计。结果表明:与常规钢座椅骨架相比较,使用该方法的质量节省可达40 %。
To meet the needs of energy saving and environmental protection, lightweight car is an important solution. This article explores the feasibility of using magnesium alloy instead of steel as a seat frame in order to improve its strength and maintain its low density and high vibration absorption capacity. The post-crash test of the prototype seat and the finite element simulation of LS-DYNA were carried out. The Taguchi method was used to conduct the three-level orthogonal numerical test, and the sensitivity analysis of the stress distribution and acceleration parameters were carried out. Through the simulation and sensitivity analysis, the main design variables that affect the stress level are obtained. An optimized magnesium alloy seat frame structure design is obtained. The results show that compared with the conventional steel seat frame, the quality of this method can be saved up to 40%.