【摘要】 以标准护栏纵向为拉伸方向对标准护栏进行拓扑优化，得到最优传力路径，提取新型护栏的初始截面。再应用超高性能混凝土材料，使用通过实车实验验证的护栏-车耦合有限元模型进行碰撞分析。为了得到同时使车辆质心加速度与护栏最大动态位移尽可能小的最佳截面参数，考虑到不确定因素的影响，使用田口方法结合物理规划法进行多目标稳健性设计。最后将优化后的护栏与标准护栏的仿真分析结果对比，结果表明优化后的新型护栏防撞性能全面提升，工作具有工程实际意义。更多还原

【Abstract】 The standard guardrail was topologically optimized in the longitudinal stretch direction, the optimal force transmission path was obtained, and the initial section of the new type guardrail was extracted. Then, ultra-high performance concrete material was applied to the collision analysis using the guardrail-vehicle coupling finite element model verified by the actual vehicle experiment. In order to obtain the optimal section parameters that minimize the acceleration of vehicle centroid and the maximum dynamic displacement of guardrail, taguchi method combined with physical programming method was used for multi-objective robust design considering the influence of uncertain factors. Finally, the simulation results of the optimized guardrail and the standard guardrail are compared, and the results show that the crashworthiness of the optimized new guardrail can be comprehensively improved. The work has practical engineering significance.更多还原