Abstract: To address the technical demands for lightweight and energy-saving emission reduction in commercial vehicles, this paper proposes an innovative design scheme for mudguard bracket based on non-metallic materials. Through material selection optimization and structural stiffness enhancement design, combined with a computer aided engineering (CAE) simulation analysis and experimental validation system, systematically investigates the feasibility of applying reinforced nylon composites in cantilever-type bracket structures. The research results demonstrate that nonmetallic brackets employing a metal insert composite structure achieve a weight reduction of up to 50% compared to traditional metal products. Validated through bench vibration tests and 12 000 km road tests, the stiffness and strength indicators meet product design requirements, with plastic deformation controlled within 19.03 mm. This research provides a new technical pathway for developing lightweight components in commercial vehicles.

Key words: commercial vehicle lightweighting; mudguard bracket; reinforced nylon; structural optimization; vibration fatigue

摘要： 针对商用车轻量化与节能减排的技术需求，文章提出基于非金属材料的挡泥板支架创 新设计方案。通过材料选型优化、结构刚度增强设计，结合计算机辅助工程（CAE）仿真分 析与实验验证体系，系统研究了增强尼龙复合材料在悬臂梁式支架结构中的应用可行性。研究 结果表明，采用金属嵌件复合结构的非金属支架较传统金属制品减重达 50%，经台架振动试 验与 12 000 km 道路试验验证，其刚强度指标满足产品设计要求，塑性变形量控制在 19.03 mm 以内。该研究为商用车轻量化零部件开发提供了新的技术路径。

关键词: 商用车轻量化；挡泥板支架；增强尼龙；结构优化；振动疲劳