主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2026, Vol. 51 ›› Issue (8): 71-75.DOI: 10.16638/j.cnki.1671-7988.2026.008.013

• 设计研究 • 上一篇    

某重卡挡泥板支架失效故障分析及 结构尺寸优化

宋旭建，谈国荣，刘红梅，王中昊   

  1. 浙江远程新能源商用车集团有限公司
  • 发布日期:2026-04-23
  • 通讯作者: 宋旭建
  • 作者简介:宋旭建（1987－），男，工程师，研究方向为汽车结构耐久仿真技术

Failure Analysis and Structural Dimension Optimization of a Heavy Truck Fender Bracket

SONG Xujian, TAN Guorong, LIU Hongmei, WANG Zhonghao   

  1. Zhejiang Geely Farizon New Energy Comercial Vehicles Group Company Limited
  • Published:2026-04-23
  • Contact: SONG Xujian

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摘要： 商用卡车的底盘悬臂类结构振动疲劳问题突出，作为生产工具严重影响用户的满意度。 文章针对某重卡后挡泥板在耐久试验中出现的开裂问题，开展振动疲劳仿真分析，结合模态 和路谱能量分布，分析判断仿真结果与实车问题一致，有效复现故障失效模式，并且进一步 应用尺寸优化技术确定复杂变截面结构的改进方案。最终该方案通过实车试验，证明了分析 方法的有效性，为解决轻重卡底盘悬臂结构件类似问题提供参考。

关键词: 挡泥板；振动疲劳；尺寸优化；结构耐久

Abstract: The vibration fatigue problem of the chassis cantilever structure of trucks is prominent, which seriously affects user satisfaction as a production tool. The article focuses on the cracking problem of a heavy-duty truck's rear mudguard during durability testing, and conducts vibration fatigue simulation analysis. Combining modal and road spectrum energy distribution, the simulation results are analyzed and judged to be consistent with the actual vehicle problem, effectively reproducing the failure mode of the fault, and further application of size optimization techniques to determine improvement plans for complex variable cross-section structures. The proposed solution ultimately passed real-vehicle testing, demonstrating the effectiveness of the analytical method and providing a reference for addressing similar issues in chassis cantilever structural components of light and heavy trucks.

Key words: fender; vibration fatigue; dimension optimization; structural durability