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 ›› 2025, Vol. 50 ›› Issue (14): 49-54，72.DOI: 10.16638/j.cnki.1671-7988.2025.014.010

• 设计研究 • 上一篇    

某轻卡保险杠的对标分析及可靠性性能优化

杨东升，毛洪海，聂文武，钱玉兰   

  1. 潍柴动力股份有限公司上海分公司
  • 发布日期:2025-07-28
  • 通讯作者: 杨东升
  • 作者简介:杨东升（1986－），男，硕士，工程师，研究方向为整车及零部件结构的仿真与优化

Benchmark Analysis and Reliability Performance Optimization of a Light Truck Bumper

YANG Dongsheng, MAO Honghai, NIE Wenwu, QIAN Yulan   

  1. Weichai Power Company Limited Shanghai Branch
  • Published:2025-07-28
  • Contact: YANG Dongsheng

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摘要： 研究针对某车型保险杠开展系统的对标分析与性能优化。首先，对保险杠结构与材料 特性进行深度剖析，对比相关文献与汽车行业标准的工况设置，明确需满足各方向 6.8g 的严 苛加速度要求。结构对标发现，现有保险杠第一阶模态频率较标杆车低 10.8 Hz，通过变密度 法拓扑优化实现频率提升。在可靠性试验中，保险杠经综合路况 3 000 km 测试后断裂，分析 为小循环载荷引发裂纹扩展所致。通过将侧向开口式结构改进为闭口式结构，有效增强抗变 形能力、缓解应力的集中，成功解决可靠性问题，显著提升保险杠性能。

关键词: 保险杠；对标分析；有限元分析；拓扑优化；疲劳分析

Abstract: This study conducts a systematic benchmarking analysis and performance optimization for the bumper of a certain vehicle model. First, it deeply analyzes the structural and material characteristics of the bumper, compares the working condition settings in relevant literatures and automotive industry standards, and clarifies the requirement to meet the strict acceleration of 6.8g in all directions. Structural benchmarking reveals that the first-order modal frequency of the existing bumper is 10.8 Hz lower than that of the benchmark vehicle, and the frequency is improved through topology optimization based on the variable density method. In the reliability test, the bumper breaks after a 3 000 km test on comprehensive road conditions, which is analyzed to be caused by crack propagation under small cyclic loads. By improving the lateral open structure into a closed structure, the anti-deformation ability is effectively enhanced, the local stress concentration is relieved, the reliability problem is successfully solved, and the bumper performance is significantly improved.

Key words: bumper; benchmarking analysis; finite element analysis; topology optimization; fatigue analysis