某轻卡前保险杠开裂问题原因分析及优化  

Analysis and Optimization of the Reason of Fracture on a Light Truck Front Bumper

作　　者：王中昊 刘红梅 许兆运 宋旭建 WANG Zhonghao;LIU Hongmei;XU Zhaoyun;SONG Xujian(Zhejiang Geely Yuancheng New Energy Commercial Vehicles Group Company Limited,Hangzhou 311228,China)

机构地区：[1]浙江吉利远程新能源商用车有限公司,浙江杭州311228

出　　处：《汽车实用技术》2024年第18期110-115,共6页Automobile Applied Technology

摘　　要：针对某轻卡前保险杠在耐久试验中出现的开裂问题,文章从结构模态、强度以及振动疲劳三方面进行原因分析。基于频域振动疲劳的基本原理及振动疲劳载荷定义方法,建立扭振疲劳仿真分析模型并识别失效原因,结果显示风险区域与实车一致。同时,针对风险位置完成结构优化并通过实车验证,说明分析方法的有效性,为解决轻卡底盘悬挂结构件类似问题提供参考。For the problem of front bumper fractured in durability test of a light truck,this paper analyzes the reason of fracture from structural mode,strength and vibration fatigue.Based on the basic principle of vibration fatigue in frequency domain and the definition method of vibration fatigue load,the torsional fatigue simulation analysis model is established and the failure causes are identified.The result shows that the risk area is consistent with the real vehicle.At the same time,the structural optimization is completed for the risk position and passed the durability test,and the analysis method is verified effectiveness,the research results can provide a reference for solving similar problems of the light truck chassis structures.

关 键 词：前保险杠 强度分析 载荷谱 振动疲劳 扭振工况 

分 类 号：U462.2[机械工程—车辆工程]