基于故障树法的汽车制动踏板疲劳分析研究  

Fatigue Analysis Study of Automotive Brake Pedal Based on Fault Tree Method

作　　者：方玉杰 吴二娟 Fang Yujie;Wu Erjuan(Jiangsu Vocational College of Electronics and Information,Huai’an 223003)

机构地区：[1]江苏电子信息职业学院,淮安223003

出　　处：《汽车工艺与材料》2025年第3期55-60,共6页Automobile Technology & Material

基　　金：江苏省职业院校大学生创新实践项目“基于后装市场的自动泊车系统设计与开发”(G-2023-0332);淮安市科技局创新服务能力建设计划项目“淮安市新能源汽车技术公共服务平台”(HAP202313)。

摘　　要：为提高汽车制动踏板的使用寿命,研究了不同影响因素对汽车制动踏板构件疲劳失效的影响程度,采用故障树法(FTA),通过最小割集求解构件故障树的结构重要度,得出材料和载荷是影响制动踏板构件寿命的主要原因,应力集中为次要原因,以某重型载货汽车制动踏板有限元模型为例,利用有限元软件HyperMesh和疲劳软件nCode加以预测分析,并对踏板进行刚度测试试验,验证了模型的合理性。To improve the service life of automotive brake pedals,this paper investigates the impact of different factors affecting the fatigue failure of automotive pedal components,applies the Fault Tree Analysis(FTA) method to solve the structural importance of components through the minimal cutset.The frndings indicates that material and load are the primary causes affecting the life of brake pedal components,with stress concentration being a seeondary cause.Taking a heavy truck brake pedal Finite Element(FE) model as an example,the finite element software Hypermesh and fatigue software nCode are used for predication and analysis,and the stiffness test experiment of the pedal is carried out to verify the rationality of the model.

关 键 词：制动踏板 疲劳分析 故障树分析 有限元 

分 类 号：U463.55[机械工程—车辆工程]