阶梯式半挂车车架疲劳寿命预测  

Fatigue Life Prediction of Semi-trailer Frame

作　　者：李楠[1] 孙桓五[1] 闫杰[1] 周兴[1] 窦玮[1] 

机构地区：[1]太原理工大学车辆工程系,山西太原030024

出　　处：《机械工程与自动化》2012年第5期9-11,共3页Mechanical Engineering & Automation

基　　金：太原市科技明星项目(11014922)

摘　　要：根据某阶梯式半挂车车架的结构特点,建立了其有限元模型,通过分析得到车架静态应力分布;基于半挂车多体动力学模型,以H级路面的路面载荷作为边界条件进行动力学分析得到车架载荷谱。以上述分析数据为依据,综合考虑影响半挂车车架疲劳特性的主要因素,采用多轴临界面法Brown-Miller疲劳损伤平均应力修正模型预测了半挂车车架的多轴疲劳寿命,得到其疲劳薄弱部分,为结构和工艺优化提供参考。Based on the structural characteristics of a semi-trailer frame, a finite element model for the semi-trailer frame is built inANSYS, on which a static analysis is carried out and the static stress is obtained. By building a dynamic model of the frame, the load spectra of the frame is gained in condition of H-grade road load. On the basis of this, the fatigue life of the frame is calculated using Brown-Miller criterion with multi-axial assessment. The result may provide a base for future optimization.

关 键 词：阶梯式半挂车车架 Brown-Miller模型 疲劳影响因素 

分 类 号：U469.53[机械工程—车辆工程]