重型汽车变速器箱体结构强度及疲劳分析  

Body Structure Strength and Fatigue Analysis on the Gear-Box of Heavy Vehicle

作　　者：邓国红[1] 李玉[1] 杨鄂川[2] 欧健[1] 张勇 

机构地区：[1]重庆理工大学车辆工程学院,重庆400054 [2]重庆理工大学机械工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2016年第2期12-16,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金青年基金资助项目(51405051);2014年重庆理工大学研究生创新基金资助项目(YCX2014201)

摘　　要：考虑传动系非稳定工况下的动载荷效应,在某重型汽车变速器箱体的强度校核时提出了2种极限工况,同时对箱体进行了疲劳性能优化设计。基于静力学分析得到的强度和刚度结果,应用Miner线性积累疲劳损伤理论进行了箱体疲劳寿命分析,根据分析结果对变速器箱体的应力集中区域进行了局部结构优化设计,优化后箱体的最大损伤值明显降低,能够为变速器箱体的设计提供一定的参考。Considering transmission system dynamic load effect under unsteady condition,two kinds of extreme conditions were put forward when the heavy auto transmission housing has intensity checkout. At the same time,the fatigue performance optimization design was carried out for the box body.The box fatigue life was analyzed by using Miner linear cumulative damage theory under the result of strength and stiffness based on statics analysis. Then the area of stress concentration was optimized according to the analysis results. The result shows the maximum damage is decreased obviously and some reference is provided for the design of the transmission box.

关 键 词：变速器箱体 强度及刚度分析 Miner线性积累疲劳损伤理论 疲劳寿命分析 

分 类 号：U461[机械工程—车辆工程]