基于道路模拟激励谱的AMT执行机构疲劳寿命分析  

Research of the fatigue life of AMT actuator based on road simulation excitation spectrum

作　　者：杨平[1] 石晓辉[2] YANG Ping;SHI Xiaohui(Chongqing Technology and Business Institute,College of Intelligent Manufacturing and Automobile,Chongqing 401520,China;Key Laboratory of Advanced Manufacturing Technology for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400541,China)

机构地区：[1]重庆工商职业学院智能制造与汽车学院,重庆401520 [2]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400541

出　　处：《中国工程机械学报》2019年第2期178-183,共6页Chinese Journal of Construction Machinery

基　　金：国家自然科学基金资助项目(51205432);重庆市教委科学技术研究资助项目(KJ1737460)

摘　　要：为预测AMT执行机构的疲劳寿命,在汽车试验场采集了AMT及其执行机构的实际道路载荷谱.结合搭建的AMT执行机构多通道道路模拟试验台,利用道路模拟迭代试验在室内准确高效地再现了AMT执行机构实际行驶载荷谱,并提取了道路模拟激励谱.利用有限元分析软件和AMAMS多体动力学仿真软件,建立了AMT执行机构的动力学仿真平台.将实测载荷谱与虚拟试验提取的载荷谱进行对比,并不断修正模型的各参数,得到了具有一定精度的仿真模型.根据材料的S-N曲线,利用MSC.Fatigue软件,以等效实际路面的激励信号为输入,得到执行机构的疲劳寿命分布并预估疲劳寿命,为执行机构的可靠性设计和结构优化提供了参考依据.For predicting the fatigue life of the AMT actuator,the AMT actuator actual driving road load spectrum are collected in test field,combined with the developed AMT actuator multi-axes road simulation test bench,the load spectrum simulation iteration method succeeded in achieving accurate and efficient reproducing of AMT actuator actual driving road load spectrum and thus road simulation excitation spectrum are extracted.By using the finite element analysis soft and multi-body dynamics simulation software ADAMS,the dynamics simulation test platform is built.The outcomes are verified by actual collected spectrum and road simulation test results.Based on the S-N curve of actuator material,taking the equivalent real road excitation as simulation input signal,the fatigue damage and life of the AMT actuator is got by using MSC.Fatigue software,providing reference base for the reliability design and structure optimization of the AMT actuator.

关 键 词：道路模拟 AMT执行机构 虚拟试验 疲劳寿命 

分 类 号：U467.3[机械工程—车辆工程]