Fatigue Reliability of Blade Root of Turbocharger Turbine for Vehicle Application  

作　　者：任兆欣 苏铁熊 王正 庄丽 席盛 

机构地区：[1]College of Mechatronic Engineering,North University of China [2]Key Laboratory of Diesel Engine Turbocharging Technology,China North Engine Research Institute

出　　处：《Journal of Donghua University(English Edition)》2016年第2期277-279,共3页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China(No.51375465)

摘　　要：The blade root fatigue is one of important failure modes of turbocharger turbine for vehicle application,and the reliability and life of turbine with blade root fatigue failure mode are studied.Firstly,the stress characteristics of turbine are analyzed,and based on the operating profile of turbocharger corresponding to the endurance test of engine,the stress spectrum of turbine with blade root fatigue failure mode is studied with the simulation method.Then,with the number of endurance test profile cycle as the life parameter,the reliability model and failure rate model of turbine with blade root fatigue failure mode are derived respectively. Finally,the rules that the reliability and failure rate of turbine with the blade root fatigue failure mode changes as life parameters are studied,and the life probabilistic characteristics of turbine are also studied.The blade root fatigue is one of important failure modes of turbocharger turbine for vehicle application,and the reliability and life of turbine with blade root fatigue failure mode are studied.Firstly,the stress characteristics of turbine are analyzed,and based on the operating profile of turbocharger corresponding to the endurance test of engine,the stress spectrum of turbine with blade root fatigue failure mode is studied with the simulation method.Then,with the number of endurance test profile cycle as the life parameter,the reliability model and failure rate model of turbine with blade root fatigue failure mode are derived respectively. Finally,the rules that the reliability and failure rate of turbine with the blade root fatigue failure mode changes as life parameters are studied,and the life probabilistic characteristics of turbine are also studied.

关 键 词：turbocharger for vehicle application TURBINE blade root fatigue reliability LIFE 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程] TH114[机械工程—机械设计及理论]