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Fatigue Reliability of Blade Root of Turbocharger Turbine for Vehicle Application
Pages: 277-279
Year: Issue:  2
Journal: Journal of Donghua University(English Edition)

Keyword:  turbocharger for vehicle applicationturbineblade rootfatigue reliabilitylife;
Abstract: 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.
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