Improved designs for large turbocharger rotors require both a thorough understanding of the modal properties of the system. And a knowledge of how the rotor will respond to typical force excitation. This paper describes the approach taken to develop. A mathematical model using finite element analysis to represent a complete turbocharger rotor based upon verification by. Experimental data obtained using conventional modal analysis and electronic speckle pattern interferometry (ESPI) techniques.? The relative merits of each technique are discussed.
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