Anti-shock characteristics is one of the main technical indices of a turbocharger for a marine diesel engine. In order to study the anti-shock capability of the turbocharger, a nonlinear finite element model of the turbocharger considering the oil film is established in this paper. The shock loads of the turbocharger in the form of the shock spectrum are calculated and analysed as the anti-shock conditions. Furthermore, the shock spectrum is converted into the time-domain acceleration loads and applied as the external load to the nonlinear finite element model. Finally non-dimensional indices of the structural stress and the deformation of the turbocharger is obtained by simulating based on the time-domain shock loads, and then the anti-shock characteristics of the turbocharger are evaluated.
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