Turbochargers remain a crucial component in combustion engines. The increasing demand for higher speeds, larger mean pressures, and higher pressure amplitudes acting on the impeller leads to higher mechanical loads on the components. Dynamic excitations in particular can lead to resonances in the housing or in the blade components, which must be avoided or reduced by damping. To predict such behavior, detailed simulation models are required that account for the elastic deformation of the blades and/or the housing of the turbocharger. Various methods for simulating the dynamic behavior of rotor systems have been established over time. To calculate vibrations of rotor and blades at specific speeds, finite element models are used, particularly for harmonic or modal analysis. In these approaches the bearings are typically modeled as linear stiffness and damping elements. On the other side, to calculate bearing forces and minimal gap in the journal bearings or rotordynamic simulation with a simplified structural model but high detailed bearing model is used. The equation of motion is typically nonlinear and can be solved in time domain with ODE solution methods. Due to the relatively low number of degrees of freedom, this model does not contain effects through blade vibrations. This paper describes a method for coupling the structural model in ANSYS with a rotor dynamic calculation in a MBS program (Fig. 1). The aim is to investigate the influence of boundary conditions such as speed and oil inlet temperature on the blade oscillations. This represents an innovation, as structural mechanics and bearing systems were previously calculated separately.