Using Finite Element Models Beyond Their Upper Frequency Limits in Electric Vehicle Applications

A hybrid finite element formulation that extends the applicability of finite element models to higher frequencies will be discussed. It is based on reducing the size of the finite element model significantly by replacing major parts of the model with equivalent dynamic impedances during the finite element calculations. The Component Mode Synthesis (CMS) approach is combined with analytical solutions of dynamic and static modes for computing appropriate values for the dynamic impedances. The power dissipated by the dynamic impedance elements provides the link to an energy finite element model of the omitted parts for computing their response. Theoretical aspects, the functionality of the implementation, and comparisons between simulations and experiments for production automotive and rotorcraft systems will be presented.

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