A Filter Seal Model for Point Mobility Prediction of Air Induction Systems

Virtual design validation of an air induction system (AIS) requires a proper finite element (FE) assembly model for various simulation based design tasks. The effect of the urethane air filter seal within an AIS assembly, however, still poses a technical challenge to the modeling of structural dynamic behaviors of the AIS product. In this paper, a filter seal model and its modeling approach for AIS assemblies are introduced, by utilizing the feature finite elements and empiric test data. A bushing element is used to model the unique nonlinear stiffness and damping properties of the urethane seal, as a function of seal orientation, preloading, temperature and excitation frequency, which are quantified based on the test data and empiric formula. Point mobility is used to character dynamic behaviors of an AIS structure under given loadings, as a transfer function in frequency domain. Point mobility can also be conveniently measured by using an instrumented hammer and accelerometer, and thus used for the correlation of CAE and test results as well. CAE predictions of point mobility results of AIS assemblies, with various design configurations, are investigated to determine the validation of the proposed filter seal model, based on the correlation of the predicted results with their respective experiment ones.

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See papers presented at SAE 2006 World Congress & Exhibition, April 2006, Detroit, MI, USA, Session: Adhesives, Sealings, and Gaskets (Part 1 of 2)

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