As an alternative to the element based methods, recently a wave based technique (WBT) has been developed. Since it is based on the indirect Trefftz approach, exact solutions of the governing differential equation are used to approximate the dynamic field variables. This paper discusses the extensions of the WBT for the analysis of engine noise radiation problems in 3 dimensions under anechoic conditions. Furthermore, necessary extensions of shape functions, numerical integration and a methodology to create a WBT radiation models are described. The performance of the method compared to a commercial BEM solution is demonstrated with a real engine example.
Application of the Wave Based Technique to Predict the Engine Noise Radiation Under Anechoic Conditions
Sae International Journal of Passenger Cars. Mechanical Systems
Sae Int. J. Passeng. Cars – Mech. Syst
SAE 2009 Noise and Vibration Conference and Exhibition ; 2009
Sae International Journal of Passenger Cars - Mechanical Systems ; 2 , 1 ; 1477-1486
2009-05-19
10 pages
Aufsatz (Konferenz)
Englisch
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