Acoustic equivalent point source models play an increasingly important role in automotive NVH processes. Such models may be used to represent the sound radiation from e.g. the tires, the engine, the air intake and the exhaust line of a car, in terms of a limited number of point sources placed on rigid source surfaces. The models may be employed e.g. in connection with measured transfer paths for source-path contribution analysis. A method for determining position-optimal acoustic equivalent point source models is presented. The point source positioning problem inherent in acoustic equivalent point source modeling is formulated as a combinatorial optimization problem, based on iterative selection of indicator transfer functions from a large pool of pre-determined candidate transfer functions. The candidate transfer functions are calculated numerically, using a reciprocal Boundary Element formulation. Solutions to the optimization problem are sought using a combination of Genetic Algorithm and Steepest Descent Local Search methods. Results are presented from applying the method to determine acoustic equivalent point source models of varying accuracy of a real tire running on a dynamometer.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Acoustic equivalent point source models of tires using combinatorial optimization


    Additional title:

    Akustisch äquivalente Punktquellenmodelle von Reifen mittels kombinatorischer Optimierung


    Contributors:


    Publication date :

    2006


    Size :

    15 Seiten, 6 Bilder, 17 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Hotspot Identification Methods for the Derivation of Acoustic Equivalent Source Models

    Morkholt, J. / Schuhmacher, A. / Hald, J. et al. | British Library Conference Proceedings | 2003


    Hotspot identification methods for the derivation of acoustic equivalent source models

    Morkholt,J. / Schuhmacher,A. / Hald,J. et al. | Automotive engineering | 2003



    Investigation of noise source identification accuracy by acoustic holography with model tires

    Sakamoto,I. / Tanaka,T. / Miyake,T. et al. | Automotive engineering | 1996


    Hotspot Identification Methods for the Derivation of Acoustic Equivalent Source Models

    Schuhmacher, Andreas / Mørkholt, Jacob / Hald, Jørgen et al. | SAE Technical Papers | 2004