Modelling the vibro-acoustic properties of mechanical built-up structures is a challenging task, especially in the mid to high frequency regime, even with the computational resources available today. Standard modelling tools for complex vehicle parts include finite and boundary element methods (FEM and BEM), as well as Multi-Body Simulations (MBS). These methods are, however, robust only in the low frequency regime. In particular, FEM is not scalable to higher frequencies due to the prohibitive increase in model size. We have recently developed a new method called Discrete Flow Mapping (DFM), which extends existing high frequency methods, such as Statistical Energy Analysis or the so-called Dynamical Energy Analysis (DEA), to work on meshed structures. It provides for the first time detailed spatial information about the vibrational energy of a whole built-up structure of arbitrary complexity in this frequency range. The response of small-scale features and coupling coefficients between sub-components are obtained through local FEM models integrated in the global DFM treatment. The computational cost of DFM is largely frequency independent making it possible to get results from the mid-to-high frequency regime. This tool will be important when considering the vibrational response of a structure as a whole moving away from modelling vibrations only in sub-parts of the mechanical body.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Discrete Flow Mapping - A Mesh Based Simulation Tool for Mid-to-High Frequency Vibro-Acoustic Excitation of Complex Automotive Structures


    Weitere Titelangaben:

    Sae International Journal of Passenger Cars. Mechanical Systems
    Sae Int. J. Passeng. Cars - Mech. Syst


    Beteiligte:

    Kongress:

    8th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference ; 2014



    Erscheinungsdatum :

    2014-06-30


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Active vibro-acoustic of automotive vehicles

    Alves, G.S. / Shoureshi, R. / Knurek, T. et al. | Tema Archiv | 1994


    Vibro-Acoustic Simulation of Automotive Piping and Exhaust Systems

    Gaul, Lothar / Herrmann, Jan / Junge, Michael | TIBKAT | 2017


    Active Vibro-Acoustic Control in Automotive Vehicles

    Eberhard, Günter / Karkosch, Hans-Jürgen / Vance, James L. et al. | SAE Technical Papers | 1997


    Active Vibro-Acoustic Control in Automotive Vehicles

    Shoureshi, R. A. / Vance, J. L. / Ogundipe, L. et al. | British Library Conference Proceedings | 1997