This investigation focuses on a class of rear suspension systems that contain both direct and intersecting structural paths from the tire contact patches to the vehicle body. The structural paths intersect through a dynamically active rear subframe structure. New experiments and computational models are developed and analyzed in this article to investigate the variability of structure-borne noise and vibration due to tire/road interactions in the lower- to mid-frequency regimes. Controlled operational experiments are conducted with a mass-production minivan on a chassis dynamometer equipped with rough road shells. Unlike prior literature, the controlled experiments are analyzed for run-run variations in the structure-borne noise up to 300 Hz in a single vehicle to evaluate the nature of excitations at the spindle as the key source of variation in the absence of significant manufacturing, assembly and instrumentation errors. Further, a deterministic modal expansion approach is used to examine these variations. Accordingly, an illustrative eleven-degree-of-freedom lumped parameter half vehicle model is developed and analytically utilized to demonstrate that left-right spindle excitation phasing dictates the participation of the subsystem vibrational modes in the system forced response. The findings are confirmed through the analysis of a reduced finite element model of the vehicle system with a high-fidelity, modally dense suspension model, where the left-right rolling excitation phasing at the spindle alone is found to affect the component dynamic vibration amplitudes up to ±30 dB depending upon the component location and frequency range. These results are in qualitative agreement with the type of variations observed in the experiments.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Explanation for Variability in Lower Frequency Structure-Borne Noise and Vibration: Roles of Rear Subframe Dynamics and Right-Left Spindle Phasing


    Additional title:

    Sae Int. J. Veh. Dyn., Stab., and Nvh


    Contributors:


    Publication date :

    2018-05-17


    Size :

    14 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    REAR SUBFRAME STRUCTURE

    TANAKA MASAAKI / KOMIYA KATSUYUKI | European Patent Office | 2018

    Free access

    REAR SUBFRAME STRUCTURE

    TANAKA MASAAKI / KOMIYA KATSUYUKI | European Patent Office | 2020

    Free access

    REAR SUBFRAME STRUCTURE

    TANAKA MASAAKI / KOMIYA KATSUYUKI | European Patent Office | 2018

    Free access

    REAR SUBFRAME STRUCTURE

    TANAKA MASAAKI / KOMIYA KATSUYUKI | European Patent Office | 2017

    Free access

    REAR SUBFRAME STRUCTURE

    TANAKA MASAAKI / KOMIYA KATSUYUKI | European Patent Office | 2017

    Free access