Research On Steering System And Instrument Panel Vibration Performance Based On NVH

This paper was based on a SUV on designing, utilizing HYPERMESH、PATRAN、NASTRAN and Virtual.Lab Acoustics accomplished simulation analysis of vibration andnoise of steering system and instrument panel.CAD model for steering system and instrument panel assembly has been meshed forfinite element analysis and multi-body dynamics analysis. Accomplished modal analysisSteering system and instrument panel assembly, achieved vibration performance of thestructure. Engine excitation was applied to the BIW, the frequency response of the steeringsystem and instrument panel was analyzed.Sensitivity analysis of the thickness of the parts for steering and instrument panel wasapplied to identify the parts which have greater sensitivity to the overall stiffness. Basedon the data of sensitivity, the thickness of the parts for the steering system was optimized.The natural frequencies of each mode have been improved after optimization, the peakvelocity of the vibration where the driver grip has been reduced.Vehicle compartment cavity boundary element model was accomplished based on thefinite element model of the body. The noise response field points at the binaural of thedriver and front passenger was established. Noise analysis of the vibration caused by thesteering system and instrument panel was performed. Interior noise conditions improveafter the structure wad optimized manifested as the maximum noise has lowered,low-noise band expanded.Summarized the work done in this article provides a basis for the improvement of thesteering system and instrument panel; simultaneously, the method in this article could befor reference in other structures CAE analysis.