Title
An approach using active structural acoustic control: for the reduction of structureborne road noise,Used
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A complete analysis of the structureborne noise transmission paths of an automotive suspension assembly is presented. First, a fullyinstrumented test bench consisting of a wheel/suspension/lower suspension Aarm assembly was de signed in order to identify the vibroacoustic transmission paths (up to 250 Hz) for white noise excitation of the wheel. Second, an analysis of the vibroacoustics of the suspension is presented; an overview of the Frequency Response Functions (FRF) is introduced and their respective modal behaviors are described. Frequency response function measurements between the excitation signal and each suspen sion/chassis linkages are used to characterize the dierent transmission paths that transmit energy through the chassis of the car. Finally, a synthesis of the major modal contributions of the suspension is drawn, with the objective of indicating which suspension transfer paths contribute the most to the structural forces trans mitted to the chassis. Modal transmissibility factors (MTF) were calculated to pro vide an overall classication of the modes to the vibration transmission through the individual suspension linkages and the orthogonal directions.
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