Date of Award


Document Type


Degree Name

Master of Science (MS)


The purpose of this study includes (1) to identify the relationship between the impact loads or backlash and the sound field pressure of impact direct noise of meshing gears, (2) to show that impact whether or not the impact direct noise contributes to the noise of overall gear system, and (3) to demonstrate how impact direct noise can be predicted. The method used to predict was finite element analysis and numerical solution. This research presents the analytical model of impact direct noise prediction for meshing gear teeth based on the data that the tooth vibration and surface are known by finite element technique. The relationship between impact load or backlash and impact direct noise is presented. The accuracy of the technique is verified by using it to compare with acceleration noise technique. Although the impact direct noise of meshing gear is high frequencies of natural vibration, it still shows significant contribution to overall noise excitation of a gear system.


vi, 61 leaves : ill. ; 28 cm



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