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Vibration Propagation of Gear Dynamics in a Gear-Bearing-Housing System Using Mathematical Modeling and Finite Element AnalysisVibration and noise caused by gear dynamics at the meshing teeth propagate through power transmission components to the surrounding environment. This study is devoted to developing computational tools to investigate the vibro-acoustic propagation of gear dynamics through a gearbox using different bearings. Detailed finite element/contact mechanics and boundary element models of the gear/bearing/housing system are established to compute the system vibration and noise propagation. Both vibration and acoustic models are validated by experiments including the vibration modal testing and sound field measurements. The effectiveness of each bearing type to disrupt vibration propagation is speed-dependent. Housing plays an important role in noise radiation .It, however, has limited effects on gear dynamics. Bearings are critical components in drivetrains. Accurate modeling of rolling element bearings is essential to assess vibration and noise of drivetrain systems. This study also seeks to fully describe the vibro-acoustic propagation of gear dynamics through a power-transmission system using rolling element and fluid film wave bearings. Fluid film wave bearings, which have higher damping than rolling element bearings, could offer an energy dissipation mechanism that reduces the gearbox noise. The effectiveness of each bearing type to disrupt vibration propagation in explored using multi-body computational models. These models include gears, shafts, rolling element and fluid film wave bearings, and the housing. Radiated noise is mapped from the gearbox surface to surrounding environment. The effectiveness of rolling element and fluid film wave bearings in breaking the vibro-acoustic propagation path from the gear to the housing is investigated.
Document ID
20120013868
Document Type
Contractor Report (CR)
Authors
Parker, Robert G. (Ohio State Univ. Columbus, OH, United States)
Guo, Yi (Ohio State Univ. Columbus, OH, United States)
Eritenel, Tugan (Ohio State Univ. Columbus, OH, United States)
Ericson, Tristan M. (Ohio State Univ. Columbus, OH, United States)
Date Acquired
August 26, 2013
Publication Date
August 1, 2012
Subject Category
Mechanical Engineering
Report/Patent Number
NASA/CR-2012-217664
E-18341
Funding Number(s)
CONTRACT_GRANT: NNC08CB03C
WBS: WBS 877868.02.07.03.04.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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