Dynamic Behavior of Gear Systems in Rotorcraft Applications
This work develops nonlinear dynamic models to analyze the vibration of gear systems that are commonly used in rotorcraft applications. The gear mesh interface model developed is expandable to accommodate any configuration. Considering a gear pair, the modeling is verified with finite element analysis and experimental measurements from the literature. It is shown that tooth surface modifications and deflections (static or dynamic) cause separation at portions of contact lines (partial contact loss) of the gear teeth. The dynamic response of a helical gear pair is nonlinear because of partial contact loss. The model is extended to a multi-mesh helicopter transmission, where static windup of the housing, shafts, and bearings couple with the gear mesh deflections. Dynamic analysis of this multi-mesh transmission gives crucial vibration information that helps reduce cabin noise. The vibration modes of helical planetary gears are examined and classified. It is shown that all vibration modes of helical planetary gears fall under three well-defined categories: Rotational-axial; translational-tilting; and planet. This categorization generalize that of two-dimensional spur planetary gears, and it persists for axially asymmetric configurations common in practical applications such as uneven contact pressure at the gear teeth, overhung gears, and so on.
Tugan Eritenel Robert G. Parker
Department of Mechanical Engineering, The Ohio State University, 201 W. 19th Ave. Columbus, OH 43210 State Key Lab for Mechanical Systems and Vibration, University of Michigan - Shanghai Jiao Tong Univ
国际会议
南京
英文
1-19
2009-10-14（万方平台首次上网日期，不代表论文的发表时间）