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Hypoid and Spiral Bevel Gear Dynamics with Emphasis on Gear-Shaft-Bearing Structural Analysis
Hua, Xia

2010, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.

Hypoid and spiral bevel gears, used in the rear axles of cars, trucks and off-highway equipment, are subjected to harmful dynamic response which can be substantially affected by the structural characteristics of the shafts and bearings. This thesis research, with a focus on gear-shaft-bearing structural analysis, is aimed to develop effective mathematical models and advanced analytical approaches to achieve more accurate prediction of gear dynamic response as well as to investigate the underlying physics affecting dynamic response generation and transmissibility. Two key parts in my thesis are discussed below.


Firstly, existing lumped parameter dynamic model has been shown to be an effective tool for dynamic analysis of spiral bevel geared rotor system. This model is appropriate for fast computation and convenient analysis, but due to the limited degrees of freedom used, it may not fully take into consideration the shaft-bearing structural dynamic characteristics. Thus, a dynamic finite element model is proposed to fully account for the shaft-bearing dynamic characteristics. In addition, the existing equivalent lumped parameter synthesis approach used in the lumped parameter model, which is key to representing the shaft-bearing structural dynamic characteristics, has not been completely validated yet. The proposed finite element model is used to guide the validation and improvement of the current lumped parameter synthesis method using effective mass and inertia formulations, especially for modal response that is coupled to the pinion or gear bending response.

Secondly, a new shaft-bearing model has been proposed for the effective supporting stiffness calculation applied in the lumped parameter dynamic analysis of the spiral bevel geared rotor system with 3-bearing straddle-mounted pinion configuration. Also, based on 14 degrees of freedom lumped parameter dynamic model and quasi-static three-dimensional finite element tooth contact analysis program, two typical shaft-bearing configuration used in automotive application, that are the 3-bearing straddle mounted pinion configuration and the 2-bearing overhung mounted pinion configuration, are compared for their different contribution to the spiral bevel gear mesh and dynamics. Parametric study is also performed to analyze the effect of shaft-bearing configuration on spiral bevel gear mesh and dynamics.

Teik Lim, PhD (Committee Chair)
Ronald Huston, PhD (Committee Member)
David Thompson, PhD (Committee Member)
85 p.

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Hua, X. (2010). Hypoid and Spiral Bevel Gear Dynamics with Emphasis on Gear-Shaft-Bearing Structural Analysis. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/

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Hua, Xia. "Hypoid and Spiral Bevel Gear Dynamics with Emphasis on Gear-Shaft-Bearing Structural Analysis." Electronic Thesis or Dissertation. University of Cincinnati, 2010. OhioLINK Electronic Theses and Dissertations Center. 11 Dec 2017.

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Hua, Xia "Hypoid and Spiral Bevel Gear Dynamics with Emphasis on Gear-Shaft-Bearing Structural Analysis." Electronic Thesis or Dissertation. University of Cincinnati, 2010. https://etd.ohiolink.edu/

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