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Nonlinear Time-varying Dynamic Model...

Shi, Zhenghong.

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Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response./
作者:	Shi, Zhenghong.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	177 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-11(E), Section: B.
Contained By:	Dissertation Abstracts International78-11B(E).
標題:	Mechanical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10626888
ISBN:	9781369980936

Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response.
Shi, Zhenghong.

Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 177 p.

Source: Dissertation Abstracts International, Volume: 78-11(E), Section: B.

Thesis (Ph.D.)--University of Cincinnati, 2017.

The dissertation is focused on analyzing nonlinear time-varying dynamic model of hypoid geared rotor system with emphasis on more detailed gear mesh modeling and nonlinear interactions among different driveline components. The main contents are listed as follows:

ISBN: 9781369980936Subjects--Topical Terms:

649730
Mechanical engineering.

Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response.
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245 1 0 $a Nonlinear Time-varying Dynamic Modeling of Vehicle Driveline Systems with Emphasis on Hypoid Gear Excitation and Response.
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300 $a 177 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-11(E), Section: B.
500 $a Adviser: Teik C. Lim.
502 $a Thesis (Ph.D.)--University of Cincinnati, 2017.
520 $a The dissertation is focused on analyzing nonlinear time-varying dynamic model of hypoid geared rotor system with emphasis on more detailed gear mesh modeling and nonlinear interactions among different driveline components. The main contents are listed as follows:
520 $a Firstly, an enhanced time-varying load dependent hypoid gear mesh generation model is proposed. The model accounts for instantaneous torque variation within each shaft rotation cycle by employing a three-dimensional (3D) interpolation scheme to construct the mesh parameter surfaces. The variation of mesh parameters within one pinion shaft rotation cycle due to time-varying external loading conditions is analyzed based on the model formulated. Results show that the proposed model yields more reasonable dynamic response predictions than the traditional stationary mesh model in light load cases. Comparative study of external excitation orders reveals that high order excitation tend to have more significant influence on dynamic responses especially under light torque load conditions.
520 $a Secondly, an enhanced hypoid gear mesh model that incorporates Hertzian impact damping function is presented. Two types of impact damping models, namely viscous and non-viscous type based on first principle of mechanics are compared to previous empirical damping models with constant damping coefficient. Parametric studies are performed for both steady state and transient analysis to investigate the impact damping effect under different load conditions or physical parameters of meshing gear pair. It is demonstrated that impact damping model can significantly reduce the amplitude of dynamic mesh force and non-viscous damping model has more significant effect on dynamic response under heavy torque load due to greater elastic deformation.
520 $a Thirdly, detailed modeling of a universal joint that connects driveline propeller shaft and pinion shaft is proposed to demonstrate the effect of shaft misalignment on hypoid gear dynamic response with pinion mass unbalance considered. Driving speed and torque fluctuation as well as external bending moment generated when driven through universal joint are analyzed with different misalignment angle. Bending moment components acting on the driven pinion shaft can exert additional load on pinion shaft bearings. Dynamic load on bearings are evaluated which is found to be more sensitive to shaft misalignment and mass unbalance excitations compared to gear dynamic response along effective line-of-action.
520 $a Finally, nonlinear interaction between time-varying hypoid gear mesh and bearing support is investigated. Linear model is firstly analyzed to study the modal frequency and mode shape variations under different stiffness ratio between gear mesh and bearing support. Then, nonlinear analysis is conducted and it is found that the coupling between hypoid gear mesh and bearing support can be either strong or weak depending on the ratio between mesh stiffness along line-of-action (LOA) and bearing stiffness in radial direction. Parametric studies indicate that dynamic mesh force is sensitive to bearing clearance for certain stiffness ratio. Dynamic force changes on actual bearing locations due to bearing clearance are evaluated and results show that bearing radial clearance has influence on structure-borne noise transmission for a complete hypoid gear transmission system due to its effect on gear dynamic response and actual bearing loads.
590 $a School code: 0045.
650 4 $a Mechanical engineering. $3 649730
650 4 $a Mechanics. $3 525881
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710 2 $a University of Cincinnati. $b Mechanical Engineering. $3 1681595
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