Dec Next consortium meeting on March 17, 2015 at Ohio State Univ., Columbus, Ohio.

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1 Dec.2014 Research Scope and Objective Current Research & Development Activities Recent Publications ( ) Graduate Student Profiles Future HGSim Functionalities Contact Information Caterpillar Dana General Motors John Deere LiuGong Romax Chrysler Ford Hyundai Linamar Meritor To develop gear mesh representations that will enable dynamic models to be formulated for simulating the vibration response of the driveline systems. To perform studies of the modal and dynamic characteristics controlling mesh force generation, vibration transmissibility, and gear whine. To develop an integrated gear mesh and dynamic modeling and analysis software package. To apply the software package for design, analysis and trouble-shooting. To develop a design roadmap for durable, quiet driveline structures. Driveline coupling effect on hypoid/bevel gear dynamic response Impact damping modeling for nonlinear gear dynamics The effect of system parameters on vibration and acoustic responses of gearbox Gear dynamic modeling considering the effect of lubrication The effect of housing flexibility on gear mesh and housing responses Next consortium meeting on March 17, 2015 at Ohio State Univ., Columbus, Ohio. Fall consortium meeting in August, /6

2 Y. Wang, J. Yang, D. Guo, G. Sun and T.C. Lim, A System Approach for Vibro-acoustic Analysis of Right-angle Gearbox, Proceedings of the National Conference on Noise Control Engineering, Fort Lauderdale, Florida, USA, Sep 8-10, J. Yang, Y. Wang, D. Guo, T.C. Lim,, Comparative Analysis of the Hypoid Gear Rotor System Dynamics Applying Dissimilar Tooth Meshing Formulations, International Gear Conference, Lyon Villeurbanne, France, Z. Shi, T.C. Lim, Effect of Hertzian Impact Damping on Hypoid Gear Dynamic Response, International Gear Conference, Lyon Villeurbanne, France, J. Yang, T. Peng and T.C. Lim, An Enhanced Multi-term Harmonic Balance Solution for Nonlinear Period-beta Dynamic Motions in Right-angle Gear Pairs. Nonlinear Dynamics, 76(2), , Y. Wang, T.C. Lim, J. Yang, Torque Load Effects on Mesh and Dynamic Characteristics of Hypoid Geared System. In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Y. Wang, T.C. Lim, J. Yang, Multi-Point Mesh Modeling and Nonlinear Multi-Body Dynamics of Hypoid Geared System, SAE International Journal of Passenger Cars-Mechanical Systems, 6(2), , C. Zhu, C. Song, T.C. Lim, T. Peng, Pitch Cone Design and Influence of Misalignments On Tooth Contact Behaviors of Crossed Beveloid Gears, Mechanism and Machine Theory, 59, 48-64, X. Hua, T.C. Lim, T. Peng, W. Elwali, Dynamic Analysis of Spiral Bevel Geared Rotor Systems Applying Finite Elements and Enhanced Lumped Parameters, International Journal of Automotive Technology, 13(1), pp , C. Zhu, C. Song, T.C. Lim, S. Vijayakar, Geometry Design and Tooth Contact Analysis of Crossed Beveloid Gears for Marine Transmissions, Chinese Journal of Mechanical Engineering, 25(2), pp , Yawen Wang (5 th year PhD student) was a research assistant in the State Key Lab of Mechanical Transmission at Chongqing University prior to joining the Hypoid and Bevel Gear Mesh and Dynamics Consortium research team at the University of Cincinnati. His has conducted research related to gear vibrations and gear noise, structural dynamics and automotive NVH (noise, vibration & harshness). His current research focuses on vibro-acoustic analysis of right-angle gearbox. He is presently the lead developer for the HGSim software package. wang2y4@mail.uc.edu Zhenghong Shi (4 th year PhD student) Strong skills in CAE and NVH testing. Currently working on driveline coupling effect on hypoid/bevel gear dynamics and impact damping modeling based on non-linear multibody dynamics which considers both time domain and frequency domain analysis and order tracking. His research interests include: FEA, NVH, rotor dynamics. shizg@mail.uc.edu Srikumar Gopalakrishnan (4 th year PhD student) works on Tribodynamics of right- angle gears for his dissertation. His research interests includes gear noise, gear vibrations, modal analysis, and automotive NVH. He worked as Finite Element analyst on linear structural analysis, non-linear analysis, and thermal analysis using ANSYS before joining the Hypoid and Bevel gear mesh and dynamics group at the University of Cincinnati. He primarily works on developing lubrication models for the HGSim. His skills include ANSYS, MATLAB and ABAQUS. conjeesr@mail.uc.edu 2/6

3 Load dependent contact ratio plot can be generated in load dependent mesh results: Hertzian impact damping can be considered in 2-DOF nonlinear dimensionless model: 3/6

4 Timoshenko beam option for propeller shaft model: 4/6

5 Flexible housing utility is expanded to include reduced housing model: 5/6

6 Teik C. Lim PhD, PE, Fellow (ASME, SAE) Director, Hypoid and Bevel Gear Mesh and Dynamics Consortium Dean, College of Engineering and Applied Science Herman Schneider Professor of Mechanical Engineering University of Cincinnati College of Engineering and Applied Science 801 Engineering Research Center (ERC) 2901 Woodside Drive P. O. Box No Cincinnati, Ohio , USA uc.edu/vibroacoustics Phone: Fax: /6