July Next consortium meeting on August 18, 2015 at Ohio State Univ., Columbus, Ohio.

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1 July.2015 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 Nonlinear and Time-varying Dynamic Interactions of Gear-Shaft-Bearing Systems Next consortium meeting on August 18, 2015 at Ohio State Univ., Columbus, Ohio. Spring consortium meeting in March, /7

2 Y. Wang, J. Yang, X. Li, G. Sun and T.C. Lim, "Interaction of Gear-Shaft Dynamics Considering Gyroscopic Effect of Compliant Driveline System," SAE Int. J. Passeng. Cars - Mech. Syst., 8(2): , S.C. Gopalakrishnan and T.C. Lim, "Elastohydrodynamic Lubrication Damping of Spiral Bevel Gears at Moderate Loads," SAE Int. J. Passeng. Cars - Mech. Syst., 8(2): , D. Guo, Y. Wang, T.C. Lim and P. Yi, "Tuning Axle Whine Characteristics with Emphasis on Gear Dynamics and Psychoacoustics," Proceedings of the SAE Noise and Vibration Conference and Exposition, Grand Rapids, Michigan, Paper , J. Yang, T.C. Lim, Influence of propeller shaft bending vibration on drivetrain gear dynamics, International Journal of Automotive Technology, 16(1), 57-65, 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, 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), , 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) possesses 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 2/7

3 Display of higher order dynamic models (shaft and housing modeling available): 3/7

4 Post-processor for higher order dynamic models (natural frequencies for the assembled model): Pre-processor for dynamic friction force: 4/7

5 Post-processor for dynamic friction force: 5/7

6 Enhanced result comparison function (dynamic bearing force comparison): 6/7

7 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: /7

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