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Gear Dynamics and Gear Noise

Friday, September 29, 2017, 2:00 PM
Nedderman Hall 105

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Teik LimAbstract:

Gears are precision machine elements that are very efficient in transmitting power and motion.  However, they can also generate excessive vibrations and noise.  In fact, the dynamics of gears are one of the major limiting factors in the advancement of power transmission systems employed in automotive, off-highway vehicles and rotorcrafts.  The underlying physics of gear dynamics are discussed and analyzed. The concept of gear transmission error as the primary source of excitation is presented, and the dynamic interactions due to the existence of out-of-phase gear pair torsion modes and supporting structures are studied.  Application of these models to gain an in-depth understanding of the gear mesh force generation and vibration transmissibility can reveal quiet and durable designs of gears and powertrain systems.  Examples of practical case studies will be shown.

Bio: 

Teik Lim earned his Bachelor of Science degree in Mechanical Engineering from Michigan Technological University, his Master of Science in Mechanical Engineering from the University of Missouri-Rolla, and his Ph.D. in Mechanical Engineering at the Ohio State University.

He worked as a Project Engineer and Senior Engineer at Structural Dynamics Research Corporation before joining The Ohio State University Center for Automotive Research as a research scientist. He taught at the University of Alabama beginning in 1998 as Associate Professor before joining the University of Cincinnati in 2002, where he advanced from Associate Professor, Professor and Department Head of Mechanical Engineering to Associate Dean for Graduate Studies and Research and, ultimately, Dean of the College of Engineering and Applied Science. He served as Chair of the Council of Deans in 2015-16.

Lim is a Fellow of ASME – the American Society of Mechanical Engineers, and of SAE – the Society of Automotive Engineers, from which he received numerous research and teaching awards such as the Arch T. Colwell Merit Award in 2003 and the Ralph R. Teetor Educational Award in 2002. He was also recognized with the Thomas French Alumni Achievement Award in 2010 and GearLab Distinguished Alumnus Award this year from his alma mater, The Ohio State University.

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