Gear Dynamics And Gear Noise Short Course


Gear Dynamics And Gear Noise Short Course to be Held at The Ohio State University Department of Mechanical and Aerospace Engineering in Columbus, Ohio April 29 – May 2, 2013.

The purpose of this unique short course is to provide a better understanding of the mechanisms of gear noise generation, methods by which gear noise is measured and predicted, and techniques employed in gear noise and vibration reduction. Over the past 34 years more than 1750 engineers and technicians from over 355 companies have attended the Gear Noise Short Courses. Topics discussed will include:

• Gear Whine and Rattle
• Transmission Error – The Main Source
• Measurements for Gear Noise Diagnosis
• Noise, Vibration and Harshness Issues
• Shaft and Gear Tooth Dynamics
• Profile Design, Tolerancing and Manufacturing
• Transmission Paths and Housing Acoustics
• All Types of Gears including Hypoids
• Noise and Vibration Reduction Techniques
• Use of Practical Demonstrations
• Demo of OSU-GearLab Computer Software
• Advanced Research Topics

The course is of particular interest to engineers and technicians involved in the analysis, manufacture, design specification, or utilization of simple and complex gear systems. Industries that find this course helpful include the automotive, transportation, wind-energy, process machinery, aircraft, appliance, general manufacturing, and all gear manufacturers. The course material is covered in such a way that the fundamentals of gearing, gear dynamics, noise analysis, and measurements are covered. This makes the course appropriate to the gear designer with little knowledge of noise analysis as well as to the noise specialist with little prior knowledge of gears. A feature of this course is the interspersing of demonstrations with lectures. The extensive measurement and computer software capabilities of the Gear and Power Transmission Research Laboratory provide for this in a simple, non-commercial manner. On the first day, the lecturers discuss why even perfect gears make noise. They present in both qualitative and quantitative terms how gear design parameters and manufacturing errors affect noise. The concept of gear transmission error, one of the major contributors to gear noise, is developed, and methods of predicting transmission errors from design and manufacturing data are presented. Participants get a clear physical insight into the problems they face and how they may apply course knowledge to help solve their gear noise problems. On the second day, lecturers concentrate on gear system dynamics and acoustics, gear rattle, and advanced signal processing. The third day’s lectures briefly discuss the sources and simulation models of gear rattle and the activities of the Gear and Power Transmission Research Laboratory, as well as spending several hours in the case history workshop.

This novel approach to discussing “real life” gear noise and dynamics problems has been used in this course since its inception. The workshop, which has been lauded by past attendees for its practical flavor, takes place on the last day of the course. The purpose of this workshop is to allow the course instructors and participants to interact and to discuss gear noise case histories presented by course attendees who need not reveal any proprietary information. Course attendees are asked to present a brief synopsis of problems they have encountered or of a procedure they have used for gear noise analysis and reduction. Possible approaches to solve each problem are discussed.

Throughout each course, laboratory or computer software demonstrations are used to illustrate gear noise measurement and analysis techniques. The facilities of the Gear and Power Transmission Research Laboratory and the Acoustics and Dynamics Laboratory are used for these demonstrations.

The round table discussions on Day 4 are intended to foster interactive problem solving discussions on a variety of topics such as:

1. Application of basic concepts covered in the lectures to practical problems attendees may have.
2. Advanced computer modeling methods used for transmission errors, geared system dynamics, gear rattle, etc.
3. Experimental methods for casing dynamics, and acoustics, advanced signal processing, transmission error measurement, etc.
4. Discussion of pertinent literature and prior approaches utilized to address difficult problems. Parallel sessions will be organized to suit the needs of attendees.

Dr. Donald Houser is the course organizer and will lecture on gear noise measurement and gear modeling. He is Professor Emeritus of Mechanical Engineering and Founder of the Gear Dynamics and Gear Noise Research Laboratory at Ohio State. He has been active in gear dynamics research for over 45 years and has served as a consultant in this field for numerous companies. Dr. Houser is past chairman of ASME’s Power Transmission and Gearing Committee, past chairman of ASME’s Gear Noise Committee, a member of the AGMA Noise Committee, and author of gear noise chapters in The Gear Handbook (D. Townsend, editor) and Handbook of Noise and Vibration Control (M. Crocker, editor). Dr. Rajendra Singh is The Donald D. Glower Chair in Engineering and Director of the Acoustics and Dynamics Laboratory at Ohio State. He has published more than 375 articles and is well recognized for research in geared system acoustics, bearing-casing dynamics, gear rattle analysis, and nonlinear driveline dynamics. He is a fellow of ASME, ASA, SAE, and INCE/USA, and has received several national awards for both teaching and research. Dr. Singh has developed and teaches an innovative graduate course sequence in automotive noise and vibration control in partnership with General Motors. He has served as the president of the Institute of Noise Control Engineering in 2003.

Advance registration is required and should be completed no later than April 15, 2013. Applicants are accepted on a first-come, first-served basis to the limit of the course. However, the university reserves the right to limit admission to the best-qualified in order to give them maximum benefit. Tuition payment is expected with registration, but arrangements for payment must be completed in advance of the starting date. Full tuition refund is made if cancellation is received by April 15, 2013. Checks should be payable to: The Ohio State University. The agenda, nearby hotels, parking, airport transportation, and other relevant information will be sent upon registration or they can be viewed on the GearLab website ( Contact Jonny Harianto (614-688-3952, for registration information. Dr. D.R. Houser (614-292-5860, should be contacted for technical information.