高速、航空航天齿轮中的独特振动现象
日期：2021/09/24 - 2021/09/24
学术讲座：高速、航空航天齿轮中的独特振动现象
主讲人：Robert Parker, Professor, Department of Mechanical Engineering, University of Utah
时间：2021年9月24日（周五）上午10:00-11:30
地点：交大密西根学院龙宾楼三楼中集报告厅
Zoom: https://utah.zoom.us/my/rgparker Code: 23456
讲座摘要
Gears have recently been aggressively adopted in large aircraft engines because they improve turbine and fan blade efficiency. The high operating speeds and extreme focus on weight reduction lead to gear vibration much different from conventional gears. High speeds give high excitation frequencies, and lightweight, thin gears have lower natural frequencies. This combination triggers resonance, gyroscopic effects, nonlinearity, vibration of the gears as elastically compliant bodies, and parametric instability. These behaviors are driving development of new models and analysis tools.
This presentation will start with industrial examples motivating the work. Next, we describe modeling and analysis of gear vibration using analytical and computational methods. We emphasize planetary gears because they are the primary configuration in aerospace applications and because of their interesting dynamics from cyclic symmetry. These models, and their experimental validations, will be used to illustrate, without emphasis on mathematical details, the unique vibration behaviors that occur and how the analytical/computational findings have powerful practical implications.
主讲人简介
Prof. Parker is Professor of Mechanical Engineering at the University of Utah. Previously he was the L. S. Randolph Professor at Virginia Tech, where he also served as Department Head. He spent 4.5 years in Shanghai as University Distinguished Professor and Executive Dean of the University of Michigan-Shanghai Jiao Tong University Joint Institute and 13 years on the faculty at Ohio State. He received M.S. and Ph.D. degrees from the University of California, Berkeley.
Prof. Parker’s research examines the vibration and stability of high-speed mechanical systems. One major focus has been the vibration of gear and power transmission systems, where he has worked closely with the aircraft engine, helicopter, automotive, and wind turbine industries. His publications have been cited over 10,000 times with an h-index of 51.
Prof. Parker is a Fellow of the American Society of Mechanical Engineers (ASME), the American Association for the Advancement of Science, and the International Institute for Acoustics and Vibration. He was honored with ASME’s Myklestad Award for “major innovation in vibration research and engineering.” He received the US Presidential Early Career Award for Scientists and Engineers (“…the highest honor awarded by the US government to scientists and engineers early in their independent research careers”).
He serves on the Editorial Board of the Journal of Sound and Vibration and has been Associate Editor for Mechanism and Machine Theory and the ASME Journal of Vibration and Acoustics.
Prof. Parker has been a Visiting Fellow at Polytechnic University of Turin, Risø National Lab (Denmark), the University of New South Wales (Australia), the University of Sydney, Tokyo University, NASA Glenn Research Center, and INSA Lyon.