题目：Accurate, Fast Dynamic Analysis of High-Speed Gear/Bearing Transmissions
时间：2025年5月28日 14:00-16:00
地点：981博天娱乐最新版本 F210会议室
邀请人：龙新华 研究员（振动、冲击、噪声研究所）
Biography
Prof. Parker is a Professor of Mechanical Engineering at the University of Utah. Previously, he was the L.S. Randolph Professor at Virginia Tech, an SJTU Distinguished Professor, Executive Dean at the Univ. of Michigan-Shanghai Jiao Tong Univ. Joint Institute, and a Professor at Ohio State University.
Prof. Parker's research examines vibration of high-speed mechanical systems. One focus has been gear transmission dynamics, with emphasis on developing advanced models. His research has been sponsored by numerous government agencies and companies in the aircraft engine, helicopter, automotive, wind turbine, and power generation industries.
Prof. Parker is co-Founder of RedPoint Vibration LLC. RedPoint has developed the most technically advanced finite element/multibody dynamics software for systems involving contact of high-precision elastic bodies (such as gears, bearings, and transmissions).
Prof. Parker is a Fellow of the American Society of Mechanical Engineers, the American Association for the Advancement of Science, and the International Institute for Acoustics and Vibration. He received the ASME Myklestad Award for “major innovation in vibration research and engineering.”
Abstract
In aerospace applications, electric vehicles, robots, and other systems, gears operate at much higher speeds than before and must be lightweight. Such gears experience greater vibration than conventional gears with more challenging behaviors: elastic deformation of the gears, resonance, Coriolis/centrifugal effects, nonlinearity, and parametric instability. Crack formation and surface damage must be avoided or reliably detected before failure (aerospace). Gears must be quiet (vehicles). New computational tools are needed. The seminar will present key ideas behind a finite element/multibody dynamics tool with high-precision contact modeling between elastic bodies. The formulation differs from existing software in: a) the accuracy of its contact model (for example, contact surfaces are modeled with tolerance less than 0.1 μm), b) its general multibody dynamics implementation, and c) computational efficiency that allows dynamic analysis of complete transmissions across a wide range of speeds. High-precision contact analysis is performed at each gear tooth and each bearing roller at every time step of the simulation. This avoids the large approximations of traditional models that use “mesh stiffness” to model gear contact. The software can analyze full transmissions with any type of gears and any type of bearings.
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地址：上海市东川路800号上海交通大学闵行校区981博天娱乐最新版本
邮编：200240
Email：sjtume@sjtu.edu.cn