题目：Nonlinear Dynamics and Stability in Machining Processes

时间：2024年11月30日 10:00-11:30

地点：j9九游会官方网页版 F210会议室

邀请人：瞿叶高 教授（振动、冲击、噪声研究所）

Biography

Marian Wiercigroch教授，国际著名非线性动力学专家，英国爱丁堡皇家学会院士，英国阿伯丁大学第六世纪讲席教授，阿伯丁大学应用动力学研究中心创始主任，波兰科学院技术科学部委员。担任国际权威期刊International Journal of Mechanical Sciences主编，以及二十多本杂志编委及中国力学学报海外编委。长期从事非线性动力学理论与实验研究，累计发表500多篇学术论文。Marian Wiercigroch教授注重理论研究在工程中的应用，是公司iV Dynamics Ltd.的创始人兼首席技术官。

Abstract

Comprehensive understanding of chatter, bifurcations and stability is essential for improving productivity, quality, and efficiency of manufacturing operations. In this lecture, first I will define nonlinearity, chatter, bifurcations and stability in manufacturing processes with the focus on metal cutting. Then I will discuss on the frictional chatter, which was introduced and investigated with my group and collaborators. Finally, examples of advanced nonlinear dynamics techniques such as path following bifurcation analysis, basins of attraction, Poincare maps and Lyapunov exponents will be discussed, which have been used to examine stability and determine a practically important measure so-called cutting safety.