• 学术活动

美国机械工程师学会会士(ASME Fellow)、国家千人计划特聘教授、马里兰大学机械工程系 朱...

发布时间:2017-05-18 信息来源:

时间:2017年5月19日下午3:30;

地点:机电工程学院6B201室

题目:Recent Advances in Dynamic System Research

摘要:Some interesting results on the vibration and stability of distributed structural systems, vibration-based damage detection, and infinitely variable transmission will be reviewed. The vibration and stability of translating media with time-varying lengths and/or velocities will be addressed. Two types of dynamic stability problems are considered: dynamic stability of translating media during extension and retraction, and parametric instabilities in distributed structural systems with periodically varying velocities. The incremental harmonic balance method is used for high-dimensional models of nonlinear distributed systems with general nonlinearities. A new spatial discretization and substructure method, which ensures that all the matching conditions of distributed components are satisfied, and hence uniform convergence of the solutions, will be discussed. The method overcomes the drawbacks of the classical assumed modes and component mode synthesis methods. A new nonlinear model of a slack cable with bending stiffness and arbitrarily moving ends is developed. Only one-tenth of elements are needed to achieve the same accuracy as that of the finite element method. The new methodologies are applied to elevator and other systems. The model-based damage detection will address two major challenges in model-based damage detection: accurate modeling of structures and the development of a robustness algorithm for identifying the locations and extent of damage. Non-model-based methods using scanning laser vibrometry will also be presented. Finally, design, analysis, and control of novel infinitely variable transmission will be discussed. Experimental results will be presented to validate the theoretical predictions.

朱教授简历:

朱伟东,1964年生,马里兰大学机械工程系,教授

哈尔滨工业大学航天学院国家千人计划特聘教授(2012-2017)、美国机械工程师学会会士(ASME Fellow, 2010-)

主要研究成果:(1)激光测量结构损伤技术与仪器系统;(2)对分布参数结构系统振动和控制的研究在国际同行中处领先地位;(3)开创了电梯系统动力学和控制的研究领域,并得到了国际学术界和工业界的一致认可;(4)在模态测试,有限元建模和修正,和基于振动的结构探伤等领域取得了许多突出的成绩;(5)自主研发了世界领先的全机械无限无级变速传动箱,可广泛应用于风力发电机以及汽车传动系统。

由于学术上的卓越贡献,2004年获得美国国家科学基金会CAREER奖,该奖授予美国最有希望成为21世纪国际学术界领军人物的杰出青年学者。主持(在研和完成)研究项目几十项,总经费约400多万美元,单独从美国国家科学基金会和公司等处获得的科研经费达268万美元。在国际刊物发表论文100余篇,其中90余篇被SCI索引,多篇论文被提名为最优论文奖或成为下载最多的论文。合作出版了3本专著,论文已被人引用1000余次。

Copyright &copy 2016 Wenzhou University All Rights Reserved.浙ICP备07006821号