报 告 人:天津工业大学姚明辉教授、香港城市大学杨征保助理教授
邀 请 人:周生喜 教授
时 间:2019年11月12日(星期二)上午10:00-12:00
地 点:友谊校区航空楼A817
报告一:姚明辉,天津工业大学教授、博导,北京市优秀博士学位论文获得者,科学中国人(2015)年度人物
报告题目:航空发动机叶片/叶盘结构的非线性动力学研究
报告人简介:
姚明辉,女,天津工业大学人工智能学院教授、博士生导师。2006年毕业于北京工业大学机械设计及理论专业,获得工学博士学位;2010年至2011年加拿大多伦多大学机械与工业工程系从事博士后研究。主要研究领域为非线性压电能源采集器的理论和实验研究、航空发动机高速旋转叶片的动力学研究、高端装备中复杂非线性动力学的研究。在该领域发表SCI论文70多篇。2008年,博士学位论文获得北京市优秀博士学位论文。2009年,博士学位论文获得全国百篇优秀博士学位论文提名奖。2016年获得“科学中国人(2015)年度人物:杰出青年科学家奖”。作为项目负责人主持国家自然科学基金面上项目5项,主持天津市自然科学基金重点项目1项,参加国家自然科学基金重点项目1项、重大项目1项。
报告简介:
在现代航空工业中,研究新型大推重比、高转速、高效航空发动机是航空领域中的重要课题。作为大型航空发动机的核心部分,航空发动机叶片是发动机的重要组成部分,其中压气机叶片/叶盘是航空发动机的关键零件之一,我们以航空发动机压气机叶片/叶盘作为研究对象,研究高速旋转叶片的非线性动力学,根据叶片的装配位置、工作状态以及几何结构,针对低压压气机叶片,分别建立旋转薄壁悬臂梁的力学模型和旋转薄壁板和壳的力学模型,分析变转速、气动力、截面参数对高速旋转叶片非线性振动的影响。根据发动机在跨音速流场中高速旋转的工况,建立压气机叶片气动载荷模型;研究叶盘实际工况的振动模态;研究在非线性、非定常流场作用下整体叶盘的非线性振动特性。
报告二:杨征保 香港城市大学助理教授、博导
报告题目:Vibration Energy Harvesting: Efficiency and Compressive Mode
报告人简介:
Dr. Zhengbao YANG is an Assistant Professor in the Department of Mechanical and Biomedical Engineering at the City University of Hong Kong. Prior to joining the MBE department at CityU, Dr. Yang was a research fellow jointly appointed by the University of Toronto and Magna Inc. He received his BEng in Mechatronics from the Harbin Institute of Technology in 2012, and PhD in Mechanical Engineering from the University of Toronto in 2016. Dr. Yang’s research interests are vibrations and mechatronics with a special focus on the development of smart structures and dynamical systems for energy harvesters, actuators and sensor systems.
报告简介:
Energy harvesting holds great potential to achieve long-lifespan and self-powered operations of wireless sensor networks, wearable devices and medical implants, and thus has attracted substantial interest from both academia and industry. In today’s talk, I will briefly introduce the research work on energy harvesting done in the Smart Transducers and Vibration Laboratory at the City University of Hong. We aim to develop energy harvesting systems that can show a high power output, multi-directional sensitivity and broad operational bandwidth. We also have studied different energy conversion methods, including piezoelectric effect, electromagnetic effect, triboelectric effect and the magnetostrictive effect. Our research indicates that piezoelectric energy harvesters, especially those working in the strong compressive mode, are very promising and may achieve the desired self-powered operations in the near future. The seminar will also present information about the PhD admission of the City University of Hong Kong.