报告题目：The Nexus between Vibration-based Energy Harvesting and Structural Vibration Control

报 告 人：香港理工大学 蔡亲霖 博士

报告时间： 2023年3月29日（周三），10: 00-11: 00

地 点：江安校区灾后重建与管理学院3楼会议室

主 持 人：我校土木工程系 王斌 教授

主办单位：8181801威尼斯土木工程系、我校灾后重建与管理学院、我校中国西部抗震防灾研究中心、四川省土木建筑学会工程韧性防灾专业委员会

报告内容：This seminar will present a dual-function device enabling simultaneous vibration control and energy harvesting, namely energy-harvesting electromagnetic damper (EHEMD). The EHEMD consists of an electromagnetic damper (EMD) connected to an energy harvesting circuit (EHC). Considering the electro-mechanical effect, the EHC influences the damping performance of the EHEMD. A feed-forward control EHC is specifically designed to work as a stable constant equivalent resistor with energy harvesting function, and its effectiveness was validated through circuit tests and cyclic tests when connecting an EMD. Then a prototype of the EHEMD was installed in a 135 m-long bridge stay cable and tested as an energy-harvesting passive control strategy, showing comparable control performance with a traditional viscous damper. Subsequently, to enhance the vibration mitigation performance, an energy-harvesting adaptive control strategy was proposed by using the EHEMD. Such an adaptive EHEMD was numerically tested in a high-speed train secondary suspension, performing output power of several hundreds of Watts and superior vibration control performance compared with passive control. After the energy-harvesting passive and adaptive control validations, the dual-function optimizations of the energy-harvesting dampers were theoretically analyzed. The general consistency of the two objectives can be realized under random excitation input. Brief discussions on the isolators and floating structural control by using dual-function devices are also presented.

报告人简介：Dr. Cai received the B.S. and M.Eng. degrees in civil engineering from Xiamen University in 2013 and 2016, respectively, and the Ph.D. degree in structural engineering from the Hong Kong Polytechnic University (HK PolyU) in 2021. Currently, Dr. Cai is a postdoctoral fellow in the Department of Civil and Environmental Engineering, HK PolyU. His research interests include but are not limited to, integration of vibration control and energy harvesting, wave energy converter, and bridge health monitoring, relating to multi-disciplinary knowledge (e.g., civil and electrical engineering). He has published 17 SCI journal articles and been authorized 2 China Invention Patents. Over 320 citations and an H-index of 10 have been obtained for the journal papers. In addition, he hosts one National Young Scientists Fund (2023-2025) and one Postdoctoral Matching Fund of the HK PolyU (2022-2023), and participates in one General Research Fund of the Research Grants Council of Hong Kong (2023-2025).