Speaker：Prof. Huaxia Deng，Hefei University of Technology

Title: Research of Energy Transfer Mechanisms: From Adaptive Vibration Absorbers To Energy Harvesting

Invited by Prof. Taolin Sun 

Time：Nov 29, 2019 (Friday 16：00 pm)

Venue: Lecture Room 324, AISMST (Building #2, KeJiYuan, North Campus)

Faculties and students are warmly welcome.

School of Molecular Science and Engineering

South China Advanced Institute for Soft Matter Science and Technology

November 27, 2019

Abstract: 

Magnetorheological elastomer (MRE) is a kind of composite functional soft material whose modulus can be controlled by applied magnetic field. Based on the controllable modulus property of MRE, a kind of adaptive tuned vibration absorption technology has been proposed. The first prototype of tuned vibration absorber based on MRE in the world is developed, which overcomes the problem of narrow vibration absorption frequency band of traditional vibration absorption technology. The vibration absorption technology of linear system is based on the principle of energy transfer near the resonance point, while the nonlinear system, especially the multi stable system, can expand the working bandwidth of vibration absorber. Based on the research of vibration absorption technology in recent years, the concept of energy collection of poly-stable nonlinear system is proposed. A new multi stable physical phenomenon, synergetic poly-stable motion, is found, which changes the cognition that only several steady states energy collection can be realized in the traditional way. A seesaw energy transfer method is proposed, which changes the recognition that energy transfer cannot be performed between modals, is a new way to realize crossing potential barrier under low vibration intensity. A non-cantilever beam energy collection device with ultra-low frequency and wide frequency band characteristics is developed. The device can achieve energy collection with an ultra-low frequency of 0.1Hz, which is expected to solve the problem of ultra-low frequency energy collection in the ocean.

Brief Biography：

Huaxia Deng received B.E degree and the M.S. degree from and University of Science and Technology of China in 2004 and 2007 respectively. He obtained the PhD degree from University of Liverpool in 2011.

He was research associate in University of Liverpool and has been the Hungshan Young Scholar Professor of school of instrument science and optoelectronics engineering, Hefei University of Technology from 2012. He has published more than 50 papers and his research interests are smart materials, vibration analysis and vibration control. He is the review editor of the journal “Frontiers in Materials”, editor of “Experimental Mechanics”, Editor member of ”Journal of Mechanical Engineering and Automation”.

Dr. Deng was elected as the member of Institute of Physics in 2011. He was awarded the Duncan Norman Research Scholarship, Jin Guofan Prize for Excellent Youth of China Instrument Society.