Event Details:

Lecturer: Zhou Jiaxi

About the Lecturer:

Zhou Jiaxi, Professor, Doctoral Supervisor.

His researches focus on low-frequency vibration reduction/isolation and low-frequency elastic wave metamaterials/structures. He has presided over (completed) three projects supported by National Natural Science Foundation of China, one subdivision of a project supported by National Key R & D Program of China, four provincial/ministerial level projects, and three projects in collaboration with enterprises. He has published 70 papers in journals at home and abroad including world famous ones like Mechanical Systems and Signal Processing, Nonlinear Dynamics, Journal of Sound and Vibration, Applied Physics Letters and Journal of Vibration Engineering, which have been cited for more than 800 times. He was granted 10 Chinese patents, and won the first prize of Science and technology award of Shaanxi Province.

About the Lecture:

Vibration is the key factor undermining the endurance and reliability of special equipment such as ships, rockets and satellites, and the low-frequency vibration is recognized as a bottleneck throughout the world. To meet the demand for vibration control of special equipment, the lecturer systematically carried out researches on the method and application for the reduction and isolation of quasi-zero stiffness vibration.

He has developed quasi-zero stiffness vibration isolation theory, proposed new quasi-zero stiffness mechanisms such as CRSM, solved the problem of traditional negative-stiffness mechanism failure under micro vibration, broke the directional limit of quasi-zero stiffness, presented torsional and multi-directional method to isolate quasi-zero stiffness vibration, through which omni-directional low frequency vibration isolation is obtained and secured.

The new mechanism of local low-frequency resonance reduces quasi-zero stiffness vibration and weakens the correlation between the frequency of vibration reduction with the stiffness and quality of the oscillator. With the low-frequency vibration reduction/isolation design based on theoretical results, he has developed many new quasi-zero stiffness vibration isolation prototypes, which have been widely used by enterprises such as China State Shipbuilding Co, Ltd., State Grid Corporation of China and Orlando Health.