Predicting the Endless Stop-Band Behaviour of the NS-MRE Isolator
Publication Name
Lecture Notes in Electrical Engineering
Abstract
The periodic structure of the MRE isolator could generate special frequency range in which the waves cannot be propagated. This paper proposed a Negative Stiffness Magnetorheological Elastomer (NS-MRE) isolator with acoustic metamaterial characteristics. This particular structure generates an endless stop-band to restrict the transmission of the vibration. Furthermore, the permanent magnet arrays in the periodic structures of the NS-MRE isolator add dynamic negative stiffness to reduce the overall stiffness in the horizontal vibration direction without sacrificing vertical load-bearing stiffness. That can solve contradictory requirements for large load-bearing capacity and excellent vibration isolation performance at low frequencies as the former requires for large stiffness and the later requires for small stiffness. Using the mass-spring model, the generation mechanism of the stop-band was theoretically analysed. This paper deeply analyses the difference between the NS-MRS isolator and MRE isolator, in particular the stop-band of the single-mass periodic structure from the perspectives of finite period and infinite period, and its potential application for attenuating vibration amplitudes.
Open Access Status
This publication is not available as open access
Volume
1152
First Page
377
Last Page
389
Funding Number
2022CXGC010503
Funding Sponsor
National Natural Science Foundation of China