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Appl. Sci. 2017, 7(7), 711; doi:10.3390/app7070711

Experimental Study of Vibration Isolation Characteristics of a Geometric Anti-Spring Isolator

1
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, No. 443, Huangshan Road, Shushan District, Hefei 230026, China
2
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, No. 443, Huangshan Road, Shushan District, Hefei 230026, China
*
Author to whom correspondence should be addressed.
Received: 12 June 2017 / Revised: 28 June 2017 / Accepted: 6 July 2017 / Published: 10 July 2017
(This article belongs to the Section Mechanical Engineering)
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Abstract

In order to realize low-frequency vibration isolation, a novel geometric anti-spring isolator consisting of several cantilever blade springs are developed in this paper. The optimal design parameters of the geometric anti-spring isolator for different nonlinear geometric parameters are theoretically obtained. The transmissibility characteristic of the geometric anti-spring isolator is investigated through mathematical simulation. A geometric anti-spring isolator with a nonlinear geometric parameter of 0.92 is designed and its vibration isolation performance and nonlinearity characteristic is experimentally studied. The experiment results show that the designed isolator has good low-frequency vibration isolation performance, of which the initial isolation frequency is less than 3.6 Hz when the load weight is 21 kg. The jump phenomena of the response of the isolator under linear frequency sweep excitation are observed, and this result demonstrates that the geometric anti-spring isolator has a complex nonlinearity characteristics with the increment of excitation amplitude. This research work provides a theoretical and experimental basis for the application of the nonlinear geometric anti-spring low-frequency passive vibration isolation technology in engineering practice. View Full-Text
Keywords: low-frequency vibration isolation; geometric anti-spring; nonlinearity; initial isolation frequency low-frequency vibration isolation; geometric anti-spring; nonlinearity; initial isolation frequency
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Yan, L.; Gong, X. Experimental Study of Vibration Isolation Characteristics of a Geometric Anti-Spring Isolator. Appl. Sci. 2017, 7, 711.

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