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Mathematical Problems in Engineering
Volume 2017, Article ID 8743868, 8 pages
Research Article

Research on Displacement Transfer Characteristics of a New Vibration-Isolating Platform Based on Parallel Mechanism

College of Mechanical & Automotive Engineering, Anhui Polytechnic University, No. 54, Beijing Middle Road, Wuhu City, China

Correspondence should be addressed to Shi Peicheng; moc.621@gnehciepihs

Received 15 February 2017; Accepted 18 April 2017; Published 8 June 2017

Academic Editor: Roman Lewandowski

Copyright © 2017 Shi Peicheng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Based on the parallel mechanism theory, a new vibration-isolating platform is designed and its kinetic equation is deduced. Taylor expansion is used to approximately replace the elastic restoring force expression of vibration-isolating platform, and the error analysis is carried out. The dynamic-displacement equation of the vibration-isolating platform is studied by using the Duffing equation with only the nonlinear term. The dynamic characteristics of the vibration-isolating platform are studied, including amplitude-frequency response, jumping-up and jumping-down frequency, and displacement transfer rate under base excitation. The results show that the lower the excitation amplitude, the lower the initial vibration isolation frequency of the system. The influence of the platform damping ratio on displacement transfer rate is directly related to the jumping-down frequency and the external excitation frequency. The vibration-isolating platform is ideally suited for high-frequency and small-amplitude vibrations.