Effect of Coulomb friction on nonlinear vibration isolation system

Xiuting Sun, Xingjian Jing, Li Cheng, Jian Xu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The effect of Coulomb friction and nonlinearity in a vibration isolation platform is studied in this paper, focusing on the analysis and design of nonlinear stiffness, friction force and damping characteristics to achieve an advantageous vibration isolation performance. The nonlinear isolation platform consists with connecting rods, springs, dampers and joints, which induce Coulomb friction forces in the joint parts. Considering the influence incurred by different structural parameters on system equivalent friction forces, the vibration isolation of the platform is studied. The proposed structure provides a remarkably powerful, practical and passive solution to realize the beneficial nonlinear stiffness and damping characteristics in vibration control. Since stiffness and damping properties are both asymmetrical nonlinear functions, and Coulomb friction is piecewise nonlinear function, Perturbation Method (PM) and Average Method (AM) are applied together to seek better solutions. The solutions by combination of PM and AM can accurately describe the responses and effect of Coulomb friction. The results not only show that much better vibration isolation performance and loading capacity can be easily achieved with nonlinear isolation platform by designing structural parameters, but also provide an accurate novel method to solve dynamic equation with nonlinear and piecewise functions.
Original languageEnglish
Title of host publication21st International Congress on Sound and Vibration 2014, ICSV 2014
PublisherInternational Institute of Acoustics and Vibrations
Pages1136-1143
Number of pages8
Volume2
ISBN (Electronic)9781634392389
Publication statusPublished - 1 Jan 2014
Event21st International Congress on Sound and Vibration 2014, ICSV 2014 - Beijing, China
Duration: 13 Jul 201417 Jul 2014

Conference

Conference21st International Congress on Sound and Vibration 2014, ICSV 2014
CountryChina
CityBeijing
Period13/07/1417/07/14

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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