Simulation and optimization of magnetic negative stiffness dampers

Xiang Shi, Songye Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

This paper presents the detailed modelling, parametric studies, and optimizations for two recently proposed magnetic negative stiffness dampers (MNSDs). Both dampers are composed of several coaxially arranged permanent magnets and a conductive pipe. The novel MNSDs can efficiently integrate negative stiffness and eddy-current damping in compact and simple configurations. However, the optimal design of MNSDs has never been investigated. Therefore, this paper establishes numerical models for MNSDs, and the accuracy of the model is validated through a comparison with the experimental results. The effects of magnet arrangement and dimensions on the negative stiffness and eddy-current damping characteristics are systematically investigated through parametric studies. The MNSDs are also individually optimized to maximize the negative stiffness and eddy-current damping coefficients. Based on the optimization results, some optimal design formulas are obtained to facilitate the quick design of MNSDs for different vibration suppression applications in the future.
Original languageEnglish
Pages (from-to)14-33
Number of pages20
JournalSensors and Actuators, A: Physical
Volume259
DOIs
Publication statusPublished - 1 Jun 2017

Keywords

  • Coulombian model
  • Eddy-current damping
  • Magnetic negative stiffness damper
  • Optimization
  • Parametric study
  • Passive damper

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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