Identification of non-linear hysteretic isolators from periodic vibration tests

Yiqing Ni, J. M. Ko, C. W. Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

137 Citations (Scopus)


This paper addresses the parameter identification of friction-type hysteretic isolators based on the versatile Bouc-Wen differential model. A frequency domain method is developed to identify the model parameters from the experimental data of periodic vibration tests. All the five parameters in the hysteretic model are obtained by a one-stage parameter estimate scheme. Numerical simulations show that the proposed method is insensitive to the noise in the observation signals. This method is then implemented to model and identify the experimental hysteresis loops of wire-cable vibration isolators, and the accuracy of the parameter identification is verified by comparing the measured and identified harmonic components of the hysteretic restoring force.
Original languageEnglish
Pages (from-to)737-756
Number of pages20
JournalJournal of Sound and Vibration
Issue number4
Publication statusPublished - 5 Nov 1998

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering


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