Forced vibration studies of sagged cables with oil damper using a hybrid method

You Lin Xu, Z. Yu, J. M. Ko

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

This paper presents forced vibration studies of sagged cables with discrete oil dampers under harmonic excitation using an analytical/numerical hybrid method. The suggested hybrid method can take account of cable sag, cable internal damping, damper stiffness, damper mass, and others. The results show that an oil damper with appropriate parameters selected can effectively suppress the vibration of a cable under harmonic excitation. The cable sag, damper stiffness, cable internal damping, and others do affect damper performance. In particular, if a cable has symmetric modes of vibration near the frequency crossover points excited by harmonic loading, the damper may lose its function to suppress these modes of vibration. The possible reasons behind this and the measures to overcome the frequency crossover problem are explored and some preliminary results are presented.
Original languageEnglish
Pages (from-to)692-705
Number of pages14
JournalEngineering Structures
Volume20
Issue number8
DOIs
Publication statusPublished - 1 Jan 1998

Keywords

  • Damper
  • Frequency crossover
  • Hybrid method
  • Sagged cable
  • Vibration mitigation

ASJC Scopus subject areas

  • Civil and Structural Engineering

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