Excitation mechanism of rain–wind induced cable vibration in a wind tunnel

Haiquan Jing, Yong Xia, Hui Li, Youlin Xu, Yongle Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

36 Citations (Scopus)

Abstract

However, quantitative analyses of the RWIV mechanism using the real water rivulets are rare. The RWIV of a cable model is tested in an open-jet wind tunnel. The movement and the geometry of the upper rivulet and the vibration of the cable are obtained by videogrammetry. The coupling of the upper rivulet and cable vibration is shown to be the main excitation mechanism of RWIV. In particular, the oscillating upper rivulet induces the boundary layer to attach to the cable and generates aerodynamic forces, which produce a positive work and excite the cable to vibrate. In turn, the cable vibration harmonizes the upper rivulet along the cable. To verify the proposed mechanism, a numerical model is established using the aerodynamic coefficients measured in dry cable tests. The numerical results are in agreement with the experiments. The effect of the damping ratio on the RWIV amplitude is also experimentally and numerically investigated.
Original languageEnglish
Pages (from-to)32-47
Number of pages16
JournalJournal of Fluids and Structures
Volume68
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Cable
  • Excitation mechanism
  • Rain–wind induced vibration
  • Rivulet
  • Videogrammetry
  • Wind tunnel test

ASJC Scopus subject areas

  • Mechanical Engineering

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