Self–Excited Oscillation Due to the Fluid Discharge Over a Flexible Weir (2nd Report, Excitation Mechanism of a Hydroelastic Mode)

Katsumi Hisano, Shigehiko Kaneko

Research output: Contribution to journalArticle

3 Citations (Scopus)


The excitation mechanism of a self-excited oscillation due to the fluid discharge over a flexible werir was investigated both theoretically and experimentally. A new type of hydroelastic instability was discovered during test operations of the Super-Phenix LMFBR reactor in France. According to a recent report by Aita, this phenomenon includes two types of instability modes: one is the sloshing mode which means the oscillation of a weir associated with coupled sloshing modes of both feeding and restitution fluid collectors; the other is a hydroelastic mode which means the oscillation of a weir associated with fluid-shell modes. In this report, the excitation mechanism of a hydroelastic mode is discussed by calculating the excitation energy brought by discharge to the fluid-structure system. The theoretical results for the range of hydroelastic mode instability virtually agreed with the experimental data.

Original languageEnglish
Pages (from-to)1094-1100
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series C
Issue number525
Publication statusPublished - 1990 Jan 1
Externally publishedYes



  • FBR
  • Fluid Vibration
  • Theory of Vibration
  • Weir

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this