Sensor noise caused by vibrations of flaw detection probe generated in helical heating tubes in a fast breeder reactor and its countermeasures (2nd report, numerical simulations of probe vibration)

Takumi Inoue, Atsuo Sueoka, Takeshi Maehara, Yutaka Nakano, Hiroyuki Kanemoto, Yukitaka Murakami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A diagnosis of a helical heating tube installed in a fast breeder reactor is operated by an insertion of an eddy current testing (ECT) probe with magnetic sensor into the tube. An undesirable vibration of the ECT probe always happens under a certain condition and makes the diagnosis difficult. The cause of the vibration has not been clear. Numerical simulation of the vibration is implemented on the assumption that the vibration is caused by the Coulomb's friction. An analytical model is derived as a large scale nonlinear vibration system and a lot of computational costs are ordinarily required to carry out the simulations. The Transfer Influence Coefficient Method is applied so that the simulation is efficiently carried out. The results of simulation qualitatively agree well with the experimental results. It confirms the validity of the assumption that the vibration is caused by the Coulomb's friction.

Original languageEnglish
Pages (from-to)380-387
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume72
Issue number2
Publication statusPublished - Feb 2006

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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