Method to estimate equivalent natural period with micro-tremor measurements

Munemasa Tokunaga, Masamichi Sogabe, Fumiaki Uehan, Hiroyuki Tanimura, Yoshitaka Murono, Kiyoshi Ono

Research output: Contribution to journalArticle

Abstract

The object of this paper is to propose a method to estimate the equivalent natural period with micro-tremor measurements on the basis of the correlation between the natural frequency and the yield frequency. A method, combining the Eigensystem Realization Algorithm and some empirical hypotheses of vibration modes, was proposed for identifying the first natural vibration modes of structures. A ratio of the yield frequency to the natural frequency was mostly a certain constant value and the average value of the ratio depends on the type of structures. This paper proposes a simple procedure for estimating the yield frequency with micro-tremor measurements.

Original languageEnglish
Pages (from-to)21-27
Number of pages7
JournalQuarterly Report of RTRI (Railway Technical Research Institute) (Japan)
Volume53
Issue number1
DOIs
Publication statusPublished - 2012 Feb
Externally publishedYes

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Natural frequencies

Keywords

  • Eigensystem Realization Algorithm
  • Equivalent natural period
  • Micro-tremor measurement
  • Modal identification
  • Natural period
  • Nonlinear analysis

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Method to estimate equivalent natural period with micro-tremor measurements. / Tokunaga, Munemasa; Sogabe, Masamichi; Uehan, Fumiaki; Tanimura, Hiroyuki; Murono, Yoshitaka; Ono, Kiyoshi.

In: Quarterly Report of RTRI (Railway Technical Research Institute) (Japan), Vol. 53, No. 1, 02.2012, p. 21-27.

Research output: Contribution to journalArticle

Tokunaga, Munemasa ; Sogabe, Masamichi ; Uehan, Fumiaki ; Tanimura, Hiroyuki ; Murono, Yoshitaka ; Ono, Kiyoshi. / Method to estimate equivalent natural period with micro-tremor measurements. In: Quarterly Report of RTRI (Railway Technical Research Institute) (Japan). 2012 ; Vol. 53, No. 1. pp. 21-27.
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