溶接学会論文集
Online ISSN : 2434-8252
Print ISSN : 0288-4771
電磁超音波共鳴スペクトルによる鋼板の減肉評価
-電磁超音波センサを用いた鋼構造物の板厚および応力評価法の検討-
三谷 欣也中山 吉晴金井 英一望月 正人豊田 政男
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2007 年 25 巻 4 号 p. 507-513

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In the control of maintenance of steel structures, it is important to measure quantitatively the wall-thinning and the actual stress of damaged and depleted materials by a non-destructive method. The main purpose of this study is to establish the thickness and the stress measurement technology for steel structures by using the electromagnetic acoustic method which does not require a coupling medium. In this paper, an experiment using specimens that imitated the effects of localized corrosion was performed by an electromagnetic acoustic transducer, in order to examine a method for a wall-thinning measurement using resonance methods. As a result, by focusing on the amount of peak amplitude of the resonance spectrum equivalent to each thickness it was confirmed that measurement of the wall-thinning depth and the wall-thinning area was possible. In addition, by the examination using a numerical simulation of the resonance spectrum, this method's detection principle was clarified and the new wall-thinning evaluation was established.

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© 2007 社団法人 溶接学会
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