2235 超音波法を用いた応力測定に関する基礎的研究 : 周波数解析の適用(S15-3 実験力学と材料評価(3),S15 実験力学と材料評価)

概要

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It is important to evaluate the stress conditions of structural member parts. In one of the stress measurement techniques, there is the acoustoelasticity using the ultrasonic wave. However, the measurement accuracy of the technique is greatly influenced by the measurement environment. In this study, the method which evaluates the stress conditions by the obtained features from the time-frequency analysis of the reflective echo of ultrasonic wave is proposed. Wavelet transform was used for the proposing method. After the transform, the subtraction processing which deducted the result in the unloaded condition from the result in the loaded condition was conducted. And the relationships between the features of the processing results and the stress were recognized. Therefore, the stress were evaluated from the reflective echo by the multiple regression analysis that deals with the relations. The validity of the proposed method was confirmed by comparing the obtained stress by the experiment and this method.
社団法人日本機械学会の論文
2007-09-07