S0302-2-4 配管を横断伝搬する超音波挙動の3次元有限要素解析([S0302-2]超音波非破壊評価の高精度化(2))

概要

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Ultrasonic measurement has been used for liquid flow velocity measurement in industrial pipe structure. Though a pitch-catch measurement from outer surface of a pipe is required, S/N ratio of the transmitted echo through pipe become worth due to the complicate layout of the pipe and ultrasonic wedge. Then in this study, we applied large scale three dimensional FEM analyses for the pitch-catch measurement of the pipe structures and accurate ultrasonic travelling behaviors were investigated. Especially for pipe material, difference of the transmitted and reflected echoes between steel pipe and PVC pipe were investigated. As the result, due to the difference of the impedance of steel and PVC, large differences were observed in ultrasonic propagation behavior which relate to SN ratio of the industrial flow velocity measurement in pipe.
一般社団法人日本機械学会の論文
2010-09-04