実験モード解析によるステンレス配管の一様減肉の非破壊評価

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  • Nondestructive Evaluation of Uniform Wall Thinning of Stainless Steel Pipes by Experimental Modal Analysis

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<p>In this study, experimental modal analysis system for evaluating modal characteristics of piping has been constructed by combining experimental setup and MATLAB programming. The experimental setup could monitor piping vibration produced by hammering. The MATLAB programming could identify such modal characteristics as natural frequency and modal damping ratio from the vibration data obtained by the experimental setup. The constructed experimental modal analysis system was applied to stainless steel pipes with different wall thickness, and the modal characteristics available for the evaluation of uniform wall thinning of the pipes were discussed by comparing the relationship between the pipe wall thickness and the modal characteristics. It was found that the modal damping ratio of mode 1 was promising parameter for the evaluation of the pipe wall thinning.</p>

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