157 排水管の閉塞物の診断法

概要

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The problem that the drainpipe in the power plant get blocked occurs. The blockage part of pipe has been presumed based on the experience so far. However, it is impossible to detect the blockage part surely in conventional methods. In the present study, the new method is investigated,which is to detect the blockage of the drainpipe by the vibration analysis. The vibration measurement and the modal analysis are done in the present study. The natural mode, natural frequency, and the experimental modal damping ratio can be obtained by this experimental analysis. In this experiment, pipe and U bolt of actual piping system are used, and compound of clay and sawdust is used as blocker. As the experimental results, it has been understood that the modal damping ratio of the blockage drainpipe is larger than the modal damping ratio of normal drainpipe.
一般社団法人日本機械学会の論文
2011-09-05