レーザー変位計を用いた振動応力計測方法の開発

概要

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In thermal and nuclear power plants where many piping are connected to vibratory sources like pumps, it is important to estimate vibrational stress efficiently to keep the plant operating safety. This study proposed a method using multiple laser displacement sensors to measure vibrational stress directly in contactless. Furthermore, the applicability of the method was verified by vibration tests using sinusoidal and random waves. The vibrational stresses measured by the proposed method were compared with the result obtained from conventional method using strain gauges for the vibration tests. These results demonstrated that the proposed method could have sufficient measurement accuracy for practical use.