列車通過時における鉄道橋の動的な変位計測へのサンプリングモアレカメラの適用

概要

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In this paper, a sampling moirè camera is applied to a dynamic displacement measurement of a steel railway bridge while a train is passing. A sampling moirè method is one of the convenient phase analysis methods. The accuracy of phase difference analysis is from 1/100 to 1/1000 of the grating pitches. This method is useful to a real-time displacement measurement because the two-dimensional phase analysis can be performed from a single shot two-dimensional grating image. Recently, we developed a sampling moirè camera which can analyze the two-dimensional displacement images in real-time by using sampling moirè method. The camera can measure dynamic displacement of the object. The experimental result of a dynamic displacement measurement of a steel railway bridge while a train passing shows that the variation of the measurement displacement is similar to the predicted displacement behavior. The possibility to apply the sampling moirè camera for the displacement measurement of a steel railway bridge is confirmed.
日本実験力学会の論文