光ファイバによる柔軟はりの実用的な振動モードフィルタリング方法

概要

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This paper describes a simple modal filtering method for one-dimensional structures using a two -mode optical fiber as a distributed-parameter sensor. In comparison to the method presented in a previous paper, which employs the longitudinal spatial variation of the sensor, this method only requires placing the sensor straight along the beam. A procedure is derived for the design of modal filters for a simply-supported beam, the most typical example of a one-dimensional structure. According to this procedure, the sensor is mounted on the lower and upper surfaces of the beam along the antinodes of the desired vibration-mode. The procedure is extended to the case of a cantilevered beam and a practical mode filtering method is discussed. Finally, experimental results confirm the predictions and demonstrate efficient vibration-mode filtering.
一般社団法人日本機械学会の論文
1999-11-25