B21 圧電センサと時間反転操作を用いた構造物の損傷同定に関する研究(OS12-3 スマート構造/センシング・モニタリング)

概要

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The goal of this paper is presenting the capability of the structural damage identification for the time reversal processing. One of the surfaced bonded piezoceramic sensors in unimorph configuration generates an incident pulse to propagate along the host structure should be inspected. The guided wave in the structure is scattered by the defect and reflected by the boundary, then the other piezoceramic sensors can generate the electrical signals from the scattered wave. Applying the time reversal processing, the time-reversed electrical signals are applied as excitations to the same piezoceramic sensors where the electrical signals are measured. The time-reversed wave travels back through the structure and is refocused on the point corresponding to the target defect. The location of the target defect can be identified by the numerical simulation. An illustrative numerical example to demonstrate the feasibility of the proposed method is performed for a rectangular aluminum plate with nine surface bonded unimorph piezoceramic sensors.
一般社団法人日本機械学会の論文
2005-08-22