加速度応答のウェーブレット変換による履歴復元力特性を有する構造物の非弾性挙動への変化の検出(機械力学,計測,自動制御)

概要

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In this paper, we propose a wavelet-based method to detect the discontinuities of the tangent stiffness of a hysteretic restoring force from acceleration data. The discontinuities of the tangent stiffness indicate that the system has suffered inelastic deformation. Therefore we can estimate the damage of the system to detect the discontinuities of the tangent stiffness. We confirm numerically and experimentally that the occurrence of the discontinuity can be detected. The experiment is carried out using the 5 th-story structural model installed by lead rubber bearing (LRB) with hysteretic characteristics of restoring force. The experiment results show that wavelet transform makes it possible to estimate the inelastic excursions to the elastic region, when a non-stationary wave is inputted into the structure.
社団法人日本機械学会の論文
2007-05-25