動的応答を用いたはりに生じたブリージングクラックの検出 : 混合型変分原理に基づく有限要素法を用いた検出法の提案(機械力学,計測,自動制御)

概要

論文の詳細を見る
Cracks can occur in machines and structures due to vibrations in operation. For safety, early detection of cracks is an important issue. So far many detection techniques of cracks using dynamic response have been proposed. Most of them assume that the cracks are open cracks, which are always open in vibration. However, actual fatigue cracks are breathing cracks, which open and close in vibration depending on sign of the bending moment. In a previous report, the authors presented a vibration analysis method for a beam with breathing cracks based on the mixed variational principle. This report proposes a detection technique of breathing cracks in a vibrating beam using the presented analysis method. Applicability of the proposed detection technique is confirmed by numerical simulation.
社団法人日本機械学会の論文
2007-11-25