内部平面欠陥の局所共鳴周波数を精密に評価するための解析的二段階法
Honglin Yan1, Shuang Xu1, Jiarui Deng1
1School of Aerospace Engineering, Xiamen University, Xiamen 361005, PR China.
Ultrasonics
|February 4, 2026
まとめ
本研究は、非破壊検査における局所欠陥共鳴（LDR）の物理的メカニズムを明らかにします。新しい波ベースのアプローチは、さまざまな欠陥に対するLDR周波数を正確に予測し、欠陥特性評価を向上させます。
科学分野:
- 材料科学
- 機械工学
- 音響学
背景:
- 局所欠陥共鳴（LDR）は、平面欠陥の非破壊検査に効果的です。
- 現在のLDR生成メカニズムは、表面近傍および内部の欠陥に対して普遍的な適用性に欠けています。
研究 の 目的:
- LDR生成の物理的メカニズムを解明すること。
- LDR周波数予測のための普遍的に適用可能な方法を開発すること。
- 欠陥形状の定量的な評価を可能にすること。
主な方法:
- 波の反射と定常波の形成を解析する二段階アプローチ。
- 法線モード展開法を用いて、ガイド波と欠陥境界との相互作用を研究しました。
- レイリー法を用いて、LDR周波数に対する形状の影響を調査しました。
主要な成果:
- 欠陥パラメータとLDR周波数の間の定量的関係を確立しました。
- このアプローチは、表面近傍および内部の両方の欠陥に対するLDR生成に関する洞察を提供します。
- LDR周波数を用いた円形および楕円形欠陥の定量的な評価に成功しました。
結論:
- 提案された波ベースのアプローチは、LDR生成のより深い理解を提供します。
- この方法は、欠陥特性評価のためのLDRの精度と適用性を向上させます。
- 材料中の欠陥形状の精密な定量評価を可能にします。
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