116 拡張型有限要素を用いた固有振動数特性に基づくき裂同定(システム同定,OS-9 モード解析とその応用関連技術,総合テーマ「伝統を,未来へ!」) 116 Crack detection based on eigen frequency property using extended finite element
The crack position in a cantilever beam is identified. The vibration experiment is conducted and the eigenfrequency data is obtained by measuring the acceleration of the beam tip. The extended finite element method is used to analyze the vibration problem. The evaluation function is calculated using the eigenvalues of both experimental and numerical simulation, and the identification is conducted based on the gradient of the evaluation function. The accuracy of longitudinal direction is much more higher than that of thickness direction. That difference is caused by the characteristic distribution of eigenvalues.
- Dynamics & Design Conference
Dynamics & Design Conference 2010, "116-1"-"116-4", 2010-09-14