【摘要】 近年来对结构的损伤检测方法较多,本文利用有限元分析软件MSC/Patran&Nastran对简支梁结构进行模态分析。根据结构损伤前后的振型参数变化,用一阶振型比、振型曲率、振型曲率差和一阶振型曲率比等指标对结构进行了损伤检测的数值研究,分析结果表明几个指标对损伤比较敏感,对结构损伤检测具有一定参考价值。更多还原

【Abstract】 There are a lot of research in detecting structural damage.The paper makes a mode analysis of simple supported beam by analysis software of MSC/Patran&Nastran.According to the mode shapes parameter variation before and after structural damage,the paper makes a value research of structural damage detection by indices like first-order mode shapes,curvature mode shapes,curvature mode shapes difference and first-order curvature mode shapes.The result shows that the indices are sensitive to the damage,with certain reference value in detecting structural damage.更多还原