基于曲率模态理论的简支梁损伤辨识研究

Damage Identification of Simply Supported Beam Based on the Theory of Curvature Mode

选取结构中常见的构件——简支梁,利用有限元软件ANSYS建立有限元模型.通过模拟跨中损伤,分析模态振型位移值,得出曲率模态值.对比分析曲率模态在损伤处的变化规律,得出损伤与相应参数的关系.总结曲率模态在损伤处的应用规律,以期使曲率模态辨识损伤理论在其他结构中得到更好的应用.

A common structure--simply supported beam was selected to construct finite element model by ANSYS. Curvature mode was obtained by stimulating the damage of mid-span and analyzing modal displacement. Variation of curvature mode at damage region was analyzed and the relationship of injure and corresponding parameters was obtained. Finally, application law of curvature mode at injure region was summarized so that theory of curvature mode was better used at other structure.