基于桥梁结构动力特性损伤识别方法的研究

本文对基于振动损伤识别技术进行了研究，基于振动损伤识别技术主要是认为损伤将显著改变结构的刚度、质量或耗能能力，进而引起所测结构动力特征或响应的改变。通过从实测数据中提取全桥不同部位动力参数信息或衍生信息，并对比结构无损状态下的相应信息，来实现结构的损伤识别及状态评估。文中对一简单结构悬臂梁模型进行损伤识别仿真分析，研究其动力特性及其衍生信息与损伤位置及程度的关系，得出简单结构悬臂梁模型损伤动力特性的变化规律，并通过动力特性变化及曲率模态实现了对简单结构悬臂梁模型的损伤识别。

Study Of Damnification Identification Method Based On Bridge Dynamic Characteristic

This paper studies damnification identification technique based on libration. It believes that damnification can change the stiffness, quality and ability of energy dissipation so as to cause the change of dynamic characteristics and response. Through the kinetic parameter information and derivation information of different bridge part, comparing with information under nondestructive status, we can identify the damnification and evaluate its status. Through the change of dynamic characteristics and curvature medal, this paper studies the relationship among its dynamic characteristics and derivation information, damnification position and degree, educes the change rules of damnification dynamic characteristics of simple cantilever beam model.