基于振型拟合的结构损伤诊断方法  

The Diagnosis Method of Structure Damage Based on Mode Shape Polyfit

作　　者：胡宇宏[1] 皮智谋 

机构地区：[1]湖南工业职业技术学院,长沙410208

出　　处：《机械设计与研究》2013年第2期111-113,共3页Machine Design And Research

摘　　要：工程结构在使用的过程中,由于载荷的作用将产生不同位置、不同程度的损伤。为了保证结构的安全,需要及时诊断出这些损伤的位置,以便对结构使用的可靠性进行合理的评估。提出了一种基于振型拟合的结构损伤诊断方法。它是用损伤系数作为诊断损伤的敏感因子。它不需要知道结构损伤前即完整结构的参数信息。文中详细讨论了这种方法,用仿真算例说明了这种方法的有效性和可行性。并用实验验证了这种方法的有效性和可行性。During operation of engineering structure, damages of different degrees and at different parts will appear due to action of the loading. To guarantee the safety of the eogineering structure, checking out the positions of these damages is needed in order to conduct a reasonable estimate of the reliability of structure operation. This paper puts forward a structural damage detection method that is the diagnosis method of structure damage based on mode shape polyfit. It takes the damage index as the sensitive factor of diagnosing damages, and it does not need the structure parameter information prior to structure damage. This paper discusses in detail the method and explains its efficiency and feasibility by using calculation example. Its efficiency and feasibility was verified through experiment.

关 键 词：结构损伤诊断 振型 拟合 损伤系数 

分 类 号：TH113.1[机械工程—机械设计及理论]