文献类型：期刊文献

中文题名：结构损伤检测的一种改进附加质量方法

英文题名：STRUCTURAL DAMAGE DETECTION METHOD BY ADDING KNOWN MASSES

作者：金卫民[1];杨秋伟[1]

机构：[1]绍兴文理学院土木工程系

年份：2010

期号：4

起止页码：542

中文期刊名：机械强度

外文期刊名：Journal of Mechanical Strength

收录：CSTPCD、、Scopus、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：浙江省教育厅科研计划项目(Y200805568)~~

语种：中文

中文关键词：损伤检测;附加质量;频率灵敏度;柔度灵敏度

外文关键词：Damage detection; Added masses; Natural frequency sensitivity; Flexibility sensitivity

中文摘要：提出一种改进的附加质量方法用于结构的损伤检测中。通过在结构的某些部位处附加已知的集中质量块,测量得到附加质量系统的低阶模态,将这些新的模态及原结构的模态联合起来,通过频率灵敏度和柔度灵敏度建立损伤识别方程求解损伤参数。以一个二层的框架结构为算例,对所提的改进附加质量方法进行验证。研究结果表明,仅需要测量原结构和附加质量后结构的少数低阶模态信息,即可以比较准确地检测出结构的损伤,说明附加质量方法的可行性。

外文摘要：Damage detection method by adding known masses is improved. The proposed method identifies structural damage by combining the natural frequency sensitivity and flexibility sensitivity of the original structure and the mass-modified structure. By adding known masses to the physical structure, measuring the lower modes of the mass-modified structure, and then using these new data as well as the original test information, structural damages can be detected using the eigenvalue perturbation and the flexibility sensitivity technique. The feasibility of the methodology is demonstrated analytically on a two-storey structure. Results show that the proposed method may be a promising tool to be used in damage identification for structures.