基于应变时程数据的损伤识别方法

英文篇名：A DAMAGE IDENTIFICATION METHOD BASED ON THE TIME-HISTORY DATA OF STRAIN
中文刊名：工业建筑
英文刊名：Industrial Construction
作者：刘蜜 ; 徐赵东
英文作者：Liu Mi Xu Zhaodong (RC&PC Key Laboratory of Education Ministry ; Southeast University ; Nanjing 210096 ; China)
中文关键词：损伤识别 ; 应变模态曲率差 ; 应变能量差 ; 应变能量曲率差
英文关键词：damage identification ; strain mode curvature difference ; strain energy difference ; strain energy-curvature difference
出版日期：2010-03-20
机构：东南大学混凝土及预应力混凝土教育部重点实验室;
年：2010
期：03
出版单位：工业建筑

摘要

通过分析传统的应变模态方法,并在此基础上采用应变模态曲率差指标对一悬臂梁进行了损伤识别,发现该方法受到振型求解以及激励力的影响,识别效果不理想。所以对基于应变能量的损伤识别指标开展研究,发现该指标能够在不受激励力的影响下,避开复杂的振型求解,并通过提出的放大系数k对识别结果进行后处理,较好地提高了损伤识别效果。
Based on the method of the time-history data of strain,the damage identification of a cantilever beam is studied in this paper. By using the method of strain mode curvature difference,this index is affected by vibration mode and exciting force and can’t satisfy the request of damage identification. By using the energy method based on strain which is identified to avoid the effect of vibration mode and exciting force,the effect of the damage identification has been greatly improved,especially after amplifying processing with a magnification factors k which is proposed in this paper.

引文

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