中国铁道科学2018，Vol.39Issue(2)：37-43,7.DOI:10.3969/j.issn.1001-4632.2018.02.05
一种基于频响函数相似性的铁路桥墩损伤识别方法
Damage Identification Method for Railway Pier Based on Frequency Response Function Similarity
摘要
Abstract
A method based on model updating theory and frequency response function similarity was proposed for the quantitative damage identification of railway piers.The frequency response function similarity index in specific frequency bandwidth and natural vibration frequencies were used to construct objective function.The damage degrees of the pier body and foundation constraint spring were respectively defined as the identification indexes.The damage assessment for railway simply-supported beam bridge pier was implemented by using optimization algorithm.Results show that the frequency response function similarity index is sensitive to damage in the frequency band containing the first order and second order frequencies.By the proposed damage identification method,both the damage location and damage degree can be identified accurately with high computational efficiency.The convergence can be achieved through about 10 iterations.The identified damage of a model pier agrees well with the simulated one,which has further verified the reliability and practicability of the proposed method.关键词
铁路简支梁桥/桥墩/损伤/识别/频响函数相似性/有限元模型修正Key words
Railway simply-supported beam bridge/Pier/Damage/Identification/Frequency response function similarity/FE model updating分类
交通工程引用本文复制引用
战家旺,闫宇智,强伟亮,安志刚,张楠..一种基于频响函数相似性的铁路桥墩损伤识别方法[J].中国铁道科学,2018,39(2):37-43,7.基金项目
国家自然科学基金资助项目(51678032) （51678032）
中国铁道总公司科技研究开发计划项目(2017G002-B) （2017G002-B）
