中国铁道科学2012，Vol.33Issue(3)：35-39,5.DOI:10.3969/j.issn.1001-4632.2012.03.06
基于列车动力响应的铁路桥梁损伤诊断方法
Damage Diagnosis Method for Railway Bridges Based on Train Dynamic Responses
摘要
Abstract
The stiffness reduction ratio of the bridge element is used as a damage index. Based on train-bridge coupled vibration theory, the sensitivities of train dynamic responses to damage indices are computed, and the sensitivity matrix and sensitivity equation are constructed. The sensitivity equation is solved with the constrained optimization method to get the damage indices of bridge elements, so that the bridge damage can be diagnosed. The diagnosis results of a simply-supported bridge indicate that the proposed damage identification method is insensitive to track irregularity. Bridge damage can be correctly diagnosed from the acceleration, velocity and displacement responses of the car body and the bogies. But the sensors can be placed more easily on the car body than on the bogies and the displacement responses are much more difficult to measure compared with other two kinds of responses. So the acceleration and velocity responses of the car body are preferred to be used as the inputs of bridge damage diagnosis. By the proposed method, both the single damage and multiple damage of the bridge can be identified.关键词
铁路桥梁/损伤诊断/列车动力响应/响应灵敏度Key words
Railway bridge/ Damage diagnosis/ Train dynamic response/ Response sensitivity分类
交通工程引用本文复制引用
战家旺,夏禾,安宁..基于列车动力响应的铁路桥梁损伤诊断方法[J].中国铁道科学,2012,33(3):35-39,5.基金项目
国家自然科学基金资助项目(51148005,51078029) （51148005,51078029）
中央高校基本科研业务费专项资金资助项目(2012JBM080) （2012JBM080）
