基于卡尔曼滤波器的桥梁损伤快速诊断方法研究

发布时间：2018-01-09 06:09

  本文关键词：基于卡尔曼滤波器的桥梁损伤快速诊断方法研究　出处：《哈尔滨工业大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 中小型桥梁 结构损伤快速诊断 卡尔曼滤波器 模型试验

【摘要】：针对传统桥梁荷载试验往往需要长时间中断交通的问题,提出基于卡尔曼滤波器的中小型桥梁结构损伤快速诊断方法,从而为短暂中断或不中断交通条件下的桥梁承载能力快速评定提供一定的理论支撑。系统总结了国内外关于桥梁结构损伤诊断的研究成果和发展趋势,并着重分析了桥梁结构损伤快速诊断的关键问题。在此基础上,将卡尔曼滤波器算法理论与桥梁损伤诊断方法相结合,提出了利用卡尔曼滤波器快速诊断桥梁结构损伤的整体框架。重点研究了稳态卡尔曼滤波器的算法理论,针对结构激励对卡尔曼滤波器判别桥梁损伤结果的影响问题,利用短暂中断交通条件下桥梁损伤前后激励相似的特点,构造关于卡尔曼滤波器预测响应残差相关函数差的损伤诊断因子,从而有效减弱激励对损伤诊断结果的干扰。以模型试验为手段,比较分析了所提出的损伤诊断因子对结构激励的敏感性,探讨了卡尔曼滤波器在桥梁结构损伤快速诊断中的关键问题,并对卡尔曼滤波器快速诊断桥梁损伤的准确程度进行了验证。在上述研究基础上,利用一座实际桥梁的长期监测数据,实现卡尔曼滤波器快速诊断桥梁结构损伤的工程验证,结果表明卡尔曼滤波器能够成为不中断交通条件下快速诊断桥梁损伤的一种有效手段。
[Abstract]:In view of the traditional bridge load test often takes a long time to break the traffic problems, put forward methods for rapid diagnosis of injury of small and medium-sized bridge structure based on Calman filter, which is a brief interruption or interrupt bridge traffic conditions of the carrying capacity of fast evaluation and provide some theory support. Summarized the research achievements and development trend about the diagnosis of bridge structure damage at home and abroad, and analyzes the key problems of rapid diagnosis of structure damage of the bridge. On this basis, combining the theory of bridge damage diagnosis method and filter algorithm Calman, put forward the overall framework of the rapid diagnosis of the damage of bridge structure by using Calman filter. Focus on the theory of steady Calman filter algorithm, aiming at the problems affecting the incentive structure the results of discriminant bridge damage Calman filter, using a short break bridge traffic conditions Before and after the damage of incentive similar characteristics, structural damage diagnosis on predicting the response factor residual correlation function difference of Calman filter, so as to effectively weaken the incentive interference on the damage diagnosis results. The model test method, comparative analysis of the proposed damage detection sensitivity factor on the incentive structure, discusses the key problems of Calman filter in rapid diagnosis of injury in the bridge structure, the degree of accuracy and the Calman filter for rapid diagnosis of bridge damage is verified. Based on the above research, long-term monitoring data using an actual bridge, to achieve rapid diagnosis of bridge structural damage Calman filter engineering verification, the results show that the Calman filter can become the traffic conditions of rapid diagnosis is an effective means of bridge the injury is not interrupted.

【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U446
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本文编号：1400272