本文關(guān)鍵詞：基于卡爾曼濾波器的橋梁損傷快速診斷方法研究　出處：《哈爾濱工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 中小型橋梁 結(jié)構(gòu)損傷快速診斷 卡爾曼濾波器 模型試驗

【摘要】：針對傳統(tǒng)橋梁荷載試驗往往需要長時間中斷交通的問題,提出基于卡爾曼濾波器的中小型橋梁結(jié)構(gòu)損傷快速診斷方法,從而為短暫中斷或不中斷交通條件下的橋梁承載能力快速評定提供一定的理論支撐。系統(tǒng)總結(jié)了國內(nèi)外關(guān)于橋梁結(jié)構(gòu)損傷診斷的研究成果和發(fā)展趨勢,并著重分析了橋梁結(jié)構(gòu)損傷快速診斷的關(guān)鍵問題。在此基礎(chǔ)上,將卡爾曼濾波器算法理論與橋梁損傷診斷方法相結(jié)合,提出了利用卡爾曼濾波器快速診斷橋梁結(jié)構(gòu)損傷的整體框架。重點研究了穩(wěn)態(tài)卡爾曼濾波器的算法理論,針對結(jié)構(gòu)激勵對卡爾曼濾波器判別橋梁損傷結(jié)果的影響問題,利用短暫中斷交通條件下橋梁損傷前后激勵相似的特點,構(gòu)造關(guān)于卡爾曼濾波器預(yù)測響應(yīng)殘差相關(guān)函數(shù)差的損傷診斷因子,從而有效減弱激勵對損傷診斷結(jié)果的干擾。以模型試驗為手段,比較分析了所提出的損傷診斷因子對結(jié)構(gòu)激勵的敏感性,探討了卡爾曼濾波器在橋梁結(jié)構(gòu)損傷快速診斷中的關(guān)鍵問題,并對卡爾曼濾波器快速診斷橋梁損傷的準確程度進行了驗證。在上述研究基礎(chǔ)上,利用一座實際橋梁的長期監(jiān)測數(shù)據(jù),實現(xiàn)卡爾曼濾波器快速診斷橋梁結(jié)構(gòu)損傷的工程驗證,結(jié)果表明卡爾曼濾波器能夠成為不中斷交通條件下快速診斷橋梁損傷的一種有效手段。
[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.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U446
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本文編號：1400272