發(fā)布時(shí)間：2018-11-20 14:34

【摘要】：本文致力于大型索支承結(jié)構(gòu)的結(jié)構(gòu)健康監(jiān)測(cè)問題,以蘇拉馬都大橋?yàn)楸尘敖�立有限元模�?以下簡稱為S橋),基于線性關(guān)系假說,合理選取應(yīng)變監(jiān)測(cè)量,剔除不同形式載荷的不利影響,實(shí)現(xiàn)對(duì)受損索健康狀態(tài)的準(zhǔn)確識(shí)別。本文主要研究工作可概述如下：(1)以S橋?yàn)檠芯繉?duì)象,對(duì)原有模型重新進(jìn)行單元?jiǎng)澐纸�立新的有限元模�?以滿足不同形式載荷的加載條件。并針對(duì)不同載荷形式,選取若干種荷載工況,考慮其對(duì)結(jié)構(gòu)健康狀態(tài)識(shí)別的影響。(2)基于線性關(guān)系假說和多目標(biāo)優(yōu)化算法,研究了如何利用盡可能少的橋梁應(yīng)變監(jiān)測(cè)數(shù)據(jù),實(shí)現(xiàn)了對(duì)受損索在不同損傷數(shù)目和不同損傷程度下的準(zhǔn)確識(shí)別。同時(shí)能夠剔除集中載荷變化對(duì)受損索健康狀態(tài)識(shí)別的不利影響。(3)基于線性關(guān)系假說和多目標(biāo)優(yōu)化算法,研究了如何利用盡可能少的橋梁應(yīng)變監(jiān)測(cè)數(shù)據(jù),實(shí)現(xiàn)了對(duì)受損索在不同損傷數(shù)目和不同損傷程度下的準(zhǔn)確識(shí)別。同時(shí)能夠剔除分布載荷變化對(duì)受損索健康狀態(tài)識(shí)別的不利影響。(4)研究了不同載荷形式的組合工況對(duì)受損索識(shí)別的不利影響,對(duì)識(shí)別結(jié)果加以對(duì)比分析,通過試算選取合理的監(jiān)測(cè)量以求弱化其不利影響,以實(shí)現(xiàn)對(duì)結(jié)構(gòu)健康狀態(tài)的準(zhǔn)確識(shí)別。
[Abstract]:This paper is devoted to the problem of structural health monitoring of large cable-supported structures. Taking Sulamadu Bridge as the background, a finite element model (hereinafter referred to as "S Bridge") is established. Based on the hypothesis of linear relationship, the strain monitoring quantity is reasonably selected. Eliminate the adverse effects of different forms of load, and realize the accurate identification of the damaged cable health state. The main research work of this paper can be summarized as follows: (1) taking S bridge as the research object, a new finite element model is established by redividing the original model to meet the loading conditions of different forms of load. According to different load forms, several load conditions are selected, and their influence on structural health state identification is considered. (2) based on linear relation hypothesis and multi-objective optimization algorithm, how to use as few bridge strain monitoring data as possible is studied. The accurate identification of damaged cable under different damage number and different damage degree is realized. At the same time, it can eliminate the adverse effect of the change of concentrated load on the health status of damaged cable. (3) based on the hypothesis of linear relationship and the multi-objective optimization algorithm, the paper studies how to use as few bridge strain monitoring data as possible. The accurate identification of damaged cable under different damage number and different damage degree is realized. At the same time, it can eliminate the adverse effect of the change of distributed load on the identification of damaged cable health. (4) the adverse effects of different load forms on the identification of damaged cable are studied, and the identification results are compared and analyzed. Reasonable monitoring quantity is selected by trial calculation in order to weaken its adverse effect and realize the accurate identification of the health state of the structure.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U446

【相似文獻(xiàn)】

相關(guān)期刊論文 前8條

1 譚亮;;iK=I(a—blgl)中 a、b 的關(guān)系探討[J];電鍍與精飾;1985年01期

2 魯薇華;Al—Si—Cu—Mg活塞合金機(jī)械性能之間相關(guān)關(guān)系的探討[J];內(nèi)燃機(jī)配件;1987年01期

3 石來德;;機(jī)械的有限壽命設(shè)計(jì)和試驗(yàn) 第九講 材料和機(jī)件的抗力指標(biāo)(二)[J];建筑機(jī)械;1987年03期

4 王銘鈞,殷明;硅橡膠輻射交聯(lián)研究Ⅰ.溶膠分?jǐn)?shù)與輻照劑量間的關(guān)系[J];輻射研究與輻射工藝學(xué)報(bào);1988年02期

5 吳澤云;;關(guān)于比值系數(shù)K′的計(jì)算[J];化工自動(dòng)化及儀表;1981年01期

6 蔡廣基,張麗清,劉永清;投入產(chǎn)出的線性假設(shè)分析[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);1998年10期

7 ;你問我答[J];家電科技;2009年13期

8 ;[J];;年期

相關(guān)會(huì)議論文 前1條

1 王仲琴;趙晶晶;;中藥酊劑中甲醇?xì)埩袅康臏y(cè)定[A];中國畜牧獸醫(yī)學(xué)會(huì)中獸醫(yī)學(xué)分會(huì)2013年學(xué)術(shù)年會(huì)論文集[C];2013年

相關(guān)重要報(bào)紙文章 前2條

1 趙劍;川維PVA溶液濃度與黏度關(guān)系分析法推翻經(jīng)典理論[N];中國石化報(bào);2010年

2 耶魯大學(xué)金融經(jīng)濟(jì)學(xué)教授 陳志武　;洞察商業(yè)模式背后的數(shù)學(xué)邏輯[N];江蘇經(jīng)濟(jì)報(bào);2012年

相關(guān)碩士學(xué)位論文 前1條

1 王靜;不同載荷條件下基于應(yīng)變監(jiān)測(cè)的支承索損傷識(shí)別[D];東南大學(xué);2015年

，

本文編號(hào)：2345171