發(fā)布時間：2018-04-24 12:45

  本文選題：斜拉索 + TMD��； 參考：《河北工業(yè)大學》2015年碩士論文

【摘要】：隨著我國經(jīng)濟水平的不斷發(fā)展,我國的橋梁設計和施工水平也逐漸躋身到世界先進行列,尤其改革開放后,我國陸續(xù)出現(xiàn)了一大批造型優(yōu)美、結(jié)構(gòu)復雜、跨越能力強的大型橋梁,其中以超大型的懸索橋和斜拉橋最具代表性。超大型的懸索橋和斜拉橋不僅設計施工困難,其后期運營維護也存在諸多問題,斜拉索是斜拉橋和懸索橋的主要受力構(gòu)件,由于拉索的質(zhì)量輕、抗彎剛度小、阻尼小,所以極易受到風荷載、雨荷載、汽車荷載的激勵產(chǎn)生不同形式的振動,拉索長時間大幅度的振動會造成拉索錨固端疲勞破壞,主梁結(jié)構(gòu)振幅過大影響汽車行駛的舒適性。為了控制拉索振動,通常采用的方法有在結(jié)構(gòu)中加入合適的阻尼器、采用空氣動力學的設計方法改變索表面形式、在結(jié)構(gòu)中添加輔助索等,這些方法雖然在一定程度上可以緩解拉索的振動,但是也存在諸多局限性。調(diào)諧質(zhì)量阻尼器(以下簡稱TMD)作為一種較成熟的被動控制技術,在高層建筑和大跨度橋梁主梁上早已得到了廣泛的應用,目前世界上許多著名的大型高層結(jié)構(gòu)采用多個調(diào)諧質(zhì)量阻尼器(MTMD)作為結(jié)構(gòu)抗振設計方法。TMD在抑制拉索振動方面具有很多顯著優(yōu)勢,比如不需要外部控制設備、安裝位置不受限制、安裝方便、維修維護成本低等,這些都有利于TMD早日應用到拉索抗振上。當然目前TMD應用到拉索上還存在一些困難,比如TMD的具體結(jié)構(gòu)形式、TMD的參數(shù)配置依據(jù)等,這些都是工程技術人員亟待解決的問題。在這一背景下,對TMD進行理論分析、有限元仿真模擬和試驗研究具有極強的工程實踐意義,本課題在對國內(nèi)外相關文獻做了大量調(diào)研的基礎上做了如下工作:1.了解TMD的吸振原理和數(shù)學方法推導拉索-TMD系統(tǒng)耦合振動的方法。2.運用有限元仿真的方法,設計了幾種不同的TMD形式,并對他們進行了相應的參數(shù)分析,通過對數(shù)據(jù)的匯總分析,找到了TMD參數(shù)與拉索阻尼比的規(guī)律性結(jié)論,為下一步的試驗提供指導意見。3.在有限元模擬結(jié)果的指導下,設計了一種可供試驗研究的TMD模型,借助現(xiàn)有的試驗設備完成了單個TMD的試驗研究,通過對試驗數(shù)據(jù)的后期處理,找到了TMD參數(shù)與拉索阻尼比的規(guī)律性結(jié)論,其結(jié)果與有限元分析結(jié)果基本吻合,驗證了有限元分析方法的正確性和有限元分析結(jié)果的準確性。
[Abstract]:With the continuous development of our country's economic level, the level of bridge design and construction in our country has gradually become one of the advanced ranks in the world, especially after the reform and opening up, a large number of beautiful shapes and complicated structures have emerged one after another in our country. The super-large suspension bridge and cable-stayed bridge are the most representative bridge. Super large suspension bridges and cable-stayed bridges are not only difficult in design and construction, but also have many problems in their later operation and maintenance. Cable is the main force member of cable-stayed bridges and suspension bridges, due to the light weight of cables, low flexural stiffness and small damping. Therefore, it is easy to be subjected to wind load, rain load, automobile load excitation to produce different forms of vibration, cable vibration for a long time and large amplitude will cause fatigue damage of cable anchoring end, the vibration amplitude of the main beam structure will affect the comfort of vehicle driving. In order to control the vibration of cable, the usual methods include adding suitable damper to the structure, changing the surface form of cable by aerodynamics, adding auxiliary cable to the structure and so on. Although these methods can alleviate the vibration of cable to some extent, they also have many limitations. As a mature passive control technique, tuned mass dampers (TMDs) have been widely used in high-rise buildings and long-span bridges. At present, many famous high-rise structures in the world adopt multiple tuned mass dampers (MTMDs) as the structural design method to resist vibration. TMD has many significant advantages in suppressing cable vibration, for example, there is no need for external control equipment. The installation position is unrestricted, the installation is convenient, the maintenance cost is low, all of these are beneficial to the early application of TMD to the cable vibration resistance. At present, there are still some difficulties in the application of TMD to the cable, such as the parameter configuration basis of the specific structure form of TMD and so on. These are the problems to be solved urgently by engineers and technicians. In this context, the theoretical analysis of TMD, finite element simulation and experimental research has a strong engineering practical significance, this subject has done the following work on the basis of a large number of domestic and foreign related literature research. To understand the principle of TMD vibration absorption and the mathematical method to deduce the coupling vibration of cable TMD system. 2. By using finite element simulation method, several different TMD forms are designed, and their corresponding parameters are analyzed. The regular conclusion of TMD parameter and cable damping ratio is found by summarizing and analyzing the data. Provide guidance for the next test. Under the guidance of finite element simulation results, a kind of TMD model for experimental study is designed. With the help of the existing test equipment, the experimental research of a single TMD is completed, and the post-processing of the test data is carried out. The regular conclusion of TMD parameters and cable damping ratio is found. The results are in good agreement with the results of finite element analysis. The correctness of the finite element analysis method and the accuracy of the finite element analysis results are verified.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U441.3;U446.1

【參考文獻】

相關期刊論文 前2條

1 馬坤全;大跨徑斜拉橋建設與展望[J];國外橋梁;2000年04期

2 王均剛;馬汝建;趙東;林近山;;TMD振動控制結(jié)構(gòu)的發(fā)展及應用[J];濟南大學學報(自然科學版);2006年02期

，

本文編號：1796665