【摘要】：隨著我國(guó)經(jīng)濟(jì)的迅速發(fā)展,大跨度斜拉橋大量興建,其中斜拉索作為結(jié)構(gòu)的重要構(gòu)件,對(duì)橋梁安全起著至關(guān)重要的作用。現(xiàn)階段研究表明,拉索這種阻尼小、垂度大、剛度小的特殊結(jié)構(gòu),在外界荷載作用極易發(fā)生大幅度的振動(dòng)疲勞破壞,因此對(duì)斜拉索的減振研究顯得尤為重要。目前用于拉索被動(dòng)控制的方法有三種,包括空氣動(dòng)力學(xué)措施、構(gòu)造措施和機(jī)械阻尼措施,其中粘滯阻尼器應(yīng)用最為廣泛,但大量實(shí)踐表明:一般結(jié)構(gòu)形式的粘滯阻尼器通常安裝在斜拉索的端部,控制拉索的振動(dòng)位移較小,并且與橋面梁相連接,在外荷載的作用下極易發(fā)生共振現(xiàn)象,其減振效果遠(yuǎn)低于理論值。不受安裝位置影響的調(diào)諧質(zhì)量阻尼器(Tuned Mass Damper,TMD)則可以很好地克服一般機(jī)械阻尼器的上述缺點(diǎn),但普通結(jié)構(gòu)形式的調(diào)諧質(zhì)量阻尼器由于自身重力問題,導(dǎo)致其對(duì)拉索的控制效果并不是很理想。本文提出了一種用于橋梁拉索振動(dòng)控制的新型橢圓形薄壁結(jié)構(gòu)調(diào)諧質(zhì)量阻尼器。該阻尼器采用多個(gè)橢圓形薄壁結(jié)構(gòu)連接組成,具有結(jié)構(gòu)構(gòu)造簡(jiǎn)單、安裝方便、不需外部設(shè)備控制、維護(hù)成本低等優(yōu)點(diǎn),并且該裝置可以承擔(dān)自身重量,因此可以方便地用于大跨度橋梁斜拉索和系桿等構(gòu)件的振動(dòng)控制。本文研究?jī)?nèi)容包括以下幾個(gè)方面:(1)單個(gè)橢圓形薄壁結(jié)構(gòu)力學(xué)性能研究。利用有限元軟件,通過參數(shù)化建模,分析了單個(gè)橢圓形薄壁結(jié)構(gòu)采用不同設(shè)計(jì)參數(shù)時(shí)的力學(xué)性能,通過擬合有限元軟件得到的計(jì)算結(jié)果,建立單個(gè)橢圓形薄壁結(jié)構(gòu)簡(jiǎn)化力學(xué)模型,獲得最大屈服范圍與參數(shù)之間的關(guān)系,并分析了單個(gè)橢圓形薄壁結(jié)構(gòu)水平和豎向受力方向上的耦合作用。此外,利用能量法研究了單個(gè)橢圓形薄壁結(jié)構(gòu)力與變形關(guān)系的近似計(jì)算方法,并通過數(shù)值模擬驗(yàn)證了該方法的有效性。(2)整個(gè)調(diào)諧質(zhì)量阻尼器結(jié)構(gòu)力學(xué)性能研究。將多個(gè)橢圓形薄壁結(jié)構(gòu)進(jìn)行有機(jī)組合,形成了用于索振動(dòng)控制的調(diào)諧質(zhì)量阻尼器。通過各個(gè)橢圓形薄壁結(jié)構(gòu)空間幾何相互關(guān)系以及自身力與變形的力學(xué)性能,研究了整個(gè)阻尼器力與變形關(guān)系,建立了整個(gè)阻尼器力學(xué)模型,研究結(jié)果表明阻尼器在不同振動(dòng)方向上的力學(xué)性能變化不大,可以用于索多方向振動(dòng)控制(3)基于新型阻尼器的索振動(dòng)控制研究。本章分別從有限元模型和不考慮索抗彎剛度和垂度的簡(jiǎn)化模型,來研究本文提出的調(diào)諧質(zhì)量阻尼器的減振效果。使用ANSYS軟件建立橢圓薄壁結(jié)構(gòu)TMD—拉索模型,分析其減振效果;采用時(shí)程分析的方法,求解橢圓薄壁結(jié)構(gòu)TMD—拉索系統(tǒng)在隨機(jī)風(fēng)荷載作用下的減振效果;用適當(dāng)?shù)姆椒▽⒎蔷�性橢圓薄壁結(jié)TMD線性化,并驗(yàn)證其可行性。結(jié)果表明:在誤差可接受的范圍內(nèi),線性后與原非線性結(jié)構(gòu)相比,減振效果相當(dāng)。模擬結(jié)果顯示本文所設(shè)計(jì)的橢圓形薄壁結(jié)構(gòu)調(diào)諧質(zhì)量阻尼器對(duì)斜拉索具有很好的抑制效果。
[Abstract]:With the rapid development of economy in China, a large number of long-span cable-stayed bridges have been built. Cable-stayed cables, as an important component of the structure, play an important role in the safety of bridges. At present, the research shows that this special structure, which has small damping, large sag and small stiffness, is prone to a great deal of vibration fatigue failure under external load, so it is very important to study the vibration reduction of cable-stayed cables. At present, there are three methods for passive control of cables, including aerodynamic measures, structural measures and mechanical damping measures, among which viscous dampers are the most widely used. However, a lot of practice shows that the viscous damper of general structure is usually installed at the end of stay cable, and the vibration displacement of control cable is small, and connected with bridge deck beam, it is easy to occur resonance phenomenon under the action of external load. Its damping effect is much lower than the theoretical value. The tuned mass damper (Tuned Mass Damper,TMD), which is not affected by the installation position, can overcome the above shortcomings of the general mechanical damper, but the tuned mass damper of the ordinary structure is due to its own gravity problem. Leading to its control effect on the cable is not very ideal. A novel tuned mass damper for bridge cable vibration control is presented in this paper. The damper is composed of several elliptical thin-walled structures, which has the advantages of simple structure, convenient installation, no control of external equipment, low maintenance cost and so on. The device can bear its own weight, and the device has the advantages of simple structure, convenient installation, low maintenance cost and so on. Therefore, it can be used to control the vibration of stayed cables and tie members of long-span bridges. The main contents of this paper are as follows: (1) the mechanical properties of a single elliptical thin-walled structure are studied. By using the finite element software and parametric modeling, the mechanical properties of a single elliptical thin-walled structure with different design parameters are analyzed, and the calculated results are obtained by fitting the finite element software. A simplified mechanical model of a single elliptical thin-walled structure is established and the relationship between the maximum yield range and the parameters is obtained. The coupling between horizontal and vertical stress directions of a single elliptical thin-walled structure is analyzed. In addition, the energy method is used to study the approximate calculation method of the force-deformation relation of a single elliptical thin-walled structure, and the effectiveness of the method is verified by numerical simulation. (2) the mechanical properties of the whole tuned mass damper structure are studied. A tuned mass damper (TMD) for cable vibration control is formed by organically combining several elliptical thin-walled structures. In this paper, the relationship between force and deformation of the dampers is studied and the mechanical model of the dampers is established by means of the spatial geometric relationship of each elliptical thin-walled structure and the mechanical properties of the self-force and deformation. The results show that the mechanical properties of the damper vary little in different vibration directions and can be used in multi-direction vibration control of cable (3) the vibration control of cable based on the new damper. In this chapter, the damping effect of the tuned mass damper proposed in this paper is studied from the finite element model and the simplified model without considering the flexural stiffness and sag of the cable. The TMD- cable model of elliptical thin-walled structure is established by using ANSYS software, and its damping effect is analyzed, and the damping effect of TMD- cable system of elliptical thin-walled structure under random wind load is solved by time-history analysis method. The nonlinear elliptic thin wall junction (TMD) is linearized by a suitable method, and the feasibility of the linearization is verified. The results show that, in the acceptable range of error, the damping effect of linear post-structure is similar to that of the original nonlinear structure. The simulation results show that the tuned mass dampers of elliptical thin-walled structures designed in this paper have a good suppression effect on cable-stayed cables.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U441.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳飛;;大跨度斜拉橋斜拉索阻尼減振技術(shù)的應(yīng)用研究[J];黑龍江交通科技;2016年09期

2 杜曉慶;李俊軍;顧明;何平;;帶上水線拉索繞流場(chǎng)的大渦模擬研究[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年08期

3 郭鐵丁;康厚軍;王連華;趙躍宇;;工程索結(jié)構(gòu)動(dòng)力學(xué):非線性建模與分析[J];力學(xué)與實(shí)踐;2016年02期

4 康厚軍;郭鐵丁;趙躍宇;;大跨度斜拉橋非線性振動(dòng)模型與理論研究進(jìn)展[J];力學(xué)學(xué)報(bào);2016年03期

5 梁棟;宋吉祥;王晶雨;;TMD抑制斜拉索振動(dòng)的機(jī)理研究[J];河北工業(yè)大學(xué)學(xué)報(bào);2015年02期

6 周海俊;楊夏;;輔助索接地的簡(jiǎn)化索網(wǎng)-阻尼器系統(tǒng)的阻尼和頻率[J];西南交通大學(xué)學(xué)報(bào);2014年06期

7 文永奎;盧文良;;分布式TMD對(duì)斜拉橋抖振減振的參數(shù)優(yōu)化及分析[J];土木工程學(xué)報(bào);2014年06期

8 丁美林;李憲生;張群;;關(guān)于斜拉橋斜拉索減振阻尼器的應(yīng)用技術(shù)研究[J];科技信息;2013年19期

9 杜曉慶;張燁;顧明;;臨界雷諾數(shù)下帶人工水線斜拉索氣動(dòng)性能研究[J];振動(dòng)與沖擊;2013年09期

10 羅帥;劉紅軍;王剛;;斜拉索-調(diào)諧質(zhì)量阻尼器系統(tǒng)復(fù)模態(tài)分析[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2012年06期

相關(guān)會(huì)議論文 前1條

1 何永龍;孫利民;周亞剛;;利用阻尼型輔助索的斜拉索減振試驗(yàn)研究[A];第18屆全國(guó)結(jié)構(gòu)工程學(xué)術(shù)會(huì)議論文集第Ⅱ冊(cè)[C];2009年

相關(guān)碩士學(xué)位論文 前4條

1 高銘尚;風(fēng)荷載作用下輸電塔結(jié)構(gòu)MATLAB、ANSYS聯(lián)合主動(dòng)控制數(shù)值模擬研究[D];西安建筑科技大學(xué);2016年

2 李紫碩;調(diào)諧質(zhì)量阻尼器在拉索減振中的試驗(yàn)研究[D];河北工業(yè)大學(xué);2015年

3 張胤;基于TMD的斜拉索多模態(tài)振動(dòng)控制研究[D];哈爾濱工業(yè)大學(xué);2012年

4 李升玉;大跨斜拉橋主梁風(fēng)振響應(yīng)及TMD減振設(shè)計(jì)方法研究[D];南京工業(yè)大學(xué);2006年

，

本文編號(hào)：2455939