車輛與穩(wěn)定型懸索橋的耦合動力分析
發(fā)布時間：2018-08-21 07:04
【摘要】：穩(wěn)定型懸索橋是一種新型的懸索橋,該懸索橋在傳統(tǒng)懸索橋橋面下方增加了倒張拉系統(tǒng),一定程度上提高了橋梁的整體剛度,特別適用于中小跨度的橋梁。當車輛通過橋梁時將引起橋梁結(jié)構(gòu)的振動,而橋梁的振動又反過來影響車輛的振動,這種相互作用、相互影響的問題就是車輛與橋梁之間振動耦合的問題。車輛動力作用引起橋梁上部結(jié)構(gòu)的振動可能使結(jié)構(gòu)構(gòu)件產(chǎn)生疲勞,降低其強度和穩(wěn)定性；橋梁振動過大可能會對橋上車輛的運行安全和穩(wěn)定性產(chǎn)生影響,而對于中小型懸索橋,其加勁梁質(zhì)量與汽車等活荷載質(zhì)量比值較小,其變形及穩(wěn)定性較差,使車橋耦合振動問題更加突出。因此研究中小跨度的普通型懸索橋以及穩(wěn)定型懸索橋車橋耦合問題是非常有必要的。 本文以有限元數(shù)值模擬為基礎(chǔ),對穩(wěn)定型懸索橋車橋耦合振動問題進行研究。主要工作和成果如下： 1.總結(jié)和歸納了中外懸索橋的發(fā)展歷史及現(xiàn)狀,介紹了穩(wěn)定型懸索橋的原理和優(yōu)點,綜述了車橋耦合振動問題研究的歷史和方法。 2.闡述了懸索橋設(shè)計和計算的基本理論。應(yīng)用有限元理論與方法建立了懸索橋的兩種橋型(穩(wěn)定型懸索橋、普通型懸索橋)的成橋模型。利用通用有限元軟件對兩種橋模型進行非線性靜力分析,在懸索橋成橋狀態(tài)下設(shè)置了懸索橋主纜與倒纜的初應(yīng)變值,同時在模態(tài)分析中得到了懸索橋的前有限階固有頻率和相對應(yīng)的振型,為后面懸索橋車橋耦合分析做準備。 3.在車輛方面建立了兩種車輛模型：移動質(zhì)量車輛模型、四分之一彈簧質(zhì)量車輛模型,并對各個車輛模型在車橋耦合分析中建立了基本有限元理論。 4.運用通用有限元軟件,結(jié)合車橋耦合模型,具體編寫了車橋耦合APDL有限元計算程序。在兩種懸索橋模型上進行了不同車輛模型的動力非線性響應(yīng)計算,在結(jié)果中分析了不同車輛模型不同車速對車橋耦合振動的影響。同時對于穩(wěn)定型懸索橋過橋方式上選取單車單向行駛、雙車同向行駛與雙車異向行駛?cè)N行駛方式的計算。 5.對比分析了兩種懸索橋車橋耦合響應(yīng)計算結(jié)果。其結(jié)果表明穩(wěn)定型懸索橋明顯的提升了普通懸索橋的靜動力性能,降低了車橋耦合響應(yīng)。
[Abstract]:The stable suspension bridge is a new type of suspension bridge. The inverted tension system is added under the deck of the traditional suspension bridge, which improves the overall stiffness of the bridge to a certain extent and is especially suitable for the medium and small span bridges. When the vehicle passes through the bridge, it will cause the vibration of the bridge structure, and the vibration of the bridge will affect the vibration of the vehicle in turn. The interaction between the vehicle and the bridge is the problem of the vibration coupling between the vehicle and the bridge. The vibration of the superstructure may cause fatigue, reduce the strength and stability of the superstructure, and the excessive vibration of the bridge may have an effect on the safety and stability of the vehicle on the bridge, while for the small and medium-sized suspension bridge, the vibration of the bridge will affect the safety and stability of the vehicle on the bridge. The ratio of the mass of stiffened beam to the mass of moving load such as automobile is small, and its deformation and stability are poor, which makes the problem of vehicle-bridge coupling vibration more prominent. So it is necessary to study the vehicle-bridge coupling problem of medium and small span common suspension bridge and stable suspension bridge. Based on finite element numerical simulation, the coupled vibration of vehicle-bridge of stable suspension bridge is studied in this paper. The main work and results are as follows: 1. This paper summarizes the development history and present situation of Chinese and foreign suspension bridges, introduces the principles and advantages of stable suspension bridges, and summarizes the history and methods of research on vehicle-bridge coupling vibration. The basic theory of design and calculation of suspension bridge is expounded. Based on the finite element theory and method, the bridge models of two types of suspension bridge (stable suspension bridge and common suspension bridge) are established. The nonlinear static analysis of the two kinds of bridge models is carried out by using the universal finite element software. The initial strain values of the main cable and the inverted cable of the suspension bridge are set up under the condition of the bridge completion. At the same time, the pre-finite natural frequencies and corresponding modes of the suspension bridge are obtained in modal analysis, which provides the basis for the vehicle-bridge coupling analysis of the rear suspension bridge. 3. In the aspect of vehicle, two kinds of vehicle models are established: moving mass vehicle model, 1/4 spring mass vehicle model, and the basic finite element theory is established for each vehicle model in vehicle-bridge coupling analysis. 4. Using the general finite element software and the vehicle-bridge coupling model, the finite element calculation program of vehicle-bridge coupling APDL is compiled. The dynamic nonlinear responses of different vehicle models are calculated on two suspension bridge models. The effects of different vehicle models and different speeds on the vehicle-bridge coupling vibration are analyzed in the results. At the same time, the calculation of three kinds of driving modes of stable suspension bridge, that is, one way driving, two cars running in the same direction and two cars running in the opposite direction, is given. 5. The calculation results of vehicle-bridge coupling responses of two suspension bridges are compared and analyzed. The results show that the static and dynamic performance of the stable suspension bridge is obviously improved and the coupling response of the vehicle and bridge is reduced.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441.3
本文編號：2194913
[Abstract]:The stable suspension bridge is a new type of suspension bridge. The inverted tension system is added under the deck of the traditional suspension bridge, which improves the overall stiffness of the bridge to a certain extent and is especially suitable for the medium and small span bridges. When the vehicle passes through the bridge, it will cause the vibration of the bridge structure, and the vibration of the bridge will affect the vibration of the vehicle in turn. The interaction between the vehicle and the bridge is the problem of the vibration coupling between the vehicle and the bridge. The vibration of the superstructure may cause fatigue, reduce the strength and stability of the superstructure, and the excessive vibration of the bridge may have an effect on the safety and stability of the vehicle on the bridge, while for the small and medium-sized suspension bridge, the vibration of the bridge will affect the safety and stability of the vehicle on the bridge. The ratio of the mass of stiffened beam to the mass of moving load such as automobile is small, and its deformation and stability are poor, which makes the problem of vehicle-bridge coupling vibration more prominent. So it is necessary to study the vehicle-bridge coupling problem of medium and small span common suspension bridge and stable suspension bridge. Based on finite element numerical simulation, the coupled vibration of vehicle-bridge of stable suspension bridge is studied in this paper. The main work and results are as follows: 1. This paper summarizes the development history and present situation of Chinese and foreign suspension bridges, introduces the principles and advantages of stable suspension bridges, and summarizes the history and methods of research on vehicle-bridge coupling vibration. The basic theory of design and calculation of suspension bridge is expounded. Based on the finite element theory and method, the bridge models of two types of suspension bridge (stable suspension bridge and common suspension bridge) are established. The nonlinear static analysis of the two kinds of bridge models is carried out by using the universal finite element software. The initial strain values of the main cable and the inverted cable of the suspension bridge are set up under the condition of the bridge completion. At the same time, the pre-finite natural frequencies and corresponding modes of the suspension bridge are obtained in modal analysis, which provides the basis for the vehicle-bridge coupling analysis of the rear suspension bridge. 3. In the aspect of vehicle, two kinds of vehicle models are established: moving mass vehicle model, 1/4 spring mass vehicle model, and the basic finite element theory is established for each vehicle model in vehicle-bridge coupling analysis. 4. Using the general finite element software and the vehicle-bridge coupling model, the finite element calculation program of vehicle-bridge coupling APDL is compiled. The dynamic nonlinear responses of different vehicle models are calculated on two suspension bridge models. The effects of different vehicle models and different speeds on the vehicle-bridge coupling vibration are analyzed in the results. At the same time, the calculation of three kinds of driving modes of stable suspension bridge, that is, one way driving, two cars running in the same direction and two cars running in the opposite direction, is given. 5. The calculation results of vehicle-bridge coupling responses of two suspension bridges are compared and analyzed. The results show that the static and dynamic performance of the stable suspension bridge is obviously improved and the coupling response of the vehicle and bridge is reduced.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441.3
【參考文獻】
相關(guān)期刊論文 前10條
1 盛國剛,趙冰;移動振動系統(tǒng)作用下梁的動力分析[J];長沙交通學(xué)院學(xué)報;2002年02期
2 盛國剛,彭獻,李傳習(xí);車-橋耦合系統(tǒng)的動力特性分析[J];長沙交通學(xué)院學(xué)報;2003年04期
3 韓艷;夏禾;郭薇薇;;斜拉橋在地震與列車荷載同時作用下的動力響應(yīng)分析[J];工程力學(xué);2006年01期
4 王運金;桂水榮;陳水生;;連續(xù)梁橋車橋耦合振動分析的數(shù)值解法[J];華東交通大學(xué)學(xué)報;2007年04期
5 張軍,江克斌,胡業(yè)平;車橋耦合動力學(xué)系統(tǒng)模態(tài)綜合分析[J];解放軍理工大學(xué)學(xué)報(自然科學(xué)版);2003年01期
6 王彥明,王威強;任意有限個平行移動荷載作用下簡支梁絕對最大撓度的解析算法研究[J];計算力學(xué)學(xué)報;2004年03期
7 屈本寧;反張懸索橋簡介[J];空間結(jié)構(gòu);1999年02期
8 屈本寧;劉北辰;;索橋結(jié)構(gòu)的非線性有限元法[J];昆明工學(xué)院學(xué)報;1993年01期
9 程保榮,周玉勛;車橋耦合系統(tǒng)動力分析的模態(tài)綜合技術(shù)[J];清華大學(xué)學(xué)報(自然科學(xué)版);2002年08期
10 蔣通,馬超勇,張昕;彈性支承條件下車-橋體系的振動分析[J];力學(xué)季刊;2004年02期
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