本文關(guān)鍵詞： 超大跨度斜拉橋 脈動(dòng)風(fēng)場(chǎng) 軌道不平順 風(fēng)-車-橋耦合振動(dòng) 動(dòng)力響應(yīng)　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：摘要：超大跨度斜拉橋作為與懸索橋最具競(jìng)爭(zhēng)力的橋型,在千米級(jí)跨徑上越來越受到工程界的青睞,但是隨著結(jié)構(gòu)的創(chuàng)新和跨徑的增大,各種不確定性因素也顯著增加。本文以國(guó)家自然科學(xué)基金項(xiàng)目“強(qiáng)風(fēng)環(huán)境下高速鐵路車-橋系統(tǒng)氣動(dòng)特性和抗傾覆性能風(fēng)洞試驗(yàn)研究(51178471)”內(nèi)容為主線,以主跨1092m滬通鐵路長(zhǎng)江大橋?yàn)楣こ瘫尘?完成了風(fēng)荷載作用下的大跨度斜拉橋與列車的耦合振動(dòng)計(jì)算分析,主要工作及成果有： 1.綜述了大跨度斜拉橋的發(fā)展歷程,討論了國(guó)內(nèi)外鐵路橋梁動(dòng)力問題及列車走行性的研究進(jìn)展,闡述了超大跨度斜拉橋風(fēng)-車-橋耦合振動(dòng)研究的必要性。 2.針對(duì)超大跨度斜拉橋的結(jié)構(gòu)特點(diǎn),以滬通鐵路長(zhǎng)江大橋?yàn)楣こ瘫尘?建立了風(fēng)-車-橋時(shí)變系統(tǒng)空間振動(dòng)精細(xì)化仿真模型。 3.對(duì)無風(fēng)狀況下的多線行車方案進(jìn)行計(jì)算與分析,結(jié)果表明：列車運(yùn)行時(shí),主梁跨中最大橫、豎向動(dòng)位移滿足剛度要求,各行車方案均具有良好的動(dòng)力特性及列車走行性。 4.對(duì)強(qiáng)風(fēng)作用下的耦合系統(tǒng)進(jìn)行計(jì)算與分析,得出了滿足列車運(yùn)行管制規(guī)程要求的風(fēng)速-車速關(guān)系曲線,為超大跨度斜拉橋的運(yùn)營(yíng)管制提供了理論依據(jù)。
[Abstract]:Absrtact: as the most competitive bridge type with suspension bridge, super-span cable-stayed bridge is more and more popular in engineering circles, but with the innovation of structure and the increase of span. In this paper, the wind tunnel test study on aerodynamic characteristics and capsize resistance of high-speed railway vehicle-bridge system under strong wind environment is carried out with the National Natural Science Foundation of China (NSFC). "content is the main line. Taking the main span 1092m Shanghai-Tongtong Railway Yangtze River Bridge as the engineering background, the coupled vibration calculation and analysis of the long-span cable-stayed bridge and the train under the action of wind load are completed. The main work and results are as follows: 1. The development history of long-span cable-stayed bridge is summarized, and the research progress of railway bridge dynamic problem and train running property at home and abroad is discussed. The necessity of wind-vehicle-bridge coupling vibration of long span cable-stayed bridge is expounded. 2. In view of the structural characteristics of the super-long-span cable-stayed bridge, a fine simulation model of spatial vibration of time-varying wind-vehicle-bridge system is established with the Yangtze River Bridge on the Shanghai-Tongtong Railway as the engineering background. 3. The calculation and analysis of the multi-line train scheme under the condition of no wind shows that the maximum transverse and vertical dynamic displacement of the main beam meets the stiffness requirement when the train is running. Each train plan has good dynamic characteristics and train running performance. 4. The coupling system under the action of strong wind is calculated and analyzed, and the relationship curve between wind speed and speed is obtained to meet the requirements of train operation regulation, which provides a theoretical basis for the operation control of long-span cable-stayed bridges.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441.3;U448.27

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本文編號(hào)：1473708