本文關(guān)鍵詞： 高速鐵路 橋梁 成渝客運專線 環(huán)境振動 衰減特性　出處：《西南交通大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,各個國家積極發(fā)展與完善高速鐵路,與此同時,高速鐵路運營誘發(fā)的環(huán)境振動的問題也愈發(fā)突出,目前國內(nèi)外雖然開展了很多相關(guān)的科研工作,但是還需要更全面更深入的研究。在這個背景下,本論文在查閱大量國內(nèi)外關(guān)于高速鐵路環(huán)境振動的文獻(xiàn),對高速鐵路的環(huán)境振動開展理論分析的基礎(chǔ)上,根據(jù)成渝客運專線橋梁段列車高速運行時誘發(fā)的地面環(huán)境振動的實測數(shù)據(jù)結(jié)果,分析探討高速鐵路橋梁段列車通行時誘發(fā)的環(huán)境振動的衰減特性和規(guī)律,并采用統(tǒng)計學(xué)的回歸分析方法得出成渝客運專線橋梁段的環(huán)境振動隨距離衰減的經(jīng)驗公式。最后,使用已有的預(yù)測模型,得出環(huán)境振動強度隨距離的衰減趨勢,并對預(yù)測數(shù)據(jù)的衰減曲線與實測數(shù)據(jù)的衰減曲線進行對比分析,驗證預(yù)測公式的適用性,討論得出最適合成渝客運專線橋梁段環(huán)境振動的預(yù)測公式。本文的主要研究結(jié)論如下:(1)成渝客運專線橋梁段列車以300 km/h左右的行駛速度高速通過時,隨著到振源距離的加大,最大Z振級VLZmax表現(xiàn)出波動性衰減的趨勢,且最大Z振級VLZmax在到振源距離為32.5 m的范圍內(nèi)衰減的幅度比較大,整體衰減了 15.6 dB,32.5m后衰減速度減慢。(2)根據(jù)擬合曲線可以得知成渝客運專線高速列車通過橋梁區(qū)段時,地面環(huán)境振動的強度隨到振源的距離的增加而慢慢衰減,且各測試點環(huán)境振動最大Z振級VLZmax與到振源的對數(shù)距離基本上呈線性關(guān)系。(3)運用"鐵計[2010]44號文"中所給出的模式預(yù)測法和日本的京都公害研究所針對高架結(jié)構(gòu)的環(huán)境振動預(yù)測的經(jīng)驗公式,分別預(yù)測成渝客運專線橋梁段的環(huán)境振動的衰減情況,得出的預(yù)測數(shù)據(jù)與實測數(shù)據(jù)存在一定的差異。與其他兩個公式相比,本論文擬合出的衰減公式得出的預(yù)測數(shù)據(jù)與實測數(shù)據(jù)最接近,而且預(yù)測數(shù)據(jù)曲線與實測數(shù)據(jù)曲線的衰減趨勢基本一致,因此最適合成渝客運專線同等條件下橋梁段的環(huán)境振動預(yù)測。
[Abstract]:In recent years, various countries have actively developed and improved high-speed railways. At the same time, the problems of environmental vibration induced by high-speed railway operation have become increasingly prominent. At present, although a lot of related scientific research work has been carried out at home and abroad, But there is still a need for more comprehensive and in-depth research. Under this background, this paper is based on the theoretical analysis of the environmental vibration of high-speed railway by consulting a large number of literature on environmental vibration of high-speed railway at home and abroad. Based on the measured data of ground environmental vibration induced by high speed train running in bridge section of Chengdu-Chongqing passenger dedicated line, the attenuation characteristics and law of environmental vibration induced by train in bridge section of high-speed railway are analyzed and discussed. The empirical formula of environmental vibration attenuation with distance of Chengdu-Chongqing passenger dedicated Line is obtained by using statistical regression analysis method. Finally, using the existing prediction model, the attenuation trend of environmental vibration intensity with distance is obtained. The attenuation curve of the predicted data is compared with the attenuation curve of the measured data, and the applicability of the prediction formula is verified. The prediction formula for the environmental vibration of the bridge section of Chengdu-Chongqing passenger dedicated line is discussed. The main conclusions of this paper are as follows: 1) when the train of the bridge section of Chengdu-Chongqing passenger dedicated line passes at a high speed of about 300 km/h, with the increase of the distance to the vibration source, The maximum Z-level VLZmax shows the trend of fluctuation attenuation, and the maximum Z-level VLZmax has a large attenuation amplitude in the range of 32.5 m from the source to the vibration source. When the high-speed train of Chengdu-Chongqing passenger dedicated line passes through the bridge section, the intensity of ground environment vibration slowly decreases with the increase of the distance to the vibration source, according to the fitting curve, when the high-speed train passes through the bridge section, the intensity of the ground environment vibration decreases slowly with the increase of the distance to the vibration source. Moreover, the logarithmic distance between the maximum Z vibration level VLZmax and the vibration source of each test point is basically linear.) the model prediction method given in "Iron Meter [2010] 44" and the Kyoto Institute of Environmental hazards in Japan are used to solve the problem of elevated structure. Empirical formula for environmental vibration prediction, The attenuation of the environmental vibration of the bridge section of Chengdu-Chongqing passenger dedicated line is predicted respectively, and the predicted data are different from the measured data, and compared with the other two formulas, The predicted data obtained from the attenuation formula fitted in this paper are the closest to the measured data, and the attenuation trend of the predicted data curve is basically consistent with that of the measured data curve. Therefore, it is most suitable for the environmental vibration prediction of the bridge section under the same conditions of Chengdu-Chongqing passenger dedicated line.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U441.3;U211.3

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