本文關(guān)鍵詞： 高速鐵路 振動 結(jié)構(gòu)噪聲 低頻噪聲 仿真計算　出處：《中國鐵道科學(xué)研究院》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：自1964年日本建成世界上第一條高速鐵路起,世界高速鐵路的發(fā)展經(jīng)歷了三次高潮,以日本、法國、意大利、德國等最具代表性。我國高速鐵路建設(shè)起步較晚,但是起點高,發(fā)展迅速,并且具備獨立自主的高速鐵路技術(shù),迎來了我國高速鐵路建設(shè)的高峰期。伴隨著高速鐵路的發(fā)展,高鐵橋梁結(jié)構(gòu)的振動和噪聲問題也受到社會越來越多的關(guān)注。 本文對比分析了國內(nèi)外低頻噪聲的限值和評價標(biāo)準(zhǔn),為我國完善高速鐵路振動、低頻噪聲評價標(biāo)準(zhǔn)提供科學(xué)的理論依據(jù)和參考意見。目前針對橋梁結(jié)構(gòu)低頻噪聲的研究較少,文章致力于輻射噪聲的理論分析和數(shù)值計算。本文所使用的聲輻射邊界元法包含時域、頻域兩種分析方法,對橋梁結(jié)構(gòu)輻射噪聲邊值問題的研究具有極大優(yōu)勢。 本文基于有限元—邊界元理論,以典型的高速鐵路32m簡支箱梁為模型,考慮了移動荷載列模型和移動質(zhì)量模型兩種簡化的荷載模型。首先分析對比了橋梁結(jié)構(gòu)的振動特性和輻射噪聲特性,繼而進(jìn)行了橋梁振動、聲場噪聲的時程分析和頻譜分析,最終總結(jié)了振動和噪聲的傳播、衰減規(guī)律,以及兩者之間的關(guān)系。其中,橋梁結(jié)構(gòu)振動的計算采用了通用有限元軟件ANSYS的動力分析模塊,而輻射噪聲采用聲學(xué)仿真軟件Virtual.Lab Acoustics的瞬態(tài)邊界元模塊來計算。本文通過改變橋梁、車輛參數(shù)來研究其對振動和輻射噪聲的影響程度,為指導(dǎo)工程實踐進(jìn)行減振降噪提供了理論依據(jù)。
[Abstract]:Since 1964, when Japan completed the world's first high-speed railway, the development of the world's high-speed railway has experienced three climaxes, to Japan, France, Italy. Germany and other most representative. China's high-speed railway construction started late, but the starting point is high, rapid development, and have independent high-speed railway technology. With the development of high-speed railway, the vibration and noise of high-speed railway bridge have been paid more and more attention by the society. In this paper, the limits and evaluation criteria of low frequency noise at home and abroad are compared and analyzed to improve the vibration of high-speed railway in China. The evaluation standard of low-frequency noise provides scientific theoretical basis and reference opinion. At present, there are few researches on low-frequency noise of bridge structure. This paper is devoted to the theoretical analysis and numerical calculation of radiated noise. The acoustic radiation boundary element method used in this paper includes two analytical methods in time domain and frequency domain. The study of radiated noise boundary value problem of bridge structure has a great advantage. Based on the finite-boundary element theory, this paper takes the typical high-speed railway 32 m simply supported box girder as the model. Two simplified load models, moving load sequence model and moving mass model, are considered. Firstly, the vibration characteristics and radiated noise characteristics of bridge structure are analyzed and compared, and then bridge vibration is carried out. Time history analysis and spectrum analysis of sound field noise, and finally summarized the propagation of vibration and noise, attenuation law, and the relationship between the two. The dynamic analysis module of general finite element software ANSYS is used to calculate the vibration of bridge structure. The radiated noise is calculated by the transient boundary element module of the acoustic simulation software Virtual.Lab Acoustics. The influence of vehicle parameters on vibration and radiated noise is studied, which provides a theoretical basis for engineering practice to reduce vibration and noise.
【學(xué)位授予單位】：中國鐵道科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U441.3

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本文編號：1479073