【作者】 邓红梅；

【导师】 贺玉龙；

【作者基本信息】 西南交通大学 ， 环境工程， 2014， 硕士

【摘要】 轨道交通引起的环境振动问题越来越突出,已成为七大环境公害之一。国内外学者已在环境振动方面开展了大量的研究,并取得了丰富的研究成果,但这些研究成果还不能完全解决实际工程中的振动问题。本文在研究环境振动理论的基础上结合现场实测的方法对成灌快速铁路桥梁段引起的环境振动进行研究,以进一步了解其环境振动特性。首先对正线桥梁段三处测点地面的环境振动进行实测,分析各测点的振动变化规律并归纳出振动衰减公式,初步揭示成灌快速铁路桥梁段的环境振动特性。其次,运用本文归纳的衰减公式、铁计[2010]44号文中推荐的模式法预测公式、日本京都公害研究所提出的预测公式对成灌快速铁路桥梁段的环境振动进行预测,比较各预测公式计算出的预测值与实测值的相符度,依据符合度选出较适合成灌快速铁路桥梁段的环境振动预测公式。本文的主要研究结论如下：1.从各振动测试指标的变化趋势可知：随着距线路中心距离的增加,振级、振动加速度均在迅速减小,且在衰减过程中,近振源处的衰减速度大于远振源处的衰减速度。2.从1/3倍频程曲线、频谱曲线的变化趋势可知：近振源处高频占主导作用,远振源处低频占主导作用,高频部分的衰减速度大于低频部分的衰减速度；振动主频范围、最优频率、振动幅值均随距离的增加而逐渐减小。成灌快速铁路桥梁段环境振动的主要能量集中在10-63Hz之间。3.对比全福村Y型墩测点内外线的时程曲线和频谱曲线可知：列车速度的增加会引起环境振动的增加。4.环境振动衰减趋势分析结果表明,各测点环境振动基本以指数规律衰减。预测结果表明,本文衰减公式的符合度较好,铁计[2010]44号文中的模式预测公式符合度次之,日本京都公害研究所的符合度最低。因此,相比其他两种预测方法,本文归纳出的衰减公式最适合成灌快速铁路桥梁段的环境振动预测。更多还原

【Abstract】 Environmental vibration induced by the rail traffic has attracted considerable attention, which has become one of the seven environmental hazards. Many specialists home and abroad had done lots of researches and obtained abundant research result. However, the existing research results can not solve the problem of vibration generated by present rail system. The thesis mainly based on the environment vibration theory and combined in-situ test to measure the environment vibration induced by the Cheng-guan rapid railway. It can be helpful to understand the environmental vibration characteristics.First of all, In-situ tests have been conducted on the bridge of the main line and preliminary revealed the environmental vibration characteristic of Cheng-guan rapid railway. Secondly, using the equation proposed in the thesis, the formula presented by [2010] No.44and the recommended by Japan’s Kyoto institute of pollution prediction to forecast the environmental vibration of Cheng-guan rapid railway. Finally, the equation feasibility was certified by comparing and the best prediction equation was selected for the Cheng-guan rapid railway. The main results of the thesis are as follows:1. Form the variation of the various test data: the vibration level and the vibration acceleration are all decreased with the increase of the distance from the central line. The attenuation rapid near the vibration source is greater than that outside source.2. The high frequency near the vibration dominates the vibration relative to the far from outside through the analysis of the1/3octave of each measurement point curve. The main frequency range, optimal frequency and vibration amplitude are all decreased with the increase of the distance from the central line. The main vibration frequency is mainly between10-63Hz.3. The result shows that the increase of train rapid will lead to the increase of vibration strength according to the Time-history and Fourier curve in and outside of the third point of Quanfu countryside.4. It is suggested that the environmental vibration basically decreases with exponential through regression analysis. Result showed that the proposed equation quite adapted to the Cheng-guan rapid railway, followed by the [2010] No.44and the equitation recommended by Japan’s Kyoto institute of pollution. Therefore, the proposed equitation quite suit for the prediction to the Cheng-guan rapid railway compared to other two methods.更多还原