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季节冻土区冬季列车行驶路基振动反应研究

, PP. 34-40

Keywords: 季节冻土,加速度反应,加速度振级,列车振动,现场监测

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Abstract:

为了研究季节冻土区行驶列车引起的含冻土层铁路路基的振动反应特性,在大庆地区季节冻土场地进行了冬季现场试验.试验结果表明列车行驶产生的路基振动加速度在近轨处具有周期性变化的特征,随着监测点距轨道距离的增大,其周期特性逐渐减弱并消失;季节冻土层的存在对路基竖向振动具有放大作用;列车行驶引起的路基振动加速度随与铁轨距离的增加而减小,并以竖向振动衰减最快;列车行驶过程中会引起环境振动问题,随着距铁轨距离的增大,垂向加速度振级呈递减趋势,时速越小则降幅越大,货车由于轴重大,衰减幅度低于普通客车.

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