| 交通荷载诱发振动传播规律和减振控制 |
| Traffic load induced vibration propagation law and vibration reduction control |
| 投稿时间：2018-12-05 修订日期：2018-12-17 |
| 中文关键词:环境振动 数值模拟 1/3倍频程 轻轨电车 |
| 英文关键词:Environmental vibration, numerical simulation, 1/3 octave, tram |
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| 中文摘要: |
| 为探究钢轨弹性包覆材料对减小轻轨电车诱发地面环境振动的效果,在采用适合的列车移动荷载模拟方法和合理设置模型参数后,运用ANSYS有限元分析软件建立不同工况下的轨道-地基土结构三维模型,分析在模拟环境下轻轨电车以30 km/h运行产生的环境振动,进行时域分析、竖向振级分析和1/3倍频程分析,并与实测数据进行对比。结果表明:关于列车移动荷载模拟方法,实测分析法获得的模拟数据更贴近实测值;在距轨道中心线8 m内双块式钢轨包覆材料的减振效果最好,当距离超过8 m后不同钢轨包覆材料的减振效果不明显;钢轨弹性包覆材料对于抑制低频环境振动有较好的效果,对于抑制高频振动效果较差,截面形状对于材料的减振性能有较大影响。 |
| 英文摘要: |
| In order to explore the effect of rail elastic coating material on reducing ground environmental vibration induced by trams, after adopting appropriate train moving load simulation method and reasonably setting model parameters, the three-dimensional model of rail-foundation soil structure under different working conditions is established by using ANSYS finite element analysis software, and the environmental vibration caused by trams running at 30K m / h under the simulated environment is analyzed, and time domain analysis, vertical vibration level analysis and 1 / 3 octave analysis are compared with the measured data. The results show that the simulation data obtained by the measured analysis method are closer to the measured values with respect to the train moving load simulation method. The damping effect of the double-block rail cladding material is the best within 8m from the center line of the track, and the damping effect of different rail cladding materials is not obvious when the distance exceeds 8m. The rail elastic coating material has a good effect on suppressing low-frequency environmental vibration and a poor effect on suppressing high-frequency vibration. In addition, its cross-sectional shape has a great influence on the damping performance of the material. |
| 袁金秀;叶茂;崔海龙;孙永杰;王悦;刘炳华;任珉;.交通荷载诱发振动传播规律和减振控制[J].石家庄铁道大学学报(自然科学版),2020,33(3):37-44. |
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