基于薄片有限元-无限元耦合模型的地铁列车振动环境影响分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (15) : 111-117.

论文

马龙祥1,2 ，刘维宁3，蒋雅君1,2，晏启祥1,2

作者信息 +

Analysis of metro train-induced vibration influence on surrounding environments based on sliced finite element-infinite element coupling model

MA Long-xiang 1,2，LIU Wei-ning 3，JIANG Ya-jun 1,2，YAN Qi-xiang1,2

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文章历史 +

摘要

鉴于地铁运营引发隧道及地层沿线路纵向的振动水平及特性不甚明确，应用薄片有限元-无限元耦合模型对地铁列车运营引发隧道基底、隧道壁及地表在垂直于线路的水平方向、铅垂方向及线路纵向三个方向上的振动响应进行高精度分析及比较。分析结果表明：①地铁列车运营引发横向、垂向及纵向三个方向6Hz以下的低频振动在地表均衰减得极其缓慢，且地表三个方向的振动速度、加速度响应具有相似的频率成分；②列车运营引起隧道壁的纵向振动响应在1~100Hz频段内较小，在该频段内的大部分频率点处，其响应甚至小于地表的纵向振动响应；③在隧道基底及隧道壁，由列车运营引发的纵向振动响应在1~100Hz频段以内显著小于由其引发的垂向振动响应，但在地表，由列车运营引发的纵向振动响应具有同横向、垂向响应相当的量值。

Abstract

Because the level and characteristic of the metro train-induced tunnel and ground vibration in the longitudinal direction along the subway line are not very clear, a comprehensive high accuracy analysis of the metro train-induced vibration response of the tunnel base, the tunnel wall and the ground surface in all three directions: the transverse direction perpendicular to the subway line, the vertical direction and the longitudinal direction along the subway line, are carried out through the sliced finite element-infinite element coupling model. The results show that: the attenuation of metro train-induced low frequency vibration below 6Hz on ground surface are very slow in all three directions, and the frequency components of ground surface vibration velocity and acceleration responses in three directions are similar; The train-induced longitudinal vibration response of the tunnel wall in frequency band 1~100Hz is small. At most frequencies in this band, its concrete values are even smaller than those of ground surface longitudinal vibration response; At the tunnel base and the tunnel wall, the train-induced vibration response in the longitudinal direction in frequency band 1~100Hz is significantly smaller than that in the vertical direction, but on the ground surface, the train-induced vibration response in the longitudinal direction has a comparative value with those in the transverse and vertical directions.

导出引用

马龙祥1,2,刘维宁3，蒋雅君1,2，晏启祥1,2. 基于薄片有限元-无限元耦合模型的地铁列车振动环境影响分析[J]. 振动与冲击, 2017, 36(15): 111-117

MA Long-xiang 1,2，LIU Wei-ning 3，JIANG Ya-jun 1,2，YAN Qi-xiang1,2. Analysis of metro train-induced vibration influence on surrounding environments based on sliced finite element-infinite element coupling model[J]. Journal of Vibration and Shock, 2017, 36(15): 111-117

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