考虑持续时间因素的铁路环境振动影响评价

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (10) : 207-211.

论文

考虑持续时间因素的铁路环境振动影响评价

马蒙1，刘维宁1，王文斌2，姜博龙1

作者信息 +

Evaluation of train-induced environmental vibrations considering the factor of exposure time

MA Meng 1 LIU Wei-ning 1 WANG Wen-bin 2 JIANG Bo-long 1

Author information +

文章历史 +

摘要

振动持续时间是影响人体健康和烦恼程度的重要因素，而国内现有环境振动评价指标不能区分不同列车振动的持续时间。为解决这一问题，提出了列车通过时暴露振级的概念和计算方法。暴露振级综合考虑了振动幅值、频率和持续时间三种因素，可以有效反映敏感目标接收到列车通过的振动能量。给出了确定暴露振级计算时间段的方法，并通过对三条客货混跑线路的环境振动测试，对比分析了地表暴露振级和最大Z振级的衰减。研究表明：（1）由于通过时间长，货运列车的暴露振级明显超过普通客运列车和时速120km/h的动车组；（2）采用暴露振级可以更有效地反映不同类型列车对人体影响的真实情况；（3）采用暴露振级可以更合理地确定环境振动防护距离。

Abstract

Vibration duration is an important factor to the influences of human health and annoyance. Existing vibration descriptor can not distinguish the vibration duration of different trains. In order to solve this problem, the concept of vibration exposure level (VEL) and its calculation method were presented. VEL can describe effectively the received vibration energy from the passage of trains at sensitive locations, as all three factors of vibration impact- amplification, frequency and exposure time – were considered. Then, the determine method of train pass-by time was suggested. Finally, the in-situ measurement was performed at three railway lines where both passage and freight trains run at the same tracks. The vibration attenuation of both VEL and maximum Z-vibration level were compared and analysed. Results show that: (1) due to the long pass-by time, VEL of freight trains were obviously larger than those of regular passage trains and bullet trains with the train speed of 120 km/h; (2) VEL can describe the vibration impact more effectively to human by different types of trains; (3) VEL can help determine the defective vibration distance effectively.

导出引用

马蒙1，刘维宁1，王文斌2，姜博龙1. 考虑持续时间因素的铁路环境振动影响评价[J]. 振动与冲击, 2016, 35(10): 207-211

MA Meng 1 LIU Wei-ning 1 WANG Wen-bin 2 JIANG Bo-long 1. Evaluation of train-induced environmental vibrations considering the factor of exposure time[J]. Journal of Vibration and Shock, 2016, 35(10): 207-211

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