道床竖向不平顺对地铁环境振动源强特性影响分析
万壮胡传
Track Bed Vertical Irregularity Influence on Characteristics of Metro Environmental Vibration Source Intensity
WAN ZhuangHU Chuan
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作者信息:成都地铁运营有限公司，610081，成都
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Affiliation:Chengdu Metro Operation Co., Ltd., 610081, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.01.027
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中图分类号/CLCN:U211.3
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栏目/Col:研究报告
摘要:
为探究道床竖向不平顺对于振动源强的影响，利用多体系统动力学分析方法模拟车轨耦合动力学，并采用有限元方法建立柔性体模型。通过模拟柔性钢轨上不同不平顺幅值和不平顺波长的余弦函数获得道床竖向不平顺，提取并分析道床板和隧道壁等位置的振动源强数据。研究表明：隧道壁垂向加速度的频域峰值主要集中于100 Hz以内的低频区域；道床上浮对于振动源强的影响较为明显，其中道床伸缩缝位于上浮中心处的工况对道床板垂向加速度的影响最大。
Abstracts:
To explore the influence of track bed vertical irregularity on vibration source intensity, multi-body system dynamics analysis method is applied to simulate vehicle-track coupling dynamics, and finite element method is adopted to establish flexible body model. The track bed vertical irregularity is obtained by simulating the cosine function of the different irregularity amplitudes and irregularity wavelengths on flexible rail. The vibration source intensity data of positions such as track bed slab and tunnel wall are extracted and analyzed. Research shows that the peak value of tunnel wall vertical acceleration mainly concentrates in the region of low-frequency within 100 Hz, and track bed rising has relatively evident influence on vibration source intensity, in which the working condition of track bed expansion joint at the slab rising center is the most influential.
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