| 轨面不平顺对高架支承块轨道结构振动特性影响试验研究 |
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| 引用本文： | 韦红亮,练松良,周宇.轨面不平顺对高架支承块轨道结构振动特性影响试验研究[J].中国铁道科学,2011,32(6). |
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| 作者姓名： | 韦红亮 练松良 周宇 |
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| 作者单位： | 同济大学道路与交通工程教育部重点实验室,上海,201804 |
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| 基金项目： | 国家自然科学基金资助项目，铁路环境振动与噪声教育部工程研究中心开放基金，高等学校博士学科点专项科研基金资助项目 |
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| 摘 要： | 针对轨面不平顺对高架支承块轨道结构振动特性的影响进行现场试验,分别从时域和频域对比分析不同轨面不平顺状态下轨道结构的振动响应,重点考虑10～1 000 Hz频率范围内的振动.分析结果表明:轮轨冲击力和轨道结构振动加速度幅值随轨面不平顺幅值的增加而增大,同时也受到轨面不平顺类型和波长分布的影响；轨面不平顺引起的钢轨振动频率主要分布在50～1 000 Hz的范围内,承轨台、桥面板垂向振动频率分布在40～200 Hz的范围内,轨面不平顺的波长分布是影响轨道结构振动频率分布特性的主要因素之一；降低谐波型轨面不平顺幅值0.2mm,可以减小钢轨垂向振动水平14.1dB.建议将轨面不平顺谱加入轨道质量的评价指标中.
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| 关 键 词： | 城市轨道交通 轨面不平顺 支承块轨道 振动加速度 1/3倍频程频谱 |
Experimental Study on the Influence of Rail Surface Irregularity on the Vibration Characteristics of Elevated Block-Supported Track |
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| WEI Hongliang,LIAN Songliang,ZHOU Yu.Experimental Study on the Influence of Rail Surface Irregularity on the Vibration Characteristics of Elevated Block-Supported Track[J].China Railway Science,2011,32(6). |
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| Authors: | WEI Hongliang LIAN Songliang ZHOU Yu |
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| Institution: | WEI Hongliang,LIAN Songliang,ZHOU Yu(Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China) |
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| Abstract: | In view of the influence of rail surface irregularity on the vibration characteristics of block-supported track in elevated system,field test was carried out and the vibration responses of track structure induced by different rail surface irregularities were comparatively analyzed in time and frequency domain respectively with emphasis on the vibration range of 10~1 000 Hz.The analysis results show that wheel/rail impact forces and vibration acceleration amplitude of track structure increase with the increm... |
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| Keywords: | Urban rail transit Rail surface irregularity Block-supported track Vibration acceleration 1/3 octave spectrum |
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