不同轨道结构地铁车内噪声影响特性分析 |
| |
引用本文: | 农兴中,魏晓,陈明明,赵才友,史海欧. 不同轨道结构地铁车内噪声影响特性分析[J]. 铁道标准设计通讯, 2019, 0(4): 22-27 |
| |
作者姓名: | 农兴中 魏晓 陈明明 赵才友 史海欧 |
| |
作者单位: | 广州地铁设计研究院有限公司;西南交通大学高速铁路线路工程教育部重点实验室;西南交通大学土木工程学院 |
| |
摘 要: | 为研究不同轨道结构形式对地铁车内噪声的影响,测试了列车通过普通整体道床、减振扣件道床、梯形轨枕道床、中档钢弹簧浮置板道床、高档钢弹簧浮置板道床等5种轨道结构形式时的车内噪声。采用A计权声压级对车内噪声时域与频域特性进行分析,探究列车通过5种不同轨道结构时车内噪声分布规律。结果表明:普通整体道床车内噪声瞬时A计权声压级均值为76. 6 d B,减振扣件为82. 3 d B,梯形轨枕道床为77. 2 d B,中档钢弹簧浮置板道床为76. 8 d B,高档钢弹簧浮置板道床为81. 6 d B; 5种轨道结构形式车内噪声A计权声压级频谱差异明显;车内噪声总A计权声压级在空间分布上,同一水平车厢两侧近门窗处比车厢中部约高1. 5 d B,在垂向上声压级随高度的增加逐渐减小,坐高处比站高处噪声总A计权声压级高0. 5 d B。
|
关 键 词: | 地铁列车 车内噪声 A计权 时域特性 频域特性 分布规律 |
Analysis of Noise Characteristics of Metro Vehicle on Different Track Structures |
| |
Affiliation: | ,Guangzhou Underground Railway Design Research Institute,Key Laboratory of High-speed Railway Engineering,Ministry of Education,Southwest Jiaotong University,School of Civil Engineering,Southwest Jiaotong University |
| |
Abstract: | In order to study the influence of different track structures on interior noise of the metro vehicle,tests are conducted on the train passing through such five track structures as monolithic roadbed,damper fastener track,ladder track,mid-range steel spring floating slab and high-grade steel spring floating slab. The A-weighted sound pressure level is used to analyze the time and frequency characteristics and find out thedistribution law of the interior noise of the metro vehicle when the train is running on the five track structures. Research results show that the average sound pressure level of instantaneous A-weighted in the monolithic roadbed is 76. 7 dB,the damper fastener track is 82. 2 dB,the ladder track is 77 dB,the mid-range steel spring floating slab is 77 dB,and the high-grade steel spring floating slab is 81. 6 dB; the five track structures have significant differences in the sound pressure level spectrum of the A-weighted interior noise; the spatial distribution of the sound pressure level of total A-weighted noise inside the vehicle shows that the noise at the two ends and near the door and window is about 1. 5 dB higher than that at the middle of the vehicle with the same level; in the vertical direction,it decreases with increase of the height; and the total noise A-weighted sound pressure at the sitting height is 0. 5 d B higher than that at the standing height. |
| |
Keywords: | Metro train Vehicle interior noise A weighting Time domain characteristics Frequency domain characteristics Distribution law |
本文献已被 CNKI 等数据库收录! |
|