调查各种弹性轨道铺设的城市高架铁路运输系统发出的噪音
Quanmin Liu1, Kui Gao1, Yifei Miao1
1Engineering Research Center of Railway Environmental Vibration and Noise of Ministry of Education, East China Jiaotong University, Nanchang 330013, China.
Materials (Basel, Switzerland)
|March 13, 2025
概括
这项研究开发了一种用于城市高架铁路交通的噪音预测模型,发现不同的轨道形状显著改变了噪音辐射. 钢弹浮板轨道和梯形卧轨道有效减少桥梁传输噪音和轨道板噪音.
科学领域:
- 声学 声学 在声学上
- 土木工程 土木工程是指土木工程.
- 机械工程 机械工程
背景情况:
- 城市高架铁路运输系统产生大量的噪音污染,影响周围环境.
- 了解车辆-轨道-桥梁相互作用对于预测和减轻噪声至关重要.
- 现有的噪声预测模型可能无法完全捕捉各种轨道形式的复杂性.
研究的目的:
- 开发和验证一个全面的噪音预测模型,用于城市高架铁路运输.
- 为了研究不同轨道形状的噪声辐射特性,包括弹性紧固件,梯形卧床和钢弹浮板.
- 量化各种轨道形式对桥载和辐射噪声的降噪效果.
主要方法:
- 开发了一种使用动态接收方法的车辆-轨道-桥梁交互模型.
- 整合了有限元素方法-边界元素方法 (FEM-BEM) 与统计能源分析 (SEA) 进行噪声预测.
- 分析了不同轨道配置的主要梁,轨道板和车轮轨道系统的噪声辐射.
主要成果:
- 开发的噪声预测模型与测量数据显示出很好的一致性.
- 钢弹浮板轨道 (FST) 和梯形卧轨道 (TST) 显著降低了桥梁带来的噪音 (分别为24.6dB和8.8dB).
- 在减少轨道板噪声的同时,一些减振轨道略微增加了车轮轨道噪声.
结论:
- 城市高架铁路运输的噪音预测模型是有效的.
- 轨道形状的多样性显著影响噪声辐射场.
- FST和TST提供了显著的降噪效益,特别是在桥梁和轨道板噪声方面.
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