| 阻尼钢轨的降噪性能试验 |
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| 引用本文： | 曾钦娥,刘林芽,尹学军.阻尼钢轨的降噪性能试验[J].声学技术,2012,31(1):98-101. |
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| 作者姓名： | 曾钦娥 刘林芽 尹学军 |
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| 作者单位： | 1. 华东交通大学,南昌,330013
2. 隔而固减振技术有限公司,山东青岛,266101 |
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| 基金项目： | 国家自然科学基金项目（51068007）; 教育部新世纪优秀人才支持计划（NECT-09-0167）资助 |
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| 摘 要： | 为研究阻尼钢轨的降噪性能,以标准钢轨和阻尼钢轨为研究对象,采用半消声室法进行室内声试验。通过对比试验,得出了标准钢轨和阻尼钢轨的时域、自功率谱和1/3倍频程曲线图。试验结果表明:阻尼钢轨产生的声压级幅值随时间迅速降低,并且在很短的时间内衰减完毕,衰减时间为标准钢轨的1/16;阻尼钢轨在1250 Hz以下频段范围内降噪效果不明显,在1250 Hz以上频段范围内,阻尼钢轨消耗了大部分能量,总噪声级有很大的降低,降噪效果显著。
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| 关 键 词： | 阻尼钢轨 降噪性能 半消声室法 噪声级 |
| 收稿时间： | 2011/4/13 0:00:00 |
| 修稿时间： | 2011/5/30 0:00:00 |
Experimental research on noise reduction performance of damping rails |
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| ZENG Qin-e,LIU Lin-ya and YIN Xue-jun.Experimental research on noise reduction performance of damping rails[J].Technical Acoustics,2012,31(1):98-101. |
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| Authors: | ZENG Qin-e LIU Lin-ya and YIN Xue-jun |
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| Affiliation: | 1.East China jiaotong university,Nanchang 330013,China;2.Separated and solid Vibration Technology Co.,Ltd,Qingdao 266101,Shandong,China) |
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| Abstract: | In order to research the noise performance of damping rail,a standard rail and a damping rail are taken as the research targets,and the experiment are carried out in the semi-anechoic room.Then the relationship between the standard and damping rails are analyzed,the time-domain and frequency spectrum analysis and the 1/3 octave curve of the standard and damping rails are obtained.The experimental results show that the sound pressure level of the damping rail reduces rapidly over time and dissipates in a very short time,just the 1/16 for the standard rail;Under 1250 Hz,the effect of noise reduction of the damping rail is not apparent;Above 1250Hz,the damping rail consumes most noise energy,and total noise level is greatly reduced;The noise reduction effect of labyrinth constrained damping rail is quite distinct. |
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| Keywords: | damped rails noise performance semi-dead room method noise level |
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