噪声与振动控制Issue(z1)：362-366,5.DOI:10.3969/j.issn.1006-1335.2013.S1.089
减载式V型声屏障隔声性能及降噪效果研究
An Study on the Sound Insulation Performance and Noise Reduction Effect of V-type Deloading Noise Barriers
摘要
Abstract
The V-shaped sound barrier has attracted a lot of attention because it can reduce the wind loads of a high speed train, while the sound insulation performance has to be ensured in the meantime. To evaluate the performance of the V-shaped noise barrier, this paper measured the sound insulation of a V-shaped sound barrier in the lab, and compared to that of a vertical sound barrier. A prediction model of the sound barrier is also developed, with which the sound reduction of the V-shaped and the vertical sound barriers are calculated with the field sound spatial property identified in filed, The results show that the weighted sound insulation of the V-shaped noise barrier is 23.8 dB lower than that of the vertical one, which shows the sound insulation performance is poor. However, the results based on the high-speed trains’source intensity distribution show that the V-shaped sound barrier can effectively reduce the exterior noise of the high-speed train. The sound reduction of the V-shaped sound barrier is only 1 dB(A) lower than the vertical barrier. For the source of wheel-rail, the reduction of the V-shaped noise is 4 dB(A) lower than the vertical barrier. This means that during deloading the V-shaped sound barrier’s noise reduction effect is good.关键词
声学/噪声/声屏障/隔声测试/预测/降噪效果Key words
acoustics/noise/noise barriers/sound insulation testing/prediction/noise reduction effect分类
交通工程引用本文复制引用
周强,何宾,温泽峰,屈磊,肖新标,金学松..减载式V型声屏障隔声性能及降噪效果研究[J].噪声与振动控制,2013,(z1):362-366,5.基金项目
2012博士创新基金A0920502051214）；国家863计划(2011AA11A103-2-2)；教育部创新团队(IRT1178) （2011AA11A103-2-2）
