噪声与振动控制Issue(4)：52-55,4.DOI:10.3969/j.issn.1006-1335.2014.04.012
高速列车阻尼喷涂式铝型材减振降噪特性试验
Experiments on Vibration and Noise Reduction Effect of Sprayed-damping Section Aluminum Applied to High-speed Trains
摘要
Abstract
In order to clearly understand the effect of sprayed-damping on vibration and noise reduction of section aluminum floor of high-speed trains, a corrugated aluminum is used as the substrate and sprayed with 2 mm and 4 mm thick damping layers on it respectively. Then, the tests of the sound insulation, structural vibration and noise radiation are conducted in a laboratory. The test results show that as the thickness of the damping layer increases, the sound insulation effect increases, especially in the medium and high frequency range above 500 Hz. Sticking 2 mm thick damping layer on the corrugated aluminum floor can increase the weighted sound insulation by 4.5 dB compared with the corrugated aluminum floor without damping. When the thickness of the damping layer increases to 4 mm, the weighted sound insulation increases by 2.4 dB in comparison with 2 mm thick damping layer. In the range of 100 Hz~250 Hz, the 2 mm thick damping layer has negative effect on the reduction of vibration and noise radiation, but 4 mm thick damping layer has somewhat effect on noise and vibration reduction. In the frequency range from 315 Hz to 400 Hz, the damping layers of 2 mm and 4mm thicknesses have little sound insulation effect. When the frequency exceeds 500 Hz, with the increasing of the damping layer thickness, the vibration and noise radiation level of the section aluminum can be remarkably reduced, especially for the frequencies of 500 Hz, 1 250 Hz and 3 150 Hz.关键词
振动与波/减振降噪/铝型材/阻尼/隔声/振动声辐射Key words
vibration and wave/vibration and noise reduction/aluminum profile/damping/sound insulation/vibration and noise radiation分类
通用工业技术引用本文复制引用
王瑞乾,肖新标,刘佳,金学松..高速列车阻尼喷涂式铝型材减振降噪特性试验[J].噪声与振动控制,2014,(4):52-55,4.基金项目
国家863计划(2011AA11A103-2-2)；教育部创新团队(IRT1178) （2011AA11A103-2-2）
