噪声与振动控制Issue(4)：39-43,5.DOI:10.3969/j.issn.1006-1335.2014.04.009
高速列车夹芯地板结构隔声特性研究
Sound Transmission Loss of Sandwich Panels Floor of High-speed Trains
摘要
Abstract
The model for analyzing the acoustic characteristics of interior floor of high-speed trains is established. The sandwich panels with three different materials, timber, aluminum and steel, and the honeycomb cores with different thicknesses and densities, are used for the interior floor. The transfer matrix method is employed for analyzing the model. The sound insulation effects of different materials and structures of the sandwich panels are evaluated and compared. The results show that (1) when the thickness of the surface layer of the sandwich panel keeps constant, the interior floor with steel as the surface layer has the best sound transmission loss effect, and followed by aluminum, and timber;(2) when the thickness of the surface layer is additionally increased by 1 mm, the transmission loss of the floor can be increased by 1 dB~1.5 dB for timber sandwich panel, 1 dB ~3 dB for aluminum sandwich panel and 1 dB ~5 dB for steel sandwich panel respectively;(3) the density of the honeycomb core has only a little influence on the transmission loss of the interior floor. When the density is reduced by a half, the sound transmission of the floor has a little tendency of increase.关键词
声学/隔声/高速列车/隔音垫/传递矩阵法Key words
acoustics/transmission loss/high speed train/sound insulating pad/transfer matrix method分类
数理科学引用本文复制引用
孙加平,张丽荣,孙海荣,王志海,王永成..高速列车夹芯地板结构隔声特性研究[J].噪声与振动控制,2014,(4):39-43,5.基金项目
最高运营速度380 km/h高速动车组研制 （）
