噪声与振动控制Issue(6)：46-50,5.DOI:10.3969/j.issn.1006-1335.2014.06.011
高速列车铝型材外地板减振降噪特性分析研究
On Vibration and Sound Transmission Loss of External Floor of High-speed Trains
摘要
Abstract
Based on statistical energy analysis (SEA) method and VA One software for sound and vibration analysis, the model for acoustic simulation and prediction of aluminum-extrusion external floor of high-speed trains is established. The influence of the thickness of the constraint damping layer on the transmission loss and sound radiation coefficient of the floor is calculated and analyzed. The average sound insulation and weighted sound insulation of the floor structure are evaluated. The results show that changing the thickness of the constraint damping layer only has a little influence on the vibration and noise reduction of the floor in the low frequency range; but it has a large influence on that in the high frequency range. When the thickness reaches a certain value, further increase of the thickness of the damping layer can raise the noise radiation intensity of the aluminum-extrusion floor. Both the average sound insulation and the weighted sound insulation will increase with the increasing of the thickness of the constraint damping layer, but the weighted sound insulation is larger than the average sound insulation.关键词
声学/高速列车/铝型材外地板/统计能量分析/约束阻尼层/隔声量Key words
acoustics/high-speed train/aluminum alloy extrusion/SEA/constrained damping layer/sound transmission loss分类
交通工程引用本文复制引用
张媛媛,沈火明..高速列车铝型材外地板减振降噪特性分析研究[J].噪声与振动控制,2014,(6):46-50,5.基金项目
牵引动力国家重点实验室开放课题资助（tb1305）；新疆水利水电重点科学基金资助项目(xjzdxk-2010-02-12) （xjzdxk-2010-02-12）
