噪声与振动控制Issue(3)：37-40,66,5.DOI:10.3969/j.issn.1006-1335.2015.03.009
基于MATV的高速列车车体铝型材振动声辐射预测
Sound Radiation Prediction of Section Aluminum for High-speed Trains Based on MATV Method
摘要
Abstract
The sound radiation characteristics of section aluminum of high-speed trains were analyzed under a white noise excitation using a sound radiation prediction modal based on the modal acoustic transfer vector (MATV) method. The effects of damping loss factor and inclination angle of the interior reinforcing ribs of the section aluminum on the sound radiation properties were analyzed. It is found that for the currently used section aluminum structure in high-speed train bodies, its sound radiation efficiency increases with frequency increasing and finally approaches 1. The sound radiation efficiency increases linearly for the frequencies below 240 Hz, and fluctuates above 240 Hz. Increasing damping loss factor can result in a decrease of the noise radiated from the section aluminum structure. When the damping loss factor increases from 0 to 1%, the overall sound power level drastically reduces by nearly 33.5 dB. When the damping loss factor increases from 3%to 7%, the overall sound power level decreases slowly and almost linearly. It is also found that, the smaller the inclination angle of the interior reinforce ribs is, the lower the sound radiation efficiency is. The overall sound power level reduces by nearly 27.9 dB when the inclination angle changes from 60° to 30°.关键词
振动与波/高速列车/铝型材/声辐射/阻尼损耗因子Key words
vibration and wave/high-speed train/section aluminum/sound radiation/damping loss factor分类
数理科学引用本文复制引用
姚丹,伏蓉,肖新标,周强,王衡禹,圣小珍..基于MATV的高速列车车体铝型材振动声辐射预测[J].噪声与振动控制,2015,(3):37-40,66,5.基金项目
国家自然科学基金(51475390，U1434201)；国家863计划(2011AA11A103-2-2,2011AA11A103-4-2) （51475390，U1434201）
