铝合金地铁车内噪声预测与控制技术研究  

Interior Noise Prediction and Reduction Technology in Aluminum Alloy Subway Vehicle

作　　者：廖连莹[1,2] 左言言[1] 陈冬冬[1] 

机构地区：[1]江苏大学振动噪声研究所,镇江212013 [2]常州工学院机电工程学院,常州213002

出　　处：《机械设计与制造》2012年第11期22-24,共3页Machinery Design & Manufacture

基　　金：江苏省自然科学基金(BK2009212);高等学校博士学科点专项基金(20103227110009)

摘　　要：地铁车体的低噪声设计对降低车内低频噪声具有重要意义。为获得车体的最优结构设计,分别建立了铝合金地铁的车体有限元模型和声固耦合模型。选择车身与转向架的连接点作为激励点,对（20~200）Hz频域内的车内声场进行了仿真预测,得到了声场观测平面的声压分布及声场观测点的声压级频谱。结果表明,在145Hz、195Hz等频率处出现了较大峰值,通过对峰值频率处的声学贡献度分析,找到了贡献度最大的面板区域。最后,根据贡献度分析结果对车顶和地板的局部结构进行了修改,使得145Hz和195Hz处的声压分别下降了9.41dB（A）和8.75dB（A）。Low-noise design of the subway vehicle body is very important for reducing interior low frequency noise.In order to obtain the optimal NVH design,finite element model and acoustic-structural coupled model of the subway vehicle body are set up.The interior sound field in the frequency range of（20~200）Hz is predicted by selecting the connection point between vehicle body and bogie as the incentive points.Then distribution of sound pressure and the spectrum of sound pressure level are obtained.The results show that there exist peaks at the 145Hz and 195Hz.The panel acoustic contribution analysis（PACA） in the frequency range of 145Hz to 195Hz is carried out to obtain the panels which have most influence on the acoustic response of vehicle body.Finally,structural modification is performed to the most contributing structural area,and the noise level at 145Hz and 195Hz is reduced obviously.

关 键 词：噪声预测 噪声控制 声学贡献度 铝合金地铁 

分 类 号：TH16[机械工程—机械制造及自动化] U270.16[机械工程—车辆工程]