摘要
以降低车内低频结构噪声为目标,优化车身板件.采用子结构模态综合的方法建立结构动力学模型,并以其在实车工况下的振动响应作为声学边界元模型的边界条件,以车内驾驶员右耳位置为目标响应点,结合计算得到的声传递向量,对汽车车身进行板件声学贡献分析.通过计算得到车身各板件对车内噪声的声学贡献,分析出影响比较显著的关键面板,根据分析结果对车身相应板件进行振动抑制.经试验验证,怠速工况下,车内噪声在频率为20～100 Hz范围内的声压级水平得到比较明显的改善,主要峰值频率最大降幅5.70 dB,整体噪声水平下降了3.89 dB.结果表明:板件贡献分析方法可以为控制车内低频噪声提供合理的建议.
The vehicle body panels were optimized to reduce in-car structural noise at low frequency.By the method of substructure mode synthesis,the structural dynamic model was set up with the boundary condition of operational vibration response for acoustic boundary element model（BEM）.According to acoustic transfer vector（ATV） results,the driver-right-ear position was selected as acoustic response point to analyze acoustic contribution of vehicle body panels.Based on the panel contribution analysis,the key panels to in-car noise were located to restrain the vibration of these crucial panels.At idle speed,the experimental validation indicates that the acoustic level of in-car noise is markedly improved with the main peaks decrease of 5.70 dB and in-car noise overall level decrease of 3.89 dB.In-car structural noise can be controlled by the methed of panel contribution analysis.
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2012年第1期25-29,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家高技术研究发展计划项目(2007AA11A107)
关键词
板件声学贡献
子结构模态综合
声传递向量
声学贡献
噪声控制
振动控制
panel acoustic contribution
substructure mode synthesis
acoustic transfer vector
acoustic contribution
noise control
vibration control
作者简介
王二兵（1985-），男，河南焦作人，博士研究生（wangerbing@gmail．com）．主要从事振动噪声控制、疲劳耐久等汽车试验学研究．
周鋐（1952-），男，上海人，教授，博士生导师（zhoohong@tongji.edu.cn）主要从事疲劳耐久,振动噪声控制等汽车试验学研究．
