基于逆边界元法的内燃机噪声源识别方法.pdf

文档介绍：第 41 卷第 5 期天津大学学报
2008 年 5 月 Journal of Tianjin University May 2008



基于逆边界元法的内燃机噪声源识别方法

舒歌群,陈达亮,梁兴雨,马维忍
(天津大学内燃机燃烧学国家重点实验室,天津 300072)

摘要:(IBEM)的噪声源识别技
术,利用边界元法建立了声场与结构表面振动速度之间的声学传递向量(ATV).将常规的声压测量作为输入数据,
在逆向数值计算方法的基础上能够精确地重构出结构表面法向振动速度,
轿车柴油机,测试了额定工况下近场 144 个场点声压,应用该方法在发火频率点处,重构出了柴油机表面法向振动速
,,对该柴油机各功
能部件的噪声贡献量进行了排序,
方法对复杂噪声源识别易于实施,具有更广的工程适应性.
关键词:内燃机;声源识别;逆边界元法;声学传递向量;振动速度重构
中图分类号:TK427 文献标志码:A 文章编号:0493-2137(2008)05-0563-06

Noise Sources Identification of bustion Engine
Using Inverse Boundary Element Method

SHU Ge-qun,CHEN Da-liang,LIANG Xing-yu,MA Wei-ren
(State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China)

Abstract:Noise source identification and ranking is the key step of noise control for an bustion
avoid the limits of traditional techniques,the inverse boundary element method(IBEM)was used to
accurately plex noise method can reconstruct the normal surface vibration velocity based
on near-field sound pressures and acoustic transfer vectors(ATVs)between the normal surface velocity and sound
field pressure calculated by the boundary element diesel engine was taken as an application
sound p