发动机边盖透射与辐射噪声识别研究

贺岩松;;黄 勇;徐中明;;杨振冬;周 荣

振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 174-177.

PDF(1649 KB)
PDF(1649 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (22) : 174-177.
论文

发动机边盖透射与辐射噪声识别研究

  • 贺岩松1,2 ,黄 勇2 ,徐中明1,2 ,杨振冬3 ,周 荣3
作者信息 +

Research on identification of transmission and radiation noise of engine side cover

  • HE Yan-song1,2,HUANG Yong2,XU Zhong-ming1,2,YANG Zhen-dong3,ZHOU Rong3
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文章历史 +

摘要

以发动机边盖子声源为研究对象,采用实验与仿真分析相结合方法对结构噪声中透射噪声及
辐射噪声进行识别。对采集的发动机边盖声信号进行频谱谐波分析;并以采集的发动机边盖螺栓处加速度信号为激励计算频率响应;以振动频率响应为边界条件导入Vritual.Lab中,利用边界元方法计算辐射声功率;利用边盖结构-声耦合模型计算传声损失。结果表明:在0~800 Hz、2500~3000 Hz范围内主要以结构透射声为主;在800~2500 Hz范围内主要以结构辐射声为主。该方法可为噪声源识别提供新思路。

Abstract

This paper took the engine side cover as an example to study and identified the transmission noise and radiation noise by experiment and simulation analysis method. Firstly, sound signal of the engine side cover was collected by means of microphone arrays testing equipment, the signal spectrum was analyzed by harmonic analysis. The collected acceleration signal beside the bolt of engine side cover was taken as the excitation to calculate the frequency response of engine side cover. The surface vibration data of the engine side cover were imported to the software Virtual. Lab as the input loads of the boundary element model. The radiated surface acoustic power was calculated by boundary element method. The sound transmission loss was calculated by structural acoustic coupling model of the side cover. The results show that the noise between 20-8000Hz and 2500-3000Hz are mainly transmission noise, and 800-2500Hz is mainly radiation noise. This paper provides a new way for engine noise source identification.



关键词

声源识别 / 透射声 / 辐射声 / 隔声特性

Key words

noise source identification / transmission noise / radiation noise / sound isolation character

引用本文

导出引用
贺岩松;;黄 勇;徐中明;;杨振冬;周 荣. 发动机边盖透射与辐射噪声识别研究[J]. 振动与冲击, 2013, 32(22): 174-177
HE Yan-song;HUANG Yong;XU Zhong-ming;YANG Zhen-dong;ZHOU Rong. Research on identification of transmission and radiation noise of engine side cover[J]. Journal of Vibration and Shock, 2013, 32(22): 174-177

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