一种高效的发动机辐射噪声计算方法研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (18) : 198-203.

论文

一种高效的发动机辐射噪声计算方法研究

冯仁华 1 ，张大鸣 2，邓帮林 1，刘敬平 1，付建勤1

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A fast and high accuracy calculation method for engine radiated noise

Feng Renhua 1 Zhang Daming 2 Deng Banglin 1 Liu Jingping 1 Fu Jianqin 1

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摘要

为了解决发动机辐射噪声计算的精度和效率问题，本文基于表面速度振动原理，利用Matlab程序，开发了一种高效的发动机辐射噪声声功率模拟计算软件。分别用边界元法、快速多级边界元法和Matlab程序软件对比分析了普通平板、发动机缸盖罩和发动机动力总成辐射声功率的计算精度和效率，结果显示，在保证高的计算精度情况下，用Matlab程序软件计算发动机缸盖罩辐射声功率的效率是边界元法的25倍，是快速多级边界元法的123倍；用Matlab程序软件计算发动机动力总成辐射声功率的效率是边界元法的141倍，是快速多级边界元法的108倍。

Abstract

In order to solve the engine radiated noise problems accurately and efficiently, a Matlab program was developed in this paper based on the surface vibration velocity method to calculate the radiated sound power. Several numerical examples including simple plate, engine head cover and engine powertrain were used to compare accuracy and efficiency among boundary element method, fast multipole boundary element method and the Matlab program software. Results show that for the engine head cover and engine powertrain radiated sound power analysis problems, the Matlab program developed in this paper could reduce the calculation time to 1/123 or 1/108 comparing to fast multipole boundary element method, and 1/25 or 1/141 comparing to boundary element method, while keeping the high calculation accuracy.

关键词

发动机 / 辐射噪声 / 计算方法 / 精度效率

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冯仁华 ;张大鸣;邓帮林;刘敬平;付建勤. 一种高效的发动机辐射噪声计算方法研究[J]. 振动与冲击, 2014, 33(18): 198-203

Feng Renhua Zhang Daming Deng Banglin Liu Jingping Fu Jianqin . A fast and high accuracy calculation method for engine radiated noise[J]. Journal of Vibration and Shock, 2014, 33(18): 198-203