一种高效的发动机辐射噪声计算方法研究  

A fast and effective calculation method for engine radiated noise

作　　者：冯仁华[1] 刘敬平[1] 付建勤[1] 邓帮林[1] 张大鸣 

机构地区：[1]湖南大学先进动力总成研究中心,长沙410082 [2]美国加州州立大学弗雷斯诺分校,弗雷斯诺ca93726

出　　处：《振动与冲击》2014年第18期198-203,共6页Journal of Vibration and Shock

基　　金：国家高技术研究发展计划(863计划)(2012AA111801)

摘　　要：为了解决发动机辐射噪声计算的精度和效率问题,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。In order to solve the engine radiated noise problems accurately and efficiently, a Matlab program was developed here 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 the accuracy and efficiency of the boundary element method, the fast muhipole boundary element method and the Matlab program software. Results showed that for engine head cover and engine powertrain radiated sound power analysis problems, the comsumed time for the calculation with the Matlab program developed here is 1/123 or 1/108 of that with the fast multi-pole boundary element method, and 1/25 or 1/141 of that with the boundary element method, under the condition keeping a high calculation accuracy.

关 键 词：发动机 辐射噪声 计算方法 精度效率 

分 类 号：TK411.6[动力工程及工程热物理—动力机械及工程]