| 基于BEM/FEM耦合技术的柴油机外声场模拟技术研究 |
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| 引用本文： | 冯慧华,左正兴,廖日东,马朝臣. 基于BEM/FEM耦合技术的柴油机外声场模拟技术研究[J]. 内燃机学报, 2004, 22(2): 155-161 |
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| 作者姓名： | 冯慧华 左正兴 廖日东 马朝臣 |
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| 作者单位： | 北京理工大学,机械与车辆工程学院,北京,100081 |
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| 基金项目： | 总装备部“十五”预研项目 ( 4 0 40 2 0 10 1.2 ) |
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| 摘 要： | 采用BEM／FEM耦合技术对某高强化V6柴油机结构的声辐射情况进行了模拟，得到了整机辐射声功率、辐射效率、主要部件对声学结果的贡献以及近、远场声压(级)、整机外场声强矢量分布等声学结果，为该柴油机针对减振降噪的结构声学优化提供了详细信息与重要参考。在此基础上，重点对主要声辐射部件一下曲轴箱的结构进行了修改，并对修改方案的声辐射情况进行了重计算。主要声学量的对比结果表明，在所研究的频率域内，修改措施对改善低频域内整机外场声辐射情况具有较为明显的作用。
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| 关 键 词： | BEM／FEM 耦合技术 柴油机 外声场模拟技术 结构声辐射 声学量 噪声控制 |
| 文章编号： | 1000-0909(2004)02-0155-07 |
| 修稿时间： | 2003-09-03 |
Outer Sound Field Simulation of a Diesel Engine Based on Coupled BEM/FEM Method |
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| FENG Hui-hua,ZUO Zheng-xing,LIAO Ri-dong,MA Chao-chen. Outer Sound Field Simulation of a Diesel Engine Based on Coupled BEM/FEM Method[J]. Transactions of Csice, 2004, 22(2): 155-161 |
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| Authors: | FENG Hui-hua ZUO Zheng-xing LIAO Ri-dong MA Chao-chen |
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| Abstract: | Sound field induced by structural vibration of a highly intensified V6 diesel engine was simulated with coupled BEM/FEM method. Acoustic parameters such as the whole engine's radiating acoustic power, radiation efficiency, contributions of main parts to acoustic results, near field and far field sound pressure level, as well as outer field sound intensity vectors were calculated. Under assistance of these results, structural acoustic optimization was conducted on of the diesel's structure, especially the lower crankcase. Results show that the modification could ameliorate the diesel engine's structural sound radiating condition in the studying frequency band. |
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| Keywords: | Diesel engine Structural acoustic radiation Structural acoustic optimization FEM BEM |
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