柴油机油底壳振动与噪声辐射仿真分析与优化

张凯成; 李舜酩; 孙明杰; 姚通

doi:10.3969/j.issn.1001-2222.2018.05.010

车用发动机 >

2018 , Vol. 0 >Issue 5: 54 - 60

DOI: https://doi.org/10.3969/j.issn.1001-2222.2018.05.010

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柴油机油底壳振动与噪声辐射仿真分析与优化

张凯成 ,
李舜酩 ,
孙明杰 ,
姚通

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南京航空航天大学能源与动力学院，江苏南京 210016）

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Simulation Analysis and Optimization for Vibration and Noise-Radiation of Diesel Engine Oil Sump

ZHANG Kaicheng ,
LI Shunming ,
SUN Mingjie ,
YAO Tong

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(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

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摘要

对4缸柴油机油底壳的振动与噪声进行预测，并给出了多种结构优化方案进行降噪研究。在三维设计软件Creo中简化油底壳模型，导入有限元软件HyperMesh和AnsysWorkbench建立有限元模型，分析了油底壳在正常工作情况下的模态特性和瞬态响应特性。利用瞬态响应结果计算得到了油底壳声功率值。根据计算结果给出了3种不同的降噪方案，仿真结果表明3种优化方案均满足降噪的要求。

关键词： 柴油机; 油底壳; 模态分析; 瞬态响应; 辐射噪声; 间接边界元法

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张凯成 , 李舜酩 , 孙明杰 , 姚通 . 柴油机油底壳振动与噪声辐射仿真分析与优化[J]. 车用发动机, 2018 , 0(5) : 54 -60 . DOI: 10.3969/j.issn.1001-2222.2018.05.010

Abstract

The vibration and noise of oil sump for a fourcylinder diesel engine were predicted and a variety of structural optimization schemes were proposed to study the noise reduction. The sump model was simplified in the 3D design software Creo and was then imported into the finite element software HyperMesh and AnsysWorkbench to establish the finite element model. The modal characteristics and transient response characteristics of oil sump under normal working conditions were further analyzed. According to the result of transient response, the sound power value was acquired. In the end, three kinds of schemes for noise reduction were put forward and verified. The simulation shows that all the three optimization schemes meet the requirements of noise reduction.

Key words： diesel engine; oil sump; modal analysis; transient response; radiated noise; indirect boundary element method

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