利用计算机仿真技术进行汽车声学特性分析.pdf

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第 6 卷第 2 期江南大学学报(自然科学版) Vol. 6 No. 2

2007 年 4 月 Journal of Southern Yangtze University( Natural Science Edition) Apr. 2007
文章编号:1671 - 7147 (2007) 02 - 0197 - 03
利用计算机仿真技术进行汽车声学特性分析
李在伟
(浙江财经学院信息学院, 浙江杭州 310012)
摘要: 运用 CA E 技术对一卡车乘员室进行模态和噪声分析,发现声压响应峰值所对应的频率,
使后期的结构优化更有针对性. 具体计算声压响应时,首先应用有限元法计算车身结构在路面激
励下的频率响应,然后将计算所得的结构壁板速度响应作为内部声腔的边界条件,并采用边界元
法计算了乘员室内驾驶员耳部的声压响应.
关键词: 声学响应分析; 有限元法; 边界元法
中图分类号: TP 391. 9 文献标识码: A
Acoustic Analysis of Auto Body Using CAE Method
L I Zai wei
(School of Information puter Science , Zhejing University of Finance & Economics , Hangzhou 310012 ,
China)
Abstract :Recently , comfort has e an important target for every pany.
Designers are seeking t he precise and time saving met hod to perform t he automotive NV H
analysis. The numerical met hod is getting more attention because of it s merit s of cost s and time
saving. In t his st udy , the model and acoustic analyses are performed on a truck body using CA E
met hod. In details , as to t he acoustic analysis , to get t he dynamic behavior of t he auto body
struct ure , a frequency response function of t he body struct ure is calculated by using FEM. The
p ressure response of t he interior acoustic domain is solved by boundary element met hod (B EM) .
The result s can be used for struct ural optimization.
Key words : acoustic response analysis