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2006 年 10 月噪声与振动控制 5 第 5 期
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文章编号:1006 - 1355(2006) 05 - 0062 - 05 5
车内噪声预测与面板声学贡献度分析
惠巍,刘更,吴立言
(西北工业大学机电学院,西安 710072)
摘要:面板声学贡献度分析是汽车 NVH 特性研究的重要内容,识别各面板对车内场点的贡献度对于控制车
内噪声有着重要意义。利用有限元结合边界元的方法,建立三维车辆乘坐室声固耦合模型,使用 ANSYS 软件计算
出乘坐室在 20 - 200Hz 频率的声固耦合振动特性后,采用 LMS Virtual. lab 软件预测了驾驶员左、右耳的声压响应。
并通过各壁板对驾驶员右耳声压的面板贡献度分析,得出了各壁板对驾驶员右耳总声压的贡献度,为降低车内某
点噪声进行结构修改提供理论依据。通过对结构修改,有效降低了车内某点噪声。
关键2 词2 :声学;乘坐室;振动;有限元;边界元;面板声学贡献度;噪声控制
中图分类号: TB533 + . 2 ;U467. 4 + 93 文献标识码:A
Vehicle Noise Prediction and Panel Acoustic Contribution Analysis
HU I Wei , L IU Geng , W U L i yan
(School of Mechatronic Engineering , Northwestern Polytechnical University , Xi’an 710072 ,China)
Abstract :Panel acoustic contribution analysis ( PACA) is an advanced engineering tool to improve
the NV H quality of vehicle. A three dimensional sound structural coupling model of a vehicle is pre
sented in this paper by using the finite element method ( FEM) and the boundary element method
(BEM) to predict the interior acoustic field. Structural vibration responses of the vehicle puted
in a frequency range from 20 to 200Hz , and interior noise response of vehicle partment is
calculated by using direct BEM with LMS Virtual. lab software. The panel acoustic contribution analy
sis ( PACA) is done to determine the vehicle body panels o