轿车车内低频噪声的判定参数探讨  

An Investigation into the Determinant Parameter of Car Interior Low-frequency Noise

作　　者：高书娜[1,2] 邓兆祥[2] 

机构地区：[1]西南大学工程技术学院,重庆400716 [2]重庆大学,机械传动国家重点实验室,重庆400030

出　　处：《汽车工程》2013年第8期744-748,共5页Automotive Engineering

基　　金：国家863计划(2006AA110102);中央高校基本科研业务费专项资金(XDJK2012C006);西南大学博士基金(SWU111043)资助

摘　　要：首先针对含一个弹性面的刚性长方体简单耦合系统,运用有限元法分别计算决定其腔内声压响应的4个关键参数和声压响应幅度的判定参数,并与解析式直接计算的结果进行对比。结果表明,有限元法计算精度较高,与解析法计算结果吻合很好。然后分别利用判定参数和频率响应分析两种方法,计算某型轿车车内声压响应,发现两种计算结果趋势有较好的一致性,说明从简单耦合系统确定的声压响应幅度判定参数也适用于车内声压响应的分析,精度满足要求,可用于快速预测和控制车内噪声,为设计阶段的轿车车内低频噪声优化设计提供新思路。Firstly,aiming at a simple coupled system of rigid rectangular solid with an elastic plane,finite element method（FEM） is used to calculate both four key parameters determining the cavity sound pressure response of the simple coupled system and the determinant parameter for sound pressure response level of the system.The results show that FEM has a relatively high accuracy with a result well agree with that of analytic calculation.Then both determinant parameters and frequency response analysis are adopted to calculate the sound pressure response of interior noise in a car and it is found that both results have rather consistent trend,indicating that the determinant parameter for sound pressure response level derived from the simple coupled system also suits to the analysis of in-car sound pressure response with an accuracy meeting the requirements,and so can be used to quickly predict and control in-car noise,providing a new approach to the optimization design of interior low-frequency noise of a car at early design stage.

关 键 词：轿车 结构声腔耦合系统 振型耦合系数 频率重叠系数 声压响应幅度判定参数 

分 类 号：U467.493[机械工程—车辆工程]