车内噪声的数值化分析与降噪设计  

Numerical Analysis and Design to Lower Vehicle Interior Noise

作　　者：杨杨[1] 陆森林[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《重庆理工大学学报（自然科学）》2016年第9期26-32,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：江苏省自然科学基金资助项目(BK2009212)

摘　　要：针对一般腔体结构的内部声场公式,利用有限元法得到声压响应幅度判定参数的计算公式。以某客车车身结构和声腔有限元模型为例,计算得到低频结构车身顶棚的声压响应幅度判定参数。为降低车身顶棚的声压响应幅度判定参数,提出车身顶棚的改进方案。利用声学软件计算改进前后的车身车内噪声,并分析驾驶员和前3排乘客场点处的声压级曲线。结果表明:通过计算顶棚声压响应幅度判定参数以降低车内噪声的方法是可行的。In view of the general formula for the internal sound field of a ruled structure,calculation formula for determinant parameter of sound pressure response level was derived using FEM（ finite element method）. Taking the structure and acoustic infinite model of a passenger car body as an example,the determinant parameter of the roof part in the low frequency body was calculated. In order to decrease the determinant parameter,an improvement program of the car body was provided.The interior noise of both the original body and the improved body was calculated using acoustic software. The sound pressure level curves for driver and passengers in first three rows were analyzed.It was confirmed that the solution to achieve interior noise reduction based on calculation of determinant parameter of sound pressure level of the roof part was feasible.

关 键 词：客车车身 声压响应幅度判定参数 有限元方法 声压级曲线 

分 类 号：U461[机械工程—车辆工程] TB532[交通运输工程—载运工具运用工程]