商用车驾驶室声腔声学模态试验与计算模态分析  

Experimental and Calculation Modal Analysis of Acoustic Cavity for Commercial Vehicle Cab

作　　者：曾祥坤[1,2] 喻菲菲[1] 

机构地区：[1]广东技术师范学院汽车学院,广东广州510665 [2]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《广东技术师范学院学报》2015年第2期26-30,共5页Journal of Guangdong Polytechnic Normal University

基　　金：国家自然科学基金资助项目(51305085)

摘　　要：阐述了声学模态有限元法的基本原理与声学模态的求解方法;以某商用车驾驶室内声腔为研究对象,介绍了声腔有限元简化模型的建模方法,以及多参考最小二乘复频域模态参数识别(Poly Max)方法的原理;论述了驾驶室内声腔声学模态试验的方法和步骤.结果显示,与试验模态频率相比,计算模态频率的误差率在6%以内,试验与计算的模态振型基本一致.这表明文中驾驶室声腔有限元简化模型的建模方法是准确的.This paper focused on the finite element modeling techniques and calculating methods of acoustic modal. An acoustic cavity of commercial vehicle cab was taken as studying example to demonstrate the proposed techniques and methods. The theory of poly-reference least-squares complex frequency-domain（Poly Max） method and the experimental modal analysis procedure of the acoustic cavity were presented in this paper. The error rates of frequencies between experimental and calculation modal analysis results were within 6%, and the calculation modals were agreed well with experimental data, which validated the proposed model of acoustic cavity.

关 键 词：声腔 声学模态 PolyMax 有限元 模态分析 

分 类 号：U461.4[机械工程—车辆工程] U461.1[交通运输工程—载运工具运用工程]