摘要
在进行车辆乘座室声固耦合振动有限元分析时 ,得到一反映吸声材料对声波吸收作用的复阻尼矩阵。本文从能量守恒原理出发 ,提出了将吸声材料的声抗率转化到声阻率中去的当量声阻率 ,这样既能简化计算 。
A complex damping matrix that contains specific acoustic impedance of sound absorbing materials is obtained while using finite element method to analyze the vibration coupling system of sound and vehicle cab structure. In this article an equivalent specific acoustic resistance of sound absorbing materials is proposed according to the energy conservation law. The results indicate that it will improve the computation accuracy and make the solving of finite element equation easier. When used to analyze interior noise of vehicle cab lined with sound absorbing materials on the panel.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2000年第2期19-21,共3页
Transactions of the Chinese Society for Agricultural Machinery
基金
机械工业部高校跨世纪优秀人材基金!资助项目 (项目编号 :962 5 0 40 2 )
关键词
吸声材料
车辆乘座室
当量声阻率
有限元
Sound absorbing materials, Specific acoustic impedance, Finite element
