摘要
基于有限元理论,运用声学分析软件Sysnoise仿真分析扩张式消声器内部有、无气流存在时的声压分布特性和速度分布特性。结果表明:消声器在低频时,声波以一维平面波传播;在高频时,则以高次谐波形式传播;气流对消声器内部声压、速度分布有较大的影响。
This article, based on the finite element theory, simulatively analyses the non -air current existence sound pressure distribution characteristic and the velocity distribution characteristic of expansion type silencer interior using acoustics analysis software Sysnoise . The result indicates that when silencer is in low frequency, sound wave travels by unidimen- sional plane wave. When in high frequency, travels by higher harmonic form dissemination. The air current has the tremen- dous influence on the silencer interior sound pressure and the velocity distribution .
出处
《内燃机》
2007年第2期39-41,共3页
Internal Combustion Engines
基金
云南省教育厅基金项目(6Y0143D)
关键词
有限元法
SYSNOISE
声压分布
速度分布
finite element method
sysnoise
sound pressure distribution
velocity distribution
