基于多平面波源的气动阀用消声器传递损失分析  

Analysis of Transmission Loss for Pneumatic Valve-used Mufflers Based on Plane Wave Multi-sound-Sources

作　　者：石虎山[1] 赵升吨[1] 范淑琴[1] 申亚京[1] 

机构地区：[1]西安交通大学机械工程学院

出　　处：《液压气动与密封》2008年第4期71-74,共4页Hydraulics Pneumatics & Seals

基　　金：高等学校全国优秀博士学位论文作者专项资金资助项目(199930)

摘　　要：传统计算消声器传递损失的方法是基于单一平面波声源采用四端参数来进行计算的,这种方法不能很好地反映实际消声器对具有分布声源的降噪性能,因此,本文提出了基于多平面波声源,按声源点分解消声器的方法求解传递损失,同时在MATLAB中进行了仿真,其结果表明了用多声源法要比单一声源法所求得消声器的传递损失既能反映出消声器对分布声源的降噪性能,又更能逼近实际消声器的消声性能。与单一声源法和文献[6]之计算方法比较,其最大相对误差达20%左右。Traditionally, the transmission loss of valve-used mufflers is calculated by means of the four-parameters based on the single plane wave sound source, which can not reflect the de-noise performance of muffler in case of distribution sound sources. The method for computing transmission loss by resolving muffler based on the plane wave multi-sound-sources is proposed. And then the simulation is performed in MATLAB environment. The calculation results show that the proposed method, as is opposite to the method for computing transmission loss using the single sound source, can represent the de-noise effect of muffler on the distribution sound sources and approximate the reducing noise performance of the actual muffler. The maximum relative error between the analytical result in the proposed method and those in the single sound source method and the calculation in lecture [6] is 20%.

关 键 词：消声器 平面波 声源 流体噪声 气动阀 

分 类 号：TB53[理学—物理]