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利用声学仿真软件Virtual.Lab对单扩张腔和并联多腔消声器做了仿真分析,同时应用数学工具计算得到了单扩张腔在平面波理论下的传递损失。将单扩张腔的仿真结果与理论传递损失作了对比,分析了高阶模态波的传播对于消声器声学性能的影响;又进一步对比了多腔并联消声器与单扩张腔的声学性能。
The acoustic simulation software Virtual.Lab is used to simulate the single expansion chamber and parallel multi-chamber silencer. At the same time, the transmission loss of single expansion chamber under plane wave theory is calculated by using mathematical tools. The simulation results of the single expansion cavity are compared with the theoretical transmission loss. The influence of the propagation of the high-order mode wave on the acoustic performance of the muffler is analyzed. The acoustic performance of the multi-cavity parallel muffler and the single expansion cavity is further contrasted.