作　　者： (白伟）; (吕大立）;

机构地区： 天津大学内燃机研究所,天津300072

出　　处： 《小型内燃机与车辆技术》 2017年第4期72-76,共5页

摘　　要： 以简单扩张腔消声器为研究对象,分别采用试验测试、仿真分析和理论计算3种方法对比分析其传递损失,并利用声固耦合分析方法计算消声器的传递损失;对比结果发现,在高次波之前声固耦合方法更好描述消声器传递损失,在高次波之后声学分析能更好描述消声器传递损失,同时发现消声器的建模简化对传递损失计算结果有一定影响。通过两种计算方法相结合的方式,可以提高消声器声学性能的仿真精度,从而达到减小噪声控制风险和缩短项目开发周期,节约成本的目的。 The transmission loss of a simple expansion chamber muffler was analyzed by three methods of test simulation and theory, also by sound-structure-coupling simulation. The result shows that the coupling method is better before higher-order wave, acoustic method is better after higher-order wave, the simplified modeling has certain effect on the calculation results of transmission loss. Through the combination of two kinds of calculation method, which can improve the simulation accuracy of the acoustic performance of the muffler, the goal to reduce the noise control risk and shorten the project development cycle and saving the cost is achieved.

关 键 词： 传递损失 声固耦合 仿真精度 模态分析