林好利;陈传举;
河南科技大学车辆与动力工程学院
摘要：本文是针对不同结构常用摩托车抗性消声器做了有限元分析。在保持其它结构参数不变的情况下,分析了单节扩张腔消声器扩张腔的长度、直径以及进出口插入管对其声学性能的影响。首先建立单节扩张腔消声器的数学模型,然后采用有限元法对所建立的Helmholz方程进行求解。结果表明,插入管可以有效的改善单节扩张腔存在通过频率的缺点,且当进口插入管长度为l/2,出口插入管长度为l/4时消声量达到最大。分析结果为在短时间内选出最佳的消声器结构及相应的最佳尺寸参数提供了依据,而不必做大量的消声器加工和试验测试工作。
关键词： 摩托车;;抗性消声器;;Helmholz方程;;有限元法
Abstract: Finite element analysis is
applied to analyze different structures of motorcycle reactive muffler.effects
of different length and diameter of the expansion chambers,different extensions
of inlet and outlet tubes of a single expansion chamber muffler have been
studied.First,the mathematic model of the single expansion chamber muffler has
been built,and then the Finite Element Method is applied to solve the Helmholz
equation.The results show that extensions of inlet and outlet tubes can improve
the disadvantages effectively of the passing frequency of the single expansion
chamber mufflers.It also shows that the transmission loss reaches the maximum
when the extension of inlet tube is l/2 and the outlet tube is l/4.It provides
a foundation for selecting optimal muffler structures and corresponding optimal
dimension parameters in a short time without a great deal of muffler machining
and experiments test.
Keywords:Motorcycle;Reactive Muffler;Helmholz
Equation;Finite Element Method
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