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The Experimental Study and Finite Element Analysis of Single Chamber Muffler with Perforated tube
finite element method
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The intake and exhaust system of automotive is one of main sources of environmental noise, the most effective way to control intake and exhaust noise is using muffler in intake and exhaust system. The production process of resistance is simple, low cost, and the resistance muffler has better silencer performance. The resistance muffler has an important application in the area of muffler. Designing a resistance muffler with high silencer performance has become an important issue on intake and exhaust noise control. Poor silencing effect of certain frequencies can be obtained by the transmission loss curve. Low-frequency is not smooth, perforated tube can be installed inside of the muffler perforations to improve. This way can improve the defect frequency, and can be modified for specific frequency. Numerical simulations are presented in perforated tube muffler using the finite element method, and compared with experimental results from transfer function. To calculate the transmission loss, discuss the advantages and disadvantages. The Sullivan and Crocker formula is applied to the model by imposing impedance boundary condition. We use FEAST acoustic finite element software developed by Professor Wu to perform the numerical simulation analysis and to obtain the transmission loss of the perforated tube muffler.
|Appears in Collections:||機械工程學系所|
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