Experimental Study and Design of the Exhaust Muffler for Vehicle

By the experimental study of noise loss, this paper analyzes the noise frequency characters through the muffler and identified and the bad noise not have been restrained by muffler. The elemental model of the muffler is made. With ANSYS, the acoustic field of the muffler is analyzed and the noise frequency characters of muffler are gotten. Based on the data of the experiments and numerical analysis, the parameters of structure and shape are gotten through the theory of fastness noise elimination. A new type acoustic impendence muffler is designed. The performance of the new designed muffler is validated by the experiments. The result indicates that the amount of noise elimination increase 3～5 dB.