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김상원(Sangwon Kim),신규철(Guchoel Shin),최정송(Jungsong Choi),백춘호(Chunho Beak),전필근(Pilgeun Jeon),이지훈(Jihoon Lee) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
The exhaust system of the vehicle has an influence on driver`s feeling directly and indirectly. This characteristic of exhaust system enables sound to be more sportive and the magnitude of sound to be controlled in a vehicle. In recent, A finite element method(FEM) is used in the noise development of the a automotive exhaust system to reduced the time and cost. In this study, to develop a Helmholtz Resonator type of Automotive exhaust system, the structural finite element code, Optistruct was used for radiated noise analysis. First comparisons of natural frequencies between finite element method and experimental result were done to prove effectiveness of the FEM model. Radiated noise from the resonator can be controlled by changing natural frequency inside of the resonator. Also input data required for the radiated noise analysis was obtained through vibration test. Finally, acoustic analysis results using FEM were compared with the test results, it was confirmed that its reliability.