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Radiation Noise Analysis for Electric Scooter Swing-arm
Published November 08, 2011 by Society of Automotive Engineers of Japan in Japan
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Traditionally, a Boundary Element Method (BEM) is often used for a radiation noise analysis. In recent years, to define an infinite region, a Finite Element Method (FEM) that can use an infinite boundary condition has been developed. However, studies on the radiation noise analysis by the FEM are few.
Recently a number of an electric scooter has been increased. One of development issues is a radiation noise by a vibration of a wall surface of a swing-arm. In this paper, the vibration of the wall surface of the swing-arm is calculated, and a sound pressure level (SPL) of the radiation noise is calculated using a result of the frequency response analysis. And compare results of an experimental and an analytical sound pressure, its results were matched to within 5% error. Furthermore we used the method of this paper, proposed the model to reduce the radiation noise 10dB. Then we compare with the FEM and the BEM to verify the computation time and the mesh size.
CitationSato, S., Sunayama, Y., and Sakamoto, Y., "Radiation Noise Analysis for Electric Scooter Swing-arm," SAE Technical Paper 2011-32-0650, 2011.
- Yamazaki, T. Kojima, E. “Prediction of sound power radiated from oil hydraulic pump using FEM and BEM” Acoust. Sci. & Tech. 24 2 103 105 2003
- Tanaka, E. Hojoh, H. Mutoh, D. Motoshiromizu, H. Ohno, K. Tanaka, N. “Vibration and Sound-Radiation Analysis for Designing a Low-Noise Gearbox with a Multi-Stage Helical Gear System” JSME international journal 46 3 1178 1185 2003
- Pricken, F. “Top Acoustic of Plastic Air Intake Manifolds” SAE 1999-01-0319 1 6 1999
- Kaneda, S. Yu, Q. Shiratori, M. Motoyama, K. “Structural Design Optimization for reducing Sound Radiation from a Vibrating Plate Using a Genetic Algorithm” JSME international journal 46 3 1000 1009 2003