108 FAN NOISE AND RESONANCE FREQUENCY ANALYSIS IN FAN-COOLED INDUCTION MOTOR(O.S.2 Vibration and Noise Reduction Technology II)
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概要
- 論文の詳細を見る
In recent years, with the rise of concern in environmental problems, noise reduction in motors has become a stringent requirement. There are three kinds of motor acoustic noise: ventilation noise, electromagnetic noise and machine noise. It is assumed that ventilation noise in high speed machines consists mostly of fan noise. Fan noise depends on the rotational speed and the number of fan blades and the turbulence sound is produced by the disturbed flow of cooling air. Many studies have been done on reduction of fan blade and on turbulence noise by flow analysis based on number of fan blade and shape. However, there have been no papers describing the spatial resonance frequency of the fan spatial, which is a propagation channel of the fan noise. Thus, in this paper, the spatial resonance frequency and its resonance mode of the fan channel is analyzed by FEM and experiments. The effect of sound due to rotation and resonance mode on noise is also described.
- 一般社団法人日本機械学会の論文
- 2005-05-31
著者
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Noda Shinichi
Toshiba Corporation Power And Industrial System S R&d Center
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Noda Shinichi
Toshiba Co.
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MIZUNO Sueyoshi
Toshiba corporation, Power and Industrial System s R&D Center
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SUZUKI Katsumi
Toshiba corporation, Power and Industrial System s R&D Center
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Mizuno Sueyoshi
Toshiba Corporation Power And Industrial System S R&d Center
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SUZUKI Katsumi
Toshiba Corporation
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