G205 流体-構造の連成計算による防音カバー周りの音圧レベル分布解析(2)(GS2 空力音,音響,音波,一般セッション)

概要

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In recent years, noise pollution with construction activity is treated as a growing problem. Noise Pollution Regulation Law executes as a result of development of noise pollution. For the purpose, construction machines have been required noise reduction. There are two ways for noise reduction. The one, it is sound source treatment. This way is able to reduce noise by weakening the vibrations of sound source. This way has a dramatic effect on noise reduction, however it is usually difficult to realize because there are many different kinds of sound source. The other one is to take care for propagation path. This way is usually realized to reduce noise by covered with sound proof cover. The biggest benefit in this way is very simple method. In this way, it is very important to calculate and predict sound reduction effectiveness. We have studied a way of analysis on Sound Pressure Level around a soundproof cover by Fluid-Structure Interactions calculation. In this paper the method and results are shown about appropriateness of calculation for acoustic damping phenomenon.
2007-11-17