集中質量を有する板の音響放射効率(機械力学,計測,自動制御)

概要

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The radiation efficiency of a plate carrying concentrated masses has been studied. The variation of the radiation efficiency of a plate occurs due to attaching a mass to the plate at frequencies below the coincidence frequency. The reason of the efficiency variation can be interpreted physically by using the concept of volume velocity cancellations. The volume velocities on the plate surface except the regions near the four corners are canceled out when the plate is uniform, while the cancellation of the volume velocities is disturbed around the mass attached on the plate. Attaching a mass increases the radiation efficiency of a plate. In this paper, the approximate expression has been developed for the variation of the raiation efficiency of a plate due to attaching concentrated masses in case where a large number of modes are excited. Experimental results show that the approximate expression is valid and useful.
一般社団法人日本機械学会の論文
2005-01-25