Natural frequencies of a plate,or a membrane,with an air layer

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概要

• 論文の詳細を見る

• Natural frequencies of a plate, or a membrane, with an air layer which is open-ended along the edge is analyzed, and the effect of the air layer on the plate, or on the membrane, is revealed. Thses results of the analysis are confirmed by the related experiment. The air layer acts as a aerodynamic spring when a propagation velocity of the plate vibration is faster than that of the sound pressure in the horizontal direction in the air layer. In the reverse case, the air layer acts as a negative stiffness. Hence, under the former condition, the natural frequencies increase inversely to the decreasing depth of the air layer. Under the latter condition, the natural frequencies decrease. It is, therefore, concluded that the effect of the air layer on the plate vibration, or the membrane vibration, reverses at the coincidence frequency.

• 社団法人日本音響学会の論文

著者

• YASUOKA Masahito

  Science Univ. of Tokyo

• Hashimoto Norihisa

  Technical Research Institute Konoike Construction Co.ltd.

• Yasuoka Masahito

  Technical Research Institute,Konoike Construction Co.Ltd.

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• Natural frequencies of a plate,or a membrane,with an air layer

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